143 
FXUS64 KOHX 061547
AFDBNA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
947 AM CST FRI DEC 6 2002

CURRENTLY, AXIS OF HIGH PRESSURE IS CREEPING CLOSE TO THE MID STATE, 
AND SHOULD PASS OVER TODAY, BRINGING LIGHT RETURN FLOW. REGARDLESS, 
IT IS COLD, WITH SNOW COVER OVER THE HIGHLAND RIM FURTHER RETARDING 
DIURNAL WARMING THERE. ALL MID STATE STATIONS WERE RUNNING 21-27 
DEGREES AT 15Z, WITH SOME LOW CLOUDS STILL HANGING OVER THE PLATEAU.

MORNING SOUNDING FROM OHX SHOWS A VERY DRY ATMOSPHERE IN PLACE, WITH 
PRECIPITABLE WATER ONLY 0.26 INCHES, AND MOST OF THAT TRAPPED IN THE 
SURFACE TO 890 MB LAYER. SOUNDING ALSO SHOWS A STRONG ELEVATED 
INVERSION BETWEEN 890 AND 810 MB.

12Z UPPER AIR ANALYSES SHOW A HIGHLY AMPLIFIED FLOW OVER THE U.S., 
WITH A LONGWAVE SLIDING TOWARD THE EAST COAST TO BE REPLACED BY A 
STRONG RIDGE PRESENTLY ALIGNED OVER THE WESTERN STATES. POLAR FRONT 
JET REMAINS SOUTH OF MIDDLE TENNESSEE, ALLOWING ARCTIC AIR MASS TO 
REMAIN ENTRENCHED OVER THE AREA.

LOOKING AT THE FORECAST, WITH TEMPERATURES SLOW TO WARM OVER THE 
HIGHLAND RIM DUE TO SNOW COVER, AND OVER THE PLATEAU DUE TO CLOUD 
COVER, WILL UPDATE THE FORECAST SHORTLY TO LOWER AFTERNOON HIGH 
TEMPERATURES THERE. ALSO, WILL REFLECT WINDS SHIFTING TO THE 
SOUTHWEST THIS AFTERNOON.

.BNA...NONE.

ROSE