Snow Timeline & Accumulation Update

Snow will develop between 7 and 10 AM across the D.C. Metropolitan Area.

Snow will continue, possibly mixed with rain through the early to mid afternoon hours. Snow flurries will end from west to east during the evening rush hour.

Accumulations will be found mainly on grassy surfaces with one to three inches possible.

Here is a look at the latest high-resolution, short-range model (4km NAM):

7 AM Tuesday
7 AM Tuesday – Snow developing in western suburbs.
10 AM Tuesday
10 AM Tuesday – Snow
1 PM Tuesday
1 PM Tuesday – Snow
4 PM Tuesday
4 PM Tuesday – Snow & Rain showers tapering off.
7 PM Tuesday
7 PM Tuesday – Lingering Flurries.

Here is a look at the latest Snowfall Accumulation Forecasts from the Various Models:

Latest WRF (Weather Research Forecast) Model
Latest WRF (Weather Research Forecast) Model – One to Two inches in D.C.
Latest GFS (Global Forecast System) Model
Latest GFS (Global Forecast System) Model – 2 to 4″ in DC
Latest NAM (North American Model) Model
Latest NAM (North American Model) Model – One to Two Inches in D.C.

The winds will really pick up on Tuesday night with gusts to 45 mph possible. Wind chills on Wednesday morning will hover in the single digits and teens with actual air temperatures in the lower to middle 20s.

One Reply to “Snow Timeline & Accumulation Update”

  1. I agree completely with your forecast. Pretty good consensus of 1-4″, assuming it sticks. Probably won’t on roads.

    The one way it could be a significant event would be a heavy burst of instability thundersnow, if the air aloft gets cold enough.

    Like

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