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Posted at 11:30 AM ET, 12/ 7/2009

Forecast: Two more wintry threats to watch

By Dan Stillman

Precipitation chances target late Tues./Wed. & weekend

* Report your snowfall total to CWG | View submitted snow totals *
* Current temps, clouds & more: Weather Wall | Storm photos *


Today: Partly sunny to mostly cloudy. Mid-40s. | Tonight: Partly cloudy. Upper 20s to low 30s. | Tomorrow: Partly to mostly cloudy. Low-to-mid 40s. Tomorrow Night: Wintry mix possible. | A Look Ahead | Get Express Forecast by E-mail


Winter made its grand entrance on Saturday with a snow that was more than conversational for some areas, but nowhere near crippling. The week-ahead forecast brings two more chances for wintry weather. The first comes Tuesday night and Wednesday as a potent storm coming out of the central U.S. could mean a wintry mix changing to rain. As for the second... could it be two snowy weekends in a row?

Freshly fallen snow brightens the scene around the National Cathedral on Saturday. By CWG photographer Ian Livingston.

Today (Monday): Still some patches of ice here and there during the early morning. Otherwise, sky cover ranges from partly sunny to mostly cloudy. Highs should reach the mid-40s most spots, though clouds could limit some locations to the low 40s. Overall, a quiet weather day with, in some places, leftover snow on the ground to remind us of our eventful Saturday. Confidence: Medium-High

Tonight: Evening temperatures drop into the 30s, then down to overnight lows from the upper 20s (suburbs) to low 30s (downtown) under partly cloudy skies. Winds remain light. Confidence: High

Keep reading for the forecast through the weekend. And if you haven't already, join us on Facebook and follow us on Twitter.

Tomorrow (Tuesday): High pressure should keep us dry for the daylight hours. But partly to mostly cloudy skies signal our next storm system, which will be approaching from the west. High temperatures? Looks like low-to-mid 40s. Confidence: Medium-High

Tomorrow Night: Precipitation is likely to arrive during the evening and last through the night. Snow, ice and rain are all possibile as lows dip to the low-to-mid 30s, with the northern and western suburbs having the best chance for snow or ice. More details to come as we get closer. Confidence: Low-Medium


Any snow or ice would mostly likely change to rain by Wednesday morning. Regardless, the a.m. commute is likely to be a slow one. The rain could end as early as around midday with brightening skies possible in the afternoon and highs in the 40s to near 50. Confidence: Low-Medium

The circulation behind our Tuesday night/Wednesday storm threatens breezy conditions for Thursday with lighter winds on Friday. Highs only in the upper 30s to mid-40s both days set the stage for chilly Thursday and Friday night lows in the 20s, maybe some teens in the suburbs if winds are light enough and skies aren't too cloudy. Confidence: Medium

We have some early signs that a coastal storm could develop and bring the area another wintry threat sometime over the weekend. Way too early to say for sure whether the storm will indeed come to fruition and what its track and impacts would be. Confidence: Low

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By Dan Stillman  | December 7, 2009; 11:30 AM ET
Categories:  Forecasts  
Save & Share:  Send E-mail   Facebook   Twitter   Digg   Yahoo Buzz   StumbleUpon   Technorati   Google Buzz   Previous: Forecast: Winter wonderland to melt away
Next: The snowy legend of Dec. 5 continues


Snow lovers Crystal Ball? :)

Posted by: samdman95 | December 7, 2009 6:13 AM | Report abuse

Howard Bernstein on Ch. 9 this morning seemed to be hedging that the Tues/Wed event may be only icy far west, like Garrett County. Didn't commit to it, but said he felt a little better about this right now. From what I've seen, this system seems to be tracking far west of us which would seem to limit the amount of cold air damming. But, what do I know?

As for weekend, right now storm looks to be suppressed. Maybe flurries or a dusting.

