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October 2011 General Discussion/Obs


Chicago Storm

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are you on crack or something?

A complex of showers and thunderstorms (there are t'storms along the trailing southern edge) could be called an MCS, right? Maybe that's stretching it a bit, but the complex is producing isolated areas of .5 in/hr rainfall rates per estimates, and if some of that changes to snow, which some has, that could translate to a couple inches of wet snow.

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A complex of showers and thunderstorms (there are t'storms along the trailing southern edge) could be called an MCS, right? Maybe that's stretching it a bit, but the complex is producing isolated areas of .5 in/hr rainfall rates per estimates, and if some of that changes to snow, which some has, that could translate to a couple inches of wet snow.

there it is.

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A complex of showers and thunderstorms (there are t'storms along the trailing southern edge) could be called an MCS, right? Maybe that's stretching it a bit, but the complex is producing isolated areas of .5 in/hr rainfall rates per estimates, and if some of that changes to snow, which some has, that could translate to a couple inches of wet snow.

MCSs have much more rigid definitions than just a complex of showers and thunderstorms. Also I would tend to disagree with the couple of inches of wet snow. Temps aren't cold enough.

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And an MCS doesn't happen when the temps are in the 30's. Also agree, it wouldn't snow let alone get a few inches.

MCS.......lol :facepalm:

You could get an elevated MCS when its cold, not quite 30s but I have seen some where its in the 40s at the surface, although aloft its over 14c, but these aren't common occurrence. Plus this isn't that type of atmosphere.

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That Oct 1989 event was something. Tim would know better than me but I don't think there's anything else even remotely close to that in October.

For central Indiana, no there's nothing really comparable. There was an event on October 30, 1993 that brought southern Indiana 2-6", but it wasn't as widespread and didn't have the high amounts of 1989.

For the LAF area, there's only been 5 October snowfalls of 0.1" or greater. So it's about a 1 in every 22 year occurrence. The 1989 storm had 6.7" at LAF, 6.0" at the WL COOP, and 9.5" at the Lafayette South COOP. 1925 would be second with 3.1".

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You could get an elevated MCS when its cold, not quite 30s but I have seen some where its in the 40s at the surface, although aloft its over 14c, but these aren't common occurrence. Plus this isn't that type of atmosphere.

It developed and organized better while it was over L Michigan, which definitely had surface temps in the 40s, if not higher. I'd love to argue details, but that was not the point I was trying to make.

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Doesn't the change in foliage have more to do with the decreasing amount of sunlight as opposed to frost? This is why, I've always presumed, places like Ottawa and North Bay have their leaves change faster.

As a general rule this is correct, but I believe there are aggrevating factors. For instance, if the time fall foliage emerges was exclusively sunlight dependent, then there would be a fixed date every year which you could expect a given tree to turn colours. But on my block, for instance, when/if fall foliage emerges fluctuates by several days each year. I think pcpn amounts, temps, frost, all play a secondary role.

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Had some sleet/rain ix a little while ago. (Holy crap @ NYC WSW 6-10")

Yeah i've been lurking their forums heavily and been watching TWC for the past few hours crazy stuffSnowman.gif Much more than anyone expected! Just goes to show that climo should be thrown out the window in similar situations ..

Makes me even more eager and hungry for the first flakes to fly and for winter to start..

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Interesting...

SPECIAL WEATHER STATEMENT

NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI

317 PM EDT SAT OCT 29 2011

MIZ075-082-292015-

LENAWEE-WASHTENAW-

317 PM EDT SAT OCT 29 2011

...SPECIAL WEATHER STATEMENT...

AT 311 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED

THUNDERSTORMS ALONG A LINE EXTENDING FROM 10 MILES WEST OF CHELSEA

TO 23 MILES WEST OF HUDSON...MOVING EAST AT 15 MPH. UPSTREAM

OBSERVATIONS HAVE REPORTED HAIL AS LARGE AS 0.50 INCH WITH THESE

STORMS. CONVECTIVE THUNDERSTORMS WILL BE POSSIBLE THROUGH THE PEAK

OF DAYTIME HEATING TODAY.

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