Hurricane Preparedness - Winds & Tornadoes

Updated: June 2024

High Winds from Hurricanes

We continue our coverage of the 2024 Hurricane Preparedness Week by looking at two more of the hurricane hazards.  In particular, we'll look at High Wind and Tornadoes.

 

Looking for past or current hurricanes?  Click Image or Here

Cat.	Speed (mph)
1	74-95
2	96-110
3	111-129
4	130-156
5	>157

The intensity of a landfalling hurricane is expressed in terms of categories that relate wind speeds and potential damage. According to the Saffir-Simpson Hurricane Scale, a Category 1 hurricane has lighter winds compared to storms in higher categories. A Category 4 hurricane would have winds between 131 and 155 mph and, on the average, would usually be expected to cause 100 times the damage of the Category 1 storm.

Depending on circumstances, less intense storms may still be strong enough to produce damage, particularly in areas that have not prepared in advance.  A summary chart is shown here. More details were covered in 2024 Hurricanes - How They Work.

RELATED INFORMATION

• HIGH WIND SAFETY ACTIONS
• SAFFIR-SIMPSON HURRICANE SCALE (updated  2012)
• HURRICANE WIND DECAY
• HISTORIC HIGH WIND EVENTS

Tornadoes 

A tornado is a dark funnel-shaped cloud made up of violently rotating winds that can reach speeds of up to 300 m.p.h. The diameter of a tornado can vary between a few feet and a mile, and its track can extend from less than a mile to several hundred miles. Tornadoes can occur any time, with many occurring in spring or early summer.

Hurricanes can also produce tornadoes that add to the storm's destructive power. Tornadoes are most likely to occur in the right-front quadrant of the hurricane. However, they are also often found elsewhere embedded in the rainbands, well away from the center of the hurricane.

Tornado Facts

• When associated with hurricanes, tornadoes are not usually accompanied by hail or a lot of lightning, clues that citizens in other parts of the country watch for.
• Tornado production can occur for days after landfall when the tropical cyclone remnants maintain an identifiable low pressure circulation.
• They can also develop at any time of the day or night during landfall. However, by 12 hours after landfall, tornadoes tend to occur mainly during daytime hours.

The Fujita Scale

F-Scale Number	Intensity Phrase	Wind Speed	Type of Damage Done
F0	Gale tornado	40-72 mph	Some damage to chimneys; breaks branches off trees; pushes over shallow-rooted trees; damages sign boards.
F1	Moderate tornado	73-112 mph	The lower limit is the beginning of hurricane wind speed; peels surface off roofs; mobile homes pushed off foundations or overturned; moving autos pushed off the roads; attached garages may be destroyed.
F2	Significant tornado	113-157 mph	Considerable damage. Roofs torn off frame houses; mobile homes demolished; boxcars pushed over; large trees snapped or uprooted; light object missiles generated.
F3	Severe tornado	158-206 mph	Roof and some walls torn off well constructed houses; trains overturned; most trees in fores uprooted
F4	Devastating tornado	207-260 mph	Well-constructed houses leveled; structures with weak foundations blown off some distance; cars thrown and large missiles generated.
F5	Incredible tornado	261-318 mph	Strong frame houses lifted off foundations and carried considerable distances to disintegrate; automobile sized missiles fly through the air in excess of 100 meters; trees debarked; steel re-inforced concrete structures badly damaged.
F6	Inconceivable tornado	319-379 mph	These winds are very unlikely. The small area of damage they might produce would probably not be recognizable along with the mess produced by F4 and F5 wind that would surround the F6 winds. Missiles, such as cars and refrigerators would do serious secondary damage that could not be directly identified as F6 damage. If this level is ever achieved, evidence for it might only be found in some manner of ground swirl pattern, for it may never be identifiable through engineering studies

Read entire series (click here)

More links and information about tropical storms and other weather conditions can be found in the Weather & Hurricane Zone tabs above.


If you live in, or plan to vacation in, an area where hurricanes are prevalent, please prepare in advance by reading our series.

