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ZCZC NFDSPENES ALL SPENES HIZ000- . SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 03/17/20 2109Z SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404 LATEST DATA USED: GOES WEST(GOES 17); AMSU 1920Z; SSMIS/AMSU PW/RAIN RATES; FCS . LOCATION...HAWAII... . ATTN WFOS...HFO... ATTN RFCS...AKRFC... . EVENT...TORRENTIAL RAINFALL RESULTING IN FLASH FLOODING . SATELLITE ANALYSIS AND TRENDS...SATELLITE IMAGERY SHOWS A WIDE ARE OF UPPER LEVEL DIFFLUENCE, COOLING STORM TOPS ON IR, AS A KONA LOW APPROACHES THE HAWAIIAN ISLANDS WITH TORRENTIAL RAINFALL NOW REACHING OAHU AND MOVING TOWARDS THE CENTRAL HAWAIIAN ISLANDS OF MOLOKAI AND LANAI. UPSTREAM SATELLITE DERIVED RAINFALL RATES ARE CLOSE TO 1.50 INCHES PER HOUR AND PW QUANTITY ESTIMATES ARE 2.0 INCHES OVER OAHU WITHIN THE CHANNEL OF HIGHEST PW ALONG AN AXIS WITH TROPICAL 2.4 INCH PW AMOUNTS UPSTREAM OF HAWAII. SURFACE MOISTURE CONVERGENCE FIELDS ARE STRENGTHENING IN ADVANCE OF THE STORM CENTER WHICH HAS YET TO REACH THE ISLANDS. STRONG UNIDIRECTIONAL LOWER/UPPER LEVEL WINDS FROM THE SOUTH TRANSPORTING COPIOUS AMOUNTS OF WATER VAPOR TOWARDS THE ENTIRE HAWAIIAN ISLAND CHAIN. SATELLITE DATA SHOWS BETTER MOISTURE QUANTITIES THAT HAVE YET TO REACH THE HAWAIIAN ISLANDS. STRONG MOISTURE FLUX UP STEEP MOUNTAINOUS TERRAIN WILL RESULT IN TORRENTS OF TROPICAL RAIN WITH EXTREMELY HIGH RAINFALL RATES AFFECTING THE ENTIRE ISLAND CHAIN BEFORE KONA LOW DEPARTS. . AN ANNOTATED SATELLITE GRAPHIC SHOWING THE HEAVY PRECIPITATION THREAT AREA SHOULD BE AVAILABLE ON THE INTERNET ADDRESS LISTED BELOW IN APPROXIMATELY 10-15 MINUTES. . SHORT TERM OUTLOOK VALID 2100-0100Z...HIGH CONFIDENCE FACTOR IN SHORT TERM OUTLOOK...LOCAL RADAR OVER THE WESTERN AND NORTHERN ISLANDS OF HAWAII SHOWS ALIGNING BANDS OF EXTREMELY HEAVY RAINFALL MOVING SOUTH TO NORTH WITH A VERY- SLOWLY ADVANCING STORM CENTER FROM WEST TO EAST. EXPECT FLASH FLOODING PRODUCING RAINFALL WITH INTENSE DOWNPOURS. . ....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 2244 16139 2170 16045 1884 15615 1882 15263 2242 15836 2238 16141 . NNNN |
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