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Early January Major/Potential Record Cold


Hoosier

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GRB

 

 MON 06| TUE 07| WED 08|

-13  -6|-19  -3|-11   8

 

LSE

 

 SUN 05| MON 06| TUE 07| WED 08|

-14  -6|-21 -11|-25  -3|-12   9

 

MSN

 

 SUN 05| MON 06| TUE 07| WED 08|

 -7  -5|-18 -10|-22  -6|-13   8

 

MKE

 

 MON 06| TUE 07| WED 08|

-10  -5|-15   0| -7  10

 

RAC

 

 MON 06| TUE 07| WED 08|

-11  -6|-17  -3| -9   9 

 

LSE and MSN stay below zero for at least 72hrs...

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Here's a list of below zero highs for Lafayette.  I used the airport from 1944-present and the longtime COOP from 1887-1943, with the exception of the January 1963 reading which was obtained from the COOP.

 

Should say that the records go back to the winter of 1887-1888 and I don't have data from the early months of 1887.

 

 

-10:  12/24/1983

-9:  1/24/1963

-9:  1/15/1972

-7:  1/20/1985

-7:  1/18/1994

-6:  2/9/1899

-6:  1/16/1977

-6:  1/10/1982

-5:  12/25/1983

-3:  1/17/1977

-3:  12/23/1983

-3:  12/22/1989

-3:  1/15/1994

-2:  2/8/1895

-2:  2/12/1899

-1:  2/10/1899

-1:  1/8/1970

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IND Long Term AFD updated a few ago:

 

Tried to bold the phrasing about "the potential to be colder than models indicate" but bold didn't come through.

LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/    ISSUED AT 221 PM EST WED JAN 1 2014    ROUND TWO OF THREE WINTER STORMS WILL BE MOVING INTO THE AREA SUNDAY  MORNING THROUGH LATE MONDAY MORNING. BUT...THIS STORM WILL BE  ACCOMPANIED BY WHAT IS EXPECTED TO BE THE COLDEST AIR OF THE  SEASON MONDAY NIGHT AND TUESDAY. SO THE CHALLENGE IS HOW COLD WILL  IT GET AFTER WE RECEIVE ANOTHER 2 TO 5 INCHES OF SNOW BY MONDAY  AFTERNOON.    THE ECMWF HAS BEEN VERY CONSISTENT THE LAST FEW DAYS IN BRINGING  IN A SLIGHTLY MORE AMPLIFIED MID-UPPER LEVEL TROUGH THAN THE LAST  ONE. THIS OPENS THE DOOR FOR AN AIR MASS TO EXTEND FROM THE EXTREME  NORTHWEST CANADIAN TERRITORIES SOUTHEASTWARD STRAIGHT INTO THE  LOWER OHIO VALLEY MONDAY NIGHT. PRETTY MUCH TOOK THE REGIONAL  ALL BLEND AND MASSAGED THE TEMPERATURES DOWNWARD AS PER THE ECMWF  DUE TO ITS CONSISTENCY AND THE FACT THAT WITH SNOW COVER AND A  1060 AIR MASS INTO MT THEN 1040 INTO THE CENTRAL PLAINS AND MID MS  VALLEY...THERE IS THE POTENTIAL FOR THE NUMBERS TO BE SLIGHTLY  COLDER THAN MODELS INDICATE EVEN THOUGH THE TRENDING TOWARDS THIS  TYPE OF THE SOLUTION CONTINUES.    SO...THE BOTTOM LINE FOR THIS PERIOD IS SOME MORE SNOW AND BLOWING  SNOW DURING THIS PERIOD AND FRIGID TEMPERATURES FOR MONDAY NIGHT  AND TUESDAY. 
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Not sure if Tuesday or Wednesday morning will be colder around here.  The core of the cold air aloft moves off to the east by early Wednesday but it may be a better radiational cooling setup then if latest runs hold.  Wednesday morning should also have a bit of a head start coming off of an extremely cold Tuesday.

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Most of the legendary cold days around here only had snow cover of about 2-4".  If the current system and weekend/early week system pan out then we are looking at the potential for much deeper snow in time for the arctic blast not to mention the upstream snow cover. 

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Not sure if Tuesday or Wednesday morning will be colder around here.  The core of the cold air aloft moves off to the east by early Wednesday but it may be a better radiational cooling setup then if latest runs hold.  Wednesday morning should also have a bit of a head start coming off of an extremely cold Tuesday.