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2018 Hurricane Preparedness - Winds & Tornadoes

High Winds from Hurricanes

We continue our coverage of the 2018 Hurricane Preparedness Week by looking at two more of the hurricane hazards.  In particular, we'll look at High Wind and Tornadoes.

 

Looking for past or current hurricanes?  Click Image or Here

Cat.	Speed (mph)
1	74-95
2	96-110
3	111-129
4	130-156
5	>157

The intensity of a landfalling hurricane is expressed in terms of categories that relate wind speeds and potential damage. According to the Saffir-Simpson Hurricane Scale, a Category 1 hurricane has lighter winds compared to storms in higher categories. A Category 4 hurricane would have winds between 131 and 155 mph and, on the average, would usually be expected to cause 100 times the damage of the Category 1 storm.

Depending on circumstances, less intense storms may still be strong enough to produce damage, particularly in areas that have not prepared in advance.  A summary chart is shown here. More details were covered in 2014 Hurricanes - How They Work.

RELATED INFORMATION

• HIGH WIND SAFETY ACTIONS
• SAFFIR-SIMPSON HURRICANE SCALE (updated  2012)
• HURRICANE WIND DECAY
• HISTORIC HIGH WIND EVENTS
• RISK AREAS

Tornadoes 

A tornado is a dark funnel-shaped cloud made up of violently rotating winds that can reach speeds of up to 300 m.p.h. The diameter of a tornado can vary between a few feet and a mile, and its track can extend from less than a mile to several hundred miles. Tornadoes can occur any time, with many occurring in spring or early summer.

Hurricanes can also produce tornadoes that add to the storm's destructive power. Tornadoes are most likely to occur in the right-front quadrant of the hurricane. However, they are also often found elsewhere embedded in the rainbands, well away from the center of the hurricane.

Tornado Facts

• When associated with hurricanes, tornadoes are not usually accompanied by hail or a lot of lightning, clues that citizens in other parts of the country watch for.
• Tornado production can occur for days after landfall when the tropical cyclone remnants maintain an identifiable low pressure circulation.
• They can also develop at any time of the day or night during landfall. However, by 12 hours after landfall, tornadoes tend to occur mainly during daytime hours.

The Fujita Scale

F-Scale Number	Intensity Phrase	Wind Speed	Type of Damage Done
F0	Gale tornado	40-72 mph	Some damage to chimneys; breaks branches off trees; pushes over shallow-rooted trees; damages sign boards.
F1	Moderate tornado	73-112 mph	The lower limit is the beginning of hurricane wind speed; peels surface off roofs; mobile homes pushed off foundations or overturned; moving autos pushed off the roads; attached garages may be destroyed.
F2	Significant tornado	113-157 mph	Considerable damage. Roofs torn off frame houses; mobile homes demolished; boxcars pushed over; large trees snapped or uprooted; light object missiles generated.
F3	Severe tornado	158-206 mph	Roof and some walls torn off well constructed houses; trains overturned; most trees in fores uprooted
F4	Devastating tornado	207-260 mph	Well-constructed houses leveled; structures with weak foundations blown off some distance; cars thrown and large missiles generated.
F5	Incredible tornado	261-318 mph	Strong frame houses lifted off foundations and carried considerable distances to disintegrate; automobile sized missiles fly through the air in excess of 100 meters; trees debarked; steel re-inforced concrete structures badly damaged.
F6	Inconceivable tornado	319-379 mph	These winds are very unlikely. The small area of damage they might produce would probably not be recognizable along with the mess produced by F4 and F5 wind that would surround the F6 winds. Missiles, such as cars and refrigerators would do serious secondary damage that could not be directly identified as F6 damage. If this level is ever achieved, evidence for it might only be found in some manner of ground swirl pattern, for it may never be identifiable through engineering studies

Read entire series (click here)

More links and information about tropical storms and other weather conditions can be found in the Weather & Hurricane Zone tabs above.


Hurricane Preparedness Week:   
May 6-12, 2018

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2017 Hurricane Preparedness - Winds & Tornadoes

High Winds from Hurricanes

We continue our coverage of the 2017 Hurricane Preparedness Week by looking at two more of the hurricane hazards.  In particular, we'll look at High Wind and Tornadoes.

