ALAGAFLA (AL/GA/FL) Hail threat today
Posted: Fri Mar 14, 2003 2:37 pm
Sorry about my abbreviations!
MESOSCALE DISCUSSION 0248
NWS STORM PREDICTION CENTER NORMAN OK
1158 AM CST FRI MAR 14 2003
AREAS AFFECTED...SRN AL / FL PNHDL / SWRN GA
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 141758Z - 142000Z
TSTMS ARE EXPECTED TO DEVELOP WITHIN THE NEXT COUPLE OF HOURS.
HAIL WILL BE THE PRIMARY THREAT AND A WW MAY BE REQUIRED.
LATEST MESOANALYSIS SHOWS A WEAK SURFACE LOW S OF MOB BAY WITH AN
ATTENDANT WARM FRONT/DIFFERENTIAL HEATING ZONE EXTENDING FROM N
OF PNS TO MAI TO N OF JAX. LATEST VISIBLE SATELLITE DATA SHOW
CUMULUS FIELD DEVELOPING NE OF SURFACE LOW OVER THE WRN FL PNHDL
INTO SRN AL. ALTHOUGH DEWPOINTS ARE CURRENTLY ONLY IN THE UPPER
50S TO LOWER 60S...STRONG INSOLATION AND STEEP-MID LEVEL LAPSE
RATES AHEAD OF MID-LEVEL LOW OVER SRN MS HAVE CONTRIBUTED TO A
MODERATELY UNSTABLE AIRMASS WITH MLCAPES APPROACHING 1000-1500
J/KG.
CONTINUED DAYTIME HEATING IN COMBINATION WITH INCREASING FORCING
FOR LARGE-SCALE ASCENT AHEAD OF MID-LEVEL LOW...SHOULD ALLOW
TSTMS TO DEVELOP WITHIN THE NEXT COUPLE OF HOURS. ALTHOUGH
LOW-LEVEL WIND FIELDS WILL REMAIN RATHER WEAK...STRENGTHENING
FLOW ABOVE 6 KM AGL SHOULD SUPPORT ISOLATED/SCATTERED ORGANIZED
TSTMS. RELATIVELY COOL TEMPERATURES ASSOCIATED WITH MID-LEVEL
CIRCULATION --IE -16 TO -17 C AT 500 MB-- WILL SUPPORT PRIMARILY
A HAIL THREAT. WW MAY BE REQUIRED THIS AFTERNOON.
MESOSCALE DISCUSSION 0248
NWS STORM PREDICTION CENTER NORMAN OK
1158 AM CST FRI MAR 14 2003
AREAS AFFECTED...SRN AL / FL PNHDL / SWRN GA
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 141758Z - 142000Z
TSTMS ARE EXPECTED TO DEVELOP WITHIN THE NEXT COUPLE OF HOURS.
HAIL WILL BE THE PRIMARY THREAT AND A WW MAY BE REQUIRED.
LATEST MESOANALYSIS SHOWS A WEAK SURFACE LOW S OF MOB BAY WITH AN
ATTENDANT WARM FRONT/DIFFERENTIAL HEATING ZONE EXTENDING FROM N
OF PNS TO MAI TO N OF JAX. LATEST VISIBLE SATELLITE DATA SHOW
CUMULUS FIELD DEVELOPING NE OF SURFACE LOW OVER THE WRN FL PNHDL
INTO SRN AL. ALTHOUGH DEWPOINTS ARE CURRENTLY ONLY IN THE UPPER
50S TO LOWER 60S...STRONG INSOLATION AND STEEP-MID LEVEL LAPSE
RATES AHEAD OF MID-LEVEL LOW OVER SRN MS HAVE CONTRIBUTED TO A
MODERATELY UNSTABLE AIRMASS WITH MLCAPES APPROACHING 1000-1500
J/KG.
CONTINUED DAYTIME HEATING IN COMBINATION WITH INCREASING FORCING
FOR LARGE-SCALE ASCENT AHEAD OF MID-LEVEL LOW...SHOULD ALLOW
TSTMS TO DEVELOP WITHIN THE NEXT COUPLE OF HOURS. ALTHOUGH
LOW-LEVEL WIND FIELDS WILL REMAIN RATHER WEAK...STRENGTHENING
FLOW ABOVE 6 KM AGL SHOULD SUPPORT ISOLATED/SCATTERED ORGANIZED
TSTMS. RELATIVELY COOL TEMPERATURES ASSOCIATED WITH MID-LEVEL
CIRCULATION --IE -16 TO -17 C AT 500 MB-- WILL SUPPORT PRIMARILY
A HAIL THREAT. WW MAY BE REQUIRED THIS AFTERNOON.