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Posted at 3:15 PM ET, 12/ 7/2009

PM Update: Next storm arrives late tomorrow

By Ian Livingston

Quiet & chilly through Tues. afternoon; then a wintry mix?

* Winter Storm Watch Tues. night N&W (MoCo, LoCo, Fauqier; map) *
* Snowy legend of Dec. 5 continues | Report snow | View snow totals *
* Outside now? Radar, temps & more: Weather Wall | Traffic *

A fair amount of cloudiness has helped keep temperatures from rising too far today, but a south wind and diminishing snowpack has allowed it to warm a bit. Most spots are reaching highs from near 40 into the mid-40s this afternoon, still a good 5 to 10 degrees below normal for the date. Things remain quiet and chilly through much of the day tomorrow before the next storm arrives.

Temperatures: Current area temperatures. Powered by Weather Bonk. Map by Google. Hover over and click icons for more info. Click and hold on map to pan. Refresh page to update. See map bigger on our Weather Wall.

Through Tonight: A few breaks in the clouds are possible, so I'll call it partly to mostly cloudy. Lows are probably a smidge warmer than recent but still cold with a range from the mid-20s to around freezing.

Tomorrow (Tuesday): Some early breaks in the clouds should fill in as the day progresses as another storm moves toward us. Most of the day should be dry, but some mixed precipitation will be arriving by evening. Highs range from 40 to 45 most spots.

Tomorrow Night: Things get interesting as the storm arrives into cold air over the region. We may start with a mix of snow, ice and/or rain before much of the area goes over to plain (at times moderate to heavy) rain overnight. Patchy light-to-moderate icing is possible over the northern and western suburbs, but the main threat should be at higher elevations well north and west of the metro area. Lows near freezing to the mid-30s.

See Dan Stillman's full forecast through the weekend. And if you haven't already, join us on Facebook and follow us on Twitter.

By Ian Livingston  | December 7, 2009; 3:15 PM ET
Categories:  Forecasts  
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Next: Forecast: Mix tonight; heavy rain early tomorrow

Comments

Being in Ashburn, I'm kinda surprised that we're included in the WSW. Judging by the NWS discussion, this seems to be a case of being cautious, with no real belief that any significant icing will occur east of Rt 15. The CWG forecast seems to echo that as well.

Posted by: ThinkSpring | December 7, 2009 3:23 PM | Report abuse

I wouldn't be suprised if the WSW is downgraded to WWA, or even canceled outright. My reasoning behind this is from the updated forecast discussion:

THE DEPTH OF THE COLD BOUNDARY LAYER WILL BE
CRITICAL IN DETERMINING WHAT PRECIPITATION TYPE FALLS. THE BOUNDARY
LAYER WILL CONTINUE TO BECOME MORE SHALLOW...SO EVEN THROUGH
PRECIPITATION WILL LIKELY BEGIN AS A PERIOD OF SLEET OR EVEN
SNOW...IT WILL GRADUALLY BEGIN TO TRANSITION TO RAIN. TEMPERATURES
TOMORROW ARE XPCD TO BE ABOVE FREEZING WITH ONSET OF
PRECIPITATION...SO LITTLE IN THE WAY OF ACCUMULATION IS XPCD BEFORE
SUNSET TUE.

Posted by: Havoc737 | December 7, 2009 7:27 PM | Report abuse

That is, canceled for points east of Route 15.

Posted by: Havoc737 | December 7, 2009 7:28 PM | Report abuse

The ice threat does not strike me as a big one outside of high elevation areas. This airmass is not terribly cold even if it is chilly. Places still with snow on the ground may have an easier time getting at least some freezing rain etc.


The weekend possibility still looks good on models but may be trending too quickly in our favor (hate being in the 'best' spot 5+ days out). It's not yet clear how the players interact, etc. Last weekends threat was only just showing up on Monday of last week so there's at least a few days of bouncing around upcoming.

Posted by: Ian-CapitalWeatherGang | December 7, 2009 7:43 PM | Report abuse

I never get excited about a storm tracking to our northwest, unless Jan/Feb with strong HP to our NE.

I am under a WSW, but believe the NWS is jumping the gun. Better a WWA. Some icing, or light ice acc., but not major. Atlantic too warm.

Weekend, a diff. story. Possibly sig. for ALL.

Posted by: AugustaJim | December 7, 2009 9:11 PM | Report abuse

Folks - In Montgomery County, what is the time line for the potential mess tomorrow afternoon? Will it affect the early parts of rush hour? Hate driving in that junk with young kids...

Posted by: authorofpoetry | December 7, 2009 10:25 PM | Report abuse

The comments to this entry are closed.

 
 
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