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Posted at 3:15 PM ET, 12/19/2008

PM Update: Patchy Fog as Storm Begins Exit

By Ian Livingston

Cloudy, chilly Saturday; What about the next storm?

* Flurry of Fed Science News | Redskins-Eagles Forecast *

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

If it seems it has been cloudy and rainy a lot this month that is because it has been. In fact, almost every work day the last two weeks has featured some precipitation, and today has been no exception. Earlier showers left some drizzle and patchy dense fog behind. Scattered showers remain possible through the commute home, which together with winds from a cold front should help the fog dissipate. Highs that generally reached the low-to-mid 40s will slowly fall this evening. Use extra caution on the roads as they will be wet and sometimes obscured by fog.

Tonight: After some showers continue into the early evening, we start to dry out but stay mostly cloudy overnight. Temperatures should fall to the mid and upper 30s. Winds will be light around 10 mph from the north.

Tomorrow: Saturday is shaping up chilly and mostly cloudy. Much of the day will be dry as the next storm system gathers strength and approaches. Highs should only reach the upper 30s -- below average for the date. By late evening the first rain or snow showers may arrive from the next storm, but most activity should hold off till after midnight.

Next Storm: The storm system arriving late Saturday night and lasting through approximately midday Sunday still has the potential to give the region a small taste of wintry weather. With recent computer model guidance trending slightly colder, it's possible we'll see some mixed precipitation overnight Saturday into early Sunday morning with temperatures right around the freezing mark. The greatest risk for more significant accumulation of snow or ice will be near and north of the Maryland-Pennsylvania border. Stay tuned for updates as needed.

See Camden Walker's forecast through the beginning of next week.

By Ian Livingston  | December 19, 2008; 3:15 PM ET
Categories:  Forecasts  
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Next: Forecast: Clouds, a Quick Mix, then Cold


Hi I posted this early this afternoon on an earlier entry, but wanted to repost here, re: the models tending colder. thanks.

The long-range models are really tanking with the temps. Still not reflected on the official forecasts. Wondering also if anyone else is suspicious that this time (finally) we may get more snow than predicted and not less. I could see this being a "surprise snow," there's alot of volatility and the models are not consistent, except now trending colder.

And also, I am trying this site again, Lord help me...I promise not to get riled up by (or even read) any the politics that has infiltrated the site since back in the early days.

I do love talking about weather, however!

regards to you all!

Curt McCormick
Darnestown MD

Posted by: curtmccormick | December 19, 2008 2:32 PM

Posted by: curtmccormick | December 19, 2008 4:19 PM | Report abuse

I agree about the politicial posts infilrating this site have taken away from it's original purpose, forecasting the weather. Their r plenty of sites around 2 argue over whether Global Warming exists or not, & people arguing about it on this site takes away from discussions about up coming weather events. Besides, no one is going 2 change their views based on pro or con debates on this site. Hope we spend more talking about the present & future weather 4casts. Could b why some of the long time posters have seemed 2 have disappeared.

Posted by: VaTechBob | December 19, 2008 4:43 PM | Report abuse

Posted by: curtmccormick | December 19, 2008 5:08 PM | Report abuse

Posted by: curtmccormick | December 19, 2008 5:09 PM | Report abuse


Not much to disagree with in that discussion. Consistent with our thinking.

Posted by: Jason-CapitalWeatherGang | December 19, 2008 6:09 PM | Report abuse

Which part Jason? The NWS discussion, the models-are-tending-colder-discussion, or the let's-keep-politics-out-of-a-weather-blog-discussion? :)

thanks again and kind regards

PS I mean bigger cold than you suggest. Can't wait to see the next round of models!

Posted by: curtmccormick | December 19, 2008 8:20 PM | Report abuse

Unless the lows pass S & E of us, it won't matter what the surface temps r, 32 or less will bring ice & sleet. Temps aloft will determine the type of precp. & when lows stay W & N of area the temps aloft r 2 mild 2 support snow. Of course, even if lows track S & E we still need temps close to 32 for snow. Who knows, maybe things will fall in place 4 a white surpise.

Posted by: VaTechBob | December 19, 2008 9:11 PM | Report abuse

00z NAM has less CAD for our area. Honestly this isnt even a minor event for us IMO. Expect rain, A COLD RAIN AT THAT!

Posted by: clintonportis17 | December 19, 2008 9:17 PM | Report abuse


Most of the time you're right that the sfc low moving to our n&w won't mean snow, but not always the case. If you have strong cold air damming and overruning, sometimes you get a thump of snow before a changeover. That probably won't be the case in this scenario.

@Curt McCormick

I was agreeing with the NWS discussion. Climate change and weather are too closely linked to ignore it. Maybe one post a week here is about climate change out of 20-30 posts. And our climate change discussions focus on the science and impacts--not the politics. Having said that, some commenters make political commentary in response to the climate posts, but that's their choice, not ours.

Posted by: Jason-CapitalWeatherGang | December 19, 2008 10:42 PM | Report abuse

Jason: as you always say, however, meteorology and climatology are two entirely different subjects.
With that in mind, why not dedicate this site--and the great forecasters who run it--to weather, and start up a sister site that deals with questions of climate? That would create a legitimate forum for question of global warming and long-term change.

(I would suggest as a domain, but that's already been taken.)

Posted by: KBurchfiel | December 20, 2008 12:08 AM | Report abuse

"site that deals with questions of climate":


Posted by: CapitalClmate | December 20, 2008 12:18 AM | Report abuse

NBC25 (Hagerstown) mentions the possibility of several inches of snow:

"Sunday: A fast-moving storm system passes through bringing snow, mixing with sleet and freezing rain starting early in the morning and lasting through midday. Several inches of accumulation may be possible with highs around the freezing mark."

Posted by: spgass1 | December 20, 2008 1:17 AM | Report abuse

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