NOAA Office of Satellite and Product Operations
Satellite Precipitation Message

ZCZC NFDSPENES ALL
SPENES
HIZ000-
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 03/10/21 0353Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404
LATEST DATA USED: 0330 GOES-17 VIS/WV; 0300Z MIMIC-TPW2; 00Z PHTO SOUNDING; 0345Z-0349Z RADAR; KH
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LOCATION...HAWAII...
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ATTN WFOS...HFO...
ATTN RFCS...AKRFC...
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EVENT...REPEATED ROUNDS OF HEAVY RAINFALL
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SATELLITE ANALYSIS AND TRENDS...GOES-17 WV IMAGERY DEPICTS AN UPPER-LEVEL LOW ABOUT 150 MILES SOUTHWEST OF KAUAI, OR ABOUT 300 MILES WEST OF THE BIG ISLAND. A SURFACE LOW IS SEEN ON GOES-17 VIS IMAGERY BENEATH THE UPPER LOW. ALSO EVIDENT ON THE VISIBLE IMAGERY IS THE PERSISTENT TRADE WIND REGIME THAT HAS BEEN IN PLACE OVER THE PAST FEW DAYS. MW SOUNDING IMAGERY SHOWS A PLUME OF 1.75"-2.00" TPW AIR ENCROACHING UPON THE ISLAND CHAIN. THE OBSERVED VALUE AT 00Z FOR PHTO WAS 1.74".
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SHORT TERM OUTLOOK VALID 0400Z-1200Z...MEDIUM CONFIDENCE FACTOR
IN SHORT TERM OUTLOOK...AN EXPANSIVE CLOUD DECK WITH EMBEDDED CONVECTION LOOKS TO PERSIST OVER THE ISLAND CHAIN AS COOL AIR ALOFT, MOIST TRADE WINDS, A SURFACE LOW/TROUGH, AND ISLAND OROGRAPHY WILL ALL ALLOW FOR INCREASED INSTABILITY, INCREASED MOISTURE, AND ENHANCED LIFT TO OCCUR OVER THE NEXT COUPLE HOURS. IN THE VERY NEAR TERM, AN ENHANCEMENT IN CONVECTION ALONG THE SOUTHWESTERN SIDE OF THE BIG ISLAND WILL REMAIN ANCHORED ALONG THE SHORELINE THANKS TO THE TRADES AND OROGRAPHIC FLOW. HOWEVER, A GENERAL DOWNWARD TREND IN RAINFALL HAS BEEN NOTED ACROSS THE ISLAND CHAIN OVER THE PAST COUPLE HOURS ON RADAR, WITH MUCH OF THE EXISTING RAINFALL HAVING MOVED NORTH OF MOLOKAI AND OAHU. FURTHERMORE, A DRY SLOT HAS ROUNDED THE MID-UPPER LOW AND SITS JUST OFFSHORE. THIS COULD LIMIT THE AVAILABLE MOISTURE ALOFT AND LESSEN THE THREAT FOR HEAVY RAIN IF THE DRY SLOT WERE TO REACH THE ISLAND CHAIN. HOWEVER, LOW-LEVEL MOISTURE WILL REMAIN PLENTIFUL, SO ANY CONVECTION THAT DEVELOPS AND MOVES ASHORE OR FORMS AS MOIST AIR IS FORCED UP THE EASTERN AND SOUTHEASTERN FACING SLOPES WILL HAVE THE POTENTIAL FOR HEAVY RAINFALL.
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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 2310 15970 1977 15432 1834 15503 2173 16047
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