June 17 Morning Fog And Showers Then Flood Watch Plus Increased Severe Storm Risk And Heat Wave On The Way
Tuesday, June 17, 2025 Our weather is about to take a turn. After two days in a row with highs in the 60s, we start with areas of thick fog…
Saturday January 22 2022
Afternoon Update
As we remain fully entrenched in this arctic air mass, the northern branch of the jet stream will active. This means fast moving Clipper systems that race through with snow showers. The moisture is limited, but there can be enough to drop a quick coating to one inch. That I something we can expect in our region on Sunday afternoon and evening.
Saturday Afternoon Set Up
There are two clippers on the map today. The first is moving east through the Great Lakes. That will stay well to our north. But the second one will be diving southward and reach us later on Sunday.
Active Pattern
We can see our Sunday Clipper followed by another Clipper on Tuesday. At first glance it looks like the snow hits a wall in the mountains, and has trouble passing eastward. That is pretty common, especially if the central Low Pressure passes to our north.
Jet Stream Sunday
Closer inspection of the jet stream around 18,000 Ft, we can examine the vorticity or spin. There should be a Vort Max, which can behave like a localized Low Pressure spin aloft, and enhance moisture crossing the mountains.
This will ride a jet streak, a narrow river of faster moving air, passing over central Maryland.
This should be enough to allow the moisture to cross over the mountains into metro Baltimore during the evening.
NEW INFO
Click to See: SUNDAY MORNING REPORT
Radar Simulation Animation
Sunday Noon to Midnight
This model plot shows the moisture first passing north and east of Frederick, with support form higher terrain.
Latter in the evening that Vort Max helps the snow showers expand farther east. They will break up, but could still pass through metro Washington and Baltimore.
Radar Simulation —> slider
3 PM to 11 PM
This model is NOT perfect, and can miss lighter bands of snow.
Afternoon Temperatures
The air is cold enough for stickage. Under the snow it will be in the 20s, the flakes will be fluffy!
That means it does’t take much moisture to produce a quick coating to 1 inch scattered across the region.
TRAVEL
If you have plans to drive through western Maryland or Western PA, the snow will develop in the afternoon. Roads there will be slick.
Timing farther east:
- Along I-81 there maybe issues any time after 3 PM
- Farther East: Frederick to York may have snow Burts any time after 4 or 5 PM
- Metro Baltimore/Washington: Snow showers more prominent between 7 PM and Midnight.
Faith in the Flakes
If need be, I will post a snow map in my next reprot.
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ALSO SEE
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ALL FITF GEAR
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Winter Outlook Series:
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Winter Weather Page – Lots of resources
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Winter Folklore Checklist
