197 
fxus61 kpbz 061633 
afdpbz 


Area forecast discussion 
National Weather Service Pittsburgh PA 
1230 PM EDT Sat Sep 6 2008 


Synopsis... 
a weakening cold front will bring scattered showers to southeast 
Ohio and northwest Pennsylvania today while showers from the 
remains of Hanna clip the higher elevations southeast and east of 
Pittsburgh. As low pressure from Hanna moves quickly northeast 
tonight showers will end. Temperatures will be seasonal with the 
next chance for rain Monday night. 


&& 


Near term /through Sunday/... 
cold front washing out across northern forecast area with band of 
showers gradually diminishing as convergence weakens along front. 
Area of showers well north of Hanna edging into ridges this morning 
and will continue through this afternoon as remnant low from Hanna 
quickly moves northeast along eastern Seaboard. Heaviest rains will 
stay well east of region. As Hanna low moves northeast tonight 
deeper moisture is swept well east with it and showers will end. 
Weak shortwave will make a run at eastern Great Lakes Sunday with 
moisture and upper support well north of Pennsylvania and only a 
slight chance of showers north of Interstate 80 in grids. 
Temperatures trending back to normal. 


&& 


Short term /Sunday night through Monday night/... 
weak high pressure Sunday night and Monday with near normal 
temperatures. Cold front approaches later Monday night with a 
chance of showers especially in Ohio counties. Near normal 
temperatures to continue. 


&& 


Long term /Tuesday through Friday/... 
frontal system crossing the area Tuesday with chance probability of precipitation spreading 
across the area from west to east. High pressure will bring dry 
conditions for midweek...with the next system affecting the area 
for late week. Little change to extended from previous forecast. 


&& 


Aviation /16z Saturday through Wednesday/... 
showers are diminishing as Hanna pushes to the northeast...and a cold 
front weakens across the upper Ohio Valley. MVFR/IFR conditions are 
persisting southwest PA...with conditions beginning to slowly 
improve across eastern Ohio behind the cold front. Conditions 
will improve by later this afternoon for most areas as the cold 
front pushes to the east. Areas of IFR conditions in fog are 
expected again overnight/early Sunday morning. 


Weak high pressure should provide mainly VFR weather for Sunday and 
Monday. The next cold front will cross the area Monday night and 
Tuesday bringing scattered showers and thunderstorms and the 
potential for restrictions. VFR conditions should prevail Wednesday 
under high pressure. 


&& 


Pbz watches/warnings/advisories... 
Maryland...none. 
Ohio...none. 
PA...none. 
WV...none. 


&& 


$$