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October 2012 General Discussion


Powerball

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it's a pretty minor shift and it was 48 hours out at the time...not sure what's so shocking

A 150 mile shift a day or two out is minor? Many models had the deformation zone going from Madison to Sheboygan, now it's the Chicago area or even south. HPC had the heaviest swath of rain north, now no one will get the 3-4" totals.

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I think the latest shift in the NAM is a bit extreme to the SE. GFS still has the corridor of heaviest rain about the same as last nights run of itself and the NAM. RGEM/GGEM looks really good!

I'd be happy with ~1.5" of rain.

Lake effect clouds moving in right now, along with a few showers as well. Had a low of 32° this morning.

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A 150 mile shift a day or two out is minor? Many models had the deformation zone going from Madison to Sheboygan, now it's the Chicago area or even south. HPC had the heaviest swath of rain north, now no one will get the 3-4" totals.

Pretty much a lock someone in MKE or LOT cwa sees 3"+

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Pretty much a lock someone in MKE or LOT cwa sees 3"+

Maybe, but it looks like more of an equal opportunity soaking now. It looks like the initial surge of warm frontal precip will be a tad north of where most of the low/deformation band rain tracks. There might be some overlap, likely near the WI/IL border, and those areas might see localized 3"+ amounts.

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Skilling showing the averaged together rainfall amounts focusing on Chicago to Saginaw Bay. 3.15" for MDW. About 1.55" for Waukegan and 2.5" for ORD.

Edit: All of the southeastern most counties in WI had over an inch of rain.

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Read HPC's disco this morning and found these couple nuggets:

AN UPPER LOW COULD CLOSE OFF

BETWEEN THE GREAT LAKES AND ONTARIO ON THURSDAY OR NEXT FRIDAY

(WHICH WOULD ENHANCE THE CHANCES OF COLD AIR POURING DOWN ACROSS

THE NORTHERN PLAINS/UPPER MIDWEST NEXT FRIDAY),

, AN ALBERTA CLIPPER SHOULD

BRING MODERATE PRECIPITATION DUE TO ONSHORE FLOW INTO THE

NORTHWEST/NORTHERN CONTINENTAL DIVIDE THURSDAY INTO NEXT FRIDAY,

WITH LIGHT PRECIPITATION EXPECTED ACROSS THE NORTHERN PLAINS BY

NEXT FRIDAY, POSSIBLY IN THE FORM OF SNOW.

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Hard to say for sure but based on the WU model map it looks like a wide spread 1.5-2" with a pocket or two going up to 3-4", maybe more in very localized spots.

http://www.wunderground.com/wundermap/

Yeah I've seen those maps. You can get a rough estimate of rainfall from this source. When the snowfall starts showing up I'll add up the numbers and figure out a possible range of snow accumulation.

...

Meanwhile. Looks like Tropical got his frost this morning! Low of 29°.

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Sorry for posting in this thread, but you don't think there will be any precip with a 996mb low. The low was 987mb on the MN/WI border. The cold air at that time was in ND.

200sjur.gif

wvefds.gif

The system occludes and pretty well falls apart. There's pretty much no precip in Illinois.

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