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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 06/20/08 1303Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-12 1245Z         CW
NOAA AMSU: 0953Z   DMSP SSMI:0926Z
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LOCATION...PUERTO RICO...
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ATTN WFOS...SJU...
ATTN RFCS...
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EVENT...INCREASING THREAT OF HVY RAINS FROM APPROACHING TROPICAL WAVE
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SATELLITE ANALYSIS AND TRENDS...LATEST STLT IMAGERY SHOWS THE NW EDGE OF
THE CLOUD SHIELD ASSOCIATED WITH A WESTWARD MOVING TROPICAL WAVE LOCATED
AT 17N/64W.  BASED ON THE CURRENT WWD TRAJECTORY OF THIS TROPICAL WAVE
THE MAJORITY OF THE CONVECTION AND HVY RAINS SHOULD PASS BY TO THE
SOUTH..HOWEVER THIS DOES NOT RULE OUT THE POTENTIAL FOR HVY RAINS FROM
THE NORTHERN FRINGE OF THIS WAVE TO IMPACT THE ISLAND LATER TODAY INTO
TONIGHT.  INCREASED LLVL MOISTURE WILL ALSO ACCOMPANY THIS WAVE AS 0926Z
SSMI AND 0953Z AMSU MICROWAVE PASSES BOTH INDICATE MAX PW VALUES OF 2.0"
ABOUT 142 KM SW OF PR.  AREAL-AVERAGED RAIN RATES ANALYZED FROM AMSU DATA
SUGGEST BETWEEN 0.5-1.0"/HR.  OVER THE LAST HR CLOUD TOPS HAVE COOLED MOST
ALONG THE NORTHERN EDGE AND CLOUD TOP TEMPS ARE NOW AROUND -70C..WHICH
ONLY HEIGHTENS THE CHANCES OF HVY RAINS MAKING IT ONSHORE.  AS CONVECTION
SPREADS E-W ACROSS THE ISLAND GREATEST THREAT SHOULD BE LOCALIZED HVY
RAINS WITH SOME AREAS POTENTIALLY SEEING RATES UP TO 1.0"/HR AT TIMES.
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PLEASE SEE WEB ADDRESS BELOW FOR STLT GRAPHIC IN ABOUT 10 MINS.
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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 1866 6748 1860 6550 1770 6546 1774 6735
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