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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 12/19/07 1714Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-11 1630Z  RUMINSKI
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LOCATION...CALIFORNIA...OREGON...WASHINGTON...
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ATTN WFOS...PDT...REV...MFR...STO...SEW...PQR...EKA...
ATTN RFCS...NWRFC...CNRFC...
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EVENT...PRECIPITATION TRENDS FOR NORTHERN CALIFORNIA..OREGON AND
WASHINGTON
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SATELLITE ANALYSIS AND TRENDS...SFC FNT HAS CLEARED THE OLYMPIC COAST
IN NW WA WITH HEAVIEST RAIN QUICKLY MVG INTO NRN CASCADES. QUICK MVMNT
AND MODEST MOISTURE SUPPLY (PW/S AOB .7") HAS MEANT MAINLY LGT TO MDT
PRECIP AMNTS FOR WA. HOWEVER..AS UPR SYSTEM WRAPS UP OVER NRN VANCOUVER
ISLAND ONSHORE FLOW WILL KEEP SHOWERS OVER COASTAL WA AND CASCADES FOR
AT LEAST NEXT 6-12 HRS.
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SOMEWHAT DEEPER MOISTURE AVBL FURTHER S. MICROWAVE DERIVED PW/S FROM
10-12Z SHOWING A SLUG OF 1.0-1.2" PW/S BTWN 130-140W JUST S OF 40N. THIS
MOISTURE WILL BE TAPPED BY NEXT SHORT WAVES APCHG THE COAST. LEAD
SHORT WAVE MVG ALG FNTL ZN IS AT 43N135W AND MAINLY MVG E. GOES IR CLD
TOP TEMPS HAVE BEEN COOLING PAST SEVERAL HRS IN ADVANCE OF THIS FTR
INDICATING ENHANCED LIFT/PRECIP RATES. ADL VORT IS QUICKLY DROPPING S
BEHIND THE LEAD SHORT WAVE AND IS CURRENTLY NR 45N145W. IT DOES NOT APR
THAT THESE FTRS WILL PHASE. THE LARGER PATTERN ALSO SHOWS THAT DEEPENING
UPR LOW OVER THE SW ALEUTIANS IS AMPLIFYING THE RIDGE ALG 160W WHICH IS
HELPING TO DRIVE THE VORT NR 45N145W TO THE S. THIS WILL HELP KEEP THE
FNTL BOUNDARY AND PRECIP PROGRESSIVE AND EVENTUALLY MOVE FROM THE CA/OR
BORDER INTO CENTRAL AND SRN CA. BUT EXPECT THAT THIS WILL HAPPEN AFTER
THE LEAD SHORT WAVE MOVES INLAND. THEREFORE...EXPECT HEAVIEST RAIN TO
OCCUR NEXT 12-24 HRS AS LEAD SHORT WAVE TAPS SOMEWHAT DEEPER MOISTURE
MENTIONED ABV. WITH PLUME LYING JUST S OF 40N AND SHORT WAVE TRACKING
ALG 43N EXPECT HEAVIEST RAIN OVER SW OR/NW CA. MICROWAVE DERIVED RAIN
RATES WERE LIGHT AT 10-12Z (LESS THAN .1"/HR) BUT EXPECT THAT THEY HAVE
INCRD SOMEWHAT SINCE THEN BASED ON LATEST GOES IR TRENDS.
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SEE NCEP HPC DISCUSSION AND QPF/S FOR FORECAST.
....NESDIS IS A MEMBER OF 12 PLANET....
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SSD/SAB WEB ADDRESS FOR PRECIP ESTIMATES:
HTTP://WWW.SSD.NOAA.GOV/PS/PCPN/
...ALL LOWER CASE EXCEPT /PS/PCPN/
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LAT...LON 4780 12500 4775 12114 4022 12115 4015 12481
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