Saturday February 6 2021

The storm looks impressive on the weather map as multiple pieces of energy are coming together. This will be a race of the cold air trying to move in from PA and the battle of the developing system from the south. There will be more snow that falls on the grass than on pavement to shovel.

Here is a look at the evening set up ahead of the storm.  While colder air is moving in to the north end, there will be a delay across southern areas until the precipitation arrives in the morning.


February 6 weather Saturday evening storm



Water Vapor Satellite Loop

Here we can see three clusters of moisture moving in our direction. This is part of the complex ‘phasing’ for the storm to develop.




Evening Temperatures 

Temps inland are already near freezing. But a jump to the upper 30s and lower 40s from Baltimore to Washington/ south and east…

February 6 weather temperatures evening


I want to make a few points clear: 

  • This will mostly a Sunday ‘morning’ event.
  • This may start and end with some rain.
  • Heavier precipitation will drag down colder air and turn any mix over to snow.
  • The heaviest snow will likely be between 6 AM and 10 AM.
  • I went lower than model guidance on purpose: To account for melting.
  • My final call map is below: I shaved a little back.
  • The NWS maps match what prompted their ‘Watches’ yesterday and ‘Warnings’/’Advisories’ today.


Bust Potential Based On Temperatures:

At least half of our region will remain above freezing in the morning. That is my main hesitation about how much moisture can fall and stick. I have shaved just a little off the north and south end. 

February 7 weather morning temperatures




Storm Animation

Quick hit!  Arrival before sunrise and most will be done by noon or early afternoon. 

February 7 snow NAM model



  • This set up can drop heavy snow rates of 1 to 2 inches per hour at times.
  • Inland temperatures will be below freezing. Roads there will be slick later into the morning, but they get less moisture.
  • Metro and Bay areas get heavier snow/mix, but with temps between 33ºF and 35ºF.
  • The snow that falls in the dark has a better chance to stick.
  • More will stick on snow already in place and grass.   
  • On the pavement? That is the wild card! Some roads stay wet, others can get covered for a few hours.
  • After higher sun angle (8 or 9 AM) its more likely to melt.

Winter Storm Warning and Winter Weather Advisory


February 7 winter storm warning advisory


NWS Forecast

  • Maryland ‘Warning’ Zone in : 3 to 6 inches
  • Southern Pennsylvania ‘Advisory’: 3 to 5 inches.  *They have different criteria
  • Maryland ‘Advisory’ zone: 1 to 3 inches


NWS Regional Snow Forecast Maps —> slider


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My Final Call For Snowfall

I don’t often change at the last update, but this time I did. 

  • This is lower than my first call AND lower than NWS.
  • My main adjustment lowered snow in two spots: North/West for less moisture. South and Delmarva to account for a little more melting. 
  • Central Areas: My range of  3 to 5 inches allows for variables of melting and some local bursts of heavier snow. I dropped the high end from 6″. If anyone gets there, I’d rather it be a pleasant surprise than lead you to think too high.

February 7 snow total final Sunday


Sunday Afternoon:

Storm ends and temps allow for melting

February 6 weather temperature Sunday PM 5



Sunday Evening:

Back below freezing again. Whatever is wet, will have a chance to refreeze.

February 6 weather temperature Sunday PM 8



Monday Morning: Deep Freeze


February 6 weather temperature Monday AM 7



Getting Even Colder Over The Next Two Weeks


February 6 weather temperature outloook central Maryland





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