260
FXUS64 KOHX 202354
AFDOHX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
554 PM CST FRI NOV 20 2009
UPDATE
FOR 00Z AVIATION FORECAST
AVIATION
THIN CIRRUS WIDESPREAD ACROSS THE AREA THIS EVENING EXPECTED TO
REMAIN OVERNIGHT AND INTO SATURDAY. EXPECT VFR CONDITIONS EXCEPT
FOR A BRIEF PERIOD AROUND DAYBREAK SATURDAY AS FOG DEVELOPS NEAR
LAKES AND RIVERS POSSIBLY REDUCING VSBYS BELOW 3 MILES BRIEFLY AT
BOTH BNA AND CSV. LOW PRESSURE SYSTEM WORKS SLOWLY EASTWARD ALONG
GULF COAST NEXT 24 HOURS WITH MODELS IN AGREEMENT IN KEEPING PRECIP
SOUTH OF TEMINAL SITES THROUGH 00Z SUNDAY.
BOYD
PREV DISCUSSION
/ISSUED 349 PM CST FRI NOV 20 2009/
DISCUSSION...SURFACE MAP AT 21Z SHOWS HIGH PRESSURE RIDGE
CENTERED OVER MIDDLE TENNESSEE, WITH CIRRUS BLOW-OFF FROM THE
SYSTEM IN THE GULF OF MEXICO. TEMPERATURES HAVE WARMED INTO THE
60'S MOST AREAS UNDER ABUNDANT SUNSHINE AND DRY LOW-LEVEL AIR.
MODELS SHOW HIGH CENTER RETREATING NORTHEASTWARD DURING THE NEXT
COUPLE OF DAYS AS THE AFOREMENTIONED GULF SYSTEM COMES ASHORE AND
BEGINS TO INFLUENCE OUR WEATHER. MODELS ARE IN SLIGHT
DISAGREEMENT OVER THE PLACEMENT OF THE UPPER LOW BY 12Z SUNDAY,
WITH AN ENSEMBLE APPROACH PLACING THE CENTER NEAR THE TN/MS
BORDER.
AT ANY RATE, WE CAN EXPECT A WARM FRONT TO PUSH THROUGH MIDDLE
TENNESSEE SUNDAY AND SUNDAY NIGHT, BRINGING A HIGH PROBABILITY OF
RAINFALL BEFORE THE SYSTEM PULLS EAST.
AFTERWARD, A FAST-MOVING COLD FRONT WILL BRING ANOTHER CHANCE OF
RAIN ON TUESDAY. THEN LOOK FOR HIGH PRESSURE AND COOLER WEATHER
THE REMAINDER OF THE WEEK.
OHX WATCHES/WARNINGS/ADVISORIES
NONE.
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