FXUS64 KOHX 100442
AFDOHX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1042 PM CST WED DEC 9 2009
.UPDATE...FORECAST IS IN GOOD SHAPE. WE WILL ISSUE AN UPDATE
BEFORE MIDNIGHT TO REMOVE THE EVENING WORDING. GRADIENT WIND STILL
KICKING UP OVER 20 MPH AT TIMES. WINDS WILL GRADUALLY SUBSIDE
INTO THE 10-15 MPH RANGE LATE TONIGHT. SATELLITE AND OBS INDICATE
A GOOD DEAL OF HIGH CLOUDS OVER THE AREA...AND SOME LOW CLOUDS
ACROSS OUR NORTH TIER. THESE CLOUDS WILL BE DECREASING GENERALLY
WEST TO EAST THROUGH THE NIGHT AS TEMPERATURES FALL THROUGH THE
20S.
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&&
.PREV DISCUSSION... /ISSUED 326 PM CST WED DEC 9 2009/
DISCUSSION...
SFC LOW OVER MI WILL CONTINUE TO MOVE EASTWARD AS THE ARCTIC OVER
THE CENTRAL PLAINS MOVES OUR WAY. GRADIENT TO BEGIN DECREASING THIS
AFTERNOON AND INTO THIS EVENING. SFC HIGH WILL BE NEAR THE ARKLATEX
BY 12Z THU SO LOOK FOR THE WEST AND NORTHWEST WINDS TO CONTINUE IN
THE 10-15 MPH RANGE WITH GOOD CAA CONTINUING.
SAT IMAGERY SHOWING THAT THE LOW CLOUDINESS WITHIN THE POST FRONTAL
SECTOR IS RATHER EXTENSIVE. BUT...GIVEN THE NORTHERLY TRACK OF THE
UPPER LOW...THESE LOW CLOUDS WILL STAY WELL NORTH OF TN.
SFC HIGH WILL MOVE OVER MIDDLE TN ON THU AFTERNOON. 850 MB TEMPS
WILL REMAIN IN THE -6C TO -12C RANGE SO HIGH TEMPS WILL STRUGGLE TO
REACH THE UPPER 30S NORTH AND LOWER 40S SOUTH.
BY 12 FRI...SFC HIGH IS OVER EAST TN. THIS WILL SET THE STAGE FOR
THE COLDEST NIGHT THUS FAR ON THU NT. WILL GO BELOW THE MAV GUIDANCE
AND INCLUDE MIN TEMPS GENERALLY IN THE 15 TO 22 DEGREE RANGE. EVEN
COLDER READINGS WILL BE POSSIBLE FOR LOW LYING AREAS.
A WARMING TREND WILL BEGIN ON FRIDAY AFTERNOON AND INTO THE
WEEKEND.
IN THE EXT FCST...GULF LOW TO DEVELOP AND SPREAD MOISTURE AND A
CHANCE OF RAIN TO THE NORTH ON SATURDAY.
ANOTHER FRONTAL SYSTEM WILL MOVE THROUGH ON TUESDAY WITH A CHANCE OF
SHOWERS ALONG AND IN ADVANCE OF THAT SYSTEM. COLDER AIR WILL WORK IN
BEHIND THAT SYSTEM AS A 1043 MB HIGH BUILDS SE FROM CANADA. EURO
SOLUTION IN AGREEMENT WITH BRINGING A COLD AIRMASS SOUTHWARD TOWARD
THE LAST HALF OF NEXT WEEK.
21
&&
.OHX WATCHES/WARNINGS/ADVISORIES...NONE.
&&
$$
