Pages

Monday, March 18, 2024

Very wintry week with snowfall expected almost every day through Thursday

Winter-like temps and snow showers have returned to the northern Vermont country and I am expecting a very interesting next 3-4 days of weather. It begins rather immediately as a deep layer of instability, not atypical of early Spring, but impressive regardless, establishes itself over the state. The vertical cross section of the lowest 9,000 feet of the Mad River Glen atmosphere is rather magnificent looking  and is inidcating the potential for very heavy snow showers Monday evening and night. We are lacking just a tad on the flow. Mad River Glen snow squall fans such as myself prefer a northwest flow off Lake Champlain the prevailing west to northwest flow favors Smuggs and Stowe, but I expect this deep layer of instablity to work some magic anyway. Intermittent heavy snow Monday evening and night will bring 3-6 inches to the mountains, 1-3 inches to valley areas and potentially more than 6 to the mountains north of Waterbury.

The ski day on Tuesday appears drier and chilly with temperatures hovering in the 20's on the mountain. An approaching clipper system will help stabilize the lower troposphere and also help lower wind speeds from what was a blustery Monday. Snow from this aforementioned clipper will arrive Tuesday evening and fall sporadically and not too heavily through Wednesday morning. We are not on the right side of this clipper system and this will keep snow accumulations in the 1-3 inch range Tuesday night and during the ski day on Wednesday. Once we turn the flow northwesterly later Wednesday, heavier snow showers are again likely and should persist into early Thursday. The depth of the instability doesn't appear quite as impressive as Monday night but the flow is better aligned for MRG and snow totals are certainly capable of exceeding an additional 4 inches (on top of what falls Tuesday night and Wednesday). The incoming airmass late on Wednesday is also quite cold for late March and will bring temperatures into the 15-25 degree range for most of Thursday. It will be dry by Friday morning with more sunshine and with temperatures as low as 5 degrees in few spots. 

Where have you been arctic pattern ? It's here for this week with cold air in place for the upcoming weekend as southern stream moisture tries to converge with a polar impulse. Models are still at odds with whether this can successfully manifest into a big snow producing event though I think a light accumulation of snow Friday night or Saturday is likely while a bigger event remains possible. 

Jet stream configuration and trough axis along with the cold air is expected to shift west after this weekend lowering our prospects for the continuation of winter weather though not eliminating the chances for snowfall entirely. More spring-like temperatures or at least spring-like days have become more likely beginning Monday the 25th and I expect at least two of those in the week beginning that day.

No comments:

Post a Comment