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December 28th - 29th Blizzard


Powerball
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MSP radar doesn't look too good to me.  Hope it fills in and enhances in short order.

It’ll be interesting to see how this plays out. It’s snowing pretty hard despite what the radar is showing. Models always showed a less intense but consistent and prolonged moderate snowband pivoting over central Minnesota which is where the majority of our accumulation is supposed to come from. The initial heavy band was never supposed to last long or add up to much. Radar looks about what I would expect.


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DTX

Frontal passage around or just after midnight, as deepening surface
low tracks into Lake Huron tonight. Strong high res model consensus
(RAP/3k NAM/ARW/ARW2/HRRR/Euro) with the low deepening to around 975
MB by Monday morning near Georgian Bay. With at least 55-60 knots of
flow at the 850 MB level, confidence is high in occasional wind
gusts of 45-55 MPH throughout Monday, with a surface trough passage
around mid day also likely providing a focus. Steepening low level
lapse rates and inversion heights aoa 7 kft, along with much of the
cloud depth/minimal cape in the dgz will be conducive to snow
showers/squalls, and isolated wind gusts to 60 MPH seem likely in the
convective rolls. With the soaked ground from today`s rainfall,
weakened tree limbs from the ice storm, and long duration of strong
wind gusts tonight through early tomorrow evening, have elected to go
with high wind warning for all of southeast Michigan. Expecting to
see a significant number of power outages. 6z Euro ensemble meteograms
indicating close to the half members supporting 55-60 MPH peak wind
gusts as well.

The strong winds and snow squalls will make for tough travel
conditions on Monday, despite just an inch or two of snow
accumulation as 700 MB cold pool (-20 C)/trough axis tracks through.
Any leftover standing water will also freeze for the Monday morning
commute as temps fall into the upper 20s.

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MKX mentioned a potential upgrade to Blizzard warnings for the northern CWA if some of the higher end winds come to fruition in their afternoon AFD. Even without that, wind gusts up to 60 mentioned which iirc would be our strongest synoptic wind event since 12/15/21. So that's fun I guess.

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Agreed, we were about to go into the depths of winter with a few inches of old glacier and no snow prospects. Today (plus a couple weak clippers this week?) will make everything pretty again. And it will help the ski trails.

Noticed the 4 inches is on half an inch of precipitation, even if a little of that was early morning rain not the most efficient snow with it being warm early then windy later


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Lake effect blizzard conditions will develop rapidly across lower MI tonight and SW Ontario by morning. Heavy snow squalls with winds gusting to 55-60 mph will quickly make many highways impassable, unprepared drivers are going to be stranded in dangerous situations. I am not sure how much awareness has been created by public forecasts of these rapidly oncoming changes. Given the way the low is deepening and severe cold phasing into the circulation, and still fairly warm temps Lakes Michigan and Huron, potential for emergency situations is high. This will spread to parts of central ON, nwPA and wNY by late morning and upstate NY by afternoon-evening. 

Goderich to London ON needs a max alert as NW winds funnel mega-squall conditions directly across the London region. My guess is 401 will be closed or at least impassable from Chatham to Woodstock by 0900h. 

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