Satellite Precipitation Estimates (TXUS20 KWBC)
Issued by NWS

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TXUS20 KNES 250932
SPENES
ZCZC NFDSPENES ALL
SPENES
HIZ000-
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 07/25/16 0931Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404
LATEST DATA USED: GOES-15: 0900ZDS
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RESENT FOR CORRECTION
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LOCATION...HAWAII...
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ATTN WFOS...HFO...
ATTN RFCS...APRFC...
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EVENT...UPDATE TO PREVIOUS SPE FOR ONGOING HVY RAIN THREAT ASSCD WITH
T.S. DARBY
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SATELLITE ANALYSIS AND TRENDS...STRONG CNVCTN WHICH DVLPD WITHIN THE
INFLOW BAND ACROSS HAS CONTINUED TO BRING COPIOUS SHORT TERM RAINFALL
AMOUNTS TO PARTS OF OAHU OVER THE PAST FEW HRS. RAIN GAUGES IN THE ERN
HALF OF THE ISLAND DEPICT A SWATH OF 3-7" PRECIP TOTALS MOST OF WHICH
HAS FALLEN DURING THE PAST 3 HRS CAUSING ONGOING FLASH FLOODING. IR SATL
IMAGERY SHOWS THE COLDEST TOPS STARTING TO DECAY NOW AND SHIFT NWD THOUGH
REGIONAL RADAR IMAGERY STILL SHOWS CONCENTRATED RAINS ANCHORED ALONG
THE NRN COAST OF THE ISLAND WITH ADDTL SHWRS STREAMING NWD WITHIN THE
INFLOW BAND. HOWEVER THE APPEARANCE OF THE BAND IS IN BOTH RADAR/SATL
IMAGERY IS THAT RAINFALL IS BECOMING LESS CONCENTRATED WITHIN IT THAN
IT HAS BEEN OVER THE PAST FEW HRS. MAJORITY OF LIGHTNING STRIKES ARE
NOW N OF OAHU INSTEAD OF TO THE S OR ON TOP OF THE ISLAND.
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BASED ON ENHANCED IR IMAGERY...THE LOW LVL CENTER OF DARBY IS CURRENTLY
PASSING JUST N OF KAUAI WITH THE OFFICAL CPHC TRACK INDICATING A REMNANT
LOW BY 18Z AS THE CIRCULATION TURNS MORE TO THE NW. THIS IS LIKELY DUE TO
THE PRESENCE OF AN ELONGATED MID-LVL TROF NW OF THE ISLAND CHAIN. RECENT
708Z ASCAT PASS DID SHOW A 30KT WIND BARB ALONG THE FAR ERN EDGE OF THE
STORM TO THE  N OF MOLOKAI THOUGH THIS APPEARED TO TSTORM RELATED. A
WEAKLY CONVERGENT ZONE WAS EVIDENT THOUGH N OF MOLOKAI/OAHU THAT CAN
BE EXTRAPOLATED WWD AND SEEMS TO BE WHAT THE OFFSHORE CNVCTN N OF THE
ISLANDS HAS BEEN POSITIONED ALONG. AN AXIS OF RELATIVELY DRIER MID-LVL
AIR CAN BE PICKED OUT IN ENHANCED WV IMAGERY OVER KAUAI AND THE KAUAI
CHANNEL WRAPPED INTO THE LOW LVL CENTER ACCOUNTING FOR THE MINIMUM OF
PRECIP IN THOSE AREAS CURRENTLY EVEN THOUGH LOW LVLS REMAIN QUITE MOIST.
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AN ANNOTATED SATELLITE GRAPHIC SHOWING THE HEAVY PRECIPITATION
THREAT AREA SHOULD BE AVAILABLE ON THE INTERNET ADDRESS LISTED
BELOW IN APPROXIMATELY 10-15 MINUTES.
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SHORT TERM OUTLOOK VALID 0930-1530Z...MEDIUM-HIGH CONFIDENCE FACTOR
IN SHORT TERM OUTLOOK...INFLOW BAND ACROSS OAHU REMAINS THE GREATEST SHORT
TERM THREAT FOR HVY RAINFALL WITH RAINRATES OF 2-4"/HR BEING OBSERVED
AT TIMES IN THE 05-09Z PERIOD. WHILE THE BAND IS BECOMING MORE SHOWERY
IN NATURE...SATL/RADAR IMAGERY CONTINUE TO SHOW ADDTL DVLPMT OCCURRING
S OF OAHU THAT WILL BRING HVY RAINFALL TO MOST OF THE ISLAND. WWD STORM
MOTION WILL SLOWLY PULL THE BAND W ACROSS OAHU AND THE KAUAI CHANNEL
EVENTUALLY REACHING KAUAI BY ABOUT 12Z. DO NOT BELIEVE THE THREAT FOR
EXCESSIVE RAINS WILL BE AS GREAT AS FOR KAUAI AS THE EARLIER/CURRENT
THREAT FOR OAHU...THOUGH STILL EXPECT THAT SVRL INCHES OF RAINFALL WILL
LIKELY FALL OVER KAUAI AFTER 12Z.
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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 2301 15971 2189 15675 2057 15717 2183 16051
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