 

Looking for past or current hurricanes?  Click Image or Here

Cat.	Speed (mph)
1	74-95
2	96-110
3	111-129
4	130-156
5	>157

The intensity of a landfalling hurricane is expressed in terms of categories that relate wind speeds and potential damage. According to the Saffir-Simpson Hurricane Scale, a Category 1 hurricane has lighter winds compared to storms in higher categories. A Category 4 hurricane would have winds between 131 and 155 mph and, on the average, would usually be expected to cause 100 times the damage of the Category 1 storm.

Depending on circumstances, less intense storms may still be strong enough to produce damage, particularly in areas that have not prepared in advance.  A summary chart is shown here. More details were covered in 2014 Hurricanes - How They Work.

RELATED INFORMATION

• HIGH WIND SAFETY ACTIONS
• SAFFIR-SIMPSON HURRICANE SCALE (updated  2012)
• HURRICANE WIND DECAY
• HISTORIC HIGH WIND EVENTS
• RISK AREAS

Tornadoes 

A tornado is a dark funnel-shaped cloud made up of violently rotating winds that can reach speeds of up to 300 m.p.h. The diameter of a tornado can vary between a few feet and a mile, and its track can extend from less than a mile to several hundred miles. Tornadoes can occur any time, with many occurring in spring or early summer.

Hurricanes can also produce tornadoes that add to the storm's destructive power. Tornadoes are most likely to occur in the right-front quadrant of the hurricane. However, they are also often found elsewhere embedded in the rainbands, well away from the center of the hurricane.

Tornado Facts

• When associated with hurricanes, tornadoes are not usually accompanied by hail or a lot of lightning, clues that citizens in other parts of the country watch for.
• Tornado production can occur for days after landfall when the tropical cyclone remnants maintain an identifiable low pressure circulation.
• They can also develop at any time of the day or night during landfall. However, by 12 hours after landfall, tornadoes tend to occur mainly during daytime hours.

The Fujita Scale

F-Scale Number	Intensity Phrase	Wind Speed	Type of Damage Done
F0	Gale tornado	40-72 mph	Some damage to chimneys; breaks branches off trees; pushes over shallow-rooted trees; damages sign boards.
F1	Moderate tornado	73-112 mph	The lower limit is the beginning of hurricane wind speed; peels surface off roofs; mobile homes pushed off foundations or overturned; moving autos pushed off the roads; attached garages may be destroyed.
F2	Significant tornado	113-157 mph	Considerable damage. Roofs torn off frame houses; mobile homes demolished; boxcars pushed over; large trees snapped or uprooted; light object missiles generated.
F3	Severe tornado	158-206 mph	Roof and some walls torn off well constructed houses; trains overturned; most trees in fores uprooted
F4	Devastating tornado	207-260 mph	Well-constructed houses leveled; structures with weak foundations blown off some distance; cars thrown and large missiles generated.
F5	Incredible tornado	261-318 mph	Strong frame houses lifted off foundations and carried considerable distances to disintegrate; automobile sized missiles fly through the air in excess of 100 meters; trees debarked; steel re-inforced concrete structures badly damaged.
F6	Inconceivable tornado	319-379 mph	These winds are very unlikely. The small area of damage they might produce would probably not be recognizable along with the mess produced by F4 and F5 wind that would surround the F6 winds. Missiles, such as cars and refrigerators would do serious secondary damage that could not be directly identified as F6 damage. If this level is ever achieved, evidence for it might only be found in some manner of ground swirl pattern, for it may never be identifiable through engineering studies

Read Entire Series (Click Here)

More links and information about tropical storms and other weather conditions can be found in the Weather & Hurricane Zone tabs above.


Hurricane Preparedness Week:   
May 7-13, 2017

2016 Hurricane Preparedness - Winds & Tornadoes

High Winds from Hurricanes

We continue our coverage of the 2016 Hurricane Preparedness Week by looking at two more of the hurricane hazards.  In particular, we'll look at High Wind and Tornadoes.

