CASILIST : Moderate Risk Of Severe Storms In SW CASI Area Today
From: J <j{at}weatherwatchers.org>
Date: Thu, 07 May 1998 06:45:52 -0400

There is a Moderate Risk of Severe Storms today in Northern GA and the Westernmost counties of the Carolinas. A Slight Risk of Severe Storms is in effect for the rest of the Southern CASI area excluding Florida. For a maps of the SPC's official risks and other companies estimations of the locations of severe weather see: http://casi.simplenet.com/j/oldsite/wx/severe.html For a 30-minute radar shot of the affected area including storm tops, forecast movement, and watch boxes, see http://www.intellicast.com/weather/mgm/radsum/ Severe Thunderstorms have already spread into Northern Alabama and Southern Georgia. The threat today will be Supercells with tornadoes. In fact as I look at the Intellicast image at 6:30 this morning a TVS (Tornadic Vortex Signature) has already been detected in Northern Alabama. Please be aware that severe weather could affect you if you live in these areas today. And remember, if you witness strong weather, fill out the StormForm at http://www.weatherwatchers.org/stormform/ Here are the specifics from the SPC: ...SOUTHEASTERN STATES... SOUTHERLY/SOUTHWESTERLY LOW-LEVEL WINDS WILL INCREASE OVERNIGHT ALLOWING DEWPOINTS IN THE UPPER 60S TO SPREAD INTO THE SOUTHEASTERN STATES. THIS INCREASING MOISTURE AND DAYTIME HEATING SHOULD RESULT IN AIRMASS OVER THIS REGION BECOMING MODERATELY UNSTABLE BY MID- AFTERNOON. BELIEVE CURRENT THUNDERSTORMS SHOULD INTENSIFY AS THEY MOVE INTO THIS UNSTABLE AIRMASS ACROSS GEORGIA...SOUTH CAROLINA AND SOUTHERN PORTIONS OF NORTH CAROLINA. LATEST MODELS SUGGEST VERTICAL WIND PROFILES OVER THIS REGION WILL SUPPORT SEVERE THUNDERSTORM DEVELOPMENT WITH THE POSSIBILITY OF SUPERCELLS AND A FEW TORNADOES. BEHIND THIS INITIAL AREA OF THUNDERSTORMS...AIRMASS IS EXPECTED TO ONCE AGAIN DESTABILIZE. TEMPERATURES IN THE 80S AND DEWPOINTS APPROACHING 70 DEGF SHOULD RESULT IN MODERATELY/VERY UNSTABLE AIRMASS FROM ALABAMA AND MIDDLE TENNESSEE INTO GEORGIA. IN ADDITION...MODELS INDICATE MID-LEVEL DRY INTRUSION WILL MOVE ACROSS REGION. ADDITIONAL THUNDERSTORMS WILL DEVELOP ALONG SOUTHEASTWARD MOVING COLD FRONT AND ANY OUTFLOW BOUNDARY FROM MORNING THUNDERSTORMS. WESTERLY/NORTHWESTERLY MID-LEVEL WINDS ARE EXPECTED TO INCREASE TO 80 KT OVER THIS AREA. THESE STRONG WINDS...COMBINED WITH SOUTHERLY/ SOUTHWESTERLY LOW-LEVEL WINDS AND INSTABILITY...SHOULD RESULT IN THE DEVELOPMENT OF SUPERCELLS AND TORNADOES. -- ============================================================== Jesse Ferrell - Meteorologist/Web Dev. - j{at}weatherwatchers.org Central Atlantic Storm Investigators - www.weatherwatchers.org "And here a twister comes... here comes the twister." --Talking Heads || ICQ No. 136862 ||