Satellite Precipitation Estimates (TXUS20 KWBC)
Issued by NWS

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000
TXUS20 KNES 200237
SPENES
ZCZC NFDSPENES ALL
SPENES
PRZ000-VIZ000-
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 09/20/17 0237Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404
LATEST DATA USED: RADAR; GOES13 WV WINDS; AMSU/SSMIS 0144; FCS
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LOCATION...PUERTO RICO...
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ATTN WFOS...SJU...SJU...
ATTN RFCS...
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EVENT...HEAVY RAINFALL OVER SAINT CROIX THE USVI AND PUERTO RICO
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SATELLITE ANALYSIS AND TRENDS...THE INFLUENCE OF CONVECTIVE BANDS IS
IMPACTING THE ISLANDS OF SAINT CROIX, SAINT JOHN AND WESTERN PUERTO RICO
AND CENTRAL PUERTO RICO WITH HEAVY RAIN. DANGER FROM THE EFFECTS FLASH
FLOODING CAN BE EXPECTED BASED UPON THE TREND ON SATELLITE AND RADAR
FOR HEAVY TROPICAL RAIN TO DEVELOP OVER THE SAINT CROIX AND SAINT JOHN,
THE VIEQUES AND THE ENTIRE ISLAND OF PUERTO RICO.  THE GOES SATELLITE
DERIVED FIELDS OF UPPER LEVEL DIVERGENCE AND POSITIVE VORTICITY INCLUDING
FAVORABLE LEFT EXIT REGION JET DYNAMICS ASSOCIATED WITH A JET STREAK
FLOWING FROM NORTH TO SOUTH OVER THE DOMINICAN REPUBLIC ALL SUPPORT
VIGOROUS UPDRAFTS IN A MOIST, TROPICAL ENVIRONMENT. REMOTELY SENSED
PRECIPITABLE WATER VALUES EXCEED 2.50 INCHES ACCORDING TO SSMIS/AMSU
MOISTURE ESTIMATES. THE SJU 00Z SOUNDING INDICATED CAPE NEAR 1900 J/KG
AND A LIFTED INDEX OF -4C WHICH WILL PROVIDE ENERGY AND BUOYANT LIFT WITH
AN APPROACHING HURRICANE.  EXTREMELY HEAVY RAINFALL CAN BE EXPECTED TO
DEVELOP BASED UPON THE CURRENT TRENDS.
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AN ANNOTATED SATELLITE GRAPHIC SHOWING THE HEAVY PRECIPITATION
THREAT AREA SHOULD BE AVAILABLE ON THE INTERNET ADDRESS LISTED
BELOW IN APPROXIMATELY 10-15 MINUTES.
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SHORT TERM OUTLOOK VALID 0230-0930Z...HIGH CONFIDENCE FACTOR
IN SHORT TERM OUTLOOK...DANGEROUS CONDITIONS ARE IMMINENT WITH AN
EXTREMELY HIGH POTENTIAL FOR FLASH FLOODING TO DEVELOP AS RAIN ASSOCIATED
WITH HURRICANE JOSE MAKES IT APPROACH TH PUERTO RICO AND THE USVI. AREAS
IN HIGHER TERRAIN WILL BE SUSCEPTIBLE TO THE MOST DANGEROUS CONDITIONS AS
TORRENTIAL RAINS INUNDATE PUERTO RICO AND USVI ISLANDS OF SAINT JOHN AND
SAINT CROIX. VALLEYS OF CREEKS, STREAMS AND RIVERS ARE IN DANGER AS WELL.
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....NESDIS IS A MEMBER OF NWSCHAT (NESDISSATELLITEPRECIP)....
....NESDIS IS A MEMBER OF 12 PLANET....
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FOR QUESTIONS AND COMMENTS CONCERNING THE SATELLITE
PRECIPITATION MESSAGES AND GRAPHICS PLEASE EMAIL
SSDPrecip@noaa.gov
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FOR PRECIP MESSAGES AND GRAPHICS ON THE WEB:
http://www.ospo.noaa.gov/Products/atmosphere/spe/
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FOR AUTOMATED SATELLITE PRECIPITATION ESTIMATES ON THE WEB:
http://www.star.nesdis.noaa.gov/smcd/emb/ff/CONUS.php
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LAT...LON 1799 6552 1713 6443
2131 6723 1951 6657 1749 6624 1595 6614
1996 6539 1860 6593
1781 6672 1740 6671 1630 6669
1924 6752 1923 6752 1924 6374 1722 6403 1723 6799

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