Conditions: Baltimore, Maryland, 12/01/2023 01:50:03 pm


Mostly Cloudy


Dew Point
Relative Humidity


Feels Like


Wind (N)


Air Pressure


Sun Rise

07:06 AM

Sun Set

04:44 PM

Day Length

09:38 Hours


1 min 14 sec loss

Moon Rise

08:34 PM

Moon Set

11:09 AM

Next: Last Quarter

Dec 05,2023

Moon Phase

Waning Gibbous

Average Low



Average High
Record Low




Record High

This Polar Vortex Event Is Not Groundhog Day All Over Again

La Nina
Polar Vortex
climate data
atmospheric memory

February 2, 2023

Thursday Evening Update

The reality of this Polar Vortex event will be felt as soon as Friday and Saturday morning. True arctic winds will be surging in both snow showers and the frigid winter air we have been missing. Does this sound familiar? We experienced something like this just before Christmas weekend. That was followed by very warm air through New Year’s day and the outlook for next week looks similar. It is something we could perhaps file under Atmospheric Memory. But this is not exactly same and I believe the rest of this month will not be a repeat of January. I’ll explain below.


Recap: Polar Vortex Before Christmas

December 20 bomb cyclone jet stream Chistmas Eve


Current: Polar Vortex This Friday

Below is the animation of the forecast through next weekend.

February 2 Groundhog Day Polar Vortex


I am writing this on Groundhog Day and we have the support from Phil that winter will last 6 more weeks.  OK, his accuracy is under 50%, but it is something for the hopefuls.  However, there are other things to give hope.

In all of my recent reports, I have shown the latest first measurable snow dates in Baltimore. We broke that this week (barely with 0.2”) to lock in 3rd place.   The 2nd place year is very interesting.

Latest Measurable Snow In Baltimore

This Year Was 3rd Latest

  1. Feb 21 in 1973 (50 years ago)
  2. Feb 6 in 1914 (109 years ago)
  3. FEB 1 in 2023
  4. Jan 25 in 1992 ( 31 years ago)
  5. Jan 25 in 1901 ( 122 years ago)

The 2nd place year was 1914 (109 years ago): More About That Winter

Mid Winter Record Warmth

72ºF on January 30, 1914 – Record High

Imagine what those people thought that winter?

Well, they broke their snow drought on February 6th, 1914, then made up for lost time!

11.4” Snow fell in February

11.6” Snow fell in March. 

That season ended with 23 inches, which was above an average winter.


It has happened before, and can happen again.

Why hang on to that? Well, it was another extreme year for late start to a winter season, and still contained a few robust snow events.

This winter was our THIRD La Niña in a row. 


Back in December I wrote this report that the waters in the Pacific Ocean were expected to end that event and return to neutral. In the Title I wrote “Increasing Late Season Snow Odds”.  We are now about to enter the late season.

Last week I wrote this report update, which included this Polar Vortex event, and a follow up on La Niña showing signs of ending.

February is also prime time for snow.  Historically, the most snow occurs in this month. Most of our top 10 snowstorms are close to Presidents Week.  So while we see a warm up next week, it does not promise the rest of the month will follow.


Average Snowfall In Baltimore


Let’s Get To This Current Weather

Thursday Evening Surface Weather

The cold front on the move tonight will usher in the strong winds and true arctic air. The net result means high temperatures for us will be close to midnight.

By morning we may get a band of snow showers, followed by temps staying steady or falling… with additional flurries.

February 2 weather Thursday evening Groundhog Day


Friday Forecast

Radar Simulation

Friday Midnight to Noon

Tracking that snow band from the Great Lakes through central Maryland by daybreak.  Additional snow showers or flurries are possible during the day.

February 2 snow radar Friday


Wind Animation

Strong winds from the northwest will be steady at 10 to 20 mph with gusts over 30 mph at times.

February 2 wind forecast Friday



Friday Morning

February 2 weather temperatures Friday morning

Friday Afternoon

Nearly steady or falling from the morning.

February 2 weather temperatures Friday afternoon


Wind Chill

This will hurt as one of the coldest days all winter. It may be comparable to the Christmas Eve frigid feel.

February 2 weather temperatures Friday afternoon wind chill



Saturday Morning

The big story may be the Polar Bear Plunge in Annapolis on the Chesapeake Bay. It will be dangerously cold without being wet.


February 2 weather temperatures Saturday morning wind chill


Wind Chill

This outlook has our region in the single digits. But stronger wind gusts may take us below zero!

February 2 weather temperatures Saturday morning wind chill

Northeast View


Yes, actual readings could drop to the -20s and -30s across the mountains of northern New York and New England.

February 2 weather temperatures Saturday morning northeast


Wind Chill

This may be some of the coldest recorded temperatures for some areas of New England. Metro Boston may have wind chills in the -30s, while the mountains of New Hampshire and Maine could end up colder than shown here. Some peaks like Mount Washington could end up with observations to -80ºF.

February 2 weather temperatures Saturday morning northeast wind chill


Jet Stream

Animation Thursday Night Feb 2 to Saturday Night February 11

The polar vortex will retreat quickly as a strong ridge will build in quickly. It is my humble opinion that the forecast temperatures are not high enough.

The next push of cold air will arrive next weekend.  There is more winter fighting back.

February 2 weather jet stream polar vortex forecast



Thursday February 9

That ridge in the East will push us into the 60s, or warmer!

February 2 jet stream warm next week

Saturday February 11

NEXT WEEKEND that warming should come to an end. Much like the warmth, I am not sure the modeling is handling this well. Considering the miss I suggested earlier this week (and we ended up verifying that little snow) it’s best to keep an open mind about this as well.

February 2 jet stream cold next weekend


Temperature Outlook

I am using the GFS Model – Deterministic

I cut this off at next weekend considering the low confidence farther out in time.

Note: The number for Friday is a high at midnight.

We may end up colder this Saturday and Warmer next Thursday and Friday. Upper 60s to 70ºF is possible.

February 2 weather temperature outlook


Final Thoughts

There is a similarity to what we had around Christmas and New Year’s Day, but there is more at play.

All I can suggest is once again keep an open mind.  Winter is not done and any outlook beyond 7 to 10 days has very low confidence and accuracy. The best we can do for now is spot the trends along the way.

Faith in the Flakes



Also See:

Winter History: Low Snow And Late Starts

See my research based on Baltimore data since 1883.



NOAA Outlook: Colder Start To February

Click here for the full report

NOAA Temperature Outlook February Cold

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Also See The Winter Outlook Series:

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Normals And Records: Maryland and Baltimore Climate History


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