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February 25-27 Winter Storm Part 2


Chicago Storm

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looks like I've been bumped

Tuesday Snow, mainly after 9am. High near 36. Breezy, with a east northeast wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 6 inches possible. :yikes:

Tuesday Night Snow. Low around 32. Breezy, with a north northeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

Very interesting. I think Gino made that call.

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I can guarantee you that is way overdone here, not so sure about Chicago though.  No way we get over 0.6" imo.  Local mets already going 1-3", with all of the precip being snow.

 

seems that way down here as well.   Nearly .9" after the 850's drop below zero.    The last time I followed euro short range qpf numbers was the Dec26th event and it over did those quite a bit here.

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Very interesting. I think Gino made that call.

 

Sounds like the Euro delivered

 

from earlier

 

WITH REGARD TO THE WINTER WEATHER ON TUESDAY...NO CHANGES TO

GOING HEADLINES PLANNED THIS MORNING. UNCERTAINTY REMAINS

EXCEPTIONALLY HIGH WITH REGARDS TO ACCUMULATION POTENTIAL DURING

TUESDAY. MODELS CONTINUE TO STRUGGLE WITH 2M TEMPS AND SNOW PACK

WITH INITIALIZATION OF SNOW COVER THIS MORNING SHOWING NEARLY THE

ENTIRE STATE OF INDIANA COVERED WITH SNOW ALMOST TO THE OHIO

RIVER...WHICH VISIBLE IMAGERY THIS MORNING SHOWS VERY LITTLE SNOW

REMAINING OVER EASTERN ILLINOIS SOUTH OF I-80 OR ANYWHERE BUT THE

MICHIGAN BORDER IN INDIANA. PROGGED 2M TEMPS TOMORROW SHOW A SHARP

GRADIENT RIGHT AT THE EDGE OF WHERE THE MODEL INCORRECTLY ASSUMES

THE EDGE OF THE SNOW PACK IS WHICH RAISES SERIOUS DOUBTS ABOUT HOW

COLD PROGGED 2M TEMPS ARE TOMORROW AND THE RESULTANT PRECIP TYPE

OVER OUR CWA AND ACCUMULATION POTENTIAL WHERE THAT TYPE IS SNOW.

WOULD LIKE TO GET A LOOK AT THE FULL SUITE OF 12Z MODEL DATA

INCLUDING THE ECMWF BEFORE MAKING ANY DECISIONS WITH REGARDS TO THE

WATCH HEADLINE...BUT AT THIS POINT THINKING THAT OUR CHANCES OF

REACHING WARNING CRITERIA ARE VERY LOW ACROSS MOST OF THE WATCH

AREA. CONVECTIVE POTENTIAL TOMORROW DOES EXIST AND ANY TIME YOU GET

CONVECTIVE SNOW (WITH OR WITHOUT LIGHTNING) ALL BETS ARE OFF WITH

REGARDS TO ACCUMULATION POTENTIAL...BUT WOULD SEEM MUCH MUCH MORE

LIKELY THAT THE MAJORITY OF THE WATCH AREA WILL END UP WITH LESS

THAN 3 INCHES OF ACCUMULATION DURING THE DAY TOMORROW THAN IT WILL

WITH 6 INCHES. WILL CONTINUE TO DIG INTO DATA AND WILL AIM TO HAVE

ANY CHANGES TO WSW OUT BY 2000-2030Z AND NEW AFD BY 2100Z.

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be nice if it started a little closer to sunset..  If its ripping like the euro portrays it could be then I don't think snow accumulating will be a huge problem.

 

+1. That would be a win.

 

Lake influence is definitely present here. Watching the clouds trends tonight will be critical.

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for me

 

Tuesday: Snow. High near 34. Breezy, with a east northeast wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 6 inches possible.

 

Tuesday Night: Snow likely. Cloudy, with a low around 29. North northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

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My grid forecast:

 

  • Tonight: Mostly cloudy, with a low around 27. Blustery, with a east northeast wind 5 to 10 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 25 mph.
  • Tuesday: Snow, mainly after noon. High near 34. Breezy, with a east northeast wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.
  • Tuesday Night: Snow. Low around 29. Blustery, with a north northeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
  • Wednesday: Snow likely. Cloudy, with a high near 34. North wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
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temps also trended a bit colder for YYZ, although still marginal.

 

Resembles that Dec 1992 storm, Ottawa guy pulled up. 

 

Temperatures were marginal with that storm but regions north of 401 picked up 16-20" from that monster Now i cant speak for YYZ because it only shows day 1 of that storm lool, the other day seems to be missing.....

 

I rather analyze the 0z models tonight before trying to paint a better picture and settle with a conclusion by 12z runs tomorrow. 

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My grid:
 

 

·  Tuesday: Snow, mainly after 9am. High near 36. Breezy, with a east northeast wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

·  Tuesday Night: Snow likely. Cloudy, with a low around 31. Blustery, with a north northeast wind 10 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

·  Wednesday: Snow likely. Cloudy, with a high near 35. North wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

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Call me crazy but I kinda like the 4-6" call for the Chicago area for tomorrow. Between uncertainty on precip totals and how much gets lost with melting, it seems like a reasonable compromise. Can always nudge upward if it looks as though something like the Euro is on the right track.

