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Winter storm warning: Disruptive mix of snow and sleet into tonight (LIVE UPDATES)

** For immediate D.C. area,  winter weather advisory 5 p.m. tonight to 1 a.m. Friday morning | Winter storm warning through 5 a.m. Friday north and west of the immediate metro area | Winter weather advisory 5 p.m. tonight through 1 a.m. Friday morning in southern Maryland **

Snow totals | Zoomable snow total mapStorm news live blog *

The storm’s final wave is arriving.

Key points:

  • Energetic upper level disturbance to sweep through D.C. area between roughly 3 and 11 p.m. tonight
  • Precipitation may begin as a mix, but should change over to snow.  Thunder is possible.
  • Snow may be heavy at times, especially between around 6 and 9 p.m. tonight.
  • Accumulations of 1-4 inches possible, and locally higher amounts cannot be ruled out.
  • This disturbance has a history of producing very heavy snow: 6″ in 3 hours in Roanoke

For more details on this final wave of snow and to comment on what’s happening, go to this post: Storm Snochi may end with a bang

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Goodbye storm Snochi; encore event on the way?

Storm Snochi is almost outta here, save for some lingering snow showers mainly east of town through around midnight. That makes this the last update to this live blog.

So go out and shovel if you  haven’t, but even when you’re done, you may want to keep that shovel handy. Believe it or not, we’ve got a chance of a little more snow Friday night into midday Saturday. See more details in our latest post on the main Capital Weather Gang blog, and remember to watch out for icy spots tomorrow morning.

Dan Stillman
February 13, 11:15 pm
  • Dan Stillman February 13, 11:15 pm

Snow subsiding, to be replaced by more slipping and sliding

This storm is finally fading away for the D.C. area, with snow starting to dwindle as seen in the radar loop below, though still hanging on for a bit in the eastern half of the region.

radar_loop_944

As the snow fizzles, we now turn our attention to temperatures falling to lows in the mid-to-upper 20s, and a Friday that may not see temperatures above freezing until late morning, or even around noontime for some of the colder north and west suburbs.

Hourly temperatures next 24 hours for Washington, D.C. (NWS)

Hourly temperatures next 24 hours for Washington, D.C. (NWS)

So yes, plan for some slipping and sliding if you must head out in the morning.

Dan Stillman
February 13, 9:53 pm
  • Dan Stillman February 13, 9:53 pm

Snow totals now over 20 inches well north and west of the District

With the snow finally showing signs of coming to an end, it’s clear that many spots beat expectations by at least a few inches. The National Weather Service is out with a new list of snow totals. Most are old reports from earlier in the day before the second round. But below I pulled a few that are all from no earlier than 7 p.m. Look at some of these numbers!…

Crofton (Anne Arundel): 10.0″
Westminster (Carroll): 24.0″
Damascus (Montgomery): 21.3″
Alexandria: 8.0″
Gleedsville (Loudoun): 17.0″
Dulles Airport (Loudoun): 13.1″

Generally speaking, it sounds like most spots picked up an additional 1-3″ with this second round of snow, even in the District as seen below…

 

Dan Stillman
February 13, 9:30 pm
  • Dan Stillman February 13, 9:30 pm

Snow: mapped by Twitter

Want to know where it snowed in this storm? Check out this cool map created by Twitter.

(Twitter)

(Twitter)

The map is based off tweets that mention the word snow (no, it didn’t snow in Miami). They also have an interactive where you can zoom way in and watch things progress.

Twitter’s snow map matches up quite well to where actual snow has been reported to the NWS in the past 24 hours, as seen below.

(NOAA)

(NOAA)

Note: In the map above, reports are still coming in. For instance, New England saw snow today but hasn’t been added yet.

