Satellite Precipitation Estimates (TXUS20 KWBC)
Issued by NWS

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860
TXUS20 KNES 181050
SPENES
ZCZC NFDSPENES ALL
SPENES
VIZ000-PRZ000-
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 11/18/17 1050Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404
LATEST DATA USED: GOES 13 IR 1030Z; GLOBAL HYDRO ESTIMATOR; FCS
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LOCATION...PUERTO RICO...
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ATTN WFOS...SJU...
ATTN RFCS...
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EVENT...POTENTIAL HEAVY RAINFALL
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SATELLITE ANALYSIS AND TRENDS...THE LATEST ANALYSIS OF SATELLITE IMAGERY
INDICATES CONVECTIVE DEVELOPMENT OVER THE ISLAND OF PUERTO RICO. MORE
STORMS FORMING UPSTREAM TO THE SOUTHWEST OF PUERTO RICO WILL BE MOVING
TOWARD THE EAST AND NORTHEAST AND WILL IMPACT PUERTO RICO WITH MODERATE
TO HEAVY RAINFALL CAPABLE OF PRODUCING FLASH FLOODING.  GLOBAL HYDRO
ESTIMATOR HOURLY RAINFALL RATES ARE AS MUCH AS TWO INCHES PER HOUR FOR
AERIAL AVERAGED RATES AND EXCEED AN INCH PER HOUR OVERALL.  THE UPPER
LEVEL WIND PATTERN IN THE REGION DOES INDICATE A PATTERN OF DIVERGENCE
ALOFT WITH A JET STREAK NORTHEAST OF PUERTO RICO POSITIONED WITH THE
RIGHT ENTRANCE AREA OF THE SPEED MAX GENERATING DYNAMIC LIFT. DIFFLUENT
WIND VECTORS AT 400MB FAVORABLE FOR MASS EVACUATION ALOFT WILL PROVIDE
UPWARD MOTIONS IN SUPPORT OF STORM DEVELOPMENT.
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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 1000-1400Z...MEDIUM CONFIDENCE FACTOR
IN SHORT TERM OUTLOOK...MODERATE TO HEAVY RAINFALL WILL BE POTENTIALLY
AFFECTING PUERTO RICO IN THE NEXT FEW HOURS.  URBAN RUNOFF AND SMALL
STREAM OVERFLOW WILL BE THE PRIMARY THREAT FOR FLASH FLOODING WITH
HEAVIER CONVECTIVE CELLS. RAINFALL RATES OF AN INCH AND A HALF PER HOUR
CAN BE EXPECTED.
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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 1876 6746 1875 6746 1876 6444 1764 6456 1765 6767

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