Saturday November 28 2020

I was all set to start applying the new winter pattern and snow to real events next week, plus the chance for flakes to reach central Maryland. We will have two storms to decipher.  But I do need to add some context first. Then the new models maps below.

The Baltimore Ravens have one of the largest outbreaks of COVID-19 in professional sports.  Their Thanksgiving Night game with the Steelers was postponed due a growing list of Ravens players that tested positive. The game was pushed to Sunday, and then again to Tuesday night. That is when the new winter pattern will kick in. With the game in Pittsburgh, there will be snow! (see the maps below).

That game may be in jeopardy. The Ravens have 18 players on the COVID-19 reserve list, including Quarterback and last year’s MVP Lamar Jackson. The Steelers just added starting back James Conner to their list of 4.  This is a serious concern for all involved, and should not be dismissed. My focus on this site however is about the weather.

As of this time (Saturday night), there has not been another postponement. So, if the game is on, there should be snow.


Let’s take a look at the first of two storms.

This is the one building in the Gulf and will reach us on Monday with moderate to heavy rain.  The cold air will follow on Tuesday.

Storm 1 Animation

See the key time frame snapshots below.

November 28 weather rain snow storm Monday



Key Time Frames

Tuesday Morning

I’ve shown the larger view to highlight the large impact of the cold air. That blue line represents where the expected freezing line at cloud level will reach.

While central Maryland has green (rain) at the end of the storm, the cold air aloft could mix in snowflakes the model is not determining yet.

Blue shading shows moderate to heavy snow showers across the Great Lakes into the mountains of western Pennsylvania, Maryland and WV.

November 28 weather storm snow rain Tuesday 10 AM


Tuesday Afternoon Jet Stream

This is the ‘vorticity’ or spin around 18,000 Ft aloft. This is a signal of the energy with the storm.  Here I’ve highlighted the Vort Max with an ‘X’. That suggests a push of energy over the mountains that can support snow showers into parts of central Maryland.  The larger flow keeps the snow streamers from the Great Lakes.

November 28 weather storm Tuesday Jet Stream


Tuesday Night

  • This would be close to the game time, and Pittsburgh is still in the influence of Lake Effect Snow showers.
  • If the COVID-19 situation was not a factor, I would suggest this could be a fun distraction to watch while the Ravens fading season is on the line.
  • Yes, this time frame could also carry flurries or snow showers into parts of metro Baltimore.

November 28 weather storm snow rain Tuesday 7 PM



Storm 2 Animation

Let’s skip ahead to next weekend, even though there could be some other disturbances with snow showers during the week.

Here is Saturday and Sunday with a storm set up that looks very similar to the first event.  The difference this time is that the core of cold air dives south, after the initial cold surge has been established. I am not sure the models are still able to handle this well, but this is the best we have for now…

See the key time frame snapshots below.

November 30 weather rain snow December 5 weekend



Saturday Afternoon

This will be a complex event. Low Pressure appears to be along the NC coast. This will move east into the Atlantic, but the upper level pattern will appear to pull the main energy back inland. A primary Low should take over in Pennsylvania.

The Cold Core of the upper level Low will be over western Tennessee and moving east to catch up to the storm.

For us: Heavy Rain.

November 28 weather storm snow rain Saturday 4 PM


Sunday (early) Morning

The overnight/ pre-dawn set up shows the Cold Core pulling south of the main storm. It could be colder in Charlotte, NC than Baltimore at this time.  But, the upper level cold air will be forcing rain to switch to snow in the mountains.

This will need to be fine tuned as we get closer, but the mix could reach central Maryland.

November 28 weather storm snow rain Sunday 4 AM


Sunday (late) Morning

After daybreak, the cold core reaches our region. While the GFS shows rain for us, the temperatures at cloud level disagree.  I do suspect this will evolve and be adjusted as we get closer. But, IF this was the set-up that verifies, I would suggest may in metro Baltimore would see a mix with or change to snow at the end of the storm.

November 28 weather storm snow rain Sunday 10 AM



Outlook: There Is MORE In The Pipeline

The pattern really looks good for cold air, and continues to show reinforcements.  It would be hard to not see snow before Christmas for much of our region with this.

Here is the Jet Stream for December 10. This shows a trough dominating the eastern US.  That in December is very conducive to cold air and snow.  Got Faith in the Flakes?  Stand by.



November 10 weather cold winter jet stream December 10




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Also See:
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My Final Winter Outlook: Snow Forecast

My Winter 2021 Outlook




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