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Mesoscale Discussion 175 |
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MESOSCALE DISCUSSION 0175
NWS STORM PREDICTION CENTER NORMAN OK
0507 PM CST THU MAR 03 2016
AREAS AFFECTED...SRN MS...SW AL...FAR WRN FL PANHANDLE
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 032307Z - 040130Z
PROBABILITY OF WATCH ISSUANCE...20 PERCENT
SUMMARY...AN ISOLATED THREAT FOR HAIL AND STRONG GUSTY WINDS WILL
LIKELY CONTINUE FOR A FEW MORE HOURS. THE THREAT MAY SPREAD INTO SW
AL EARLY THIS EVENING. THE SEVERE THREAT IS NOT EXPECTED TO PERSIST
MUCH BEYOND 0130Z AND FOR THIS REASON...WW ISSUANCE IS NOT
ANTICIPATED ACROSS THE REGION.
DISCUSSION...THE LATEST WATER VAPOR IMAGERY SHOWS A SHORTWAVE TROUGH
MOVING ACROSS THE LOWER MS VALLEY. AN ASSOCIATED 70 TO 85 KT
MID-LEVEL JET IS LOCATED IN SRN AR AND NRN LA. A CLUSTER OF STRONG
TO POTENTIALLY SEVERE THUNDERSTORMS IS LOCATED IN THE EXIT REGION OF
THE MID-LEVEL JET. THIS FEATURE WILL PROVIDE LIFT NECESSARY TO
CONTINUE THUNDERSTORM DEVELOPMENT OVER THE THE NEXT FEW HOURS. THE
WARM SECTOR IS SMALL AND IS CHARACTERIZED BY MLCAPE OF 500 TO 1000
J/KG MAINLY OVER SRN LA...SRN MS AND FAR SW AL. THUNDERSTORMS WILL
MOVE ESEWD ALONG THE INSTABILITY GRADIENT EARLY THIS EVENING.
CONCERNING THE SHEAR ENVIRONMENT...FORECAST SOUNDINGS FROM JACKSON
MS TO MOBILE AL AT 00Z SHOW 70 TO 80 KT OF O-6 KM SHEAR ALONG WITH
40 TO 45 KT OF FLOW AT 850 MB. THIS MAY BE ENOUGH TO KEEP STORMS
MARGINALLY SEVERE FOR A COUPLE MORE HOURS. BOWING LINE SEGMENTS MAY
BE ACCOMPANIED WITH MARGINALLY SEVERE WIND GUSTS. HAIL WILL ALSO BE
POSSIBLE WITH THE STRONGER CORES.
..BROYLES/WEISS.. 03/03/2016
ATTN...WFO...BMX...MOB...JAN...LIX...
LAT...LON 32208919 32158996 31839030 31259028 30998967 30668750
30888673 31318659 31828678 32038774 32208919
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