 

Looking for past or current hurricanes?  Click Image or Here

Cat.	Speed (mph)
1	74-95
2	96-110
3	111-129
4	130-156
5	>157

The intensity of a landfalling hurricane is expressed in terms of categories that relate wind speeds and potential damage. According to the Saffir-Simpson Hurricane Scale, a Category 1 hurricane has lighter winds compared to storms in higher categories. A Category 4 hurricane would have winds between 131 and 155 mph and, on the average, would usually be expected to cause 100 times the damage of the Category 1 storm.

Depending on circumstances, less intense storms may still be strong enough to produce damage, particularly in areas that have not prepared in advance.  A summary chart is shown here. More details were covered in 2014 Hurricanes - How They Work.

RELATED INFORMATION

• HIGH WIND SAFETY ACTIONS
• SAFFIR-SIMPSON HURRICANE SCALE (updated  2012)
• HURRICANE WIND DECAY
• HISTORIC HIGH WIND EVENTS
• RISK AREAS

Tornadoes 

A tornado is a dark funnel-shaped cloud made up of violently rotating winds that can reach speeds of up to 300 m.p.h. The diameter of a tornado can vary between a few feet and a mile, and its track can extend from less than a mile to several hundred miles. Tornadoes can occur any time, with many occurring in spring or early summer.

Hurricanes can also produce tornadoes that add to the storm's destructive power. Tornadoes are most likely to occur in the right-front quadrant of the hurricane. However, they are also often found elsewhere embedded in the rainbands, well away from the center of the hurricane.

Tornado Facts

• When associated with hurricanes, tornadoes are not usually accompanied by hail or a lot of lightning, clues that citizens in other parts of the country watch for.
• Tornado production can occur for days after landfall when the tropical cyclone remnants maintain an identifiable low pressure circulation.
• They can also develop at any time of the day or night during landfall. However, by 12 hours after landfall, tornadoes tend to occur mainly during daytime hours.

The Fujita Scale

F-Scale Number	Intensity Phrase	Wind Speed	Type of Damage Done
F0	Gale tornado	40-72 mph	Some damage to chimneys; breaks branches off trees; pushes over shallow-rooted trees; damages sign boards.
F1	Moderate tornado	73-112 mph	The lower limit is the beginning of hurricane wind speed; peels surface off roofs; mobile homes pushed off foundations or overturned; moving autos pushed off the roads; attached garages may be destroyed.
F2	Significant tornado	113-157 mph	Considerable damage. Roofs torn off frame houses; mobile homes demolished; boxcars pushed over; large trees snapped or uprooted; light object missiles generated.
F3	Severe tornado	158-206 mph	Roof and some walls torn off well constructed houses; trains overturned; most trees in fores uprooted
F4	Devastating tornado	207-260 mph	Well-constructed houses leveled; structures with weak foundations blown off some distance; cars thrown and large missiles generated.
F5	Incredible tornado	261-318 mph	Strong frame houses lifted off foundations and carried considerable distances to disintegrate; automobile sized missiles fly through the air in excess of 100 meters; trees debarked; steel re-inforced concrete structures badly damaged.
F6	Inconceivable tornado	319-379 mph	These winds are very unlikely. The small area of damage they might produce would probably not be recognizable along with the mess produced by F4 and F5 wind that would surround the F6 winds. Missiles, such as cars and refrigerators would do serious secondary damage that could not be directly identified as F6 damage. If this level is ever achieved, evidence for it might only be found in some manner of ground swirl pattern, for it may never be identifiable through engineering studies

2015 Hurricane Preparedness - High Winds

Hurricane High Winds & Tornadoes

Third In the 2015 Series

Hurricane Preparedness Week playlist on YouTube

High Winds from Hurricanes

We continue our coverage of the 2015 Hurricane Preparedness Week by looking at two more of the hurricane hazards.  In particular, we'll look at High Wind and Tornadoes.

 

Looking for past or current hurricanes?  Click Image or Here

Cat.	Speed (mph)
1	74-95
2	96-110
3	111-129
4	130-156
5	>157

The intensity of a landfalling hurricane is expressed in terms of categories that relate wind speeds and potential damage. According to the Saffir-Simpson Hurricane Scale, a Category 1 hurricane has lighter winds compared to storms in higher categories. A Category 4 hurricane would have winds between 131 and 155 mph and, on the average, would usually be expected to cause 100 times the damage of the Category 1 storm.

