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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 09/18/07 1621Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-12 1615Z GG
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LOCATION...CENTRAL TEXAS COASTLINE...
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ATTN WFOS...HGX...CRP...
ATTN RFCS...WGRFC...
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EVENT...STATIONARY CELL OVER CALHOUN COUNTY
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SATELLITE ANALYSIS AND TRENDS...CONVECTION HAS BEEN PULSING ALONG THE
COASTLINE OF CALHOUN COUNTY SINCE 1200Z THIS MORNING WITH LITTLE MOTION.
THIS LITTLE COMPLEX MOST LIKELY DEVELOPED DUE TO INCREASED FRICTIONAL
CONVERGENCE DUE TO THE ONSHORE FLOW WITHIN A LINE OF INCREASED MOISTURE
CONVERGENCE THAT EXTENDS FROM KAUS ACROSS PORT LAVACA INTO THE WESTERN
GULF (SEEN AS A BAND OF ENHANCED LOW LEVEL CU).   THIS BAND IS ROTATING N
TO NE ACROSS C TX AND WEST ACROSS THE WESTERN GULF...SO THE PIVOT POINT IS
AROUND THE AREA OF CONVECTION. UPPER LEVEL PATTERN IS ALSO VERY NICE FOR
INCREASED UVV CONSIDERING THE WELL DEFINED UPPER LOW OVER CENTRAL MEXICO
CONTINUES TO SHIFT WEST AND THE UPPER FLOW IS TURNING AND ACCELERATING
NORTHWARD ALONG THE WESTERN PORTIONS OF THE RIDGE (THE INCREASED
SQUEEZING FROM THE EASTERN TROF IS HELPING THIS ACCELERATION WITH THE
INCREASED GRADIENT).  PW ANALYSIS SHOW VERY MOIST FLUX INTO THE CELL
WITH VALUES OF 2.0" MEASURED IN THE CONVERGENCE BAND PER GOES SOUNDER.
CLOUD TOPS ARE NOT EXCEPTIONALLY COLD EXCEPT THE OVERSHOOTING TOP THAT
HAD DEVELOPED AN SLIGHTLY WARMED OVER THE LAST HOUR... SO IR DERIVED
RATES ARE ESTIMATED AROUND 1.5...THOUGH AN ADDITIONAL .5" WAS SEEN WITH
THE OVERSHOOTING TOP AT 1515Z.  3-3.5" HAVE BEEN MANUALLY ESTIMATED OVER
SW CALHOUN COUNTY JUST NE OF SAN ANTONIO BAY.
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SEE NCEP HPC DISCUSSION AND QPF/S FOR FORECAST.
....NESDIS IS A MEMBER OF 12 PLANET....
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SSD/SAB WEB ADDRESS FOR PRECIP ESTIMATES:
HTTP://WWW.SSD.NOAA.GOV/PS/PCPN/
...ALL LOWER CASE EXCEPT /PS/PCPN/
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LAT...LON 2914 9650 2826 9618 2795 9683 2897 9709
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