Friday December 15

This is the third light event that seemed to ramp up right right before reaching us. The trend is for us to get these systems to over achieve and that is the case this time. We have a similar set up to what we had last weekend, but with colder air and ground that means a rough afternoon for traveling.  Temperatures stay below freezing and there will be stickage during the day. A Winter Weather Advisory has been issued for central Maryland and Delaware from 1 PM to 7 PM. Snow covered roads will be an issue getting kids and yourself home today.

I now believe York and Lancaster Counties in PA should be considered for possible road issues as well. While there is no advisory here, treat this the same way as metro Baltimore. Also, southern Maryland will be cold enough for snow to stick on the roads. That includes Lexington Park to Easton, Cambridge… and Salisbury. The Delmarva will have problems lasting longer due to snow falling into the evening hour.

I spoke with Charlie Brinton of McDonogh School and they closed in anticipation of rough roads that their buses and large coverage area can’t cover. This could be a logistic headache for many this afternoon. Please plan ahead. Just a little snow at the wrong time can be a big problem.

 

Stats For December 15

Normal High:  45ºF

Record High:  70ºF in 1971

Normal Low: 28ºF

Record Low: 9ºF in 1962

Snow Record: 5.7″ in 1905

Sunrise: 7:19 AM

Sunset 4:45 PM

*Bay Water Temperature = 45ºF at Thomas Pt. Light House

 

6 AM Temperatures

Satellite: Water Vapor 24 Hour Loop

Notice the push of moisture to the north. This is a similar set up to what we had last weekend.

—> slider: Radar Simulation

Note: This will be developing on top of us. So we can’t track the forward push much before 10 or 11 AM. Then watch it evolved and increase during the afternoon. This is similar to how last Saturday played out… just colder.

  • Metro Washington to Baltimore : Flurries begin 11 AM to 1 PM. Steady snow until 5 PM
  • The northern edge will reach near York PA , but high cut off near Frederick and Hagerstown for the coating.
  • Similar to last Saturday, this will enhance during the mid to late afternoon.
  • Lasting into the evening on Delmarva. Their problems will be after 3 PM through 8 PM.

 

Snow Total Potential:

  • Metro Washington, Annapolis, Baltimore up to York PA = Around 1 inch with some spots up to 2 inches
  • Less west near Frederick
  • Souther Maryland = 1 to 2 inches
  • Eastern Shore/Delmarva = 1 to 3 inches

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Get the award winning Kid Weather App I made with my oldest son and support our love for science, weather, and technology. Our 3 year anniversary of the release and our contribution to STEM education is this November. It has been downloaded in 60 countries, and works in both temperature scales. With your support we can expand on the fun introduction to science and real weather.

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Also See:

My Winter Outlook 2017-2018 for more snow

Maryland Winters

La Nina Formed: What it could mean to our winter

NOAA Winter Outlook: Not The Best But Not The Worst For Snow

Two Farmers Almanacs Winter 2018 Outlooks

Winter Weather Folkore: Suggestions from Animals and Crops

First Frost and Freeze Dates For Maryland (southern PA and northern VA)

My Preliminary Winter Outlook Notes

Low Snow Winters In Baltimore: To Repeat Or Not Repeat

NOAA Ranks Blizzard 2016 4th Worst Snowstorm On Record

Blizzard 2016 Record Top Snowstorm: Area Totals

Extreme Weather of 2015 balanced out on both ends