Depending on circumstances, less intense storms may still be strong enough to produce damage, particularly in areas that have not prepared in advance.  A summary chart is shown here. More details were covered in 2014 Hurricanes - How They Work.

RELATED INFORMATION

• HIGH WIND SAFETY ACTIONS
• SAFFIR-SIMPSON HURRICANE SCALE (updated  2012)
• HURRICANE WIND DECAY
• HISTORIC HIGH WIND EVENTS
• RISK AREAS

Tornadoes 

A tornado is a dark funnel-shaped cloud made up of violently rotating winds that can reach speeds of up to 300 m.p.h. The diameter of a tornado can vary between a few feet and a mile, and its track can extend from less than a mile to several hundred miles. Tornadoes can occur any time, with many occurring in spring or early summer.

Hurricanes can also produce tornadoes that add to the storm's destructive power. Tornadoes are most likely to occur in the right-front quadrant of the hurricane. However, they are also often found elsewhere embedded in the rainbands, well away from the center of the hurricane.

Tornado Facts

• When associated with hurricanes, tornadoes are not usually accompanied by hail or a lot of lightning, clues that citizens in other parts of the country watch for.
• Tornado production can occur for days after landfall when the tropical cyclone remnants maintain an identifiable low pressure circulation.
• They can also develop at any time of the day or night during landfall. However, by 12 hours after landfall, tornadoes tend to occur mainly during daytime hours.

The Fujita Scale

F-Scale Number	Intensity Phrase	Wind Speed	Type of Damage Done
F0	Gale tornado	40-72 mph	Some damage to chimneys; breaks branches off trees; pushes over shallow-rooted trees; damages sign boards.
F1	Moderate tornado	73-112 mph	The lower limit is the beginning of hurricane wind speed; peels surface off roofs; mobile homes pushed off foundations or overturned; moving autos pushed off the roads; attached garages may be destroyed.
F2	Significant tornado	113-157 mph	Considerable damage. Roofs torn off frame houses; mobile homes demolished; boxcars pushed over; large trees snapped or uprooted; light object missiles generated.
F3	Severe tornado	158-206 mph	Roof and some walls torn off well constructed houses; trains overturned; most trees in fores uprooted
F4	Devastating tornado	207-260 mph	Well-constructed houses leveled; structures with weak foundations blown off some distance; cars thrown and large missiles generated.
F5	Incredible tornado	261-318 mph	Strong frame houses lifted off foundations and carried considerable distances to disintegrate; automobile sized missiles fly through the air in excess of 100 meters; trees debarked; steel re-inforced concrete structures badly damaged.
F6	Inconceivable tornado	319-379 mph	These winds are very unlikely. The small area of damage they might produce would probably not be recognizable along with the mess produced by F4 and F5 wind that would surround the F6 winds. Missiles, such as cars and refrigerators would do serious secondary damage that could not be directly identified as F6 damage. If this level is ever achieved, evidence for it might only be found in some manner of ground swirl pattern, for it may never be identifiable through engineering studies

2014 Hurricane Preparedness - High Winds

Hurricane High Winds & Tornadoes

Third In the 2014 Series

Hurricane Preparedness Week playlist on YouTube

High Winds from Hurricanes

We continue our coverage of the 2014 Hurricane Preparedness Week by looking at two more of the hurricane hazards.  In particular, we'll look at High Wind and Tornadoes.

Changes to NHC products for 2014 include Elimination of the Intensity Probability Table
Update on NHC Products and Services for 2014 (PDF)

 

Looking for past or current hurricanes?  Click Image or Here

Cat.	Speed (mph)
1	74-95
2	96-110
3	111-129
4	130-156
5	>157

The intensity of a landfalling hurricane is expressed in terms of categories that relate wind speeds and potential damage. According to the Saffir-Simpson Hurricane Scale, a Category 1 hurricane has lighter winds compared to storms in higher categories. A Category 4 hurricane would have winds between 131 and 155 mph and, on the average, would usually be expected to cause 100 times the damage of the Category 1 storm.

