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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 07/25/07 1843Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-12 1830Z GG
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LOCATION...TENNESSEE...
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ATTN WFOS...MRX...OHX...HUN...
ATTN RFCS...OHRFC...LMRFC...
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EVENT...SLOW MOVING CELLS
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SATELLITE ANALYSIS AND TRENDS...WEAK SFC FLOW BUT NEARLY 180 DEGREES OF
CONVERGENCE ALONG A SFC TROF AND WEAK UPPER LEVEL WINDS ON THE SOUTHERN
PERIPHERY OF THE UPPER LEVEL CYCLONE AREA LEADING TO VERY SLOW CELL MOTION
ENVIRONMENT FOR MUCH OF TN.  THUNDERSTORMS ALONG A LINE FROM UNION COUNTY
IN NE TN TO BEDFORD HAD DEVELOPED IN AN UNORGANIZED FASHION ON EITHER
SIDE OF THE SFC TROF WHERE MOISTURE CONVERGENCE WAS SIGNIFICANT ENOUGH TO
BREAK THROUGH THE WEAKLY CAPPED ENVIROMENT... PARTICULARLY ALONG RIDGES
AND SLIGHTLY HIGHER ELEVATION.  OVER THE LAST HOUR OR SO THE LINE HAS
BEGUN TO EXPAND AND BECOME MORE ORGANIZED PARTICULARLY AROUND MORGAN SW TO
RUTHERFORD COUNTIES WHERE MULTIPLE CELLS HAVE MERGED AND COOLED TO -60C.
THESE CELLS ARE WITHIN A GOOD MOIST ENVIRONMENT WITH PWS OF AROUND 1.6"
PER SOUNDER... WITH LIMITED DRY AIR ALOFT AND ELS AROUND -60C WHICH
SUPPORT RATES OF 1.5"/HR.  FFG VALUES ARE LOW IN THE NE PORTIONS OF TN
AND WITH MERGING CELLS CAN BE CAPABLE OF RATES OVER 2"/HR...WHICH COULD
LEAD TO TOTALS OVER GUIDANCE VALUES DUE TO THE SLOW MOTIONS.   WITH THE
INFLUENCE OF THE UPPERLOW AND SW FLOW ALOFT... CELLS WILL NOT MEANDER
TOO FAR SE AND COULD BEGIN TO EXPAND...ESPECIALLY AS CELLS ALONG THE SE
FLANK OF THE LINE BECOME BETTER ORGANIZED.
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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 3656 8363 3608 8298 3533 8645 3594 8664
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