Monday January 6 2020
The little snow event on the way will arrive Tuesday afternoon and depart Tuesday evening. While the bulk of the snow will fall while temperatures are above freezing, there may be a burst in the afternoon that can overtake the warmer ground. The National Weather Service has expanded the Winter Weather Advisory for Tuesday January 7 to include central Maryland west of the Bay, but north of the reporting station at BWI. Anne Arundel County is not included.
See my original forecast from earlier today below to compare:
NWS Winter Weather Advisory:
- Included in Maryland are Harford, Cecil, Baltimore, Carroll, Howard, Frederick, Montgomery, and Washington Counties in Maryland.
- NWS Forecast: 1 to 3 inches of snow, noon to 7 PM.
- Heaviest between 3 PM and 6 PM
NWS Forecast Map
First Call For Snowfall
Zones Explained and model timelines below.
My totals account for melting and what may stick on the grass. I do not put much value in the computer model guidance snow totals for many reasons. So if you have seen higher amounts, consider the melting factor from warm ground AND the chance the model is over playing the event.
Blue: All snow zone. There will be a range from just a coating to up to 2 inches. There will be burst of snow, that are more likely in the mountains and parts of Frederick and Carroll Counties. Farther east and north the snow will likely be lighter. Most of this total will be on the grass. Watch for road issues possible after 3 or 4 PM.
Pink: Wet Snow or Mix if rain and snow. This includes most metro areas. Best chance for a coating up to 1 inch on the grass and car tops… More likely as the sun gets lower after 4 PM. This region is also in the risk of some icing as temps drop below freezing at night. Any ice will depend on chemical treatment AND if the pavement is wet as temps drop overnight.
Yell0w: Mostly rain, but the system should mix or end with snow. The ground should remain wet.
- Snow Timing: 1 PM to 7 PM across the region
- Temperatures: Most metro areas stay above freezing, but after dark wet pavement can ice up
- Temperatures: Typical colder suburbs will get some stickage and some pavement icing after dark for what is still wet.
- Bay Areas: Rain will end as snow, but this is not your winter event.
NAM 3 Km Model–> slider
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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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