NOAA Office of Satellite and Product Operations
Satellite Precipitation Message

ZCZC NFDSPENES ALL
SPENES
HIZ000-
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 03/13/21 1003Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404
LATEST DATA USED: G17 0920Z;RADAR
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LOCATION...HAWAII...
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ATTN WFOS...HFO...
ATTN RFCS...AKRFC...
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EVENT...FLASH FLOODING IMMINENT MOLOKAI/MAUI/KAHOOLAWE/LANAI
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SATELLITE ANALYSIS AND TRENDS...GOES W 17 SATELLITE IMAGERY SHOWS A WELL DEFINED S/WV WITH AN INFLECTION POINT IN THE KAUAI CHANNEL GENERATING PVA AS IT MOVES TO THE EAST ACROSS THE HAWAIIAN ISLANDS AHEAD OF AN UPPER LEVEL TROUGH MOVING TO THE SOUTH TOWARDS THE NORTHERN HAWAIIAN ISLANDS. EXTREMELY HEAVY RAINFALL APPROACHES THE HAWAIIAN ISLANDS OF MOLOKAI, KOLAOWALE, MAUI AS RADAR INDICATED. DIVERGENCE ALOFT AND SURFACE MOISTURE CONVERGENCE ASSOCIATED WITH THE UPPER LEVEL FEATURES AND STRONG SOUTHWESTERLY FLOW AHEAD OF THE S/WV ENERGY MOVING ACROSS HAWAII. ALONG THE SOUTHERN FACING SLOPES OF MAUI, PERSISTENT BANDS FORM AS WINDS FROM THE SOUTH AND SOUTHWEST FLOW INTO THE HIGHER TERRAIN MAKING FOR STATIONARY RAIN BANDS, ESPECIALLY DANGEROUS REGARDING FLASH FLOODING. THE STANDING WAVE PATTERN ON A LARGER SCALE IS OF CONCERN DUE TO THE SLOW PROGRESSION, LEADING TO A PROLONGED EVENT WITH HEAVIER RAINFALL RESULTING IN FLASH FLOODING FOR THE BIG ISLAND AS WELL. THE SSMIS/AMSU PW AMOUNTS ARE ON THE HIGHER END ON THE SCALE IN EXCESS OF 1.8 INCHES OVER THE KAUAI CHANNEL.
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SHORT TERM OUTLOOK VALID 1000-1800Z...HIGH CONFIDENCE FACTOR
IN SHORT TERM OUTLOOK...RADAR SHOWS AN AREA OF EMBEDDED CONVECTION WITHIN A BROAD AREA OF HEAVY PRECIPITATION AS 0952Z ENTERING THE CENTRAL AND EASTERN PORTIONS OF HAWAII. FLASH FLOODING IS LIKELY FOR MAUI, MOLOKAI, KAHOOLWALE, LANAI AS WELL AS THE BIG ISLAND WILL EXPERIENCE FLASH FLOODING.
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....NESDIS IS A MEMBER OF NWSCHAT (NESDISSATELLITEPRECIP)....
....NESDIS IS A MEMBER OF 12 PLANET....
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FOR QUESTIONS AND COMMENTS CONCERNING THE SATELLITE
PRECIPITATION MESSAGES AND GRAPHICS PLEASE EMAIL
SSDPrecip@noaa.gov
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FOR PRECIP MESSAGES AND GRAPHICS ON THE WEB:
http://www.ospo.noaa.gov/Products/atmosphere/spe/
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FOR AUTOMATED SATELLITE PRECIPITATION ESTIMATES ON THE WEB:
http://www.star.nesdis.noaa.gov/smcd/emb/ff/CONUS.php
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LAT...LON 2248 16125 2247 15785 1879 15272 1889 15598
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