ZCZC NFDSPENES ALL
SPENES
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 12/02/07 1617Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: G11  1600Z  CK
NOAA AMSU:  1129Z

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LOCATION...W OREGON...W WASHINGTON...NW CALIFORNIA
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ATTN WFOS...OTX...PDT...MFR...SEW...PQR...EKA...MTR
ATTN RFCS...NWRFC...CNRFC...
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EVENT...APROACHING FRONTAL SYSTEMS..MOD/HVY RAIN
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SATELLITE ANALYSIS AND TRENDS...GOES IMAGERY SHOWS THE FIRST OF TWO
MAJOR LOW PRESSURE/FRONTAL SYSTEMS SPREADING RAIN ACRS W WA/OR. IR AND
WV IMAGERY ANIMATIONS SHOWS CIRC CENTER NR 44N 130W MOVG STEADILY TWD
OREGON. TO THE E AND SE OF CIRC..CLOUD TOPS HAVE BEEN STEADILY COOLING
WITHIN BAROCLINIC BAND. MICROWAVE RAIN RATES RANGED UP TO THE 0.2-0.4"/HR
RANGE AS OF 1129Z AMSU PASS..AND LOOKS LIKE THE MAIN FOCUS OF THE MOD/HVY
RAIN WITH THIS SYSTEM WILL BE OVER W OR AND NW CA..WITH SOME OF SW WA
INCLUDED.  AMSU PW IMAGERY SHOWS THAT MOISTURE WITH THIS SYSTEM..AS WELL
AS THE SECOND ONE TO THE W..HAS ORIGINS IN THE SUBTROPICS OF THE W PAC
AS WELL AS THE EPAC SUBTROPICS VCNTY OF HAWAII. RECENT AMSU ANIMATION
SHOWS THAT THESE TWO PLUMES HAVE NOW COMBINED.. WITH PW VALUES IN THE
CORE OF THE PLUME BTWN 1.5-2". ACCORDING TO CIRA EXPERIMENTAL BLENDED
PW PRODUCT...THIS IS AT LEAST IN THE 150-200% OF NORMAL RANGE.
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AS MENTIONED ABOVE...SECOND SYSTEM IS FOLLOWING ON THE HEELS OF THE
ONE DESCRIBED ABOVE. THE LEADING EDGE OF THE CLOUD SHIELD WITH THE
SECOND FRONTAL BAND IS CROSSING 140W. VERY STRONG VERICALLY STACKED
LOW PRESSURE IS NR 38N 153W. WITHIN FRONTAL BAND..CLOUD TOPS HAVE
BEEN RAPIDLY COOLING BTWN 30N TO N OF 40N..INDICATIVE OF UPWARD MOTION
INCR..DUE TO INCRG UPPR DIFFLUENCE AND STRONG UPPR JET. AS A RESULT OF
THE RAPID DEVELOPMENT AND ADVANCEMENT OF THIS BAND..THERE WILL BE NOT
MUCH BREAK FOR THE DISCUSSION AREA BTWN THE MOD/HVY RAINFALL WITH THE
LEADING SYSTEM AND THIS ONE. AGAIN..BEST INDICATION FM IMAGERY TRENDS IS
THAT THE MAIN FOCUS OF THE HEAVY RAIN FM THESE SYSTMES WILL BE W OR AND
NW CA TODAY INTO TOMORROW. IN FACT..WITH THE SWD BUILD OF MOD/HVY RAIN
WITH THE SECOND SYSTEM..WOULD ALSO BE CONCERNED FOR HVY RAIN SPREADING
ACRS MUCH OF THE N COAST THRU SFO AREA ON MONDAY/MONDAY EVE.
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A GRAPHIC ACCOMPANYING THIS SPENES WILL BE AVAILABLE ON THE WEB IN APPX
10 MINUTES. ANY QUESTIONS OR FEEDBACK CAN BE SENT VIA AWIPS 12 PLANET.
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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 4991 12667 4987 12036 3800 12200 3800 12838
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