jlauderdal
(Weather Hobbyist)
Tue Aug 31 2004 10:29 AM
Re: GFS Data Question

Quote:

Thanks Jason, its just some meteorolgists in SE Florida are saying their may have been issues. It will be interesting to see if those models trend to the left again in the 12z and 18z runs., like they did yesterday.




ULL discussion for Miami NWS. Its moving to the west folks.

SOUTH FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIAMI FL
1000 AM EDT TUE AUG 31 2004

.UPDATE...LATEST SURFACE ANALYSIS SHOWS TROUGH EXTENDING FROM THE NE
FL COAST SW THROUGH EAST CNTRL FL...ACROSS LAKE OKEE AND INTO THE SW
GULF...ALBEIT SUBTLE...WITH 88D AND SATELLITE LOOP SHOWING SOME
CONVECTIVE ACTIVITY ALONG IT OFF THE NE FL AND SW FL COASTS. AT THE
UPR LVLS...MOST PROMINENT FEATURE IS UPR LVL LOW ACROSS THE NW
BAHAMAS WHICH CONTINUE TO TRACKS WEST. 12Z SNDG PWAT...WHICH IS ALSO
CONFIRMED BY GPSMET RETRIEVALS IS RUNNING AROUND 1.9 TO 2 INCHES
THIS MORNING. THIS IS BETTER THAN YESTERDAY. HOWEVER...WATER VAPOR
LOOP SHOWS A SLIGHTLY DRIER AIR LAYER WEST OF THE UPR LOW ACROSS THE
ATLANTIC COASTAL WATERS. SUBSIDENCE ASSOCIATED WITH THIS FEATURE HAS
BEEN DISSIPATING CONVECTIVE ACTIVITY DEVELOPING ACROSS THE ATLANTIC
WATERS THIS MORNING. WITH THE STEERING FLOW FROM THE SE AROUND 5
KNOTS PER 12Z SNDG...AND UPR LVL FEATURE TRACKING WEST...LOOKS LIKE
BEST CHANCES OF PRECIPITATION SHOULD BE IN THE INTERIOR FOR TODAY
AND JUST INLAND OFF THE SW FLORIDA COAST. THIS GRADIENT IS CURRENTLY
REFLECTED IN THE FCST SO PLAN NO CHANGES. 12Z CONVECTIVE PARAMETERS
CAME UP WITH A CAPE OF 4180..MODIFIED FOR AFTERNOON INLAND HIGHS OF
AROUND 92...LI OF -8...AND VERTICAL TOTALS OF AROUND 24. SO TODAY
STORMS HAVE A SLIGHTLY BETTER CHANCE OF ONE OR TWO BEING STRONGER
THAN USUAL WITH GUSTS IN EXCESS OF 35 MPH AND SMALL
HAIL...PARTICULARLY INLAND.



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