Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 251620
SWOMCD
SPC MCD 251620
GAZ000-FLZ000-251745-

MESOSCALE DISCUSSION 0453
NWS STORM PREDICTION CENTER NORMAN OK
1120 AM CDT SAT APR 25 2015

AREAS AFFECTED...PORTIONS OF SRN GA AND NRN FL

CONCERNING...TORNADO WATCH 110...

VALID 251620Z - 251745Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 110 CONTINUES.

SUMMARY...THE SEVERE THREAT ACROSS SOUTHERN PORTIONS OF WW 110 MAY
SLOWLY INCREASE THROUGH THE EARLY AFTERNOON.

DISCUSSION...AN ONGOING CLUSTER OF THUNDERSTORMS HAS STRUGGLED TO
ORGANIZE THIS MORNING ACROSS SRN GA/NRN FL...AS IT BECOMES
INCREASINGLY REMOVED FROM LARGE SCALE FORCING TO THE NW.
HOWEVER...RECENT RADAR TRENDS SUGGEST ADDITIONAL CONVECTION FIRING
ALONG AN OUTFLOW BOUNDARY FROM TALLAHASSEE TO MADISON FL MAY
CONTINUE TO SLOWLY STRENGTHEN IN THE SHORT TERM. DIURNAL HEATING S
OF THIS BOUNDARY SHOULD INCREASE MLCAPE VALUES ABOVE 1000 J/KG AS
TEMPERATURES WARM INTO THE 80S ACROSS NRN FL. A VERY MOIST LOW-LEVEL
AIRMASS...CHARACTERIZED BY SFC DEWPOINTS IN THE LOW TO MID
70S...REMAINS IN PLACE ACROSS THIS AREA. GPS PW ESTIMATES SUGGEST
ADDITIONAL LOW TO MIDLEVEL MOISTURE IS MOVING NWD FROM THE GULF AND
OVER NRN FL...WHICH SHOULD HELP FURTHER DESTABILIZE THE ATMOSPHERE.
GIVEN VEERING WINDS WITH HEIGHT AND STRONG MIDLEVEL FLOW...AROUND 60
KT AT 500 MB PER THE 12Z SOUNDING FROM TAE...THUNDERSTORMS ACROSS
THE SRN PORTIONS OF WW 110 SHOULD BE CAPABLE OF ALL SEVERE HAZARDS
THROUGH THE EARLY AFTERNOON.

..GLEASON/MEAD.. 04/25/2015

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...JAX...TAE...

LAT...LON   29888313 30048499 30368505 31058451 31148403 31128267
            31058221 30548234 29888261 29888313



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