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ZCZC NFDSPENES ALL SPENES HIZ000- . SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 03/17/21 0025Z SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404 LATEST DATA USED: GOES 17 2340Z;AMSU;RADAR 0000Z;MSL . LOCATION...ISLANDS OF OAHU AND EAST... . ATTN WFOS...HFO... ATTN RFCS...AKRFC... . EVENT...ISOLATED FLASH FLOODING OVER EASTERN HAWAII . SATELLITE ANALYSIS AND TRENDS...LATEST VISIBLE SATELLITE DATA SHOWS WIDESPREAD SHOWERS AND THUNDERSTORMS OVER MOST OF THE ISLANDS WITH THE MOST ORGANIZED CONVECTION OVER THE BIG ISLAND. A LL MESOSCALE CIRCULATION EMBEDDED WITHIN NORTHEASTERLY TRADE WINDS IS ALSO NOTABLE IN VISIBLE IMAGERY MOVING INTO NORTHWESTERN MAUI. FASTER UL FLOW IS ENTERING THE REGION FROM THE SOUTHWEST WITH ITS OUTER PERIPHERY ABOUT 100NM S OF THE BIG ISLAND. AMSU PWATS ARE AROUND 1.75 IN WITH LOWER AMOUNTS MOVING IN FROM THE NORTH ASSOCIATED WITH HIGH PRESSURE. ML FLOW IS FROM THE SOUTHWEST WITH THE GREATEST MOISTURE AND INSTABILITY MOVING OVER THE CENTRAL ISLANDS ASSOCIATED WITH A SHORTWAVE OVER THE REGION. . SHORT TERM OUTLOOK VALID 0030-1200Z...MEDIUM CONFIDENCE FACTOR IN SHORT TERM OUTLOOK...WIDESPREAD SHOWERS WITH EMBEDDED ISOLATED THUNDERSTORMS ARE NOTABLE IN THE LATEST RADAR IMAGERY. A SHORTWAVE OVER THE AREA COULD PROVIDE FORCING FOR SCATTERED HEAVIER SHOWERS AND THUNDERSTORMS AS IT PASSES THROUGH. WITH PWATS CURRENTLY AROUND 1.75 THROUGHOUT THE AREA AN ISOLATED FLOOD THREAT IS POSSIBLE ESPECIALLY OVER WINDWARD REGIONS AND HIGHLY SATURATED GROUNDS WHERE HEAVIER PRECIPITATION HAS PREVIOUSLY FALLEN . ....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 2233 16130 2230 15837 2233 15837 1891 15251 1885 15562 . NNNN |
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