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ZCZC NFDSPENES ALL SPENES HIZ000- . SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 03/14/20 1929Z SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404 LATEST DATA USED: GOES17; BLTPW; FCS LOCATION...HAWAII... . ATTN WFOS...HFO... ATTN RFCS...AKRFC... . EVENT...HEAVY RAINFALL APPROACHING THE BIG ISLAND . SATELLITE ANALYSIS AND TRENDS...GOES WEST SATELLITE IMAGERY SHOWS A LONG FETCH OF DEEP TROPICAL MOISTURE SET TO IMPACT THE BIG ISLAND OF HAWAII AND SOUTHERN HAWAIIAN ISLANDS OF MAUI AND NIIHAU SETTING THE STAGE FOR A POTENTIAL LENGTHY RAINFALL EVENT FOR HAWAII. SATELLITE DERIVED SURFACE MOISTURE CONVERGENCE FIELDS ARE DEVELOPING ACROSS THE CENTER OF THE HAWAIIAN ISLAND CHAIN, AND ARE STRENGTHENING OVER THE BIG ISLAND. AS A STREAM OF WATER VAPOR IMPACTS THE WEST FACING SLOPES OF THE BIG ISLAND CURRENTLY, AS GREATER QUANTITIES OF ATMOSPHERIC MOISTURE ARE BEING DRAWN NORTHWARD AHEAD OF AN APPROACHING SORT WAVE FROM THE WEST, PW QUANTITIES ARE NEAR 2.0 INCHES PER BLTPW DATA, 850 MB THETA E QUANTITIES ARE 330K OVER THE SOUTHERN ISLANDS IN THE HAWAIIAN ISLAND CHAIN. LESSER PW QUANTITIES RESIDE TO THE NORTH AROUND 1.5 INCHES OVER MOLOKAI, TO JUST OVER AN INCH PW TO THE NORTH OVER OAHU AND LIHUE; THEREFORE, THE IMMEDIATE AFFECTS REGARDING HEAVY RAINFALL WILL BE ON THE WEST FACING TERRAIN AS THE MOISTURE IMPACT THE BIG ISLAND FROM A WESTERLY DIRECTION. FLASH FLOODING IS A CONCERN MOST IMMEDIATELY FOR THE BIG ISLAND. HYDROESTIMATOR DATA ESTIMATES OVER A 6 HOUR PERIOD INDICATE AS MUCH AS 6 INCHES OF RAIN HAS POTENTIALLY FALLEN ON THE WEST SIDE OF THE BIG ISLAND, WITH MORE WATER VAPOR UP STREAM OF THE SOUTHERN PART OF THE HAWAIIAN ISLAND CHAIN. . SHORT TERM OUTLOOK VALID 1930-0030Z...HIGH CONFIDENCE FACTOR IN SHORT TERM OUTLOOK...RADAR SHOWS EMBEDDED HEAVIER CONVECTIVE ELEMENTS APPROACHING THE WEST SIDE OF THE BIG ISLAND OF HAWAII. RAINFALL TOTALS ARE NEAR 6 INCHES SO FAR, AND WITH MORE RAINFALL EXPECTED AND A LENGTHY STREAM OF WATER VAPOR UP STREAM AIMED TO IMPACT THE HAWAIIAN ISLANDS, MODERATE TO HEAVY RAINFALL WILL BE CONTINUING WHERE HEAVY RAIN HAS FALLEN ALREADY. EXPECT FLASH FLOODING WITH HEAVIER DOWNPOURS, ESPECIALLY ON THE WEST FACING TERRAIN. . ....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 1394 16402 1255 16087 1036 15870 1093 17235 1205 17041 2222 15811 1873 15313 1871 15565 2219 16079 2221 16081 . NNNN |
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