Wednesday December 23 2020

How about a weather gift for everyone this year? That is what 2020 is serving up for us. This arctic front will bring in possible flooding, damaging winds, severe thunderstorms, icing and snow. Sometimes fact is stranger than fiction, and this year continues to prove it.

Winter Weather Folklore: “If in winter there is thunder, snow will fall in one week or under”. Perhaps we get validation on Christmas Day?  The models are now starting to hint at supporting my theory of additional snow showers to be more widespread on Friday.

I’ve written this report differently, but addressing each alert separately. Let’s take a look.

Christmas storm snow ice thunder wind



Weather Advisories
The latest alerts around the region are quite colorful representing this powerful weather system.
A quick summary below and more maps to support each element.


Christmas Flood Watch Winter Storm Wind


Temperature Timeline
The sharp contrast of air masses is the reason for this severe weather.

  • Christmas Eve Night: 60s in central Maryland and Delmarva.
  • Christmas Morning: Freezing Line crosses metro Baltimore before sunrise.
    (Possible Flash Freeze)
  • Christmas Afternoon: Most of the state will be below freezing! 20s and Teens inland.

—-> slider


Flood Watch- Rain Totals
Rainfall Could exceed 2 inches in Central Maryland, Central PA, and Northern Virginia

Flooding may be added along the coastline as well.

Christmas Storm Liquid Total



Wind Advisory – Peak Winds
Wind Gusts from 50 to 65 mph possible near The Chesapeake Bay across Delmarva to the beaches.


Christmas Storm Top Winds


Thunderstorms (Some Severe)
The K-index values over 30 indicate there may be some storms with severe parameters.

Some of the storms Thursday night could contain winds over 60 mph and isolated tornadoes. Any hail or sleet could be confused for each other along the arctic front overnight. This is when the cold air aloft may infiltrate.

See the simulation slider timeline below.


Christmas Eve Severe Weather K Index


“If in winter there is thunder, snow will fall in one week or under”: See more Winter Weather Folklore


Winter Storm Watch/Warning
Potential Snow Total


Christmas Storm Total Snow



  • Heavy snow may reach up to 8 inches in Garrett County MD and this high mountains of West Virginia.
  • Additional snowfall shows up across the map into Baltimore suburbs and even Southern Maryland.

This is the ‘hint’ that supports the Max I have been showing the past few nights.
I still expect snow showers and maybe squalls Christmas afternoon and overnight. This could coat the ground with a dusting to nearly 1 inch in a few lucky spots.


Rain Timeline

Christmas Eve Day

Morning: Showers begin to enter metro areas. Steady rain more likely along the mountains.

December 23 Christmas Eve rain Thursday 8 AM


Early Afternoon: Steady rain into the cities and I-95 corridor.  Heavier cells develop in the mountains.

December 23 Christmas Eve rain Thursday 2 PM



Radar Simulation —> slider

5 PM Thursday to 2 AM Friday

Watch the heavier bands of rain (yellow/orange) slowly move east.  Then the transition to icy mix (pink) and snow (blue) arriving in the mountains by midnight.


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Christmas Day Snow Showers
The Jet Stream Vorticity still supports bursts of snow. This may show up as a scattering of flurries, showers, and heavier squalls.
This may drop a quick coating up to 1 inch in spots.
Where: The energy supports that can be anywhere in our region Friday afternoon, overnight, and lifting north Saturday morning.
December 22 weather Christmas snow vorticity Friday PM 7 Close

Winter Outlook Series

Winter Outlook 2021 Tropical Hints

Winter Outlook Polar Vortex Arctic Oscillation

Winter Outlook Solar Minimum

Early Winter October

Winter Outlook Series Weather Folklore


Winter Outlook 2021 La Nina Advisory

Winter Outlooks Farmers Almanacs



14 Local Maryland Pages (and York PA)

We have made a page for Maryland Weather which gives you the current conditions for 14 present area locations.

Local Hourly Forecasts and Local Radar
Central Maryland



Bel Air

Carroll County/Westminster




Ocean City

Dover DE

Southern Maryland

Patuxent River 

Washington DC





National Weather Service Adds Maryland Cecil And Garrett Counties


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December 5 Snowfall History Start Of Faith in the Flakes

Also see:





Maryland Weather Page

Maryland Weather 

I wanted to keep it simple. Just the basics for a quick view at any time.

Maryland Weather Just In Weather




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