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ZCZC NFDSPENES ALL SPENES PRZ000- . SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 06/09/21 1536Z SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404 LATEST DATA USED: GOES-E 1520Z HANNA . LOCATION...PUERTO RICO... . ATTN WFOS...SJU... ATTN RFCS... . EVENT...LOCALIZED HEAVY RAIN THREAT . SATELLITE ANALYSIS AND TRENDS...MORNING VIS IMAGERY IS BEGINNING TO SHOW LOCALIZED CONVECTION DEVELOPING ALONG MESOSCALE BOUNDARIES OVER N PORTIONS OF THE ISLAND WITH INCREASING CU DEVELOPMENT OVER THE REST OF THE ISLAND AS TERRAIN AND SEA BREEZE CIRCULATIONS CONTINUE TO DEVELOP WITH DAY TIME HEATING. MORNING WV IMAGERY IS SHOWING THAT THE LARGE SCALE PATTERN WAS FEATURING A MID LEVEL SHEAR AXIS WITH SEVERAL CIRCULATION CENTERS THAT WAS EXTENDING FROM SUBTROPICAL ATLANTIC OCEAN ALONG ROUGHLY 30N AND THEN SW TO AN UPPER LEVEL LOW CENTERED NEAR 27N/66W. BROAD AND CONFLUENT SW FLOW AHEAD OF THE UPWIND UPPER LOW WAS ALLOWING FOR SHEARING AND WEAK IMPULSES TO LIFT NE FROM PORTIONS OF THE CENTRAL CARIBBEAN OVER E PORTIONS OF PUERTO RICO AND THE VI TO AID IN WEAK SYNOPTIC ASCENT OVER THE REGION. THE ISLANDS WERE ALSO FAVORABLY PLACED WITH RIGHT ENTRANCE REGION OF SUBTROPICAL JET STREAK TO ENHANCE LARGER SCALE ASCENT. MOST RECENT BLENDED PW ANALYSIS WAS SHOWING A PLUME OF DEEPER TROPICAL MOISTURE EXTENDING FROM THE SW CARIBBEAN SEA ENE THROUGH THE NE CARIBBEAN ISLANDS AND BRUSHING PORTIONS OF SE PUERTO RICO. BELIEVE THAT THIS SHOULD ALL FAVOR AN INCREASING THREAT FOR LOCALIZED HEAVY RAIN THROUGHOUT THE DAY ALONG MESOSCALE SEA BREEZE AND TERRAIN CIRCULATIONS AIDED BY WEAK SYNOPTIC ASCENT. RATHER WEAK 0-6KM STORM MOTION VECTORS ON MORNING TJSJ SOUNDING WOULD ALSO SUGGEST SLOW STORM MOTIONS TO THE WEST TO ENHANCE THE LOCALIZED HEAVY RAIN THREAT THROUGHOUT THE DAY. . ....NESDIS IS A MEMBER OF NWSCHAT (NESDISSATELLITEPRECIP).... ....NESDIS IS A MEMBER OF 12 PLANET.... . FOR QUESTIONS AND COMMENTS CONCERNING THE SATELLITE PRECIPITATION MESSAGES AND GRAPHICS PLEASE EMAIL SSDPrecip@noaa.gov . FOR PRECIP MESSAGES AND GRAPHICS ON THE WEB: http://www.ospo.noaa.gov/Products/atmosphere/spe/ . FOR AUTOMATED SATELLITE PRECIPITATION ESTIMATES ON THE WEB: http://www.star.nesdis.noaa.gov/smcd/emb/ff/CONUS.php . LAT...LON 1867 6519 1798 6505 1756 6611 1768 6759 1834 6766 1864 6694 . NNNN |
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