This is an experimental product.

  • Day 1 Convective Outlook

  • Current Prog Chart

  • National Radar

  • SPC Storm Reports

  • RSS SPC PDS RSS Feed:

    • SPC PDS Tornado Watch 62 March 2, 2012
      URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 62 NWS STORM PREDICTION CENTER NORMAN OK 420 PM EST FRI MAR 2 2012 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF EASTERN KENTUCKY SOUTHEAST OHIO WESTERN VIRGINIA WESTERN AND CENTRAL WEST VIRGINIA EFFECTIVE THIS FRIDAY AFTERNOON FROM 420 PM UNTIL MIDNIGHT EST. ...THIS IS […]
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National Forecast Charts


Today's Forecast
Saturday Feb 25, 2012
Tomorrow's Forecast
Sunday Feb 26, 2012
Day 3 Forecast
Monday Feb 27, 2012
Available Image Formats English:    GIF      PDF*  
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The UV Alert product (see graphic below) is a joint venture between the NWS and the EPA to provide guidance for areas around the contiguous 48 states that are expected to experience well above normal UV radiation levels during the mid-day period. If you are within a UV Alert region extra precautions should be taken to protect oneself from the sun's UV radiation. The graphic below shows areas of 'near or below' climatological levels of UV radiation for that particular day (white), or areas expected to be 'above normal' UV conditions (yellow), and areas expected to be 'well above normal' conditions (red). The later areas are considered to be within a UV Alert region.



Current UV Index Forecast Map
(Click on image to enlarge)


The UV Alert is based statistically upon a locale's daily climatological mean UV Index and its historical variability for that day (standard deviation). Initially, for a locale to qualify to be within a UV Alert region the UV Index must be "High" or 6 and above. If the UV Index is greater than the locale's climatological mean plus one standard deviation it is considered to be 'above normal'. If the UV Index is greater than the locale's climatological mean plus TWO standard deviations it is considered to be 'well above normal' and placed within the UV Alert region.

EPA Seal
Click on the EPA logo to obtain additional UV Index information via the EPA's SunWise web site

Weather Conditions

Storm Chasers (BlueWolf)