Thursday, December 22, 2011

Mild Day In Between Rains

We almost broke a record high last night in Philly as it got up to 63 degrees during the evening hours, with yesterday's record of 66 almost getting breached.    It will be mild again today as last night's cool front didn't have much cool air in the wake of the front crossing the region.  It did have thunderstorms though, passing through the northern suburbs after 10 PM and bringing some briefly strong wind gusts to over 40 mph...reaching as high as 60 mph in Trenton just after 10 PM as the line zipped on through.  The only change those winds brought was a shift in direction -- they will blow from the west and west-northwest today as temperatures really don't drop much from yesterday.   Those breezes should be around 10 mph this afternoon.

We're expecting highs generally in the upper 50's today in the region -- 58 is our prediction for Philadelphia.  Today is the transition day between systems as the second wave of this week's wave train lines up for the region for tonight and early tomorrow morning.   This system should bring more rain to the region than yesterday's, with a swath of one inch rainfall expected to fall along I-95 and just northwest across the Pennsylvania suburbs.  Rains should arrive this evening, fall at their heaviest rates just after midnight, and taper off in the early morning hours on Friday from southwest to northeast.  We could see rain end as a few snowflakes north of Blue Mountain early tomorrow morning (they could get a coating to an inch above 1500 feet in elevation) but snow is not likely here in the city or suburbs.  This second wave will do what the first didn't -- bring in cooler air.