ZCZC NFDSPENES ALL
SPENES
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 04/16/08 2331Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-11 2300Z     CW
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LOCATION...CENTRAL COLORADO...
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ATTN WFOS...PUB...BOU...GJT...
ATTN RFCS...MBRFC...ABRFC...WGRFC...CBRFC...
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EVENT...MOD/HVY SNOWS ASSOCIATED WITH WELL-DEFINED BAROCLINIC LEAF
SIGNATURE
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SATELLITE ANALYSIS AND TRENDS...RECENT STLT TRENDS INDICATE BAROCLINIC
LEAF CLOUD SIGNATURE OVER MUCH OF WESTERN AND CENTRAL CO HAS BECOME
MORE WELL-DEFINED IN WV AND IR IMAGERY OVER THE LAST COUPLE OF HRS.
CLOUD TOP TEMPS HAVE COOLED TO AROUND -48C..A DIFFERENCE OF MORE THAN
-10C COOLER THAN THOSE MENTIONED IN PREVIOUS 1944Z SPENES MESSAGE.
INCREASING SNOWFALL RATES WITH MOD/HVY SNOWFALL SHOULD BE ANTICIPATED
NEAR THE COOLEST CLOUD TOPS IN OVER THE NEXT FEW HRS AND MAY INCLUDE
THE FOLLOWING COUNTIES..SW WELD..BOULDER..SE GRAND..GILPIN..CLEAR
CREEK..SUMMIT..AND PARK.
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THE MID-LVL SHORTWAVE IS STILL NW OF THE AREA STRETCHING ACROSS UT AND
W WY PER WV ANALYSIS..HOWEVER UPPER LVL DIVERGENCE HAS INCREASED OVER
CENTRAL/EASTERN CO FROM PREVIOUS SPENES MESSAGE.  THIS APPEARS TO BE IN
RESPONSE TO A RATHER IMPRESSIVE WNW-ESE ORIENTED JET STREAK LOCATED OVER
N AZ/NW NM PER STLT DERIVED WINDS.  AS THE SHORTWAVE PROGRESSES ESEWD
TOWARD CENTRAL CO AND THE JET STREAK CONTINUES TO ROUND THE BASE OF
THE TROUGH FROM THE SW..THE AXIS OF MOD/HVY SNOW SHOULD SHIFT SOUTHWARD
FROM ITS CURRENT POSITION INTO THIS EVENING.  23Z IR IMAGERY IS ALREADY
BEGINNING TO SHOW SOME CLOUD TOP COOLING OVER S/CENTRAL CO..SUGGESTING
THAT THIS MAY OCCUR OVER THE NEXT 2-4 HRS.
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SNOWFALL RATES MAY BE BETWEEN 1.0-1.5"/HR..WITH
SOME LOCALLY HIGHER AMOUNTS NEAR 2.0"/HR INVOF OF EL
PASO..DOUGLAS..ARAPAHOE..TELLER.. FREMOND..PUEBLO..CUSTER..AND HUERFANO
COUNTIES..AS THIS SYSTEM CONTINUES TO INTENSIFY THIS EVENING.
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PLEASE SEE WEB ADDRESS BELOW IN ABOUT 10-15 MINS FOR STLT GRAPHIC.
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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 4080 10670 4078 10433 3723 10375 3718 10641
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