TTCM () > WeatherWednesday, March 3, 2021
Washington DC Climate ReportDCwxWeatherSunrise: 6:37; Solar Noon: 12:20; Sunset: 6:03

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Last 72 Hours: ObservationsCurrently: 56°F  — USNO Clear Sky ChartHeavens-Above

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                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
  MAXIMUM         46   3:53 PM  77    1972  51     -5       67
  MINIMUM         31   7:13 AM  13    1886  34     -3       38
  AVERAGE         39                        42     -3       53

  YESTERDAY        0.00          1.65 1994   0.10  -0.10     0.09
  MONTH TO DATE    0.29                      0.19   0.10     0.09
  SINCE MAR 1      0.29                      0.19   0.10     0.09
  SINCE JAN 1      6.88                      5.62   1.26     6.09

Observations Archive

Coastal Flood Advisory

Today: Sunny, with a high near 60°. Southwest wind 5 to 7 mph becoming west in the afternoon.

Tonight: Mostly clear, with a low around 37°. Southwest wind 5 to 8 mph becoming northwest after midnight.

Thursday: Mostly sunny, with a high near 50°. Northwest wind 8 to 16 mph, with gusts as high as 28 mph.

Thursday Night: Mostly clear, with a low around 27°. Northwest wind 11 to 14 mph, with gusts as high as 25 mph.

Friday: Sunny, with a high near 45°. Northwest wind 10 to 14 mph, with gusts as high as 24 mph.

Friday Night: Mostly clear, with a low around 29°.

Saturday: Mostly sunny, with a high near 46°.

Saturday Night: Partly cloudy, with a low around 29°.

Sunday: Sunny, with a high near 47°.

Sunday Night: Mostly clear, with a low around 29°.

Monday: Sunny, with a high near 55°.

Monday Night: Mostly clear, with a low around 36°.

Tuesday: Sunny, with a high near 63°.

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Time and DateTodaySun, MoonClimate, Forecast

ISS Sightings

Launch Calendars: NASA, KSC, 2019, SFN, SFI, RLL, SpaceX

Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
355 AM EST Wed Mar 3 2021

High pressure remains in control through this weekend with a
brief wave of precipitation possible along the Allegheny front
early on Thursday. Mostly Dry conditions expected through early
next week.

Surface high pressure will weaken and shift south toward the
Mid-Atlantic Coast today while a cold front moves through the
Great Lakes.

Radiational cooling has caused chilly conditions early this
morning. However, a westerly downsloping flow is expected to
develop around the high that is building to our south and ahead
of the cold front. The warm advection, downsloping flow, and
sunshine will allow for a noticeably milder afternoon with max
temps well into the 50s and 60s for most areas. Went a few
degrees above guidance for the reasons mentioned above.

The cold front over the Great Lakes will pass through the region
late tonight. Light winds and mild conditions are expected this
evening. However, northwest winds will increase toward morning
behind the cold front. Little moisture will be associated with
the front, so dry conditions will persist for most areas with
just a few clouds. However, a few rain and snow showers are
possible over the Allegheny Highlands. Any snow accumulation
will be light.

The cold front will move off to the southeast Thursday while
high pressure develops and builds toward the area from the Great
Lakes. However, the gradient will strengthen a bit between that
high and low pressure over eastern Canada. The low pressure
system may actually retrograde southwest in response to an
upper-level high over Greenland. In fact, it looks like an
Omega block pattern will set up during this time with an upper-
level low and trough over western Canada and the west coast of
the CONUS and the same over eastern Canada and the east coast of
the CONUS. What this all means for us is that the increased
gradient will cause gusty northwest winds (frequent gusts around
20-35 mph for most areas), and those northwest winds will usher
in chillier conditions as well. The northwest winds and cold
advection may be offset by sunshine and a downsloping flow
Thursday for a bit, so temps may be closer to climo, but colder
conditions with below climo temps are expected Thursday night
through Friday night.

An extended period of quiet weather conditions is expected this
weekend through early next week. Large scale troughing will reside
overhead this weekend, with northwesterly flow in place at low-
levels. This extended period of northwesterly flow will transport
cool, dry continental air into the area. Dry conditions are
expected, along with highs in the 40s and lows in the 20s to near
30. Mid-upper level troughing will shift offshore early next week,
giving way to more zonal flow aloft. In the absence of any strong
disturbances, dry conditions are expected to persist through mid-
week. However, there will be a notable warming trend as west to
southwesterly flow at low-levels transports a much warmer air mass
into the region. Highs are expected to be in the 50s on Monday, and
60s on Tuesday.

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