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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 01/31/08 1541Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: G11  1530Z  CK
NASA TRMM: 1022Z
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LOCATION...NW/N CALIFORNIA...
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ATTN WFOS...REV...MFR...STO...EKA...
ATTN RFCS...NWRFC...CNRFC...
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EVENT...CLOUD TOP COOLING ASSOCD WITH APCHG UPPR TROF..HVY PRECIP
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SATELLITE ANALYSIS AND TRENDS...CLOUD TOPS HAVE BEEN STEADILY COOLING
AND EXPANDING OVER THE DISCUSSION AREA AS UPPR TROF APPROACHES FM
THE WEST..AND LL THETA-E ADVECTION FOCUSES OVER THE AREA. G11 IMAGERY
ANIMATION SHOWS AMPLIFYING UPPR SHORT WAVE TROF W OF 130W..FM 40N TO N
OF 50N..IS MOVG STEADILY EWD TWD THE PACNW/N CA COAST. THE COMBINATION
OF APPROACHING SHORT WAVE..UPPR DIVERGENCE..AS WELL AS STRONG LL
THETA-E ADVECTION..HAS LED TO A STEADY INCR IN LIFT/UPWARD MOTION. AS A
RESULT..CLOUD TOP TEMPS HAVE NOW COOLED TO -54C. CORRESPONDINGLY.. PRECIP
RATES HAVE STEADILY INCRD OVER NW CA TO SISKIYOUS/SHASTA AREA. CURRENT
XTRAP OF UPPR TROF PUTS IT ALONG COAST AROUND 00Z. THUS.. CONTINUED
MOD/HVY RAIN AND SNOW IS LIKELY TO CONTINUE THROUGHOUT THE MORNING AND
MUCH OF THE AFTN OVER THE DISCUSSION AREA. FM STLT/RADAR/ OBS..HEAVIEST
PRECIP ATTM EXTENDS THROUGH HUMBOLDT/TRINITY/SHASTA COUNTIES ON THE SRN
END...BUT EXPECT SRN END TO SLIP SWD/SEWD AS APPCH OF UPPR TROF FORCES
THE PRCIP BAND TO PROGRESS TWD THE SE. LAST HALF HRLY IR IMAGE AT 1530Z
SHOWS CLOUD TOPS ARE EXPANDING OFFSHORE..W OF HUMBOLDT COUNTY..AND MOVG
SEWD..WHICH WOULD ALSO SUPPORT MOD/HVY RAIN SPREADING INTO MENDOCINO
COUNTY.
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NASA AMSR-E PASS FM 1022Z INDICATED RAIN RATES UP TO 0.2"/HR. SINCE
THAT TIME G11 IR IMAGERY HAS SHOWN THE COOLING CLOUD TOPS AS MENTIONED
IN PARA ABOVE..INDICATING AN INCR IN MAX RATES. ADDITIONALLY..40KT
WINDS INDICATED BY G11 STLT WIND DATA PLOTS AROUND 700MB LVL FAVORS
FURTHER-ENHANCED RATES FOR FAVORED UPSLOPE AREAS.
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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 4182 12075 3968 12050 3897 12500 4181 12660
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