From the ABC 7 Weather team

Live blog on snow, rain across D.C. area

October 29, 2011 - 06:34 AM
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Winter Storm Warnings and Winter Weather Advisories remain through this evening. Here's the latest on this early winter storm.

Snow on Route 40, near Frederick, on Saturday. (Photo: Mike Conneen/ABC7)


Rain has changed to snow in the D.C. Metro now and will continue to fall over the next few hours before finally coming to an end as the low moves to our north. No accumulations are expected other than on the grassy surfaces. As you travel north and west, more snow is expected to accumulate on top of what has already fallen and that should also come to an end in the next hour or two. I am expecting some pretty impressive snowfall totals for locations such as Hagerstown, MD, northern Loudoun and western Frederick Counties, and the Panhandle of West Virginia.


A Freeze Warning is in effect from Midnight to 9am Sunday for the entire viewing area. Lows tonight will fall into the 20s in the suburbs to lower 30s in town.


Going down the home stretch here... Thank you National Weather Service for the following climate data...

For D.C., snow has only been reported in the month of October 3 times since 1884, with the last occurrance on the 10th in 1979 when 0.3" was recorded. There hasn't been any recorded yet, but we'll see if this changes over in the next hour.

Oddly enough, the same is true for Baltimore, with 0.3" reported on the same day.

For Dulles, there have only been two occurrances of snow in the month of October. There was 1.3" reported on the 10th of October, 1979.


Snow in Washington Co., MD from Mike Conneen


Snow in Berkeley Springs, WV from Mike Fones


Around 3" to 4" of snow reported in Bluemont, VA.

Picture of Bluemont, VA (Loudoun) from Dave Johnson


Light to moderate rain and snow will continue to fall through the next couple of hours. Rain in the immediate D.C. Metro still may change to some wet snow flakes before finally coming to an end after 2pm. No accumulations are expected in and around D.C. The highest snowfall totals have been over the mountains and Potomac Highlands.

Skies will gradually clear as we head through the overnight hours with lows in the upper 20s to lower 30s. It will be a cold start to the marathon tomorrow morning with temperatures right around 30 degrees. Highs tomorrow should reach the upper 40s under mostly sunny skies. Halloween Monday looks to be partly sunny and cool with highs in the low to mid 50s.


Here is a big list of some of the latest snowfall reports from the National Weather Service. Please send any snow reports and pictures to or tweet them to me at @alexliggitt


Snow on Skyline Drive


Below is the balloon sounding from this morning showing the temperature, dewpoint and winds throughout the atmosphere. From 800mb to 100mb, the temperature hugs the 0°C line, which explains the snow earlier this morning, but that little notch around 800mb could be a little warm nose nudging in, explaining some of the reports of sleet mixing in. I noticed the sleet as well farther to the east of Dulles around the same time, which says to me that there is a bit of a warm layer aloft. Now surface temperatures there are drastically different than in D.C. as they are a whopping 5 degrees cooler. That is huge in this scenario as the D.C. metro will have much more melting going on than areas to the west. The back edge continues to rapidly approach the D.C. area from the southwest and you can see it on Doppler. It will be interesting to see if D.C. really has the changeover before the heaviest precipitation ends. At this point I'm not too impressed with it happening. Stay tuned!

12Z Sounding at Dulles Airport


About an inch of wet, heavy snow has been reported in Purcellville, VA from @KPJDCA on twitter. Please keep sending in your pictures and reports to @alexliggitt.

Rainfall totals around the D.C. area have been close to an inch, and I would think another half of an inch will be likely by the early afternoon. We are beginning to see the back edge of this sytem around Charlottesville, VA. It is expected to continue to affect the region through the early afternoon before tapering off later this afternoon probably between 2pm and 4pm. Heaviest snow is still expected to the north and west of town through the higher elevations.


Snow at Oakdale High School in Ijamsville, MD


Snow in Berkeley Springs, WV from Mike Fones


Snow in Frostburg, MD from our WeatherBug Network


Snow on our Frederick, MD WeatherBug Cam


WeatherBug Camera in Damascus, MD


Nice webcam of Massanutten Resort showing some beautiful snow along the Blue Ridge east of Harrisonburg, VA.


For those weather nerds out there, a Heavy Snowfall Discussion just came out from the Storm Prediction Center in Norman, OK. 1 to 2 inch snowfall rates possible mainly along and west of the Blue Ridge.


Snow in Germantown from @MAD_US_WX


Our Latest Snowfall Predictions


Some tweets coming in...

@ADshippin Here in Gainesville VA (within sight of Lake Manassas) we have Heavy Sleet & its coating everything nicely. Temp is 34 degrees.

@markathome99 Huge snowflakes falling here in Leesburg, Va temp 33.6

@andrewk75 Snowing pretty good here in Gaithersburg.

Tweet to me @alexliggitt so I have a good idea of exactly what's going on outside the studio!


Some of the highest area rainfall totals:

Spotsylvania, VA: 0.93"

Centreville, VA: 0.79"

Arlington, VA: 0.76"

Washington, D.C.: 0.72"


A Winter Storm Warning is in effect until 6pm for Frederick, Loudoun, Northern Fauquier and all points west.

A Winter Weather Advisory is in effect until 8pm for Montgomery and Howard in MD and Fairfax, Prince William and Southern Fauquier.

A potent area of low pressure will push up the east coast today bringing with it heavy rain and the potential for some heavy snow as well. The greatest potential for snow will be in higher elevations northwest of D.C., though some snow will be possible even closer in to the Metro. Rain should continue through the late morning hours in the Metro before changing over to wet snow in the early afternoon. Snow should begin earlier to the north and west of D.C.

As far as accumulations, we are thinking 3” to 6” NW of D.C. in the higher elevations. Some areas may see up to 10 inches of snow, especially closer to the ridgetops. Locally, the changeover will only allow for an inch or so of a slushy mess mainly on grass and trees. All precipitation will come to an end in the late afternoon and early evening. Skies will clear tonight but winds will continue to be breezy with lows in the upper 20s to lower 30s. Sunday will feature mostly sunny skies and warmer temperatures in the upper 40s.

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