ZCZC NFDSPENES ALL
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CAZ000-
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 12/17/08 0915Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-11 0845Z  HANNA
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LOCATION...CALIFORNIA...
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ATTN WFOS...PSR...VEF...SGX...HNX...LOX...
ATTN RFCS...CNRFC...
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EVENT...HEAVIER PRECIPITATION BEGINNING TO SPREAD INTO COASTAL RANGES
OF S CA
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SATELLITE ANALYSIS AND TRENDS...WV IMAGERY SHOWS THAT ANOMALOUS MID
LEVEL LOW CONTINUES DROP SOUTHWARD JUST OFFSHORE THE CNTRL/SOUTHERN
CA COAST.  THIS IS DUE IN LARGE PART TO VIGOROUS SHORTWAVE TROF/JET
STREAK ASSOCIATED WITH WELL DEFINED DRYING ON VAPOR IMAGERY CENTERED
NEAR 27N/129W.  HAVE ALSO BEGUN TO NOTICE A RAPID PROGRESSION TO THE
CIRRUS STREAMERS OFFSHORE THE BAJA AND BELIEVE THIS IS THE BEGINNING OF
STRENGTHENING UPPER LEVEL JET AS ABOVE MENTIONED HEIGHT FALLS TIGHTEN
HEIGHT GRADIENT IN THIS VICINITY.
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LARGE SCALE FORCING APPEARS TO BE RAPIDLY INCREASING OFFSHORE SOUTHERN CA
AS HAVE NOTICED RAPID IR CLOUD TOP COOLING OVER THE LAST SEVERAL HOURS
IN WHAT APPEARS TO BE THE FORMATIVE STAGES OF BAROCLINIC LEAF FEATURE.
MOST SIGNIFICANT COOLING AND SUBSEQUENT HEAVY PRECIPITATION APPEARS
TO BE JUST SOUTHEAST OF SANTA CATALINA AND SAN CLEMENTE ISLANDS AND
INTO W RIVERSIDE AND SAN DIEGO COUNTIES.  LATEST BLENDED PRECIPITABLE
WATER ANALYSIS SHOWS A NARROW BAND OF 0.75-1.00" PWS ALONG AN AXIS FROM
25.6N/125.7W TO 31.0N/119.0W.  OVER THE LAST 12 HOURS THIS FEATURE HAS
BECOME BETTER DEFINED AND ALSO BEGUN TO SURGE NE WITH STRENGTHENING AND
BACKING LOW LEVEL FLOW.  THE BEST COMBINATION OF  FORCING ON LEADING EDGE
OF INCIPIENT LEAF FEATURE AND MOISTURE FLUX ANOMALIES LOOKS TO BE FOCUSING
ON EXTREME S CA SOUTH OF ABOUT NFG SO WOULD EXPECT BEST PRECIPITATION
IN FAVORED TERRAIN IN THIS GENERAL VIC OVER THE NEXT 6-12 HOURS.
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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 3534 11745 3479 11648 3429 11607 3416 11564 3344 11536
3291 11593 3244 11603 3216 11662 3268 11765 3333 11826
3408 12053 3486 12047 3509 11954 3511 11858
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