Satellite Precipitation Estimates (TXUS20 KWBC)
Issued by NWS

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000
TXUS20 KNES 212327
SPENES
ZCZC NFDSPENES ALL
SPENES
WAZ000-
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 10/21/14 2326Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404
LATEST DATA USED: GOES-15 2300Z  HANNA
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LOCATION...WASHINGTON...
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ATTN WFOS...OTX...PDT...SEW...PQR...
ATTN RFCS...NWRFC...
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EVENT...SATELLITE FEATURES FOR HEAVY RAIN THREAT
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SATELLITE ANALYSIS AND TRENDS...LARGE SCALE PATTERN ON LATEST WV
IMAGERY SHOWS CLASSIC HEAVY RAINFALL PATTERN SETTING UP FOR PORTIONS OF
THE PACIFIC NW TONIGHT EXTENDING INTO TOMORROW AS DEEP LAYER W/SW FLOW
BETWEEN ANOMALOUS GULF OF AK VORTEX AND ANOMALOUS RIDGE EXTENDING FROM
OFF THE CA COAST TO VIC OF HI WAS TRANSPORTING DEEP TROPICAL MOISTURE
TOWARDS THE PAC NW.  LATEST BLENDED PW ANALYSIS WAS SHOWING PLUME OF
ANOMALOUS MOISTURE EXTENDING FROM COASTAL AREAS OF WA/OR EXTENDING W
TOWARDS THE CNTRL AND W TROPICAL PACIFIC.  ZONAL/QUASI-ZONAL WCB/MOISTURE
PLUME WITH NUMEROUS EMBEDDED SHORTWAVE TROFS WAS SUGGESTIVE TO POTENTIAL
FOR IN STREAM CYCLOGENSIS.  IT DOES APPEAR AS THOUGH CYCLOGENESIS IS
ONGOING OFF THE PAC NW COAST AHEAD OF HEIGHT FALLS NOW APPROACHING 135W
AS FLOW HAS BEEN BACKING AHEAD OF THIS HELPING TO INCREASE DIFFLUENCE
OVER COASTAL LOCATIONS.  MORE SIGNIFICANT SHORTWAVE TROF WAS NOTED
UPSTREAM OVER THE ALEUTIANS AND APPROACHING 160W AND THIS SHOULD ALLOW
FOR ADDITIONAL CYCLOGENESIS AS THIS APPROACHES WCB OVERNIGHT.
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SHORT TERM OUTLOOK VALID 2300-0500Z...MEDIUM CONFIDENCE FACTOR
IN SHORT TERM OUTLOOK...WOULD EXPECT PROLONGED RAINFALL EVENT TO
BEGIN THIS EVENING AND CONTINUE THROUGH THE OVERNIGHT HOURS AS LEAD
SHORTWAVE TROF CONTINUES AIDING CYCLOGENESIS AND LARGE SCALE FORCING
OVER THE REGION.  AS LARGE SCALE FORCING INCREASES THIS EVENING AND
COUPLES WITH INCREASING OROGRAPHIC ASCENT WOULD EXPECT HEAVY RAINFALL
TO CONTINUE INCREASING OVER THE NEXT SEVEARL HOURS AND CONTINUE THROUGH
THE OVERNIGHT HOURS.  JET STREAK/DRY SLOT NOW PUSHING NE AND APPROACHING
130W SHOULD ALLOW FOR A CONTINUED INCREASE IN CURVATURE TO CLOUD FIELD
AS COMMA CLOUD TYPE FEATURE DEVELOPS.  THIS SHOULD ALLOW FOR SURFACE LOW
TO DEVELOP W IN SYSTEM RELATIVE SENSE TOWARDS W PORTIONS OF THE WCB AS
IT LIFTS NE TOWARDS VANCOUVER ISLAND.  THIS SHOULD ALLOW FOR PROLONGED
PERIOD OF ENHANCED SW FLOW SUGGESTING THAT MOST ANOMALOUS MOISTURE FLUX
SHOULD INCREASE THROUGHOUT THE NIGHT AND BE ENHANCED INTO THE OLYMPIC
PENINSULA, N CASCADES AND COASTAL RANGES OVERNIGHT ENHANCING HEAVY RAIN
THREAT IN THESE AREAS.  SEE QPFERD FOR FURTHER DETAILS.
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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 5075 12284 4996 12117 4862 12046 4737 12077 4659 12192
4648 12371 4786 12476 4930 12580 5050 12479
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