Depending on circumstances, less intense storms may still be strong enough to produce damage, particularly in areas that have not prepared in advance.  A summary chart is shown here. More details were covered in 2014 Hurricanes - How They Work.

RELATED INFORMATION

• HIGH WIND SAFETY ACTIONS
• SAFFIR-SIMPSON HURRICANE SCALE (updated  2012)
• HURRICANE WIND DECAY
• HISTORIC HIGH WIND EVENTS
• RISK AREAS

Tornadoes 

A tornado is a dark funnel-shaped cloud made up of violently rotating winds that can reach speeds of up to 300 m.p.h. The diameter of a tornado can vary between a few feet and a mile, and its track can extend from less than a mile to several hundred miles. Tornadoes can occur any time, with many occurring in spring or early summer.

Hurricanes can also produce tornadoes that add to the storm's destructive power. Tornadoes are most likely to occur in the right-front quadrant of the hurricane. However, they are also often found elsewhere embedded in the rainbands, well away from the center of the hurricane.

Tornado Facts

• When associated with hurricanes, tornadoes are not usually accompanied by hail or a lot of lightning, clues that citizens in other parts of the country watch for.
• Tornado production can occur for days after landfall when the tropical cyclone remnants maintain an identifiable low pressure circulation.
• They can also develop at any time of the day or night during landfall. However, by 12 hours after landfall, tornadoes tend to occur mainly during daytime hours.

The Fujita Scale

F-Scale Number	Intensity Phrase	Wind Speed	Type of Damage Done
F0	Gale tornado	40-72 mph	Some damage to chimneys; breaks branches off trees; pushes over shallow-rooted trees; damages sign boards.
F1	Moderate tornado	73-112 mph	The lower limit is the beginning of hurricane wind speed; peels surface off roofs; mobile homes pushed off foundations or overturned; moving autos pushed off the roads; attached garages may be destroyed.
F2	Significant tornado	113-157 mph	Considerable damage. Roofs torn off frame houses; mobile homes demolished; boxcars pushed over; large trees snapped or uprooted; light object missiles generated.
F3	Severe tornado	158-206 mph	Roof and some walls torn off well constructed houses; trains overturned; most trees in fores uprooted
F4	Devastating tornado	207-260 mph	Well-constructed houses leveled; structures with weak foundations blown off some distance; cars thrown and large missiles generated.
F5	Incredible tornado	261-318 mph	Strong frame houses lifted off foundations and carried considerable distances to disintegrate; automobile sized missiles fly through the air in excess of 100 meters; trees debarked; steel re-inforced concrete structures badly damaged.
F6	Inconceivable tornado	319-379 mph	These winds are very unlikely. The small area of damage they might produce would probably not be recognizable along with the mess produced by F4 and F5 wind that would surround the F6 winds. Missiles, such as cars and refrigerators would do serious secondary damage that could not be directly identified as F6 damage. If this level is ever achieved, evidence for it might only be found in some manner of ground swirl pattern, for it may never be identifiable through engineering studies

Hurricane Preparedness 2013 - Winds

Hurricane High Winds & Tornadoes

Third In the 2013 Series

Hurricane Preparedness Week playlist on YouTube

High Winds from Hurricanes

We continue our coverage of the 2013 Hurricane Preparedness Week by looking at two more of the hurricane hazards.  In particular, we'll look at High Wind and Tornadoes.

Cat.	Speed (mph)
1	74-95
2	96-110
3	111-129
4	130-156
5	>157

The intensity of a landfalling hurricane is expressed in terms of categories that relate wind speeds and potential damage. According to the Saffir-Simpson Hurricane Scale, a Category 1 hurricane has lighter winds compared to storms in higher categories. A Category 4 hurricane would have winds between 131 and 155 mph and, on the average, would usually be expected to cause 100 times the damage of the Category 1 storm.

Depending on circumstances, less intense storms may still be strong enough to produce damage, particularly in areas that have not prepared in advance.  A summary chart is shown here. More details were covered in Hurricane Preparedness 2013 - Basics & History.

