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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 12/20/12 1456Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404
LATEST DATA USED: GOES-15 1441Z JBN
AMSU:1205Z
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LOCATION...CALIFORNIA...OREGON...
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ATTN WFOS...PDT...MFR...STO...MTR...PQR...EKA...
ATTN RFCS...NWRFC...CNRFC...
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EVENT...MOD/HVY RAIN EVENT PUSHING A BIT FARTHER S ACROSS OR AND INTO
NRN CA
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SATELLITE ANALYSIS AND TRENDS...LATEST GOES WV IMAGERY SHOWS DEEP MID/UL
LOW WOBBLING ACROSS THE NE PACIFIC NEAR 50.5N/140.1W. NICE MOISTURE PLUME
ASSOCIATED WITH SFC FRONT CONTINUES TO WORK EWD/SEWD ACROSS WA/OR/NRN
CA ATTM WITH PWAT VALUES AVERAGING 0.8-0.9" PER BLENDED TPW IMAGERY. WV
IMAGERY CONTINUES TO SHOW A FEW IMPULSES RIDING ALONG IN THE MOISTURE
PLUME THAT SHOULD  HELP TO ENHANCE PRECIP THE NEXT FEW HRS ACROSS OR/NRN
CA AS THE MAIN FRONTAL RAIN BAND MOVES ACROSS THE REGION. STILL SEEING
SOME NICE ENHANCEMENT IN IR IMAGERY WITH THE CLOUD FIELD OVER WRN WA/WRN
OR/EXTREME NWRD CA SUGGESTING THAT MOD/HVY RAIN CONTINUES TO FALL WITHIN
THE BAND. OVERALL BAND LOOKS LIKE IT IS BECOMING MORE N/S ORIENTED WITH
TIME AND THIS MAY HELP TO SLOW EWD PROGRESSION OF THINGS THE NEXT FEW
HRS. SO IT LOOKS LIKE AREAS FROM CNTRL/WRN OR TO NRN CA MAY BEAR THE BRUNT
OF THE MOD/HVY RAIN NEXT FEW HRS. MOST RECENT AMSU PASS SUGGESTED AREAL
AVERAGED RAIN RATES OF ATLEAST 0.25-0.5"/HR IN THE CORE OF THE RAIN BAND
THAT IS NOW AFFECTING CNTRL OR. THESE RATES MAY BE A LITTLE LOW COMPARED
TO ACTUAL OBS RIGHT ALONG THE COAST WHERE RATES OF 0.5-0.75"/HR HAVE
BEEN OBSERVED IN SOME OF THE HEAVIER RAIN BURSTS. RAIN FALL AMTS HAVE
GENERALLY BEEN IN THE 1-2" RANGE WHERE THE MOST PERSISTENT BAND OF RAIN
HAS BEEN SET UP OVER NWRN OR THE PAST 6 HRS. LIGHTER AMTS OF 0.25-0.75"
HAVE BEEN OBSERVED S OF THE BAND ALONG THE COAST. THINK THES HEAVIER
RATES/AMTS WILL NOW BE FOCUSED MORE OVER NRN CA/SRN OR NEXT 3-6 HRS AS
MAIN PORTION OF BAND SHIFTS INTO THESE AREAS.
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SHORT TERM OUTLOOK VALID 1500Z-2100Z...MEDIUM TO HIGH CONFIDENCE FACTOR
IN SHORT
TERM OUTLOOK...BEST CHANCE FOR MOD/HVY RAIN WILL GRADUALLY SET UP
FROM THE CNTRL/SRN OR COAST SWD INTO NRN CA THE NEXT 3-6 HRS AS MAIN
FRONTAL BAND OF PRECIP WORKS INLAND ACROSS THE REGION. COULD SEE RAIN
RATES BETWEEN 0.5-1.0"/HR AT TIMES IN CORE OF THE BAND AND SHOULD SEE
ADDITIONAL RAIN FALL AMTS OF 1-2" WHERE BAND IS MOST PERSISTENT AND IN
FAVORED UPSLOPE AREAS.
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....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.ssd.noaa.gov/PS/PCPN/
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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 4549 12059 3867 12204 3886 12552 4537 12424
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