Posted by: ThinkSpring | December 7, 2009 7:24 AM | Report abuse

Not ready to say much with high confidence, either. While everyone in the metro area has a chance to see mixed precip Tuesday night, it's the north and west suburbs that have the best chance of seeing temps flirt with freezing during that time. Unless things shift a bit between now and then, may have to go far north and west to see any iciness during the heart of the Wednesday morning rush, as I think warmer air is likely to change everyone over to rain by or before sunrise. -Dan, CWG

Posted by: CapitalWeatherGang | December 7, 2009 10:13 AM | Report abuse

I can't seem to view the snow total reports. All I see is the map without the submitted totals.. Perhaps you can look into this..?.. Thanks.

Posted by: ZmanVA | December 7, 2009 10:25 AM | Report abuse

As for the weekend, our biggest storms can look suppressed south or out to sea several days out. There's just really no way to say at this point, except that some of the ensemble guidance indicates its worth keeping an eye on. -Dan, CWG

Posted by: CapitalWeatherGang | December 7, 2009 10:31 AM | Report abuse

I'm thinking temps will be too high for this mid-week storm. Expecting a soaking wet rain storm with this one.

Posted by: PoorTeacher | December 7, 2009 10:35 AM | Report abuse

Is that a healthy bit of snow appearing in the burb's on the radar as of 10:43am?

Posted by: stinkerflat1 | December 7, 2009 10:45 AM | Report abuse

I'm hoping there is no major icing... but the hpc ice map is looking a bit concerning. Looking forward to CWGang updates on this.

Posted by: spgass1 | December 7, 2009 10:55 AM | Report abuse

Yikes - should I be worried about getting to BWI on Weds a.m. by 8 (from the district)?

Posted by: dcnative71 | December 7, 2009 11:26 AM | Report abuse

Most of the area should not see much from the midweek event in my opinion, winds off the ocean are not conducive for much icing etc. Elevations to the west and north could be a different story overnight.

GFS came north with weekend threat -- not totally surprising, but it will keep bouncing around. Tries to dislodge cold but looks like another wet snow for some at the least.. details and reality still to be worked out.

Posted by: Ian-CapitalWeatherGang | December 7, 2009 11:35 AM | Report abuse

Reminder: The midweek storm was originally supposed to be 62F with rain. The temp drop to mid-forties occurred only after Saturday's snowstorm.

Since the storm center is far to our west I'm rather mystified about all these predictions of "wintry mix" tomorrow night. I think nearly everything east of the Blue Ridge will be rain, though high easterly winds could make things rather nasty, especially around Ballston where high buildings seem to create mini-tornadoes with the slightest breeze. I've had umbrellas wrecked around Ballston when there was only a breeze anywhere else.

Posted by: Bombo47jea | December 7, 2009 12:33 PM | Report abuse

@Bombo47jea: at the upper levels it will be all rain (1500m and higher). It's at the lower levels where both the GFS and NAM are pointing to cold air damming basically being wedged in.

Personally, I think you can draw a line down Rt. 15 (or maybe even Rt. 340), with locations to the west getting a lot more wintry precip than to the east. The closer you get to I-95 (and the coast), the less there's going to be from a frozen precip standpoint...

Posted by: hobbes9 | December 7, 2009 2:05 PM | Report abuse

I'm agreeing with Poor Teacher on the mid-week storm. I think as the front pushes through, we'll likely see increased temperatures which will support one of those miserable winter rains which no one enjoys except the lawn.

The weekend? Ha! Most guys can't predict tomorrow's weather. Predictions about next weekend are closer to a clive cussler novel...

Posted by: Skeptic1 | December 7, 2009 3:51 PM | Report abuse

I can't see the snowfall totals nor can I submit my own total. It says error on page in both cases. Someone else has reported the same problem in your comments.

Posted by: Clio2 | December 7, 2009 4:37 PM | Report abuse

At least we now have the possibility of snow to talk about. Three frozen preci. events in a week?
Say it isn't so ;-)

Posted by: bodyiq | December 7, 2009 8:26 PM | Report abuse

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