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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 12/22/07 2238Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-11 2215Z KUSSELSON
NOAA AMSU: 1915Z DMSP SSMI: 1438/1511Z/1653Z/1620Z DMSP SSMIS:1736Z
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LOCATION...W OREGON...W WASHINGTON...
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ATTN WFOS...SEW...PQR...
ATTN RFCS...NWRFC...
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EVENT...NEXT SYSTEM HAS HEALTHY RAIN RATES BUT PROGRESSIVE...
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SATELLITE ANALYSIS AND TRENDS...BIG PICTURE SHOWED THAT THE MAIN LOW
CENTER WITH THE NEXT STORM WAS FURTHER TO THE WEST AND NORTH OF THE PATH
OF THE LOW THAT AFFECTED THE AREA TODAY.  LOT MORE COLD AIR CU BEING
GENERATED WITH THE NEXT LOW AND IT APPEARS THAT SYSTEM IS PROGRESSIVE
AND FRONTAL PRECIP WITH BAROCLINIC BOUNDARY WILL BE AFFECTING MOST OF
THE NORTHWEST ON SUNDAY.  1653Z SSMI AND 1736Z SSMIS LEADING EDGE OF RAIN
RATES WERE TO 43-46N/143W...WHILE 1915Z AMSU PASS SHOWED LEADING RAIN AREA
TO ABOUT 140W/141W.  EXTRAPOLATION BRINGING THIS LEADING EDGE OF RAIN TO
THE WA COAST ABOUT 12-15Z.  OCCLUSION BASED ON MICROWAVE CHANNEL...GOES
VIS AND SATELLITE HIGH LEVEL WINDS WAS CLOSE TO 43N/144W...SO THERE
DOES NOT APPEAR TO MUCH WARM FRONTAL ACTIVITY THAT COULD AFFECT W
WA...BUT IF IT DOES IT COULD CLIP THE NW PART LATER TONIGHT OR SUNDAY
MORNING BEFORE BAROCLINIC BOUNDARY APPROACHES DURING THE DAY.  AMSU MAX
RAIN RATES WITH WARM FRONT WERE 0.25"-0.35"/HR AND WITH FRONT BACK AT
41N/148W WAS AS HIGH AS 0.75"/HR.  WHILE SSMI RAIN RATES HAD CLOSE TO
THE SAME MAX RATES WITH BOTH THE WARM FRONT AND BAROCLINIC BOUNDARY.
AND PW VALUES FROM BOTH TYPES OF MICROWAVE SATELLITE WERE MAXING OUT
AT CLOSE TO 1.4" WITH FRONT WITH A MODERATE MOISTURE TRANSPORT FETCH.
SO RIGHT NOW THAT WOULD TRANSLATE INTO A FAIRLY QUICK MOVING, BUT INTENSE
PRECIP EVENT...ESPECIALLY WITH AS THE FRONTAL BOUNDARY APPROACHES
DURING THE DAY SUNDAY AND PASSES THRU SUNDAY AFTERNOON AND EVENING.
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 4956 12791 4945 12293 4495 12316 4368 12683
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