Wednesday January 15 2020

There is a layer of very thick low clouds this morning that has visibility down to near zero in many locations. One thing that often can confuse people is set up this morning. There is a Dense Fog Advisory for central Maryland, but not on The Eastern Shore where many schools are delayed because of the fog. I know the history responsible for the school delays, but do not understand why your NWS Office does not issue advisories as readily.


Morning Weather

After the fog clears, there will be a series of cold fronts that bring back arctic air by Friday morning. Some rain showers are possible but they will be hit or miss. The main event will be Saturday morning with the arrival of snow and a wintry mix. The may catch the end of the Super Plunge Event in Annapolis, and impact other plans during the day in our region.


  • Today: Morning Fog
  • Friday: Colder Air Arrives
  • Saturday: Storm begins with snow and wintry mix
  • Storm Expectations: Morning Snow will impact travel. Change to mix and rain Vs where snow lingers longer in colder zone will determine accumulation.


Wednesday January 15, 2020 in Baltimore

Average High:  41ºF

Record High: 78ºF in 1932

Average  Low: 24ºF

Record Low:  -2ºF in 1964

                      *Record Snow 3.4″ in 1957

Sunrise: 7:24 AM

Sunset 5:07 PM  

*Daylight = 1:24 longer than yesterday 

*Bay Water Temperature = 44ºF at Thomas Pt. Light House 

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Temperature Forecast

Here is the trend through Friday when the arctic air arrives

This Afternoon


Thursday: Temps will be warming in the morning and cooler during the afternoon 







Saturday Snow

I still think there will be adjusting of the arrival of the snow and the duration, so a little too early to say how much. But after a day below freezing, there will be stickage!

Plan for snow to develop in the morning, then a gradual transition to a wintry mix and freezing rain during the afternoon. It is likely the snow hangs on longer in the colder inland suburbs through the day.  That will determine the accumulation.   I will have more details in my next report.

Note: The GFS and Canadian Models bring the snow in a little sooner than the European ECMWF.  These maps are just a snapshot at 10 AM, so compare where the leading edge of the snow is polluted on each.

This is only for a rough gauge and not a precise guarantee. Within 48 hours we can fine tune the timeline with more confidence.

Also See: Set Up For Snow and Cold Pattern


Storm Animation

I like the thinking on the Canadian Model showing the transition to a mix, then with the increased intensity, the colder suburbs will go back to a steady moderate snow later in the day and evening.


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Temperature Outlook




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  • Thanks to Shannon (weather wife) for hand picking items ‘she’ wants to wear
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Winter Outlook Series:

My Call For Snowfall Winter 2019-2020





Snowy Winters Following A Hot and Dry September


NOAA Winter Outlook Leaves Room For More Snow With Mild ‘Seasonal Average’ Temperatures

Other  Links:

See the maps for when we normally expect the first frost in this link.

Baltimore Weather At BWI May Not Be As Hot As Reported

Construction at the airport close to the weather station may be added artificial heat. Click here or the image for the details.



Was Your County Not Included?

Click this map for more on the regional forecast zones


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