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ZCZC NFDSPENES ALL SPENES HIZ000- . SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 02/28/21 2340Z SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404 LATEST DATA USED: GOES 17 2320Z; RADAR 2337Z; AMSU PW 2310; MESONET;MSL . LOCATION...ISLAND OF HAWAII (BIG ISLAND) AND MAUI... . ATTN WFOS...HFO... ATTN RFCS...AKRFC... . EVENT...FLASH FLOODING HAWAII AND MAUI ISLANDS . SATELLITE ANALYSIS AND TRENDS...THE LATEST G17 VISIBLE SATELLITE IMAGERY DEPICTS LL EASTERLIES DRAWING IN SEVERAL BATCHES OF SHOWERS WITH A SUBTLE CYCLONIC FEATURE DUE WEST OF THE BIG ISLAND AND SOUTH OF MAUI. THIS FEATURE APPEARS TO BE AIDING IN THE FUNNELING OF LL MOISTURE INTO MAUI, WITH WINDWARD REGIONS RECEIVING THE BRUNT OF THE ADVECTION. PWATS VARY FROM 1.5 INCHES AT THE SOUTHEASTERN PORTIONS OF THE BIG ISLAND TO AROUND AN INCH FROM MAUI NORTHWESTWARD. HIGHEST PWATS (APPROACHING 2 INCHES) REMAIN WELL SOUTH OF THE ISLAND CHAIN, LIKELY ASSOCIATED WITH A LARGE WAVE OF ML MOISTURE IN THAT REGION. CURRENT RADAR SHOWS SHOWERS CONTINUING TO MOVE ACROSS THE AREA WITH WINDWARD REGIONS LIKELY RECEIVING THE HEAVIEST RAINFALL. . SHORT TERM OUTLOOK VALID 0000-0800Z...MEDIUM CONFIDENCE FACTOR IN SHORT TERM OUTLOOK...RECENT RADAR TRENDS SHOWS WIDESPREAD RAINFALL THROUGHOUT THE ISLAND CHAIN, WITH THE MOST PERSISTENT SHOWERS OVER EASTERN PORTIONS OF THE BIG ISLAND AS WELL AS WINDWARD REGIONS OF MAUI, MOLOKAI, AND OAHU. WITH MUCH OF THE GROUND ALREADY SATURATED FROM THE ONGOING RAINFALL FLASH FLOODING IS POSSIBLE WITH THE HIGHEST LIKELIHOOD IN WINDWARD REGIONS OF THE BIG ISLAND AND MAUI THAT HAVE RECEIVED THE MOST RAINFALL OVER THE PAST 24-HRS AS WELL AS LOW-LYING AREAS WHERE RUNOFF AND RIVER FLOODING IS LIKELY. LOCALIZED FLOODING CAN NOT BE RULED OUT ON OTHER ISLANDS SUCH AS OAHU IF SIGNIFICANT TRAINING OR CONVECTION SETS ITSELF UP OVER THOSE REGIONS. . ....NESDIS IS A MEMBER OF NWSCHAT (NESDISSATELLITEPRECIP).... ....NESDIS IS A MEMBER OF 12 PLANET.... . FOR QUESTIONS AND COMMENTS CONCERNING THE SATELLITE PRECIPITATION MESSAGES WHICH DISCONTINUE 12 APRIL 2021 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 2229 15823 2226 15823 1878 15284 1875 15551 2229 16099 . NNNN |
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