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U.S. Severe Weather Map

更新时刻: GMT时区2008年07月04日 AM 02时45分Edit My Time Zone
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Click on a colored region of the map for details.

Weather Warning Legend:
 
Tornado Warning - Tornado Warning
A tornado warning is issued when a funnel cloud has been spotted or a rotating thunderstorm has been indicated by doppler radar.
Tornado Watch - Tornado Watch
A tornado watch is issued when thunderstorms in and near the watch box area may produce tornadoes.
Severe Thunderstorm Warning - Severe Thunderstorm Warning
A severe thunderstorm warning is issued when a storm with any of these severe weather criteria is approaching the warning area:
  • Hail 3/4 of an inch or greater
  • Winds greater than 58 mph
  • Recent history of tree, telephone pole, or other structural damage
Severe Thunderstorm Watch - Severe Thunderstorm Watch
A severe thunderstorm watch is issued when there is a possibility that thunderstorms in and near the watch box area may produce the following severe weather conditions:
  • Hail 3/4 of an inch or greater
  • Winds greater than 58 mph
Winter Weather Advisory - Winter Weather Advisory
A winter weather advisory is issued when significant accumulations of snow, sleet, or freezing rain may affect the advisory area.
High Wind Advisory - High Wind Advisory
A high wind advisory is issued when sustained winds of 31 mph or greater are expected to occur for at least 1 hour. This advisory can also be issued if winds of 46 mph or greater are expected for any length of time.
Flood Warning - Flood Warning
A flood warning is issued when flooding is occuring or is about to occur.
Flood Watch / Flood Statement - Flood Watch / Flood Statement
A flood watch is issued when flooding is possible in the watch area.
Hurricane Local Statement - Hurricane Local Statement
This statement is issued when it is necessary to inform the public of hurricane or tropical storm watches and warnings. These statements contain detailed information of when and what adverse conditions to expect as a result of the tropical system affecting the statement area.
Heat Advisory - Heat Advisory
A heat advisory is issued when the heat index is expected to exceed 105 F (100 F in New York City) or if nighttime lows are expected to be greater than 80 F for two or more nights.
Dense Fog Advisory - Dense Fog Advisory
A dense fog advisory is issued when fog that reduces visibility to 1/4 mile or less is possible in the advisory area.
Fire Weather Advisory - Fire Weather Advisory
A fire weather advisory is issued when dry conditions in the advisory area result in a situation where forest or brush fires are possible.
Hurricane Watch - Hurricane Watch
A Hurricane Watch means hurricane conditions are possible in the next 24 hours.
Hurricane Warning - Hurricane Warning
A Hurricane Warning means hurricane conditions are expected in the next 24 hours.
Tropical Storm Watch - Tropical Storm Watch
A Tropical Storm warning means tropical storm conditions are possible in the next 24 hours.
Tropical Storm Warning - Tropical Storm Warning
A Tropical Storm warning means tropical storm conditions are expected in the next 24 hours.
 
U.S. Warnings by County
 
 
Alaska
Public Information Statement:
Arizona
Severe Thunderstorm Warning:
Flash Flood Warning:
Excessive Heat Warning:
Excessive Heat Watch, Excessive Heat Warning:
Public Information Statement:
Arkansas
Flood Warning:
Special Weather Statement:
California
Excessive Heat Warning:
Special Weather Statement:
Public Information Statement:
Colorado
Severe Thunderstorm Warning:
Flood Warning:
Areal Flood Advisory:
Public Information Statement:
Georgia
Record Report:
Idaho
Fire Weather Watch:
Record Report:
Public Information Statement:
Illinois
Flood Warning:
Flash Flood Warning:
Flash Flood Warning:
Areal Flood Advisory:
Indiana
Lakeshore Flood Statement:
Iowa
Flood Warning:
Louisiana
Flood Warning:
Michigan
Flood Warning:
Lakeshore Flood Statement:
Record Report:
Minnesota
Public Information Statement:
Missouri
Flood Warning:
Flood Warning, Areal Flood Warning:
Flash Flood Warning:
Areal Flood Warning:
Flash Flood Watch:
Montana
Flood Warning:
Lake Wind Advisory:
Record Report:
Nevada
Fire Weather Watch:
Fire Weather Watch, Fire Weather Warning:
Fire Weather Warning:
New Mexico
Flood Watch / Flood Statement:
Special Weather Statement:
North Carolina
Special Weather Statement:
Record Report:
North Dakota
Flood Warning:
Ohio
Flood Warning:
Oklahoma
Areal Flood Advisory:
Special Weather Statement:
Oregon
Fire Weather Warning:
South Carolina
Record Report:
Tennessee
Record Report:
Texas
Flood Watch / Flood Statement:
Special Weather Statement:
Record Report:
Utah
Fire Weather Warning:
Record Report:
Public Information Statement:
Washington
Fire Weather Warning:
Record Report:
Wisconsin
Flood Warning:
Public Information Statement:
Wyoming
Record Report:
Public Information Statement:
 
 

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