Sunday Afternoon December 15 2019
This report is being written at 2 PM Sunday. A Winter Weather Advisory has been issued for souther PA Monday. This is for 1-3 inches of snow and additional ice. I expect that there will be some more advisories issued by The National Weather Service at any time for the wintry weather on Monday. Here are my quick thoughts and latest modeling.
It does look like snow will cross our region between 3 AM and 6 AM Monday. Temperatures will be below freezing west of the cities with impact on the roads. Metro areas have a 50% chance of roads either remaining wet or covering over… especially on elevated bridges and overpasses.
There will be a transition to sleet and freezing rain. The cold should hold inland and could lead to a modest ice event lasting into Monday night. Here’s how I think it will play out. For the record, I do not make the calls on schools. But based on the expected conditions, there is good reason to pay close attention for potential delays or more if you live in the Blue or Pink shaded zones.
The zones in Blue and Pink are most likely to have some road problems with snow and then icing into Monday night.
See the model comparison and latest simulation timeline below.
HRRR Model 6 AM Snapshot
Road temperatures are the wild card. It is possible within a few miles of the freezing line to have colder temps but warmer and wet roads. It’s also possible to have warmer temps and the snow can fall faster than melting to lead to some stickage.
NAM 3 Km Model
Radar Simulation Timeline—> slider
I will check back in this evening and see if we have any advisories issued by then to expand on.
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WEATHER WIFE COLLECTION
- Thanks to Shannon (weather wife) for hand picking items ‘she’ wants to wear
- The Yoga Pants have side leg pocket for your phone
- The Hoodie is extra soft and has the important ‘thumb holes’
Winter Outlook Series:
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.
Atmospheric Memory Shaped The US East Coast
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