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000 FXUS64 KOHX 222332 AFDOHX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NASHVILLE TN 532 PM CST SUN NOV 22 2009 .UPDATE...FOR 00Z AVIATION FORECAST && .AVIATION... UPPER TROUGH CAN BE SEEN ROTATING IN BOTH SATELLITE AND RADAR AS IT WORKS SLOWLY NORTHEAST THROUGH THE AREA. LATEST WATER VAPOR (23Z) WOULD PLACE CENTER OF ROTATION OVER COFFEE COUNTY TN. LOTS OF LOW ETAGE CLOUDS ACROSS AREAS TO OUR SOUTH THAT WILL WORK NORTHWARD TONIGHT. EXPECT A CONTINUED DETERIORATION OF CIGS AND VSBYS THIS EVENING AND OVERNIGHT AT BOTH BNA AND CSV WITH SOME IMPROVEMENT DURING THE AFTERNOON ON MONDAY. LOOK FOR PATCHY LIGHT RAIN/DRIZZLE OVERNIGHT. BOYD && .PREV DISCUSSION... /ISSUED 323 PM CST SUN NOV 22 2009/ DISCUSSION... UPPER LOW IS CURRENTLY IN NRN AL MOVING NEWD. EXTENSIVE CLOUDS CONTINUE OVER THE AREA WITH LIGHT RAIN OVER LOCATIONS IN THE SOUTH AND EAST. PATCHY LIGHT RAIN WILL CONTINUE TONIGHT AND THEN GRADUALLY DIMINISH FROM WEST TO EAST TOMORROW. A BRIEF DRY PERIOD UNTIL THE NEXT H5 WAVE MOVES INTO THE AREA TUE NGT. THEN ANOTHER BRIEF PERIOD OF RAIN TUE NGT AND WED AS THE WAVE TRANSITS THROUGH THE MIDWEST INTO THE GREAT LAKES. THEN A MORE POWERFUL SYSTEM DIVES SEWD ACROSS THE PLAINS AND INTO THE OH/TN VALLEYS ON WED/THU. 850 MB TEMPS WILL DROP FROM THE +4C TO AROUND -5C BY FRI AM. PRECIP WILL BE RAIN OR SHOWERS ON WED NGT AND THU...BUT COULD TRANSITION TO A MIX OF RAIN AND SNOW LATE THU NGT. A STRONG SFC RIDGE WILL MOVE OVER THE AREA ON SAT AS COLD AIR POURS INTO THE MIDSTATE. HIGH TEMPS WILL LIKELY BE SEVERAL DEGREES BELOW NORMAL FOR THE PERIOD FRI TO SUN. CPC 6-10 DAY AND 8-14 DAY PROGS CONTINUE TO SHOW BELOW NORMAL TEMPS FOR THE ERN US. THE DAY10 GFS IS SHOWING ANOTHER LARGE SFC RIDGE MOVING IN ON SUN WITH 850MB TEMPS DROPPING TO -10C ON WED(12/02). && .OHX WATCHES/WARNINGS/ADVISORIES... NONE. && $$
