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December 20-22 Major Winter Storm Part 3


Hoosier

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Measured in multiple spots with a ruler and estimate 9-10" at the moment, maybe an inch of that is from the previous storm. Poor dude was trying to get out of my parking lot and couldn't even move a few feet, even though he has a jeep.

Interesting. I'm approaching 16" here - making me second guess myself. Taken three clean measurements off the deck. pretty high confidence as I'm taking multiple measurements each time and they are all right around the same depth. Winds haven't been a factor so far.

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DISCUSSION...A STRONG COLD FRONT WILL TRACK ENEWD ACROSS PARTS OF
  CNTRL IND THIS AFTERNOON WHILE A SFC LOW SHIFTS NEWD TOWARD CHICAGO.
  A NARROW CORRIDOR OF SFC HEATING OWING TO POCKETS OF INSOLATION
  AMIDST UPPER 40S SFC DEWPOINTS IN ADVANCE OF THE FRONT IS SUPPORTING
  VERY MARGINAL INSTABILITY WITH MLCAPE VALUES OF 50-100 J/KG.
  HOWEVER...GIVEN THE STRONG SFC-LAYER CONFLUENCE ALONG THE FRONT...A
  LINE OF LOW-TOPPED CONVECTION WILL TRACK EWD/ENEWD ACROSS CNTRL
  IND...REACHING THE INDIANAPOLIS AREA BETWEEN 1830Z AND 1930Z.
  DOWNWARD MOMENTUM TRANSPORT IN THE STRONGEST CONVECTION MAY SUPPORT
  AN ISOLATED SVR WIND GUST OR TWO GIVEN 50 KT OF 1-KM-AGL SLY FLOW
  PER INDIANAPOLIS VWP DATA. THESE DATA ALSO INDICATE 35-40 KT OF
  0-1-KM BULK SHEAR WITH MODEST DIRECTIONAL SHEAR IN THE LOW
  LEVELS...AND THE DEVELOPMENT OF A TORNADO CANNOT BE RULED OUT.
  REGARDLESS...LIMITED BUOYANCY WILL PRECLUDE THE DEVELOPMENT OF A
  MORE SUBSTANTIAL SVR THREAT OWING TO COLDER MID-LEVEL TEMPERATURES
  BEING REMOVED WELL TO THE W OF THE REGION.

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Interesting. I'm approaching 16" here - making me second guess myself. Taken three clean measurements off the deck. pretty high confidence as I'm taking multiple measurements each time and they are all right around the same depth. Winds haven't been a factor so far.

Are you sure snow from the roof isn't blowing onto that deck? MSN just measured a snow depth of 8 inches as of noon, blowing is cutting it down several inches for sure with gusts to 33 mph and increasing, real running snow total is probably 10-12" considering the liquid total of 1.15".

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Racking up a nice rainfall total with this one here, just had a decent burst move through. I'm on my phone so I can't check, but its probably been awhile since LAF has seen this much rain in one day.

Am I crazy or was there some flakes/pellets mixing in the heavier bursts? Maybe just up here on the 9th floor...

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New Blizzard Warning from ILX

URGENT - WINTER WEATHER MESSAGE

NATIONAL WEATHER SERVICE LINCOLN IL

1215 PM CST THU DEC 20 2012

...DANGEROUS WINTER STORM TO AFFECT THE MIDWEST...

.STRENGTHENING LOW PRESSURE WILL TRACK THROUGH SOUTHERN ILLINOIS TO THE

SOUTHERN TIP OF LAKE MICHIGAN TODAY. TOTALS OF 3 TO 5 INCHES ARE

POSSIBLE WEST OF THE ILLINOIS RIVER...WITH AROUND 2 INCHES AS FAR

EAST AS THE I- 55 CORRIDOR. HOWEVER...EXTREME WINDS EXPECTED TO

GUST IN EXCESS OF 50 MPH THIS AFTERNOON AND EVENING...WILL DROP

VISIBILITIES TO BELOW ONE QUARTER OF A MILE IN SNOW AND BLOWING

SNOW...RESULTING IN BLIZZARD CONDITIONS.

ILZ043-052-053-202215-

/O.NEW.KILX.BZ.W.0001.121220T1815Z-121221T0600Z/

DE WITT-CHRISTIAN-MACON-

INCLUDING THE CITIES OF...TAYLORVILLE...DECATUR

1215 PM CST THU DEC 20 2012

...BLIZZARD WARNING IN EFFECT UNTIL MIDNIGHT CST TONIGHT...

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A BLIZZARD

WARNING...WHICH IS IN EFFECT UNTIL MIDNIGHT CST TONIGHT.

* TIMING...SNOW BEGINNING TO SPREAD INTO CENTRAL ILLINOIS. SNOW IS

THEN EXPECTED THROUGH THE AFTERNOON THROUGH MID EVENING.

* ACCUMULATIONS...TOTAL ACCUMULATIONS OF 3 TO 5 INCHES ARE LIKELY

BY LATE EVENING NORTHWEST OF THE ILLINOIS RIVER VALLEY...AND 2

TO 3 INCHES FROM THE INTERSTATE 55 CORRIDOR TO THE ILLINOIS

RIVER...WITH LOCALLY HIGHER AMOUNTS POSSIBLE.

* WIND...SOUTHERLY WINDS WILL SHIFT TO THE NORTHWEST AROUND AND

RAPIDLY INCREASE. WIND GUSTS OF 50 TO 55 MPH OR HIGHER WILL BE

WIDESPREAD BY 3 PM...AND REMAIN THAT HIGH UNTIL AROUND 9 PM.

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Are you sure snow from the roof isn't blowing onto that deck? MSN just measured a snow depth of 8 inches as of noon, blowing is cutting it down several inches for sure with gusts to 33 mph and increasing, real running snow total is probably 10-12" considering the liquid total of 1.15".

I would say wind hasn't been a concern up until the last 2 hours or so. Took multiple measurements in the area and it was consistent. Been checking reports from around the area and it feels like I'm a little high. I haven't checked liquid yet.. that should help me see where I'm at.

EDIT: Overnight total (7.8") was spot on with other measurements in the area

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I would say wind hasn't been a concern up until the last 2 hours or so. Took multiple measurements in the area and it was consistent. Been checking reports from around the area and it feels like I'm a little high. I haven't checked liquid yet.. that should help me see where I'm at.

EDIT: Overnight total (7.8") was spot on with other measurements in the area

you are west of madison and had less of a WAA push, it makes sense for your totals to be higher.

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I'm at ground level at work. And yes, you may be crazy. ;):D

Probably true :P

I see LAF is now under a WWA and High Wind Warning. Should have just cut to chase and went Blizzard Warning...technicalities aside. :lol:

I'm interested in how this plays out this evening. Looks like the strongest forcing will stay west of here though.

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It will be interesting to see what IND and IWX do this evening, if anything. While there may only be 2-3" of snow, whiteout conditions and blizzard conditions are definitely a good bet across the Northern half of Indiana.

Also anyone have any idea what is going on with some of the reporting stations in Iowa? Reporting rain and heavy rain?

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