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January 2013 General Discussion


Chicago Storm

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After a minor sleet storm on Tuesday, today we got to near 50 while the deep-south got a nice little snow event. Future looks dry and cold here. May not hit freezing two consecutive days here next week. All I want is a nice 6+ inch snowstorm and then we can send the storms up north to you guys. But at this rate, we aren't going to see more than flurries here.

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Down to 14° at this hour. No WAA yet.

 

Lock in hour 300 on the GFS!

 

I was going to mention it.  A storm like that to end January with would make up for the boring January periods prior to that.  That's the beauty of being a big storm lover rather than a snow cover lover, one storm can make up for a lot of heartbreak.

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Regarding the upcoming cold snap, here's something for the LAF people. I mentioned the raw model output showing dewpoints of -15 or less here on Tuesday. I went back and found 97 days with dewpoints of -15 or lower at LAF since 1973. 94 out of those 97 days had a low temperature below zero.

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Just had a decent band come through, have the fluffiest dusting ever on cars, sidewalks, and roads. Always get this really fluffy snow when it's so cold out, 16 F on top of the met building even though warm air advection has been ongoing all night.

 

The real band is sliding past well to the north, up around Devil's Lake. I bet some people will see 1-2" in that.

 

Impressive 40-50 kt LLJ roaring from Iowa to Minneapolis, here comes the real warm up, NWS saying it'll get up to 40 F but GFS says more like mid 30s.

 

Special weather statement just issued for slippery roads, pavement is so cold that none of this fluff is gonna melt until we get some sun in a couple hours:

 

TEMPERATURES DURING THE SNOWFALL WILL REMAIN IN THE 15 TO 25DEGREE RANGE...WELL BELOW FREEZING. HENCE THE LIGHT SNOW WILLACCUMULATE ON UNTREATED ROADWAYS...POSSIBLY RESULTING IN SOMESLIPPERY SPOTS AND STRETCHES. EARLY MORNING COMMUTERS IN THESEAREAS SHOULD TAKE EXTRA PRECAUTION THIS MORNING.
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Still a LONG way to go this month...but it is time to start taking a peak at January snowfall futility. Snowcover-wise, this January is already guarenteed to not even touch the top 25 barest Januaries...but only 0.6" of snow has fallen so far.

 

Top 10 least snowy Januaries

01.) 0.4" - 1933

02.) 0.8" - 1921

03.) 0.9" - 1932

04.) 1.1" - 1916

05.) 1.4" - 1894

06.) 1.4" - 1935

07.) 1.5" - 1891

08.) 1.5" - 1983

09.) 1.6" - 1890

10.) 1.7" - 1919

11.) 1.9" - 1944

12.) 2.4" - 1973

13.) 2.6" - 1896

14.) 2.8" - 1980

15.) 2.9" - 1955

16.) 3.3" - 1942

17.) 3.3" - 1961

18.) 3.4" - 1958

19.) 3.4" - 2001

20.) 3.7" - 1882

 

Side note...what an absolute DISASTER January 1932-35 was

 

Year.......Snow....1"+ snwcover days...Mean temp.....notes

1932.......0.9"..........0...........36.7F......warmest Jan....3rd least snowy...18 days over 40F, 7 days over 50F

1933.......0.4"..........0...........34.7F......4th warmest Jan....least snowy...17 days over 40F, 1 day over 50F, 0.4" snow Jan 30th only snow of Jan

1934.......6.0"..........8...........30.0F......9 days over 40F, 3 days over 50F

1935.......1.4"..........4...........24.8F......5th least snowy....5 days over 40F

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Still a LONG way to go this month...but it is time to start taking a peak at January snowfall futility. Snowcover-wise, this January is already guarenteed to not even touch the top 25 barest Januaries...but only 0.6" of snow has fallen so far.

 

Top 10 least snowy Januaries

01.) 0.4" - 1933

02.) 0.8" - 1921

03.) 0.9" - 1932

04.) 1.1" - 1916

05.) 1.4" - 1894

06.) 1.4" - 1935

07.) 1.5" - 1891

08.) 1.5" - 1983

09.) 1.6" - 1890

10.) 1.7" - 1919

11.) 1.9" - 1944

12.) 2.4" - 1973

13.) 2.6" - 1896

14.) 2.8" - 1980

15.) 2.9" - 1955

16.) 3.3" - 1942

17.) 3.3" - 1961

18.) 3.4" - 1958

19.) 3.4" - 2001

20.) 3.7" - 1882

 

Side note...what an absolute DISASTER January 1932-35 was

 

Year.......Snow....1"+ snwcover days...Mean temp.....notes

1932.......0.9"..........0...........36.7F......warmest Jan....3rd least snowy...18 days over 40F, 7 days over 50F

1933.......0.4"..........0...........34.7F......4th warmest Jan....least snowy...17 days over 40F, 1 day over 50F, 0.4" snow Jan 30th only snow of Jan

1934.......6.0"..........8...........30.0F......9 days over 40F, 3 days over 50F

1935.......1.4"..........4...........24.8F......5th least snowy....5 days over 40F

Josh, I think we are in a 1932-1935 type period now.... Disaster, thankfully it will end eventually.

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What was the total precip for those 4 years for the month of January ?? In a glance I think the overall rsult of snowless is the same but the winters are much different feel to them.  I hope... 3 more winter like this will drive many into the poor house. There are alot of industries and regions of the north which count on the snow...

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We actually had a little burst of snow this morning... Add another 1/4 to 1/2 inch to the total...

 

Another band looks like it is trying to form. Still waiting to see over an inch from a non-lake effect event around here.

 

At least the ground is somewhat white! :)

 

Nothing but flurries here.  Ground is bare again.

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3.5" of new snow today and still coming down moderately.  Best event of the winter so far.

 

At least someone's getting snow today! :snowing:

 

Low over achieved this morning at 10°. Up to 34 37° now.

 

GGEM showing that arctic front snow still..

 

P6_GZ_D5_PN_039_0000.gif

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At least someone's getting snow today! :snowing:

Low over achieved this morning at 10°. Up to 34 37° now.

GGEM showing that arctic front snow still..

It did back off a bit from previous runs. Looking at the soundings from the NAM and GFS, the issue is the wave runs into a brick wall of dry air aloft once to northern IL. I'm less optimistic than I was a few days ago but there's still time for changes. It would be nice if the Canadian could be right and an inch or so of snow falls to see how cold we get Mon night. The NAM has -26 (!) 850s over us late Monday.

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At least someone's getting snow today! :snowing:

Low over achieved this morning at 10°. Up to 34 37° now.

GGEM showing that arctic front snow still..

It did back off a bit from previous runs. Looking at the soundings from the NAM and GFS, the issue is the wave runs into a brick wall of dry air aloft once to northern IL. It would be nice if the Canadian could be right and an inch or so of snow falls to see how cold we get Mon night. The NAM has -26 (!) 850s over us late Monday.

 

Darn dry air... I was just looking at the Canadian for Monday. A robust clipper compared to the GFS.

 

I have a feeling this cold snap is going to lead to some water pipe breaks some places.

 

Edit: That wind today is not enjoyable.

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On that GGEM map, the lightest blue shade (Chicago area) is only 0.1 mm to 0.5 mm of liquid in 3 hours...which translates to 0.004" to 0.02" of liquid. 

 

So, even taking the higher end of that range and assuming a 20:1 ratio, it's only 0.4" of snow.

 

Thanks for pointing that out. I was thinking that was cm for some reason. I'm surprised that the model would even bother plotting under 1mm of water. A non-event for the GGEM.

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