Saturday, March 24, 2012

Stepping From June To April

Compared to yesterday, at least as far as temperatures out of the gate are concerned, we're not that much cooler.  Temperatures are generally in the lower and middle 50's in most spots (some 40's scattered in there for measure), which is not far removed from yesterday's foggy start.  The difference between today and yesterday is that skies will gradually increase in cloudiness as the day progresses, mainly from southwest to northeast, and with an east breeze that is in place at the surface and in the lower atmosphere, temperatures will not respond as favorably as they did yesterday when we cracked 80 in Philadelphia just after the backdoor front crossed the region.

Showers and some thunder are not too far away -- radar has them lined up at 6 AM from Southwest Delaware into Central Pennsylvania, moving NE, with a steadier band of rain across Central and Western Pennsylvania this morning.  These showers and rumbles of thunder will move through the region in two rounds -- the first with the lead boundary that's closer to us, the second with the main shield of rain farther west.  While the radar looks impressive this morning, modeling is hinting strongly that some low and mid level dry air will punch some holes in that shield of rain later on -- much of it becoming showery this afternoon and more scattered in coverage.   We will get some amount of shower activity today -- not everyone will get much in the way of rainfall.  Few will see more than a quarter inch of rain today, fewer will see a half inch of rain.  Some will get thunder, others won't.  Best chances for the thunder crew will be west through southwest of town today...and those west of the city might see a bit more rain than those east.

Before this moves in, a few brief glimpses of sun are possible locally -- some at the Shore might get a couple of hours this morning of some sunshine the cloud deck with the storm system moves in.   However, those areas that are more clear this morning have some fog out there to start the day -- that should burn off later on.

Temperatures won't warm as much today -- east wind plus clouds will do us in.  However, 66 in the city for a high, mid 60's for most inland locations, around 60 at the Shore is still very mid April-like and not a bad day by any stretch despite the potential for showers and storms later on.