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Mesoscale Discussion 653 |
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MESOSCALE DISCUSSION 0653
NWS STORM PREDICTION CENTER NORMAN OK
0122 AM CDT THU APR 28 2011
AREAS AFFECTED...EXTREME SERN AL...WRN FL PANHANDLE AND SWRN GA
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 280622Z - 280745Z
TRENDS ARE BEING MONITORED FOR A POSSIBLE WW FROM EXTREME SERN
AL...SWRN GA INTO THE WRN FL PANHANDLE.
STORMS ARE DEVELOPING ALONG A PRE-FRONTAL CONFLUENCE BAND FROM THE
WRN FL PANHANDLE INTO SERN AL. ACTIVITY MAY EVENTUALLY SPREAD INTO
SWRN GA. ATMOSPHERE REMAINS MODERATELY UNSTABLE EAST OF DEVELOPING
STORMS WITH 40 KT EFFECTIVE SHEAR. HOWEVER...0-2 KM HODOGRAPHS ARE
RELATIVELY STRAIGHT WITH MODEST STORM RELATIVE HELICITY. TENDENCY
WILL BE FOR LOW LEVEL FLOW TO VEER AND WEAKEN WITH TIME AS PRIMARY
LLJ LIFTS NWD THROUGH THE MID ATLANTIC REGION IN RESPONSE TO VORT
MAX EJECTING THROUGH THE OH VALLEY. THIS COULD SERVE AS A LIMITING
FACTOR FOR A SUSTAINED TORNADO THREAT. NEVERTHELESS...AT LEAST A
MODEST THREAT WILL EXIST FOR STRONG WIND GUSTS AND AN ISOLATED
TORNADO OR TWO WITHIN THE NEXT COUPLE HOURS.
..DIAL.. 04/28/2011
ATTN...WFO...TAE...BMX...MOB...
LAT...LON 30768630 31438596 31888498 31638434 30958459 30568610
30768630
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