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If we're showing off p&c forecasts...for my hood.  :axe:

 

Tonight: A chance of snow, freezing rain, and sleet before 4am, then freezing rain and sleet likely. Mostly cloudy, with a low around 30. Blustery, with a east northeast wind 15 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New ice accumulation of less than a 0.1 of an inch possible. New snow and sleet accumulation of less than a half inch possible. 

Tuesday: Rain, freezing rain, and sleet before 7am, then rain or freezing rain between 7am and 10am, then rain after 10am. High near 36. Breezy, with a east wind 13 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New ice accumulation of less than a 0.1 of an inch possible. New sleet accumulation of less than a half inch possible. 

Tuesday Night: Rain and snow likely, becoming all snow after 1am. Cloudy, with a low around 30. East wind 5 to 10 mph becoming light and variable. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

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LOT updates te wsw to include text about uncertainty...

URGENT - WINTER WEATHER MESSAGE

NATIONAL WEATHER SERVICE CHICAGO IL

155 PM CST MON FEB 25 2013

potentially heavy snow and strong winds to affect northern il

on tuesday...

ILZ003>006-008-010>014-019>022-260400-

/O.EXT.KLOT.WS.A.0003.130226T1800Z-130227T0300Z/

WINNEBAGO-BOONE-MCHENRY-LAKE IL-OGLE-LEE-DE KALB-KANE-DUPAGE-COOK-

LA SALLE-KENDALL-GRUNDY-WILL-

INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...WOODSTOCK...

WAUKEGAN...OREGON...DIXON...DEKALB...AURORA...WHEATON...CHICAGO...

OTTAWA...OSWEGO...MORRIS...JOLIET

155 PM CST MON FEB 25 2013

Winter storm watch now in effect from tuesday afternoon

through tuesday evening...

* timing, wet snow is likely tuesday afternoon into early tuesday

evening, and snow may be heavy at times. precipitation may

start as rain or a rain, snow, sleet mix.

* snow accumulation, there is a higher than usual amount of

uncertainty with respect to snow accumulation. it appears as

though several inches of accumulation are probable, with at

least some limited threat for localized accumulations of 6 or

more inches.

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Brett Anderson on twitter says the latest euro gives Toronto 14" of snow

When you take a p-type blend from 12z RGEM...Euro...GFS...all of the GTA to Hamilton to KW stays all snow with significant totals. Will likely be a heavier(higher water content) snow than what we saw on the 8th...combined with stronger winds. Could have a more significant impact than the storm on the 8th. Only time will tell though. Curious if EC will go Winter Storm Watch at 330pm...having my doubts but they are quite good at surprising us. 

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/O.UPG.KGRR.WS.A.0003.130226T1700Z-130227T1100Z/

/O.NEW.KGRR.WW.Y.0009.130226T1800Z-130227T1100Z/

ALLEGAN-BARRY-EATON-INGHAM-VAN BUREN-KALAMAZOO-CALHOUN-JACKSON-

INCLUDING THE CITIES OF...HOLLAND...HASTINGS...CHARLOTTE...

LANSING...SOUTH HAVEN...KALAMAZOO...BATTLE CREEK...JACKSON

308 PM EST MON FEB 25 2013

...WINTER WEATHER ADVISORY IN EFFECT FROM 1 PM TUESDAY TO 6 AM

EST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A WINTER

WEATHER ADVISORY FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT FROM 1

PM TUESDAY TO 6 AM EST WEDNESDAY. THE WINTER STORM WATCH IS NO

LONGER IN EFFECT.

HAZARDOUS WEATHER...

* SNOW WILL DEVELOP TUESDAY AFTERNOON AND TUESDAY NIGHT. SLEET

COULD ACCOMPANY THE ONSET OF THE SNOWFALL ON TUESDAY.

* SNOW MAY BE BRIEFLY HEAVY WITH SNOWFALL RATES GREATER THAN AN

INCH PER HOUR AT TIMES. WINDS WILL GUST OVER 25 MPH AT TIMES.

* MOST LOCATIONS WILL LIKELY SEE 3 TO 6 INCHES OF SNOW. ISOLATED

AREAS COULD SEE GREATER THAN 6 INCHES FROM TUESDAY AFTERNOON

THROUGH TUESDAY NIGHT.

IMPACTS...

* VISIBILITIES COULD BE GREATLY REDUCED DUE TO SNOW AND BLOWING

SNOW. ROADS WILL LIKELY BECOME SLIPPERY FOR THE TUESDAY

EVENING AND WEDNESDAY MORNING COMMUTES.

* WET HEAVY SNOW COULD CAUSE ISOLATED POWER OUTAGES AND/OR TREE

BRANCHES TO BREAK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

* THE MICHIGAN DEPARTMENT OF TRANSPORTATION REMINDS MOTORISTS

TO ADJUST SPEEDS BASED ON THE CONDITIONS... AND TO TAKE IT

SLOW IN ICE AND SNOW.

* WEATHER PREPAREDNESS INFORMATION IS AVAILABLE ON LINE AT

WWW.READY.GOV/WINTER AND HTTP://GO.USA.GOV/5OG.

&&

$$

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