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January 10th-12th Winter Storm Potential


Thundersnow12
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6 minutes ago, Chicago Storm said:

Ukie came in with a good hit NE. IL and surrounding areas...warning criteria snows with the main system.

It has been steadfast in it's more east solution for days. Could be a solid victory for it, if it pans out.

So no credit to the "trash" GFS that has been on the more east track from the get go?

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Just now, Hoosier said:

Feeling pretty good about getting some snow.  Fairly low confidence on amounts though.  I think about 1" is worst case but if things go better, maybe more like 2-4"

Ground will be very wet of course but many hours will be spent around 33-35 degrees before that, with temps dropping pretty quickly after.  

voice of reason...

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Chicago appears to be in line for a relatively uncommon January precipitation event where 1.50" or more rain falls over a two-day period.

The 500 mb pattern is a classic one for high precipitation events in January when the Arctic Oscillation is positive:

ORD01102020.jpg

Since 1871, Chicago has had just 16 storms bring 1.50" or more precipitation over a two-day period in January. It has had only 5 storms bring 2.00" or more precipitation over a two-day period in January.

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8 minutes ago, donsutherland1 said:

Chicago appears to be in line for a relatively uncommon January precipitation event where 1.50" or more rain falls over a two-day period.

The 500 mb pattern is a classic one for high precipitation events in January when the Arctic Oscillation is positive:

ORD01102020.jpg

Since 1871, Chicago has had just 16 storms bring 1.50" or more precipitation over a two-day period in January. It has had only 5 storms bring 2.00" or more precipitation over a two-day period in January.

Hey Don, thanks for sharing that.  I posted a while back about how it is even more rare to have a 2"+ precip event including at least 1" of snow in the month of January.  The only one that strictly meets that definition is the 1967 storm, though there was another one that began on New Years eve in 1890 and spilled over into January.  

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7 minutes ago, Hoosier said:

Hey Don, thanks for sharing that.  I posted a while back about how it is even more rare to have a 2"+ precip event including at least 1" of snow in the month of January.  The only one that strictly meets that definition is the 1967 storm, though there was another one that began on New Years eve in 1890 and spilled over into January.  

The 1967 storm was really special.

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