RELATED INFORMATION

• HIGH WIND SAFETY ACTIONS
• SAFFIR-SIMPSON HURRICANE SCALE (updated  2012)
• HURRICANE WIND DECAY
• HISTORIC HIGH WIND EVENTS
• RISK AREAS

Tornadoes 

A tornado is a dark funnel-shaped cloud made up of violently rotating winds that can reach speeds of up to 300 m.p.h. The diameter of a tornado can vary between a few feet and a mile, and its track can extend from less than a mile to several hundred miles. Tornadoes can occur any time, with many occurring in spring or early summer.

Hurricanes can also produce tornadoes that add to the storm's destructive power. Tornadoes are most likely to occur in the right-front quadrant of the hurricane. However, they are also often found elsewhere embedded in the rainbands, well away from the center of the hurricane.

Tornado Facts

• When associated with hurricanes, tornadoes are not usually accompanied by hail or a lot of lightning, clues that citizens in other parts of the country watch for.
• Tornado production can occur for days after landfall when the tropical cyclone remnants maintain an identifiable low pressure circulation.
• They can also develop at any time of the day or night during landfall. However, by 12 hours after landfall, tornadoes tend to occur mainly during daytime hours.

The Fujita Scale

F-Scale Number	Intensity Phrase	Wind Speed	Type of Damage Done
F0	Gale tornado	40-72 mph	Some damage to chimneys; breaks branches off trees; pushes over shallow-rooted trees; damages sign boards.
F1	Moderate tornado	73-112 mph	The lower limit is the beginning of hurricane wind speed; peels surface off roofs; mobile homes pushed off foundations or overturned; moving autos pushed off the roads; attached garages may be destroyed.
F2	Significant tornado	113-157 mph	Considerable damage. Roofs torn off frame houses; mobile homes demolished; boxcars pushed over; large trees snapped or uprooted; light object missiles generated.
F3	Severe tornado	158-206 mph	Roof and some walls torn off well constructed houses; trains overturned; most trees in fores uprooted
F4	Devastating tornado	207-260 mph	Well-constructed houses leveled; structures with weak foundations blown off some distance; cars thrown and large missiles generated.
F5	Incredible tornado	261-318 mph	Strong frame houses lifted off foundations and carried considerable distances to disintegrate; automobile sized missiles fly through the air in excess of 100 meters; trees debarked; steel re-inforced concrete structures badly damaged.
F6	Inconceivable tornado	319-379 mph	These winds are very unlikely. The small area of damage they might produce would probably not be recognizable along with the mess produced by F4 and F5 wind that would surround the F6 winds. Missiles, such as cars and refrigerators would do serious secondary damage that could not be directly identified as F6 damage. If this level is ever achieved, evidence for it might only be found in some manner of ground swirl pattern, for it may never be identifiable through engineering studies

Hurricane Preparedness 2013 - Basics & History

Hurricane Basics & History

First In the 2013 Series

Hurricane Preparedness Week playlist on YouTube

Looking for past or current hurricanes?  Click Image or Here

President Obama declared May 26 - June 1 “National Hurricane Preparedness Week." FEMA, along with the National Oceanic and Atmospheric Administration (NOAA), is helping to raise awareness of steps that can be taken to help protect citizens, and their communities and property. 

What is a Hurricane?

A hurricane is a type of tropical cyclone, which is a generic term for a low pressure system that generally forms in the tropics. The cyclone is accompanied by thunderstorms and, in the Northern Hemisphere, a counterclockwise circulation of winds near the earth's surface. Tropical cyclones are classified as follows:

* Sustained winds A 1-minute average wind measured at about 33 ft (10 meters) above the surface. ** 1 knot = 1 nautical mile per hour or 1.15 statute miles per hour. Abbreviated as "kt".

Tropical Depression
An organized system of clouds and thunderstorms with a defined surface circulation and maximum sustained winds* of 38 mph (33 kt**) or less

Tropical Storm
An organized system of strong thunderstorms with a defined surface circulation and maximum sustained winds of 39-73 mph (34-63 kt)

Hurricane
An intense tropical weather system of strong thunderstorms with a well-defined surface circulation and maximum sustained winds of 74 mph (64 kt) or higher

Familiarize yourself with the terms that are used to identify a hurricane.