Ian Livingston
February 13, 9:01 pm
  • Ian Livingston February 13, 9:01 pm

Recent radar loop shows the beginning of the end

(Weather Underground)

(Weather Underground)

During the last two to three hours, snow bands dropping occasionally moderate to heavy precipitation have been swinging through the immediate D.C. area. Reports from this activity thus far range from as little as a dusting in spots still just above freezing to about 3 inches. Some folks even more than that, mainly to the east and northeast of downtown.

It’s almost over, especially the further west you live. The final edge of snow should push toward D.C. by around 10 p.m. or so, and shift east thereafter.

Watch live radar, let us know how much you have seen this evening, and tell us when it ends at your location over on the main CWG blog.

Ian Livingston
February 13, 8:41 pm
  • Ian Livingston February 13, 8:41 pm

Metrobus suspension through 5 a.m. Friday

Thanks to the new round of snow moving through this evening, WMATA has shut down bus service until early tomorrow morning. Buses will resume at 5 a.m. with limited lines in operation. Important details below.

Metrobus service will remain suspended until 5 a.m. Friday. Starting at 5 a.m., Metro will run limited bus service on major arteries, similar to this afternoon’s service.

The following routes are expected to have limited service, if conditions permit:

District of Columbia: 32, 36, 52, 54, 70, 90, 92, A6/A8, S2, X2

Maryland: 83, A12, C4, C22, D12, F4, J2, K6, P12, Q1, T18, Y9

Virginia: 1A, 2A, 3A, 4A, 7A, 9A, 10B, 16A, 22A/25A, 23A, 28A, 29N

Read the full release

Ian Livingston
February 13, 8:14 pm
  • Ian Livingston February 13, 8:14 pm

Storm center still close, but pulling away

Mesoanalysis of the northeast this evening showing the location of the surface low pressure. (Storm Prediction Center)

Mesoanalysis of the northeast this evening showing the location of the surface low pressure. (Storm Prediction Center)

The heaviest snow bands are beginning to shift east of I-95 overall, but snow is still flying everywhere at this time. In the last hour, our strong low pressure system was located just offshore southern New Jersey.

With a central pressure of ~986mb, the storm is about as strong (if not quite as snowy) as well known ones in the past like Snowmageddon in 2010.

It’s also a beauty on satellite. Note the comma head over the D.C. area:

(NASA)

(NASA)

Generally, as a storm gets north of our latitude the snow threat begins to diminish fairly quickly. We’ll see that occur over the next few hours.

Ian Livingston
February 13, 8:03 pm
  • Ian Livingston February 13, 8:03 pm

Snow piling back up

It’s almost like this was two storms given the extended break in the middle. The second part is putting fresh powder on top of our snow-pack from last night into this morning.

Here’s a quick roundup of what it’s looking like across the area this evening:

Ian Livingston
February 13, 7:36 pm
  • Ian Livingston February 13, 7:36 pm

Thundersnow reported

Vigorous snow bands currently pushing through the region are being enhanced by a powerful mid-level storm swinging by to our south and southeast. It is interacting with the surface low off the coast. The dynamics are helping to create another round of lightning in the area this evening, with some reports of thundersnow.

This activity should remain isolated but is always very interesting to see!

(WeatherBug iPhone App)

(WeatherBug iPhone App)

 

 

Ian Livingston
February 13, 7:14 pm
  • Ian Livingston February 13, 7:14 pm

Snow bands sweeping across area

Radar around 7 p.m. (GR2Analyst)

Radar around 7 p.m. (GR2Analyst)

It’s not quite the overall intensity seen last night, but snow is now falling moderately to heavily in parts of the area as the grand finale of this storm reaches its local peak.

If you’re way west, out near the Blue Ridge and west, the back edge is already approaching. That will continue to push east, but may still take a few hours. Radar trends and short-range models continue to indicate snow should end by the 10-11 p.m. period as shown in the latest HRRR radar simulation at 11 p.m.:

(Weatherbell.com)

(Weatherbell.com)

Even into the city, roads are picking up additional accumulation following today’s melting.

Ian Livingston
February 13, 7:05 pm
  • Ian Livingston February 13, 7:05 pm
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