First Pencil Prediction for Wednesday, 12/11

December 10, 2019
MCS Staff
UPDATE: Winter Weather Advisory will be in effect in Northwest MoCo from 2am-8am.‬‪Snow expected. Total snow accumulations 1 to 2 inches are expected, with isolated totals of 3 inches possible for elevations above 1000 feet.‬

From the National Weather Service
“There is a potential for hazardous commuting conditions for the Wednesday morning commute. A period of accumulating snow is
POSSIBLE Wednesday morning across the Baltimore MD/Washington DC metro areas, with up to an inch of snow accumulation possible on area roads, with the highest chances north and west of Interstate 95.”
As you can see in the maps from the National Weather Service, Capital Weather Gang, NBC4, WUSA9, Fox5, and ABC7, we are not expecting a lot of snow…as most naps have us between a coating to 2 inches.
This one will be more about when it falls rather than how much. Temperatures almost reached 60° today (I was reminded a few dozen times), but anyone that has experienced weather in our area should know that a 25-30° swing in 18 hours is pretty easy for us.
Temperatures may not reach the freezing mark at all, but they’ll get close overnight. Rain will changeover to snow between midnight and 4am for us and last a few hours, clearing up by late morning.
If enough snow falls overnight, it could make for a slushy morning commute which could easily lead to a delay. If we see the lower side of projections, I would expect wet roads in the AM.
I’d expect the usual suspects to get the higher end while spots closer to the beltway get less.
This won’t be an easy one, but our first call is 2 pencils!
If an update is needed, it’ll come later tonight.


  1. Al on December 10, 2019 at 8:46 pm

    Come on Moco snow I know there’s at least a 2 pencil chance.

    • Alex Tsironis on December 10, 2019 at 9:34 pm

      That’s what the prediction says…

      • Ben H. on December 11, 2019 at 12:28 am

        It should be more pencils.

      • joe on December 11, 2019 at 1:44 am

        they probably looked at the last image with the prediction chart and thought that it was a 1 pencil prediction, since 1 pencil’s desc is in yellow

      • Chip on December 11, 2019 at 2:47 am

        Gotta read the entire post above . . . it says 2 pencils. Gotta READ!

  2. Fellow MCPS educator on December 10, 2019 at 10:04 pm

    Puh-lease Male an android app for your fellow teachers who don’t have iPhone money. You can designate it as your professional development credits 😛

    • Alex Tsironis on December 10, 2019 at 10:22 pm

      Android app coming soon!

  3. Zedwin Jayeng on December 11, 2019 at 12:03 am

    A three and i will be happy. a three and this is boutta be FREE!!

  4. Helen H. on December 11, 2019 at 12:27 am

    I Just tried to walk to my car that is parked on the other side of the road and slipped on ice. I live in Bethesda MD. I do not think it is smart for school to take place tomorrow.

  5. Edward on December 11, 2019 at 1:01 am

    Can’t let this happen…

  6. Sam on December 11, 2019 at 1:09 am

    Can you make a new updated post

    • A MCPS student who loves closures on December 11, 2019 at 3:09 am

      I’m so conflicted. The slush/snow and timing makes me think a delay but then again can that really effect roads. I really don’t know. My opinion is a 50/50 shot.

      I really hope this is not one of those scenarios when everyone thinks mcps should have delayed but they don’t. PLZ DELAY MCPS

  7. MCPS Student on December 11, 2019 at 1:20 am

    I heard that for this system/small storm, the slush will be more of an issue than snow accumulations and that the slush will help more than the snow accumulations in determining whether we will or we won’t have a 2-hour delay. Do you think this is true?

  8. Sarah on December 11, 2019 at 2:41 am

    Will there be another update tonight?

  9. Mcps student on December 11, 2019 at 2:47 am

    I live in the Damascus area and the roads are already very icy. The temps aren’t even at the lowest expected yet.

  10. Ben A. on December 11, 2019 at 4:14 am

    Prince William has called a 2hr delay, how much do u think this will influence moco’s decision

  11. A MCPS student who loves Closures on December 12, 2019 at 10:29 pm

    Is there any possible chance of a delay tomorrow?

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