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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 08/21/07 2315Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: 2245Z  GOES-12  TEB
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LOCATION...NEBRASKA...
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ATTN WFOS...OAX...GID...LBF...GLD...
ATTN RFCS...MBRFC...
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EVENT...CONVECTION ALONG FRONTAL SYSTEM
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SATELLITE ANALYSIS AND TRENDS...CELLS CONTINUE TO FIRE ALONG THE FRONTAL
BOUNDARY LYING ACROSS NEBRASKA THIS EVENING.  OF SPECIAL CONCERN ARE
THE SLOW-MOVING CELLS IN HOLT COUNTY IN NORTHEAST NEBRASKA.    THE IR
PRESENTATION ON SATELLITE SUGGEST SOME SEVERE ACTIVITY INVOLVED WITH
THESE CELLS BUT RAPID DEVELOPMENT ALSO SUGGEST RAIN ESTIMATES UP TO 2.1"
DURING THE PAST HOUR TO 2245Z.  THIS WOULD BE GREATER THAN FFG VALUES FOR
THIS REGION.  VERY HIGH DEWPOINTS IN THE UPPER 70'S AND INCREASING PW'S
AROUND 1.70" ARE AIDING IN INCREASING EFFICIENCY OF RAIN PRODUCTION AND
COULD LIKELY CAUSE LIKE HEAVY RAINS AS THIS LINE SLIPS SLOWLY EASTWARD
INTO KNOX COUNTY AND AT THE MISSOURI RIVER JUST WEST OF YANKTON, SD WHERE
A POSSIBLE MERGER WILL TAKE PLACE IN THE NEXT HALF-HOUR.  IF THAT OCCURS,
ESTIMATED HALF-HOUR RAIN RATES UP TO 1.5" OR MORE WILL LIKELY TAKE PLACE.
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FURTHER TO THE SOUTHWEST, ESPECIALLY IN AND AROUND FRONTIER AND GOSPER
COUNTIES, INCREASING AND COOLING CLOUD TOPS IN A SIMILAR ENVIRONMENT ARE
ENABLING INCREASING RAIN RATES ALREADY TO AN ESTIMATED 1.5" PER HALF-HOUR.
THIS IS ALSO DUE TO CELL MERGERS ALONG THIS LINE WHICH WILL LIKELY
CONTINUE TO TAKE PLACE AS THE LINE DEVELOPS OVER THE NEXT COUPLE OF 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 4284 9966 4014 10163 4011 9973 4273 9774 4283 9967
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