• A hurricane watch means a hurricane is possible in your area. Be prepared to evacuate. Monitor local radio and television news outlets or listen to NOAA Weather Radio for the latest developments.
• A hurricane warning is when a hurricane is expected in your area. If local authorities advise you to evacuate, leave immediately.

Hurricanes are classified into five categories based on their wind speed, central pressure, and damage potential. Category Three and higher hurricanes are considered major hurricanes, though Categories One and Two are still extremely dangerous and warrant your full attention.The following chart details the categories and the damage that can result from a storm with that strength.

 
Saffir-Simpson Hurricane Scale

2012 Revision to the Saffir Simpson Hurricane Wind Scale (PDF)

Scale Number (Category)	Sustained  Winds	Damage	Storm Surge
1	74-95 mph 64-82 kt 119-153 km/h	Very dangerous winds will produce some damage: Well-constructed frame homes could have damage to roof, shingles, vinyl siding and gutters. Large branches of trees will snap and shallowly rooted trees may be toppled. Extensive damage to power lines and poles likely will result in power outages that could last a few to several days.	4-5 feet
2	96-110 mph 83-95 kt 154-177 km/h	Extremely dangerous winds will cause extensive damage: Well-constructed frame homes could sustain major roof and siding damage. Many shallowly rooted trees will be snapped or uprooted and block numerous roads. Near-total power loss is expected with outages that could last from several days to weeks.	6-8 feet
3  (major)	111-129 mph 96-112 kt 178-208 km/h	Devastating damage will occur: Well-built framed homes may incur major damage or removal of roof decking and gable ends. Many trees will be snapped or uprooted, blocking numerous roads. Electricity and water will be unavailable for several days to weeks after the storm passes.	9-12 feet
4 (major)	130-156 mph 113-136 kt 209-251 km/h	Catastrophic damage will occur: Well-built framed homes can sustain severe damage with loss of most of the roof structure and/or some exterior walls. Most trees will be snapped or uprooted and power poles downed. Fallen trees and power poles will isolate residential areas. Power outages will last weeks to possibly months. Most of the area will be uninhabitable for weeks or months.	13-18 feet
5  (major)	157 mph or higher 137 kt or higher 252 km/h or higher	Catastrophic damage will occur: A high percentage of framed homes will be destroyed, with total roof failure and wall collapse. Fallen trees and power poles will isolate residential areas. Power outages will last for weeks to possibly months. Most of the area will be uninhabitable for weeks or months.	Greater than 18 feet

Hurricane History

 
2012 Atlantic Hurricane Season Track Map (click to enlarge)

In the following article, we look at the 2012 Hurricane season in review, comparing the forecast to actual results.   We also look at NOAA and Colorado State University forecasts for the 2013 Season.

NOAA 2013 Hurricane Season Predictions

Hurricane Service Assessments	Billion Dollar Storms
8/05 Hurricane Katrina 8/04 Hurricane Charley 9/03: Hurricane Isabel 12/02: Super Typhoon Pongsona 6/01: Tropical Storm Allison 9/96: Hurricane Fran 7/96: Hurricane Bertha 9/95: Hurricane Marilyn 7/94: Tropical Storm Alberto 9/92: Hurricane Iniki 8/92: Hurricane Andrew 9/89: Hurricane Hugo	8/11 Hurricane Irene 9/08 Hurricane Ike 9/08 Hurricane Gustav 7/08 Hurricane Dolly 10/05 Hurricane Wilma 9/05: Hurricane Rita 8/05: Hurricane Katrina 9/03: Hurricane Isabel 9/99: Hurricane Floyd 9/98: Hurricane Georges 8/98: Hurricane Bonnie 9/96: Hurricane Fran 10/95: Hurricane Opal 7/94: Tropical Storm Alberto 8/92: Hurricane Andrew Other events since 1980

Central North Pacific Hurricane History (1800s - present)

(Compiled by the Central Pacific Hurricane Center, Honolulu).

We will continue coverage of Hurricane Preparedness Week by looking at some of the hazards starting tomorrow.  Additional Hurricane information can be found in our static Weather tab.