Network News

X My Profile
View More Activity
The new Washington
Post Weather website
Jump to CWG's
Latest Full Forecast
Outside now? Radar, temps
and more: Weather Wall
Follow us on Twitter (@capitalweather) and become a fan on Facebook
Posted at 3:30 PM ET, 01/17/2010

Steady rain departs; damp drizzle & mist linger

By Dan Stillman

* CWG turns 2! Comment with your feedback *
* Outside now? Radar, temps & more: Weather Wall *

Radar: Latest D.C. area radar loop shows movement of precipitation over past two hours. Powered by HAMweather. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

The steady rain has moved off to our north, not before rendering the bulk of the day a washout with most locations receiving from .50"-75" of rain. We'll remain with a generally damp feeling outside into the night, but better weather awaits us for MLK Day.

Through Tonight: Mist and drizzle linger, along with the chance of a passing shower or two early. Overcast skies through the night will keep temperatures from dropping too far -- late-afternoon/early-evening temps in the low 40s edge back to the upper 30s for overnight lows.

See Brian Jackson's full forecast into the work week.

By Dan Stillman  | January 17, 2010; 3:30 PM ET
Categories:  Forecasts, Updates  
Save & Share:  Send E-mail   Facebook   Twitter   Digg   Yahoo Buzz   StumbleUpon   Technorati   Google Buzz   Previous: Forecast: Dreary & depressing with downpours
Next: Forecast: Mild start to week then a wintry tease


wow, the NWS "at a glance" forcast for thursday went from 39 low & 51 high w/snow to 37 low & 43 high w/snow.

first of all, why/how the snow prediction with such high temps?

and second, what changed? the predicted high dropped 8 degrees?!

Posted by: walter-in-fallschurch | January 17, 2010 4:53 PM | Report abuse

One thing that seemed to help keep the temperatures up a little with this storm (we probably would have done 7-8" of snow here if it were down around freezing), besides the obvious influence of the mild air mass the last few days, was the apparantly inland track of the storm instead of staying offshore. The low center appears to be moving through AL, TN, and southwestern VA towards our region instead of the more usual track offshore. That, of course, kept us in a more mild flow, and kept the coldest air to the north and west, but it may will allow the warm-sector thunderstorms to track up the coast, S and E of us.

Posted by: MMCarhelp | January 17, 2010 4:53 PM | Report abuse

Walter, many factors go into a rain/snow forecast...not just surface temps. Evaporative cooling, for one, can play a big role if the air is dry at the surface and precipitation aloft starts falling through it....that can drop surface temps (and add moisture) in a hurry. I've also seen it 40-42 degrees at the surface and snowing...usually, in that case, from snow squalls/show showers. That sometimes happens when it is unstable, with cumulus clouds, and a sharp lapse rate. That is why the 850 mb and 700 mb conditions are so important.

Posted by: MMCarhelp | January 17, 2010 5:02 PM | Report abuse

The NWS forecast has a chance of snow in it for Wednesday night and Thursday night, which probably explains the snow icon for Thursday.

Posted by: Curmudgeon4 | January 17, 2010 6:00 PM | Report abuse

Annoying mist still prevelent. Not heavy enough to warrant an umbrella, but annoying enough to quicken your pace walking through it.

Posted by: Brian-CapitalWeatherGang | January 17, 2010 6:13 PM | Report abuse

Looks like my earlier hunch was right about the low's tracking, and what it would bring up S and E of here. There's some rather impressive echoes going up the Eastern Shore. Salisbury is reporting a thunderstorm, with 48 degrees at the surface.....apparantly, it's pretty warm and unstable aloft. Looks like the low center is going right over them.

Posted by: MMCarhelp | January 17, 2010 8:06 PM | Report abuse

so, is there really a 30% chance of snow on thursday? maybe snow that melts when it lands?

Posted by: walter-in-fallschurch | January 17, 2010 10:44 PM | Report abuse

We lost power for a couple hours this morning for some reason...

This evening, we were flirting with freezing temps in the Blue Ridge Mtns for awhile with a low of 32.5F, but now I'm reading 33.3.

Enjoyed watching the season premier of 24...

Posted by: spgass1 | January 17, 2010 11:18 PM | Report abuse

It does look like we'll have to track the chance of mixed precipitation for the Thursday-Friday perod. More details coming tomorrow! Have a great night and hope everyone who's lucky enough to have a day off tomorrow enjoys it.

Posted by: Dan-CapitalWeatherGang | January 17, 2010 11:35 PM | Report abuse

The comments to this entry are closed.

RSS Feed
Subscribe to The Post

© 2012 The Washington Post Company