I'd have to think Wednesday morning sees colder temperatures by a bit (especially if you can get some snow down at some point before then) but Tuesday morning may be more brutal with winds staying up some. I wonder how cold wind chills can get Tuesday morning across parts of IL, IN and OH. Models unanimously show air temps below -10F and winds staying up around 10-15 knots. If temps closer to -20F verify like most models show for Tuesday morning we could be looking at wind chills of -30 to -40F by my crude math...possibly colder if some lucky spots get close to -20F and keep winds up near 15 knots.

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LOT

 

FOR TEMPS THINKING MAX TEMPS WILL BE REACHED EARLY SUNDAY MORNING AS
TEMPS CONTINUE TO FALL. GUIDANCE HAS 925MB TEMPS AT -10C TO -20C BY
LATE AFTN..WHICH IS NOTHING COMPARED TO THE -25C TO -30C EXPECTED BY
DAWN ON MONDAY. LOWS WILL BE BELOW ZERO FOR ALL LOCATIONS...EXPECT
AREAS ALONG THE LAKE IN NW INDIANA. NORTHWEST FLOW SHOULD KEEP
THOSE LOCATIONS RIGHT AROUND 0. WITH FRESH SNOW ON THE
GROUND...COULD EASILY SEE TEMPS BEING LOWER...BUT GIVEN CLOUD SKIES
AND WINDS 10+MPH...THINKING THERE WILL BE ENOUGH MIXING TO REMAIN ON
THE CONSERVATIVE SIDE. MIN WIND CHILLS LESS THAN -20F ARE EXPECTED.

EXTENDED...MONDAY AND TUESDAY
COLD CONTINUES THROUGH EARLY NEXT WEEK AS THE UPPER LEVEL TROUGH
SLOWLY ROTATES THROUGH. THE COLDEST AIR ALOFT IS EXPECTED MONDAY
INTO MONDAY NIGHT WITH 925MB TEMPS BELOW -30C. HIGHS MONDAY WILL
LIKELY REMAIN BELOW ZERO...EXCEPT ONCE AGAIN FOR AREAS NEAR THE LAKE
ACROSS NW INDIANA. WIND CHILLS OF -20F TO MAYBE -35F ARE CURRENTLY
FORECAST. ONCE AGAIN...AMBIENT TEMPS MAY BE EVEN COOLER THAN
FORECAST.

IF YOU THINK THATS COLD YOU SHOULD SEE MONDAY NIGHT. MOISTURE
SHIFTS EAST AND THINKING CLOUDS WILL BEGIN TO THIN AFTER MIDNIGHT
FROM WEST TO EAST. THIS ONCE AGAIN COULD CERTAINLY LEAD TO MUCH
COLDER AMBIENT TEMPS. RIGHT NOW HAVE -10 TO -20F FORECAST WITH WIND
CHILLS AROUND -40F. A LITTLE RELIEF IS EXPECTED TUESDAY BUT TEMPS
WILL STILL BE BELOW 0. WINDS WILL BE DIMINISHING AS HIGH PRESSURE
SPREADS OVERHEAD. TUESDAY NIGHT WILL ONCE AGAIN BE BITTERLY COLD
WITH -10 TO -20F AND WIND CHILLS AROUND -30F.

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The 18z GFS has the 486 thickness contour poking into NW IL at 9z (3AM CST) on Monday 1/6.  It also pushes the cold air in faster...so that, for many areas in the Midwest, Mon/Tues will probably be the coldest days, not Wed.  Of course that's just based on this one model run.

 

Also, on this model run, 850 temps bottom out at around -28c in Chicago.  This is a bit milder than the 00z Euro from last night, which showed widespread -30c and colder 850s over the area.

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The 18z GFS has the 486 thickness contour poking into NW IL at 9z (3AM CST) on Monday 1/6.  It also pushes the cold air in faster...so that, for many areas in the Midwest, Mon/Tues will probably be the coldest days, not Wed.  Of course that's just based on this one model run.

 

Also, on this model run, 850 temps bottom out at around -28c in Chicago.  This is a bit milder than the 00z Euro from last night, which showed widespread -30c and colder 850s over the area.

 

 

Something I noticed on the GFS is that it has the coldest air below 850 mb...say around 925 mb-950 mb and mixing would be very shallow if that's correct. 

 

Also noticing the models spitting out some light precip as the colder air comes in. 

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Something I noticed on the GFS is that it has the coldest air below 850 mb...say around 925 mb-950 mb and mixing would be very shallow if that's correct. 

 

Also noticing the models spitting out some light precip as the colder air comes in. 

 

I noticed that too and it probably makes sense.  Maybe a nice squall line developing on the leading edge?

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