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December 2011 General Discussion/Obs


Chicago Storm

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did the same thing on the way home from COD but not a full changeover.

Don't think I've seen LES on this side of the lake before a decent synoptic snow event.

A little OT, but ... quality lake-effect is rare on the windward side of Lake Michigan, true. However, one of the more memorable aspects of the GHD blizzard was the two inches or so of pure lake-effect snow that fell that Tuesday morning in DeKalb (yes, DeKalb, 65 miles away from the lake). Of course, that was just before one of the most interesting synoptic set-ups in many years.

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A little OT, but ... quality lake-effect is rare on the windward side of Lake Michigan, true. However, one of the more memorable aspects of the GHD blizzard was the two inches or so of pure lake-effect snow that fell that Tuesday morning in DeKalb (yes, DeKalb, 65 miles away from the lake). Of course, that was just before one of the most interesting synoptic set-ups in many years.

Not entirely true the past few years at least.. 6-12 inches christmas last year.. March 2009 12"++ in SE Wisonsin, and a couple more events I have to dig up.. Definitely not the quality of the other side, but its not nonexistent/rare either. Usually there are AT LEAST a couple of decent events a year on this side of the lake..

March 2009- http://www.crh.noaa....p?MO=03&YR=2009

Christmas last year..

dec25_26_2010%20snow.JPG

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A little OT, but ... quality lake-effect is rare on the windward side of Lake Michigan, true. However, one of the more memorable aspects of the GHD blizzard was the two inches or so of pure lake-effect snow that fell that Tuesday morning in DeKalb (yes, DeKalb, 65 miles away from the lake). Of course, that was just before one of the most interesting synoptic set-ups in many years.

I don't think I'd call that pure LES looking over the radar data just now. It was more the back edge of the deformation band/lake enhanced area of snow moving through and transitioned more to a typical single band LES look closer to the lake.

But I'd disagree, we have had several good LES events on this side of the lake the past few years even this far west. I even picked up 1.1" in 20 mins during one of them.

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Wow, it's already down to -11 at a few locations in northwest Iowa as we approach midnight. That's astounding to me as we've only dropped to 18 for our coldest temp of the season so far. Amazing what fresh snow cover can do.

This is why I'm somewhat thankful we don't have fresh snowcover in Madison, this cold spell will be way more bearable with the ground still absorbing radiation.

Being even this close to a snowpack is making our weather more miserable though, more cold air and more clouds than if it wasn't there.

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Getting close to 50.00" of precipitation for the year at LAF. I did have to "estimate" the May total due to airport not reporting correctly (used the WL COOP total), but we're 1.66" away from reaching 50".

At the WL COOP, which has the area's longest set of records dating back to 1901, there have been only four years that had 50"+...1909, 1927, 1929, and 1957.

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Last year at this time, this first significant event of the season had wrapped up a day earlier. Good times.

http://www.americanwx.com/bb/index.php/topic/1648-123-126-mwgl-snow-event/

Snowfall totals from major and first order sites for December 3-5, 2010

Minneapolis MN (MSP): 6.1"

St. Cloud MN (STC): 5.0"

Chanhassen MN (MPX): 8.3"

Rochester MN (RST): 9.0"

Waterloo IA (ALO): 1.4"

Mason City IA (MCW): 1.1"

Davenport IA (DVN): 4.9"

Dubuque IA (DBQ): 8.1"

Milwaukee WI (MKE): 3.6"

Madison WI (MSN): 4.2"

La Crosse WI (LSE): 7.1"

Eau Claire WI (EAU): 3.8"

Chicago IL (ORD): 5.1"

Rockford IL (RFD): 6.4"

Peoria IL (PIA): 3.6"

Moline IL (MLI): 2.5"

Indianapolis IN (IND): 3.0"

Cincinnati OH (CVG): 3.2"

Dayton OH (DAY): 1.9"

Louisville KY (SDF): 1.6"

Lexington KY (LEX): 2.7"

Jackson KY (JKL): 4.5"

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GFS a little better for the Thu/Fri deal. Probably a stripe of 1-2" snows from southern IA all the way through southern MI.

Oh ya def. BMI/PIA would look good for around 2" or so given the high ratio nature of it.

The 12z NAM is finally catching up but still south. Has the band from central NE to central MO.

GGEM is probably good for a band of 2-5", if indeed the high ratios were to work out.

Edit: ECMWF holds its track from previous runs, and has a narrow area that would be worthy of 1-2" at most.

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