National Weather Service United States Department of Commerce

Fire Weather Concerns and Severe Weather

Dry and breezy conditions will bring elevated to critical fire weather conditions across portions of the northern and central High Plains through this weekend, where fuels remain largely receptive. Severe thunderstorms and heavy rainfall are possible from the Plains into the Upper Midwest, as well as in the Ohio Valley and portions of the Mid-Atlantic through this weekend. Read More >

 

Summer Briefing

 

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Local Storm Reports

Severe Weather Outlooks

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Information on SPC's Severe Thunderstorm Risk Categories

River Flooding

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Precipitation Forecast

1-Day Rainfall

2-Day Rainfall

3-Day Rainfall

 

Forecast Timelines

Single Site Timelines

Detailed Point Forecast

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Climate Outlooks

8-14 Day Temp Outlook

8-14 Day Precip Outlook

 

Drought Monitor

 

Summer Weather Definitions

Tornado or Severe Thunderstorm WATCH:

Conditions are favorable for the development of tornadoes, large hail, and/or damaging winds.

 
Tornado WARNING:

A tornado has been detected on radar or sighted by trained spotters.

 
Severe Thunderstorm WARNING:

A severe thunderstorm has been detected on radar or reported by trained spotters. A severe thunderstorm is a storm that produces hail 1 inch or larger and/or winds 58 mph or greater

 
Severe Thunderstorm Outlook Terms:
  • Marginal Risk:

    Isolated severe thunderstorms are possible.

  • Slight Risk:

    Scattered or short-lived severe thunderstorms are possible.

  • Enhanced Risk:

    Numerous or persistent severe thunderstorms are possible.

  • Moderate Risk:

    Widespread, long-lived, and intense severe thunderstorms are likely.

  • High Risk:

    Widespread, long-lived, and particularly intense severe thunderstorms are expected.

Flood WATCH:

Conditions are favorable for flooding.

 
Flash Flood WARNING:

Life-threatening flooding is detected on radar, indicated by stream gauges, or reported by storm spotters. A flash flood is a flood that occurs very quickly; it is caused by heavy rainfall over a short period of time or from a dam break.

 
Flood WARNING:

Rivers overflowing their banks or water covering a normally dry area. Floods are usually caused by heavy rain over a long period of time, rapidly melting snow, or ice jams.

 
Extreme Heat WARNING:

Heat index 105 degrees or higher, with a minimum heat index of 75 degrees for 48 hours or longer; or heat index of 100 degrees or higher for four consecutive days.

 
Heat ADVISORY:

Heat index 100 degrees or higher; or heat index between 95 and 100 degrees for four consecutive days.