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Lake Effect Snow


Jim Martin

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Hello, all. Went from Elkhart to visit relatives in Highland Thurs.-Sat. instead of my original plan from Sun. afternoon to Tues a.m. when I got the original heads up on the possible LES event. Don't want to drive back here in a foot of snow and 40 mph gusts. Anyway, current thinking in Michiana is that Monday night delta T's will approach 30 C and there will be multiple bands producing anywhere from 8-14 inches and possibly more. Would be first significant LES event for my area this season. Now I can stay put the next few days and enjoy watching this event unfold.

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That is the most aggressive run I've seen for NE Ohio. Looks like everyone around Cleveland has at least 8" on the ground, with a 2' blob over eastern Cuyahoga County and a 3' blob over Ashtabula County.

His scale is in millimeters for QPF, centimeters for snow depth...not inches. ;)

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NAM is actually showing decent potential for LES even here in NWOH... with a WNW wind, it shows a steady (albeit weak) band from SW MI to NWOH for several hours. QPF output is only around .15-.2" or so, but combined by the winds and cold it would actually feel like winter for a day or so.

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NWS in Cleveland:

URGENT - WINTER WEATHER MESSAGE

NATIONAL WEATHER SERVICE CLEVELAND OH

315 AM EST SUN JAN 1 2012

...FIRST MAJOR LAKE EFFECT SNOW OF THE SEASON ON THE WAY...

OHZ012>014-089-PAZ001>003-011615-

/O.UPG.KCLE.LE.A.0003.120102T0000Z-120103T2100Z/

/O.NEW.KCLE.LE.W.0001.120102T0000Z-120103T2100Z/

LAKE-GEAUGA-ASHTABULA INLAND-ASHTABULA LAKESHORE-NORTHERN ERIE-

SOUTHERN ERIE-CRAWFORD PA-

INCLUDING THE CITIES OF...MENTOR...CHARDON...JEFFERSON...

ASHTABULA...ERIE...EDINBORO...MEADVILLE

315 AM EST SUN JAN 1 2012

...LAKE EFFECT SNOW WARNING IN EFFECT FROM 7 PM THIS EVENING TO

4 PM EST TUESDAY...

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A LAKE

EFFECT SNOW WARNING...WHICH IS IN EFFECT FROM 7 PM THIS EVENING

TO 4 PM EST TUESDAY. THE LAKE EFFECT SNOW WATCH IS NO LONGER IN

EFFECT.

* ACCUMULATIONS...MUCH OF THE SNOWBELT SHOULD SEE AT LEAST 10

INCHES OF TOTAL ACCUMULATION WITH LOCAL AREAS UP TO 2 FEET.

* TIMING...SNOW WILL BEGIN TONIGHT NEAR THE LAKE AND INTENSIFY AS

IT SPREADS INLAND INTO MONDAY. SNOW WILL TAPER OFF BY TUESDAY

AFTERNOON.

* WINDS...WEST 25 TO 35 MPH WITH GUSTS UP TO 50 MPH SHIFTING TO

NORTHWEST.

* IMPACTS...SNOW COVERED ROADS WITH CONSIDERABLE BLOWING AND

DRIFTING OF THE SNOW WILL MAKE DRIVING HAZARDOUS.

* TEMPERATURES...TEMPERATURES WILL FALL INTO THE 20S TONIGHT THEN

HOLD NEARLY STEADY MONDAY BEFORE DROPPING INTO THE TEENS MONDAY

NIGHT. WIND CHILL READINGS WILL DROP INTO THE TEENS BY DAYBREAK

MONDAY AND DOWN TO ZERO TO 5 BELOW BY LATE MONDAY NIGHT.

* VISIBILITIES...MAY BE REDUCED TO NEAR ZERO AT TIMES IN HEAVIER

SNOW SQUALLS LEADING TO NEAR BLIZZARD CONDITIONS.

NWS Northern Indiana:

MIZ077-078-011800-

/O.UPG.KIWX.WS.A.0005.120102T0600Z-120103T1200Z/

/O.NEW.KIWX.WS.W.0001.120102T0000Z-120103T1200Z/

BERRIEN-CASS MI-

INCLUDING THE CITIES OF...NILES...BENTON HARBOR...ST. JOSEPH...

BUCHANAN...DOWAGIAC...CASSOPOLIS...MARCELLUS

446 AM EST SUN JAN 1 2012

...WINTER STORM WARNING IN EFFECT FROM 7 PM THIS EVENING TO 7 AM

EST TUESDAY...

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

WINTER STORM WARNING FOR LAKE EFFECT SNOW AND BLOWING SNOW...WHICH

IS IN EFFECT FROM 7 PM THIS EVENING TO 7 AM EST TUESDAY. THIS

REPLACES THE WINTER STORM WATCH.

HAZARDOUS WEATHER...

* LAKE EFFECT SNOW WILL DEVELOP THIS EVENING AND BECOME HEAVY AT

TIMES LATE TONIGHT AND MONDAY.

* ACCUMULATIONS OF 6 TO 12 INCHES ARE EXPECTED BY TUESDAY

MORNING...WITH THE HIGHEST AMOUNTS OVER EXTREME EASTERN BERRIEN

AND WESTERN CASS COUNTIES. MUCH LESSER AMOUNTS CAN BE EXPECTED

CLOSER TO LAKE MICHIGAN.

* STRONG NORTHWEST WINDS OF 25 TO 40 MPH WITH HIGHER GUSTS WILL

CREATE AREAS OF BLOWING AND DRIFTING SNOW.

IMPACTS...

* SOME ROADS MAY BECOME IMPASSABLE...ESPECIALLY SECONDARY AND

COUNTY ROADS DUE TO HEAVY SNOWFALL AND DRIFTING SNOW.

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It'll be interesting to see if Markham (just north of Toronto) gets hit by any lake effect squalls tonight and tomorrow. The winds might be strong enough to allow for it. I'm off to Orangeville for a new years gathering this afternoon, right in the Ontario snow belt. Should be interesting to see if they get any snow.

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It'll be interesting to see if Markham (just north of Toronto) gets hit by any lake effect squalls tonight and tomorrow. The winds might be strong enough to allow for it. I'm off to Orangeville for a new years gathering this afternoon, right in the Ontario snow belt. Should be interesting to see if they get any snow.

Winds tonight and early tomorrow will be WSW/W. That doesn't favour anything off Georgian Bay into the GTA. Later tomorrow into tomorrow night will be somewhat better for us. I doubt we see anything like we saw in December 2010 though.

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Well, my first snow that doesn't melt within a few hours might be in the making. Unfortunately the inch or so we get will be blown around into 3 inch drifts on the side of the driveway. Woohoo.

I think the wind is supposed to die down before the snow showers arrive.

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