FXUS64 KOHX 101723 AAB
AFDOHX

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE NASHVILLE TN
1123 AM CST THU DEC 10 2009

.UPDATE...
WITH CURRENT TEMP TRENDS BELOW CURRENT FORECASTED VALUES...
CONTINUATION OF COLD AIR ADVECTION PATTERN IN PLACE THRU THE
AFTERNOON HOURS...AND IN AGREEMENT WITH SURROUNDING OFFICES...
WILL LOWER AFTERNOON HIGH TEMPS ACROSS THE BOARD BY A COUPLE
OF DEGREES.
&&

.PREV DISCUSSION... /ISSUED 949 AM CST THU DEC 10 2009/ 

.UPDATE...
CURRENTLY...TEMPS SPANNING THE 20S...WITH DEWPOINTS IN THE MID
TEENS...WITH LOWEST READINGS FOR BOTH ACROSS THE CUMBERLAND
PLATEAU REGION. WINDS GENERALLY NWLY AT 10 TO 15 MPH. 12Z KOHX
SOUNDING SHOWING DRY CONDITIONS SFC AND ALOFT WITH PCPN WATER
VALUES ONLY AROUND 0.22 INCH. HOWEVER...CU WITH LITTLE VERTICAL
EXTENT DEVELOPING ACROSS THE MID STATE. STRONG SFC HIGH PRESSURE
POSITIONED ACROSS THE ARKLATEX REGION...WITH SLIGHT SWLY ORIENTATION
IN UPPER LEVEL FLOW.

APEX OF HIGH PRESSURE WILL MOVE E AND INTO W PORTIONS OF THE MID STATE
..WITH UPPER LEVEL FLOW BECOMING MORE ZONAL IN NATURE...BY 00Z FRI.
CONTINUE TO EXPECT LITTLE CHANGE IN ATMOSPHERIC MOISTURE CONTENT THRU
THIS AFTERNOON...BUT WITH DIURNAL AFFECTS ALREADY PRODUCING
CU...WILL UP SKY CONDITIONS TO MOSUNNY ALL LOCATIONS. ALSO BELIEVE
TREND OF NWLY WINDS CURRENTLY BEING EXPERIENCED WILL LAST THRU
MAJORITY OF AFTERNOON...AND WILL ALSO UPDATE FOR NWLY WINDS ALL
LOCATIONS...BUT KEEP WIND SPEEDS IN THE 10 MPH TO 20 MPH RANGE.

AS FOR TEMPS...CURRENT TEMPS RUNNING A FEW DEGREES BELOW
FORECASTED VALUES...BUT STILL GENERALLY IN RANGE OF FORECASTED HIGHS.
WILL MONITOR SITUATION FOR POSSIBLE LATER UPDATE AS THE NOON HOUR
APPROACHES IF TREND CONTINUES OF TEMPS BELOW FORECASTED VALUES.

.PREV DISCUSSION... /ISSUED 543 AM CST THU DEC 10 2009/ 

.UPDATE...FOR 12Z AVIATION FORECAST

.AVIATION...
SKIES HAVE CLEARED ALL AREAS EXCEPT NORTH END OF PLATEAU INCLUDING
CSV. BELIEVE CLOUDS WILL SCATTERED ALONG PLATEAU AROUND 1430Z. HIGH
PRESSURE BUILDING ACROSS AREA DURING THE DAY WILL HAVE ENOUGH PRESSURE
GRADIENT TO KEEP WINDS SUSTAINED AROUND 10KTS WITH A FEW GUSTS TO
18KTS DURING DAYLIGHT HOURS. 

BOYD

.PREV DISCUSSION... /ISSUED 257 AM CST THU DEC 10 2009/ 

.DISCUSSION...
CURRENT...SOME LO CLOUDS LINGERING ACROSS NE PORTIONS...BUT SHOULD
BE OUT OF AREA NEXT HR OR 2. TEMPS QUITE COLD...IN MID 20S FOR
MOST PART.

COLD HI PRES CURRENTLY CENTERED OVER SRN PLAINS WILL BUILD E AND
BE CENTERED OVER CWA TONITE...WITH TEMPS EXPECTED IN TEENS TO NEAR
20 FOR LOWS TONITE. SAID HI PRES WILL BE MAIN INFLUENCE INTO FRI NITE.

SAT A LO PRES DEVELOPS ALONG GLF CST AND MOVES NE INTO SRN ATLC
SAT NITE. WENT FOR 30-40 POPS SAT INTO SUN WITH ATLC FETCH AND
WEAK WARM AIR ADVECTION PATTERN. 20 POP FOR SUN NITE AND MON.

MON NITE GOOD COLD FRONT COMES ACROSS AS A 1040 MB HI PUSHES E OUT
OF CANADA. 50 POPS FOR MON NITE...AND CONTINUED CHANCE RN E EARLY TUE.
FALLING TEMPS ON TUE.

WED AND THU FAIR AND COLD.
&&

.OHX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$
31/JBW