ZCZC NFDSPENES ALL SPENES CAZ000-ORZ000- . 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 . LOCATION...CALIFORNIA...OREGON... . ATTN WFOS...PDT...MFR...STO...MTR...PQR...EKA... ATTN RFCS...NWRFC...CNRFC... . EVENT...MOD/HVY RAIN EVENT PUSHING A BIT FARTHER S ACROSS OR AND INTO NRN CA . 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. . 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. . ....NESDIS IS A MEMBER OF 12 PLANET.... . FOR QUESTIONS AND COMMENTS CONCERNING THE SATELLITE PRECIPITATION MESSAGES AND GRAPHICS PLEASE EMAIL SSDPrecip@noaa.gov . FOR PRECIP MESSAGES AND GRAPHICS ON THE WEB: http://www.ssd.noaa.gov/PS/PCPN/ . FOR AUTOMATED SATELLITE PRECIPITATION ESTIMATES ON THE WEB: http://www.star.nesdis.noaa.gov/smcd/emb/ff/CONUS.php . LAT...LON 4549 12059 3867 12204 3886 12552 4537 12424 . NNNN