FXUS64 KOHX 091643
AFDOHX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1043 AM CST WED DEC 9 2009

.UPDATE FOR 18Z TAFS...

&&

.AVIATION...
MAIN IMPACT TO AVIATION WILL BE WIND IN THE FIRST FEW HOURS OF THE
FORECAST PERIOD. WILL MAINTAIN 20 KNOTS GUSTING TO 35 KNOTS FOR
THE FIRST FEW HOURS THEN DIMINISHING BY SUNSET. OCCASIONALLY
BROKEN VFR CEILINGS ALSO THROUGH EARLY EVENING.

&&

.PREV DISCUSSION... /ISSUED 924 AM CST WED DEC 9 2009/ 

UPDATE...
RADAR SHOWING A BAND OF LIGHT PRECIPITATION MOVING ACROSS NORTHERN
MIDDLE TN. PRECIP IS TAKING THE FORM OF VERY LIGHT RAIN SHOWERS OR
SPRINKLES. BAND LOOKS TO BE IN CONJUNCTION WITH THE COLDER
INSURGENCE OF TEMPERATURES WHICH IS EXPECTED TODAY.

FOR THE UPDATE...WILL INCLUDE A FEW MORNING SPRINKLES ACROSS
NORTH CENTRAL SECTIONS AND THE NORTHERN AND CENTRAL PLATEAU.
ALSO...WILL AMP UP GUSTS AS GUSTS TO 40 MPH AND EVEN HIGHER...HAVE
ALREADY BEEN REPORTED. 

OTW...WILL CHANGE SKY COVERAGE TO PARTLY SUNNY. SAT REVEALS A
CLEARING TREND OVER WESTERN TN BUT ADDITIONAL CLOUDINESS TO THE
WEST AND NORTH.

WIND ADVISORY TO CONTINUE THROUGH 2PM. WILL UPDATE AT THAT TIME IF
WE ALLOW THE ADVISORY TO TERMINATE.

PREV DISCUSSION... /ISSUED 548 AM CST WED DEC 9 2009/ 

UPDATE...FOR 12Z AVIATION FORECAST

AVIATION...
STRATOCU DECK LAYING DOWN ACROSS NORTHWEST MIDDLE TENNESSEE HAS BEEN
SLOWLY MOVING THIS WAY. HAVE BROUGHT BKN STRATOCU LAYER IN AFTER
14Z AT BNA AND AFTER 16Z AT CSV. MAIN CONCERN WILL BE WINDS. EXPECT
SUSTAINED 20 KT SOUTHWEST WINDS WITH GUSTS TO 35 KTS THROUGH THE
DAYLIGHT HOURS AS DEEP SURFACE AND UPPER LEVEL LOWS PULL NORTH
WITH VERY TIGHT SURFACE PRESSURE GRADIENT IN PLACE WITH PLENTY OF
DOWNWARD TRANSPORT OF MOMENTUM.

BOYD

PREV DISCUSSION... /ISSUED 252 AM CST WED DEC 9 2009/ 

SHORT TERM...(THRU FRI)
CURRENT...RAIN HAS EXITED REGION. FIRST FRONT WENT THRU BNA ARND
07Z...AND SECONDARY FRONT WITH COLDER AIR EXPECTED BNA AROUND 12Z.

TEMPS AND CLOUDS RATHER TRICKY IN NEAR TERM. MAX TEMPS SHOULD BE
REACHED EARLY BNA WWD...AND RISE A DEG OR 2 BEFORE FALLING TO THE E.
NOT VERY IMPRESSIVE CLOUD DECK TO OUR NW...WITH SCT-BKN CLOUDS FOR
MOST PART UNTIL OVERCAST CNTRL MO. MODELS FORECASTING QUITE A BIT
OF LO LEVEL MOISTURE AND OCCASIONAL OVERCAST SKIES. WILL GO FOR
MORE CLOUDS N AND E SECTIONS GRADUALLY CLEARING FM SW. WILL
CONTINUE WITH WIND ADVISORY WITH W WINDS OCCASIONALY GUSTING TO 35 MPH.

THU WILL BE A SUNNY DAY BUT QUITE COLD AS ARCTIC HI CNTR MOVES TWD
CWA...AND WILL RESIDE OVER AREA THU NITE WITH VERY COLD TEMPS
EXPECTED.

LONG TERM...
NEXT CHANCE FOR PRECIP FRI NITE INTO SUN. LO PRES CNTRL GLF CST
SAT MOVES NE AND DEEPENS OVR SRN ATLC. MOST PRECIP WILL HOLD OFF
TO OUR S AND E...BUT WILL GO WITH 20-40% POPS...HIEST CHANCES SAT.
COULD BE A SNOW MIX AT START...MAINLY N AND E.

NEXT FRONT SHOULD BE HERE MON NITE OR TUE. WENT WITH LO POPS FOR
NOW.

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY UNTIL 2 PM CST THIS AFTERNOON FOR TNZ005>011-
022>034-056>066-075-077>080-093>095.

&&

$$

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