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ZCZC NFDSPENES ALL SPENES HIZ000- . SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 07/27/20 0115Z SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404 LATEST DATA USED: GOES 17 01OOZ; HYDROESTIMATOR; AMSU; RADAR 0111Z; FCS . LOCATION...HAWAII... . ATTN WFOS...HFO... ATTN RFCS...AKRFC... . EVENT...HURRICANE DOUGLASS HEAVY RAINFALL . SATELLITE ANALYSIS AND TRENDS...THE IMPACTING OF HURRICANE DOUGLASS ON THE HAWAIIAN ISLANDS NOW MOVING ALONG THE CENTRAL HAWAIIAN ISLANDS AS THE STORMS MOVEMENT TO THE WEST NORTHWEST BRINGS HEAVY RAINFALL POTENTIAL. UPPER AIR RAOB ANALYSIS SHOWS H850 WINDS FROM THE SOUTH TOWARDS THE BIG ISLAND AND FROM THE SOUTHEAST TOWARDS LIHUE AS MOISTURE IMPACTING MOUNTAINOUS TERRAIN ON WINDWARD FACING SLOPES GENERATES LIFT OF TROPICAL AIR WITH H850 THETA E QUANTITIES 334-348K AND SATELLITE DERIVED PW 2-2.20 INCHES FROM AMSU/SSMIS ESTIMATES, AND HYDROESTIMATOR DATA SHOWING HIGHEST ESTIMATE VALUES NORTHEAST OF MOLOKAI WITH A WEST NORTHWEST TREND ALONG THE NORTHEAST SIDE OF THE HAWAIIAN ISLANDS. 21.6N 156.4W, THE LATEST NHC POSITION OF HURRICANE DOUGLASS, WITH AN EXPECTED PATH ALONG THE NORTHEAST PERIPHERY OF THE CENTRAL/WESTERN HAWAIIAN ISLANDS, BRINGS AN OPPORTUNITY FOR EXCESSIVE RAINFALL RESULTING IN FLASH FLOODING, AS WELL AS THE BIG ISLAND AND MAUI AS SOUTHERLY TRANSPORT OF WATER VAPOR WITHIN THE TRAILING BANDS OF HURRICANE DOUGLASS FORCES MOISTURE UP THE STEEP SOUTH FACING SLOPES OF THE MOUNTAINS. SATELLITE IMAGERY FROM GOES 17 WEST SHOWS GROWING CONVECTIVE THUNDERSTORM TOPS ON VISIBLE IMAGERY OFFSHORE OF THE ISLAND OF OAHU AND COOLING TOPS ON IR MOVING IN FROM THE NORTHEAST WITH TRAILING BANDS OF CLOUDS STREAMING FROM THE SOUTH AND SOUTHEAST INTO HAWAII ISLAND. MOST RECENT IR IMAGERY SUGGESTS STRENGTHENING BECAUSE COOLER TOPS ARE FORMING AROUND THE NORTHWEST PORTION OF DOUGLASS AS SOME OUTER BANDS PUSH SOUTHEASTWARD TOWARDS OAHU AND KAUAI CURRENTLY SHOWING SOME FURTHER DEVELOPMENT. THE CENTER OF DOUGLASS, SHOWING A WARMER CENTER, MAY SHOW A MORE DISTINCT EYE TRYING TO FORM BASED ON THE . SHORT TERM OUTLOOK VALID 0115-0615Z...HIGH CONFIDENCE FACTOR IN SHORT TERM OUTLOOK...HURRICANE DOUGLASS IS CONTINUING ON A PATH ALONG THE NORTHEAST PERIPHERY OF THE HAWAIIAN ISLAND CHAIN BRINGING HEAVY RAINFALL FOR THE ENTIRE STATE. FLASH FLOODING IN HAWAII IS LIKELY WITH THE IMPACTING HURRICANE. . ....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 2257 16140 2254 15837 1888 15342 1891 15615 2254 16140 . NNNN |
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