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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 12/24/07 2202Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-11  2145Z   KUSSELSON
DMSP SSMI:1550Z/1624Z NOAA AMSU:1613Z NASA AMSR-E:1238Z
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LOCATION...W OREGON...W WASHINGTON...
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ATTN WFOS...SEW...PQR...PDT...OTX...
ATTN RFCS...NWRFC...
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EVENT...SUBTROPICAL DISTURBANCE MOISTURE EMBEDDED IN FRONT WITH NEXT
SYSTEM...
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SATELLITE ANALYSIS AND TRENDS...SUBTROPICAL DISTURBANCE THAT WAS NEAR
27N/DATELINE ON TAIL END OF FRONTAL MOISTURE ASSOCIATED WITH YESTERDAY'S
FRONT INTO THE NORTHWEST HAS NOW BECOME EMBEDDED IN NEXT FRONT TO
AFFECT THE NORTHWEST ON TUESDAY.  SUBTROPICAL MOISTURE STRUNG OUT ALONG
FRONTAL BOUNDARY FROM 48N/137W TO 40N/145W.   THIS SUBTROPICAL FEATURE
SHOULD FURTHER BUILD AN ALREADY STRONG RIDGE OUT AHEAD OF MAIN UPPER
LOW FEATURE AT 55N/153W AND FEATURES LOOK PROGRESSIVE DESPITE STRONGER
RIDGE BUILDING OUT AHEAD AS SYSTEM BEHIND PROGRESSES TOWARD THE DATELINE.
EARLIER THERE WAS A SIGNIFICANT INCREASE AND WIDENING OF PRECIPITABLE
WATER ALONG FRONTAL BOUNDARY MAXING OUT AT 1.45" NEAR FRONT.  TODAY THE
MAX MOISTURE AMOUNT HAS NOT SO MUCH INCREASED IN ABSOLUTE VALUE AS HIGHER
AMOUNTS HAVE INCREASED NORTHWARD ALONG FRONTAL BOUNDARY.  AT 1624Z
AMSU AND SSMI LEADING EDGE OF RAIN WAS CLOSING IN AT 140W/43 TO 50N.
XTRAPOLATION OF LEADING EDGE WOULD BRING PRECIP TO WA COAST ABOUT 17-20Z.
MAX SSMI RAIN RATES HAD BEEN NEAR 0.5"/HR BETWEEN 42N/145W AND 40N/148W
AND NEAR 42N/146W ON AMSU 1613Z PASS.  NOT SURE SUBTROPICAL FEATURE WITH
ITS MOISTURE EMBEDDED IN FRONT WILL BRING SAME TYPE OF RAIN AMOUNTS AS
PREVIOUS SYSTEM...WHAT WITH MAIN JET A LITTLE FURTHER NORTH AND MAIN
UPPER LOW QUITE A BIT FURTHER NORTH AND WEST...BUT AT LEAST THERE WILL
BE A PERIOD OF HVY PRECIP FOR MOST AREAS AND ESPECIALLY OROGRAPHIC AREAS.
PW ANOMALIES NOT QUITE UP TO THE LAST FRONTAL MOISTURE THAT CAME THRU...SO
GUESS THIS WOULD HAVE BEEN JUST A PLAIN OLD LIGHT PRECIP EVENT WITH A
PROGRESSIVE FRONT IF IT WAS NOT FOR THE SUBTROPICAL MOISTURE ENTRAINED.
WILL CONTINUE TO MONITOR...
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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 4995 12172 4563 12208 4401 12473 4972 12631
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