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September 2012 General Discussion


Brewers

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12z GFS had a disturbance that was borderline rain/snow Friday night into Saturday morning over the arrowhead of Minnesota. Now the 18z does the same thing mainly in NW Wisconsin. Could be something to watch for the first snow system in the Upper Midwest.

Is that feasible? I know they have latitude on their side, but it's still only mid-September.

btw...not a rhetorical question. Not certain of the snow climatology up thataway.

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Is that feasible? I know they have latitude on their side, but it's still only mid-September.

btw...not a rhetorical question. Not certain of the snow climatology up thataway.

Typically in September in NE MN there is a dusting in some areas. DLH averages 0.1". I guess it is possible to see a little this weekend.

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Is that feasible? I know they have latitude on their side, but it's still only mid-September.

btw...not a rhetorical question. Not certain of the snow climatology up thataway.

I'm pretty sure they've had September snows of some consequence in the Northwoods of Wisconsin and Northern Minnesota, and much of the precip with the disturbance/clipper is expected to occur overnight. This wouldn't even be a question if it looked like it would occur during the daylight hours, but the timing appears to make it plausible to at least see some snow mix in, given how close we were today (37 and rain in Manitowish Waters and 41 and rain in Rhinelander I believe).

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Typically in September in NE MN there is a dusting in some areas. DLH averages 0.1". I guess it is possible to see a little this weekend.

I'm pretty sure they've had September snows of some consequence in the Northwoods of Wisconsin and Northern Minnesota, and much of the precip with the disturbance/clipper is expected to occur overnight. This wouldn't even be a question if it looked like it would occur during the daylight hours, but the timing appears to make it plausible to at least see some snow mix in, given how close we were today (37 and rain in Manitowish Waters and 41 and rain in Rhinelander I believe).

Seems like it's possible then. I love snow but September seems a touch too early, even for me. I think the earliest I've ever witnessed snow imby was ~6th or 7th of October. And even then it was only a few passing wet flakes.

Given that at least a little light snow in Sept isn't uncommon in N WI/MN, I bet if one were to scour the record books there was probably a late Sept. plastering of a couple of inches at some point.

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Seems like it's possible then. I love snow but September seems a touch too early, even for me. I think the earliest I've ever witnessed snow imby was ~6th or 7th of October. And even then it was only a few passing wet flakes.

Given that at least a little light snow in Sept isn't uncommon in N WI/MN, I bet if one were to scour the record books there was probably a late Sept. plastering of a couple of inches at some point.

We had a thread last year on September snow, I'm not sure which forum it was located in, but I'm pretty sure there was at least one snow event listed that impacted the Upper Midwest.

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Seems like it's possible then. I love snow but September seems a touch too early, even for me. I think the earliest I've ever witnessed snow imby was ~6th or 7th of October. And even then it was only a few passing wet flakes.

Given that at least a little light snow in Sept isn't uncommon in N WI/MN, I bet if one were to scour the record books there was probably a late Sept. plastering of a couple of inches at some point.

You would be correct. DLH had 2.4" on Sept. 18, 1991. That's the biggest total I could find.

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So, Tropical, err Cromartie, how's that "good luck getting me below 40F" going? I see a Wunderground observation right now of 40 on the nose. Doesn't surprise me given you're away from the urban heat island and not right next to the lake. You will probably experience at least a roof frost, if not a plant damager.

Down to 37 now at West Bend..

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I thought for sure you were going to post the 0z GFS maps about 84 hours out, where a clipper type system is perilously close to being a consideration for some frozen precip.

That's pretty crazy looking!

Down to 40.1° here. 39° at Kenosha.

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That's pretty crazy looking!

Down to 40.1° here. 39° at Kenosha.

Yeah, the reason I'm talking about it is because it is no longer in fantasy land. Even though it is highly unlikely to be much if any accumulation from any disturbance this time of year, it will be interesting to even get one snow observation or at least mix observation out of this potential event.

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Interesting scenario on the 0z GFS that drops snow on parts of WI. A very strong wave drops southeast across the area with a nearly 100kt jet streak at H5, coupled with very cold air aloft for this time of year (-16 deg C at 700mb) and a small pocket of -6 deg C at 850mb. The column gets cold enough for snow during the early morning hours as this run shows sfc temps getting into the upper 20's. Something to watch.

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Interesting scenario on the 0z GFS that drops snow on parts of WI. A very strong wave drops southeast across the area with a nearly 100kt jet streak at H5, coupled with very cold air aloft for this time of year (-16 deg C at 700mb) and a small pocket of -6 deg C at 850mb. The column gets cold enough for snow during the early morning hours as this run shows sfc temps getting into the upper 20's. Something to watch.

So crazy we are legitimately talking about this on September 18!!! And 84hr GFS too insane!!!

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Interesting scenario on the 0z GFS that drops snow on parts of WI. A very strong wave drops southeast across the area with a nearly 100kt jet streak at H5, coupled with very cold air aloft for this time of year (-16 deg C at 700mb) and a small pocket of -6 deg C at 850mb. The column gets cold enough for snow during the early morning hours as this run shows sfc temps getting into the upper 20's. Something to watch.

It is the right time of day, I would like to see the 850mb temps a touch colder, -6 is borderline this time of year. Still incredible to be talking about this irregardless.

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