Weather

645 
fxus61 krnk 290809 
afdrnk 


Area forecast discussion 
National Weather Service Blacksburg Virginia 
409 am EDT Friday Aug 29 2008 


Synopsis... 
a weak front will approach from the west tonight...slowly 
passing through the region through Saturday night. By Sunday and 
into next week...strong high pressure will build down from the 
Great Lakes into the southern Appalachians. 


&& 


Near term /until 6 PM this evening/... 
wedge is becoming shallow and axis of surface high pressure is just 
west of the Blue Ridge. Models and BUFKIT are showing that low 
clouds should erode from southwest to northeast today. Expect that 
Bluefield and Lewisburg will become scattered a few hours before 
Roanoke and Lynchburg. Of course...amount of clouds will greatly 
influence high temperatures. Will stay closer to warmer mav guidance 
in the west and south...and only around 80 north of Roanoke and 
Lynchburg. 


&& 


Short term /6 PM this evening through Saturday night/... 
fog and stratus may fill back in for most of the area tonight but 
will again mix out during the morning on Saturday. Timing of the 
front approaching from the Ohio Valley is slower on the 00z guidance 
and with little upper support until then will keep chance of rain 
low. Even with the front on Saturday best chance of rain will be in 
the afternoon with the best heating and instability. 


&& 


Long term /Sunday through Thursday/... 
strong upper high over the Great Lakes will allow heat to build 
over parts of the Ohio Valley. Somewhat cooler air will be 
reinforced over our region as an easterly component to the wind 
persists thanks to a strong surface high over the northeast and 
middle Atlantic region. Expect sunny warm days and clear 
comfortable nights through much of this period. 


&& 


Aviation /08z Friday through Tuesday/... 
clouds have filled back in where clouds broke...the lyh to Dan 
corridor overnight. All terminals should at least experience tempo 
IFR ceiling or visible near dawn. With The Wedge departing...and SW winds 
developing....kblf and klwb will break out of the low clouds late 
morning and early PM. Clouds should break again during the morning 
at kdan and in the PM at kroa. Klyh may experience IFR or MVFR 
ceilings for the entire day. 


With abundant low level moisture remaining...IFR/LIFR visible is possible 
at klwb Friday night. Low clouds may also hold on into the night at 
klyh...longer than guidance suggests as SW winds really dont 
develop there until Saturday. Late in the afternoon Saturday and 
into Saturday night...showers will move across the mountains with 
the cold front. These showers will eventually move into the east 
overnight into Saturday morning. With the exception of Mountain 
Valley fog during the overnights...VFR conditions will prevail 
Sunday and into the middle of next week. 


&& 


Rnk watches/warnings/advisories... 
Virginia...none. 
NC...none. 
WV...none. 


&& 


$$ 
Synopsis...air mass 
near term...air mass 
short term...air mass 
long term...js/km 
aviation...km/wp