TTCM () > WeatherMonday, January 17, 2022 — W1 W2 56% W4 W5 40°F
Washington DC Climate ReportDeckSunrise: 7:24; Solar Noon: 12:18; Sunset: 5:13

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Last 72 Hours: ObservationsCurrently: 40°F  — USNO Clear Sky ChartHeavens-Above

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                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
  MAXIMUM         40  11:44 PM  73    1953  44     -4       49
  MINIMUM         17   7:23 AM   2    1893  30    -13       34
  AVERAGE         29                        37     -8       42

  YESTERDAY        0.90          1.00 1909   0.10   0.80     0.00
  MONTH TO DATE    3.23                      1.50   1.73     1.29
  SINCE DEC 1      3.86                      4.91  -1.05     6.25
  SINCE JAN 1      3.23                      1.50   1.73     1.29

Observations Archive

Coastal Flood Warning
Wind Advisory
Short Term Forecast

M.L.King Day: A chance of snow and freezing rain before 9am, then a slight chance of snow between 9am and 10am. Mostly cloudy, with a high near 39°. Breezy, with a south wind 18 to 25 mph becoming west in the afternoon. Winds could gust as high as 49 mph. Chance of precipitation is 30%.

Tonight: Cloudy during the early evening, then gradual clearing, with a low around 27°. Breezy, with a west wind 17 to 24 mph, with gusts as high as 44 mph.

Tuesday: Sunny, with a high near 39°. West wind 9 to 16 mph, with gusts as high as 25 mph.

Tuesday Night: Partly cloudy, with a low around 27°. West wind around 5 mph becoming calm.

Wednesday: Partly sunny, with a high near 47°. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.

Wednesday Night: Rain likely between 8pm and 5am, then rain and snow. Low around 30°. Chance of precipitation is 80%.

Thursday: Rain and snow before 8am. High near 36°. Chance of precipitation is 80%.

Thursday Night: Partly cloudy, with a low around 18°.

Friday: Partly sunny, with a high near 27°.

Friday Night: Partly cloudy, with a low around 16°.

Saturday: Mostly sunny, with a high near 30°.

Saturday Night: Mostly cloudy, with a low around 20°.

Sunday: Partly sunny, with a high near 36°.

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Area Forecast Discussion...UPDATED
National Weather Service Baltimore MD/Washington DC
930 PM EST Sun Jan 16 2022

A rapidly strengthening low pressure will then move
quickly from the Deep South across the Mid-Atlantic into New
England through Monday. High pressure will return Tuesday into
early Wednesday before a cold front crosses the region late
Wednesday into early Thursday. High pressure briefly returns to
finish out the work week before another area of low pressure may
impact the region by Saturday.


Precipitation is lifting through the area this evening with
mid-level dry slot working into VA Piedmont per satellite and
radar imagery. Most of the precip will be shifting north of the
Mason Dixon line by 06Z tonight, except in the wrap around area
and upslope areas. Temperatures will remain above freezing in
the northeast part of the CWA, but remain below freezing in
areas west of I-81. Winds will come down some overnight, but
start picking up again after 09Z as low shifts north as pres
gradient tightens. Expect most winter headlines to be
canceled around midnight except in the Appalachian region.

Main story tomorrow will be blustery winds gusting upwards of
45-50 mph in much of the area, except stronger in the mountains
where near blizzard conditions are possible.

Precipitation should end for most of the region by daybreak on
Monday with the strong surface low starting to pull off to the
northeast Monday morning. Wrap around snow bands along with upslope
snow showers will continue along the Allegheny front through Monday.
Another strong low level jet out the west is expected to form and
impact the region late Monday morning and into Monday afternoon.
Forecast soundings suggest close to 40 to 45 knots will be possible
in the mix layer especially in areas north of I-66. A Wind Advisory
may needed for a good portion of our region with the best winds
likely along the MD/PA border and areas along the Allegheny front.
The continued snow showers along the Allegheny front throughout the
day along with the strong winds may require the Winter Storm Warning
along the Allegheny front to be upgraded to a Blizzard Warning for
Monday. That falls in the third period for me but I will pass along
to our evening shift to make the call on the Blizzard Warning.
Temperatures during the day will be below freezing for areas west of
I-81 and in the 30s to lower 40s further eastward. I believe there
should be little to no threat for refreeze as strong winds will dry
the ground during the day. We may have refreeze concern for Monday
evening and into Tuesday morning when temps are forecast to drop
back down into the 20s.

Wrap around snow bands along with the threat for upslope snow should
begin tapering off Monday evening with only a chance to slight
chance for snow into early Tuesday morning. Dry conditions return
Tuesday with highs in the 30s and 40s.

High pressure will move east to allow for a cold front to cross the
region Wednesday. There could be a few rain/snow showers along the
front, but behind the front the winds will turn out of the northwest
as a reinforcing shot of cold air moves back in. A period of upslope
snow showers is possible briefly behind this front into Thursday
morning. Yet another reinforcing shot of cold air moves in Thursday
as Canadian high pressure builds across the region. Behind this
front, a clipper system moves through the Ohio Valley and into the
Allegheny Front. This could produce light snow accumulations for
portions of the area. Ensemble guidance hints at the potential for
another storm nearby to end the long term, while deterministic
guidance keeps the storm just to the south. Expect fluctuations in
this system given it is Day 7.

Temperatures moderating closer to average ahead of the cold front on
Wednesday. Turning colder to end the week. Given the potential for
several nights of well below freezing temperatures and daytime highs
near or below freezing, ice on rivers is possible.

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