Monday February 1 2021

This storm is not done!  It may not seem like it, but so far the numbers show this storm has already behaved within the range expected. That also includes a record daily snow report in Baltimore. More to go today.

Temperatures are colder this morning that suggested by models or NWS local forecasts. That is important as freezing rain has redeveloped in metro areas. Light mist or snow farther inland.

The roads are icy this morning!  There is also a layer of ice on top of untreated snow.

We are in the light icy mix ‘lull’ we expected…


Temperatures at 7 AM

Notice BOTH Baltimore AND Washington are at 30ºF.  Most metro areas never got above freezing.

There is ice and slush around both beltways, in and out of the cities. Even more ice with the 20s inland.

Icy mix falling this morning will turn to snow later this morning.


February 1 weather morning temperatures



Later this morning winds will increase and snow will return.  Then we remain with bands of snow or snow showers through Tuesday.

Before you say BUST, please let me explain what happened already and then what may still be on the way…



What Happened Already

Record Daily Snow Sunday at BWI

NWS reported:

  • Daily Snow = 3.8” Jan 31, 2021
  • The old record was 3.7” on Jan 31, 1985


Checking In: My Forecast for Part 1 (Sunday): Region Average 3“ to 6”

Snow Spotter Reports: 2.5” to 5” Locally

Snow Reports From Sunday January 31 Baltimore Metro


Wider View:

Mountains: 6″ to 10″ 

Southern Maryland:  Dusting To 3 Inches

Snow Reports From Sunday January 31 Maryland


What May Be On The Way

Doppler Radar Snapshot

February 1 weather snow ice Monday 7 AM


Morning Surface Weather

The Coastal Low development I was tracking yesterday and reported last night has developed and is closer to the coast.

This is captured by the Upper Low in Ohio and getting pulled back west. It will bring us:

  • Increased Wind
  • Colder Air
  • Return To Snow Between 10 AM to 2 PM
  • Snow Bands and Showers Through Tuesday
  • Additional Accumulation

February 1 weather morning surface weather



Computer Model Guidance

We are now in low confidence territory with a wide split of storm plots.

The heaviest snow will be to the northeast of our region, but we get in on some of it.


Wind Forecast

Strong Winds from the Coastal will average 15 mph with gusts 25 to 40 mph.

Even stronger on the coast.

February 1 storm WINDS Monday afternoon


European ECMWF Model Storm

February 1 storm snow Monday afternoon ECWMF


GFS Model Storm

February 1 storm snow Monday afternoon GFS



Storm Animation




With ice on the ground early and temperatures already colder than models suggest, I must consider some wiggle room here with a lower hint.


Monday Afternoon

Expected to be below freezing from Baltimore inland from the Bay WEST AND NORTH.

February 1 storm temperatures Monday afternoon


Tuesday Morning

Below Freezing will lead to more icy spots

February 1 storm temperatures Tuesday Morning


Snow Forecast Guidance

Central Maryland:

Additional 1 to 4 inches.  The wide range depends on the banding that sets up. Get under a few and you hit the higher mark.

Bust Potential: If we get into the ‘comma head’ of the snow, these amounts could double.

If you were in my Storm Total of 6” to 12” by Tuesday, there is a good chance that verifies, even if on the lower end.



Northern Maryland and Southern PA:

Additional Accumulation of 4” to 8”+

Bust Potential: If we get into the ‘comma head’ of the snow, these amounts could double.

My Original Forecast of 10” to 18”: There is still a chance to ‘get there’ through Tuesday.



Computer Guidance: Additional Snow

These maps are on the higher end of my forecast numbers below.  You will see how close the really heavy snow will be. So if you want it, a small shift or wobble can make or break the forecast.

European ECMWF ModelSnow Forecast February 1 ECMWF



GFS Model

Snow Forecast February 1 GFS



Adjusted Warnings And Advisories

This evening the National Weather Service cancelled the Winter Storm Warning for metro Baltimore and south. They changed this to a Winter Weather Advisory ending at 10 AM.

I believe this will be EXTENDED!  I has to be based on all the info I have seen and shown you.

Meanwhile the Winter Storm Warning in northern zones remains.

January 31 Winter Storm Warning Change



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Looking Ahead:

I know there is chatter about a repeat storm next Sunday.  Honestly, it doesn’t look so promising from the overnight guidance package.  I would like to get through this one yet before getting into the validity of that.  But here is a look at next Sunday.

February 1 weather storm next weekend


Temperature Outlook

February 1 weather temperature outlook





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