Discussion:
Sunday AM: 12/9/07
A very Unsettled period is on tap for the entire Delaware Valley this week. Milder temperatures will return, especially towards Midweek. A series of weak low pressure systems, will develop over the Mississippi Valley and move ENE, along a stalled out front, which will be draped over the Region. At times this frontal boundary will move north of the area, as these waves of low pressure, kink the front northward.
This will allow the advancement of much milder air to our south to move in. Some areas South of PHL, could reach 55 to 60 degrees, for both Wednesday and Thursday. This will be most likely in Extreme Southern NJ, and DE. There will be some breaks from this Rain, especially Later Monday into early Tuesday, and then again on Wednesday.
The strongest of these Low Pressure System's, will move in on Thursday. Rain will be the rule, and Milder air will overspread the entire area, as this Low passes to our NW, near Central PA. After this storm system passes, a NW flow of Cooler air will return for Friday. The stalled out front, and mild weather, will finally be shoved to our south, and Offshore on Friday.
A much Colder weather pattern is likely to return for next weekend, as CAA (Cold Air Advection) will be the rule, and temperatures will return to more Seasonable conditions. Highs will be closer to 40, and Lows in the 20's for both Saturday and Sunday.
I'll update on Tuesday, as there's some uncertainty for Wednesday Night into Thursday. Enough cold air could filter in Wednesday night, for this precip to start as sleet or Freezing rain, especially North of PHL.
A coastal threat for next weekend (Saturday night into Sunday) is now showing up with some models. Enough cold air should be in place next weekend, so this storm would be Snow. Stay tuned for this one !
Ruggie Weather's Weekly Outlook:
Monday 12/10 through Friday 12/14
For the Delaware Valley:
Tonight:
Cloudy and cold with rain developing this evening, possibly mixed with Freezing rain, and Sleet in the Lehigh Valley. Rain overnight in all areas. Lows in the low to mid 30's, N & W of PHL.
Lows in the mid to upper 30's from PHL, S & E.
Monday:
Cloudy with Rain Likely during the morning Hours, then remaining M.Cloudy in the afternoon. A few breaks of sunshine possible later in the Day. Milder with Highs in the Mid 40's N & W of PHL. Highs In the Upper 40's to lower 50's, S & E of PHL.
Monday Night:
M.Cloudy Skies and Cold. Lows in the low to mid 30's.
Tuesday:
Mainly Cloudy and Milder, with Rain developing during the afternoon, and continuing for Tuesday Night. Highs in the Upper 40's to mid 50's. Lows Tuesday Night Near 40.
Wednesday:
P.Cloudy and Continued Mild, A chance of Some Showers. Highs in the Upper 40's. to low 50's
Lows in the low to mid 30's.
Thursday:
Cloudy with Some Rain and Mild. Highs in the Upper 40's to low 50's
Friday:
M.Cloudy with a few scattered showers, becoming breezy and cooler. Highs in the mid to Upper 40's
Take Care,
Ruggie
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