Thursday, September 29, 2011


That low pressure center that has been rotating over the southern Great Lakes for that past week was still only as far east as central Ohio this morning! But that system will finally open up aloft, cross the Ohio Valley & exit to our northeast across PA by evening. This, thanks to another strong trough developing over eastern US backed by the cold Canadian polar front timed to bring significantly colder air into our area Friday into the weekend. Ahead of the front, sufficient daytime heating will trigger some severe weather this afternoon & evening for many of our neighboring forecast areas. However, we're not expecting much in the way of severe weather for the mountain state today...

Remnants of that low pressure system lending to a few light mountain showers today. Otherwise, we actually have another nice day on tap as surface winds gradually shifting from the northwest today! Highs will reach 70 with a few peaks of sunshine in between a few mid & high level clouds. That strong cold front will start to  bring breezy conditions, lower cloud cover, scattered rain showers and much cooler temps to our area with sunset. Any storms that do fire will be capable of producing isolated hail briefly before things settle down after midnight. We'll keep lows tonight in the lower 50s.

Friday...breezy conditions & widespread rain showers will linger throughout much of the day as that deep trough & cold front gain a strong foothold on nearly the entire eastern/southeastern US! Daytime highs will be limited by heavy cloud cover and all that cold air mixing into the region. So look for temps to top out in the mid/upper 50s.

Mostly cloudy skies & scattered rain showers will linger into Saturday afternoon. New rainfall amounts are not expected to exceed one inch over the next three days. Temps will really bottom out Friday night & Saturday night! Lowlands will see temps falling into the low 40s Friday night & mid to upper 30s Saturday night! Expect any lingering precip during this time to change to snow in the higher elevations above 3500 feet.  

Strong high pressure associated with that cool, dense Canadian air will start drying things out from west to east Saturday evening. Temperatures will rebound to a more seasonal feel with highs near 70 again by Monday. High pressure will keep a dry forecast through next week with plenty of sunshine during the day.

Images depict our 3-day rainfall totals & cold air advecting into eastern US Friday night!!