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YOUR NWS FORECAST


Saturday, November 21, 2009

Looks Like A Little Rain For Monday

Thanks to a slowing down of the upcoming rainmaker for Monday thanks to high pressure holding in place a bit longer than originally anticipated, we should ultimately end up with a very nice November weekend around the Delaware Valley. Sunday may feature a bit more cloudiness during the afternoon but at this point we should remain dry through Sunday and into Monday.

Monday's system is getting a sheared out appearance in the computer models, coming at us a bit weaker and not as well organized as prior computer runs had it. However, with high pressure located to the north and northeast of us we could see some breezy conditions at times Monday and Monday night, especially along the coast. The high just east of Nova Scotia (see map below) is quite strong and will help create the east/northeast fetch...which could result in some minor tidal flooding at the Jersey Shore. Right now, it does not look like an Ida repeat as this storm system looks (right now) much weaker across the spectrum of computer models and the trend has been to keep this system weak as it moves off the East Coast and out to the Atlantic.

The models also are not optimistic with rainfall totals. The GFS is probably the most aggressive, spitting out between 1/4" and 3/4" across the region, with the EURO painting a bit less (weaker system and less energy than the GFS thinks will happen). The EURO is also quicker with the system departing the region, having it exit stage right late Monday night whereas the GFS wants to leave the energy lingering around into Tuesday.

Thanksgiving, which I'll detail more later this weekend, still looks like it could be a bit rainy as we have a pair of systems (southern energy combined with a low dipping southeast through the Lakes) trying to hook up for a stronger storm system. If the phase (hook up) takes place, we could see a decent storm system take shape that could pull colder air down than the cooler weather advertised for Friday and Saturday. Snow chances on the backside of this potential storm are limited more or less to the Poconos and Central Pennsylvania mountains (and places northeast of that) and snow chances look to be limited to late Thursday night into Friday if the stronger storm solution takes shape.







Friday, November 20, 2009

November 21st and 22nd, 2009 Forecast

Now: It's become a pretty nice afternoon in the Delaware Valley despite the gusty breezes from the west. Temperatures have climbed back into the mid and upper 50's in Philadelphia with a healthy dose of sunshine. The upcoming weekend will generally be nice but we could see some increase in clouds on Sunday in advance of a system that may ride up the coast.

Tonight: Winds will diminish after sunset and skies will remain mostly clear overnight. Temperatures will drop off into the 30's outside of Philadelphia to the low 40's in Center City.

Saturday: For mid/late November, the weather couldn't be much better! Temperatures should top out in the mid and upper 50's areawide with mostly sunny skies and light winds from the west and northwest.

Saturday Night: Clear, cool, and close to average. Temperatures will bottom out in the 30's to low 40's with light winds from the north to northeast.

Sunday: Sunday should start with some sunshine but clouds may increase during the afternoon. It's possible some rain may move towards the region but computer guidance (as of this afternoon) seems to be backing away from that. High temperatures will be in the mid 50's.



Model uncertainty: A colder regime seems to be in the offing for Thanksgiving weekend but we're a ways off of that happening. Until then, a couple of systems could bring us rain on Monday and again Wednesday into Thursday. With the uncertainty in place, I'll bring an update on Monday's rainfall chances at some point during the weekend.







Sesame Street Weather

It's been 40 years and two weeks since the dawn of Sesame Street on PBS but the long-running children's show has had a way of bringing Grover and Weather Together for the two's and three's in your life.



Or, should you wish to be like Moscow and manipulate the weather, you may relate to this clip about Grover's amazing weather machine.









Thursday, November 19, 2009

MarathonCast: Cool But Decent Running Weather

The 16th running of the Philadelphia Marathon is this Sunday along the Ben Franklin Parkway, Kelly Drive, and through the City. The weather for the marathon looks, at this point anyways, to be pretty decent. Skies will be partly cloudy and we should see temperatures in Center City start around 43 degrees, increasing during the race through the mid and upper 40's. Winds should be light, generally from the east and northeast at 5-10 mph.

While cool, it is warmer than last year's race and should make for decent race weather.









November 20th, 2009 Forecast

Now: A weak storm system is moving through the East, bringing some showers and occasional rain to the region for tonight and tomorrow. The pattern will become a bit more active over the coming days as another storm system will be on the way for the end of the weekend. Temperatures today are a nudge milder than the past two days, generally with temperatures approaching 60 in much of the region.

Tonight: About a quarter of an inch of rain is expected overnight as occasional showers and light rain move through the region. Higher amounts are possible northwest of the city, lighter rainfall totals possible southeast. With decent upper level dynamics and some instability, a rumble or two of thunder is not out of the question as well as some storms in Virginia this afternoon are producing lightning (you can check out the lightning graphic on our current weather page for more information). Clouds and a general mild flow aloft will keep temperatures up overnight, with low temperatures only dropping into the low and mid 50's from the city on south. Upper 40's are possible to the northwest.

Friday: Early morning showers will depart, leaving us with a sky that may become progressively sunny as the day wares on. Temperatures should approach 60 during the afternoon with west winds around 10 mph drying us out.


Weekend Sneak Peek: It looks like Saturday will be a very nice day with temperatures in the mid and upper 50's around the area. Sunday will start nice but should become more cloudy in the afternoon as a storm system rides up the coast. Rain may be possible late in the day Sunday but a better chance of rain is expected Sunday night into Monday.

Coming Later Tonight: A bit more detailed look at the weather for the Philadelphia Marathon.

In Case You Missed It: NBC 10 and 6 ABC's winter forecasts from last night.