NOAA Office of Satellite and Product Operations
Satellite Precipitation Message

ZCZC NFDSPENES ALL
SPENES
HIZ000-
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 03/09/21 0307Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404
LATEST DATA USED: GOES-17 0230Z; AMSU 0110Z; BLENDED TPW 0013Z; MIMIC-TPW2 0200Z;
RADAR 0253Z; 0000Z PHTO SOUNDING; KH
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LOCATION...HAWAII...
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ATTN WFOS...HFO...
ATTN RFCS...AKRFC...
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EVENT...CONTINUED MODERATE TO HEAVY RAINFALL
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SATELLITE ANALYSIS AND TRENDS...GOES-17 WV AND IR SATELLITE IMAGERY DEPICT AN UPPER LOW CENTERED A COUPLE HUNDRED MILES WNW OF KAUAI WITH DEVELOPED CONVECTION ON THE SE SIDE OF THE LOW S OF THE ISLAND CHAIN. GOES-17 VIS SATELLITE IMAGERY SHOWS CONTINUED TRADE WINDS WITH THE HINT THAT AN INVERTED SURFACE TROUGH MAY BE DEVELOPING BELOW THE MID-UPPER LEVEL DEVELOPMENT, WITH A SLIGHT WSW ORIENTATION OF THE TRADE WINDS TO THE WEST OF THE MAIN CLOUD DECK. VARIOUS MICROWAVE SOUNDING IMAGES SHOW ENHANCED MOISTURE OVER AND TO THE EAST (UPWIND) OF THE ISLAND CHAIN, WITH ESTIMATED TPW VALUES APPROACHING 1.75" AROUND 150W SOUTH OF 21N. OBSERVED TPW FROM THE 00Z PHTO SOUNDING SHOWS 1.68", WHICH MEANS ACTUAL TPW COULD BE SLIGHTLY HIGHER THAN 1.75" UPSTREAM FROM THE ISLAND CHAIN.
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SHORT TERM OUTLOOK VALID 0300Z-1500Z...MEDIUM-HIGH CONFIDENCE FACTOR
IN SHORT TERM OUTLOOK...CONVECTIVE DEVELOPMENT IS EXPECTED TO CONTINUE FOR MUCH OF THE NEXT 12 HOURS AS A SURFACE TROUGH DEVELOPS IN RESPONSE TO THE UPPER-LEVEL SUPPORT ALOFT. AS AVAILABLE MOISTURE CONTINUES TO MOVE IN FROM THE EAST ON PERSISTENT MODERATE TO STRONG TRADE WINDS, ALONG WITH THE PRESENCE OF COLD TEMPERATURES ALOFT FROM THE UPPER LOW, CONVECTION WILL CONTINUE TO DEVELOP AND BECOME MORE EFFICIENT AS TIME PROGRESSES. THE EXACT LOCATION OF THE HEAVIEST RAINFALL WILL DEPEND ON EXACTLY WHERE THE TROUGH SETS UP, BUT THE MOST PERSISTENT RAINFALL HAS FALLEN ACROSS MAUI, MOLOKAI, LANAI, AND KAHOOLAWE PER LATEST RADAR TRENDS. A PERSISTENT NEARLY W-E ORIENTED BAND HAS SET UP OVER NORTHERN MAUI AND IS NOW ENCROACHING UPON MOLOKAI. THIS BAND IN PARTICULAR IS THE HIGHEST THREAT IN THE SHORT TERM, GIVEN THE NEAR PARALLEL ORIENTATION TO THE TRADES AND AMOUNT OF RAINFALL THAT HAS FALLEN OVER THESE LOCATIONS.
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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 2329 15958 2025 15359 1809 15505 2145 16084
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