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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Wednesday
• 
• High: 86 °
• Low: 63 °
• Chance of T-Storms

• Thursday
• 
• High: 88 °
• Low: 63 °
• Chance of T-Storms

• Friday
• 
• High: 88 °
• Low: 64 °
• Clear

• Saturday
• 
• High: 88 °
• Low: 66 °
• Fog

• Sunday
• 
• High: 90 °
• Low: 66 °
• Chance of T-Storms

Area forecast discussion 
National Weather Service Columbia SC 
1118 am EDT Wednesday may 23 2012 


Synopsis... 
upper level trough over the region will slowly move eastward and 
exit the region Thursday night. Weak high pressure and an upper 
level ridge will build in for Friday through the weekend. 


&& 


Near term /until 8 PM this evening/... 
upper level trough remains over the region. Latest visible satellite 
imagery shows the center of the upper circulation over 
upstate SC. The trough will continue tracking eastward today with 
the cold pool aloft also moving through the forecast area...mainly 
over the northern midlands. With this feature further east than 
yesterday and instability also weaker have remained with slight 
chance probability of precipitation for most areas and chance for the northern midlands 
into the Pee Dee area mainly late this afternoon into the early evening. 
Temperatures this afternoon will be in the middle to upper 80s. 


&& 


Short term /8 PM this evening through Friday/... 
tonight...the majority of the upper level trough over the region 
will begin ejecting eastward with the cold pool aloft a bit slower 
to eject. This will keep some clouds over the northern midlands 
with showers and thunderstorms ending this evening with the loss 
of diurnal heating. With some drier air entering the middle and upper 
levels this evening thunderstorms which continue into the evening 
hours could develop some strong and gusty winds. Overall severe 
threat remains low. Temperatures tonight will be in the lower to 
middle 60s. 


Thursday and Thursday night...upper level trough will continue to 
weaken and eject northeastward as weak high pressure begins to 
build into the region. Have remained with slight chance probability of precipitation for 
Thursday afternoon and evening as the remnants of the cold pool 
and upper trough could generate some convective 
activity...especially as temperatures climb toward the 90 degree 
mark. Convective activity will dissipate with sunset and with 
additional drier air moving into the region clouds will diminish 
Thursday night. Overnight lows will be in the middle 60s for most 
locations with a few lower 60s in outlying areas. 


Friday...upper level trough will finally move out of the area as 
the upper level ridge along with weak surface high pressure build 
into the region. Models indicate dry air in the middle and upper 
levels which will lead to a mostly sunny to partly cloudy 
afternoon with highs around 90 for most areas and slightly cooler 
along Lake Shores. 


&& 


Long term /Friday night through Tuesday/... 
few changes made to the long term as models remain in good 
agreement. Upper level ridge will dominate the region along with 
weak high pressure through the weekend and into early next week. 
Chances of thunderstorms will return to the forecast for Tuesday 
as a weak frontal boundary approaches from the northwest. 
Temperatures will be near to slightly above normal through the 
long term with daytime highs in the upper 80s to lower 90s and 
overnight lows in the middle to upper 60s. 


&& 


Aviation /15z Wednesday through Sunday/... 
patchy early morning fog will dissipate by 13z. Expect VFR for most 
of the taf period. 


The upper low overhead this morning will move off to the northeast 
this afternoon. A weak surface trough of low pressure will linger 
across the midlands. Expect isolated to scattered diurnal storms. 
Location and timing difficult to pinpoint...so will not include in 
forecast at this time. Near calm winds early this morning will 
become southwest around 10 miles per hour after 15z. 


Could see patches of MVFR/IFR fog again late tonight with diurnal 
cooling and boundary layer winds decoupling. Have indicated MVFR fog 
at ags/ogb after midnight. 


Extended aviation outlook...MVFR ceiling/visibility possible in scattered 
convection Thursday with an approaching cold front and upper low 
pressure system. 


&& 


Cae watches/warnings/advisories... 
SC...none. 
Georgia...none. 
&& 


$$