Satellite Precipitation Estimates (TXUS20 KWBC)
Issued by NWS

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TXUS20 KNES 200820
SPENES
ZCZC NFDSPENES ALL
SPENES
CAZ000-ORZ000-WAZ000-
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 12/20/14 0819Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404
LATEST DATA USED: GOES-15 0800Z KUSSELSON
NOAA AMSU:0530Z 0620Z  DMSP SSMIS: 0317Z 0459Z
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LOCATION...NW CALIFORNIA...W OREGON...W WASHINGTON...
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ATTN WFOS...MFR...SEW...PQR...EKA...
ATTN RFCS...NWRFC...CNRFC...
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EVENT...BEGINNINGS OF ATMOSPHERIC RIVER EVENT THAT HAS CROSSED THE
PACIFIC BETWEEN DEC 16 AND NOW...
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SATELLITE ANALYSIS AND TRENDS...CLASSIC ATMOSPHERIC RIVER OF MOISTURE
THAT WAS FIRST IDENTIFIED COMING OFF OF CENTRAL CHINA ON DEC 15;
CENTRAL AND SOUTHERN JAPAN DECEMBER 16 AND HAS HELD TOGETHER NICELY
WHILE CROSSING THE NORTHERN AND CENTRAL PACIFIC IN A RELATIVELY
SHORT PERIOD OF TIME WAS NOW CENTERED 25N/DATELINE TO 40N/150W TO
42N/140W AND NOSING AT BETWEEN 45N/129W TO 39N/129W. WITH MAX PWAT
VALUES OF 1.50"-1.7" CENTERED AT 42N/145W TO 40N/138W.    A NICE
HISTORY OF THE PLUME OVER THE PAST SEVERAL DAYS CAN BE SEEN AT:
http://www.ospo.noaa.gov/Products/bTPW/TPW_Animation.html?fromDate=20141215&fromHour=0&endDate=20141220&endHour=6&product=GLOBAL_TPW&interval=3hours
LATEST 06Z NOAA AMSU MICROWAVE PASS SHOWED MAX 20 MILE AREAL AVERAGE
INSTANTANEOUS RAIN RATES OF 0.26"/HR (OBVIOUS NO OROGRAPHICS OVER THE
WATER) CENTERED AT 44N/128W WITH ANOTHER MAX OF 0.22"/HR AT 46.8N/129W AND
48N/127.5W TO 50N/130W.  LATEST QMORPH 6 HR MICROWAVE RAIN ACCUMULATION
THROUGH 04Z SHOWED A FEW MAX AMOUNTS OF 0.75"-1.0" CENTERED 41N/135W AND
44N/133W AND A GENERAL MAX OF 0.50" TO 0.75" FROM 47N/133W TO 45N/133W AND
ALL HEADING EAST.   MICROWAVE NOT PICKING UP MODERATE TO OCCASIONALLY HVY
RAIN WITH INTERACTION OF JET AND INCREASING LOW LEVEL MOISTURE NW CA-SW
OREGON BORDER AREA THAT MAY ALSO BE INFLUENCED BY INCREASING LOW LEVEL
WINDS AND OROGRAPHICS AS PER LATEST METOP ASCAT WINDS OF 0547Z OUT OF
THE SOUTH TO SSW JUST OFFSHORE AT THE TIME.  WELL DEFINED COOLING CLOUD
TOP WEDGE 46.5N/128W TO 48N.126.5W HAS A SIGNATURE OF SOME MODERATE TO
HVY RAIN AND THAT HEADING TOWARD WEST CENTRAL TO NW WA NEXT FEW HRS.
OUT AHEAD WAS AN ENHANCED AREA OF SHOWERS/RAIN EXTENDING INTO SW WA AND
NW OREGON.  AND OF COURSE FURTHER SOUTH AN ENHANCED AREA OF COOL TOP
RAINS INTO W CENTRAL OREGON AND THE INCREASED MOISTURE WITH THE PLUME
AND JET INTERACTION INTO SW OREGON AND FAR NW CA.
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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 0815-1115Z...MEDIUM TO HIGH CONFIDENCE FACTOR
IN SHORT TERM OUTLOOK...CONTINUED INCREASING RAINS COAST AND WORKING
INLAND WESTERN WA AND WESTERN OREGON.  AND WITH JET AND INCREASED MOISTURE
STEADY LIGHT TO MODERATE/OCCLY HVY CONTINUING FAR NW CA AND INCREASING
A BIT SOUTH IN N CA.   START OF A LONG HVY RAIN EVENT...SO SEE WPC QPF
AND EXCESSIVE GRAPHICS AND DISCUSSIONS FOR ADDITIONAL DETAILS BEYOND
THE NEXT 3HRS.
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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 4790 12729 4788 12287 4141 12332 4163 12511
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