Moderate to heavy snow reported in Valparaiso, IN

Waves of lake effect snow continue to push off of Lake Michigan and into portions of northwest Indiana this afternoon. 

One of the harder hit areas has been Porter County, where the visibility at the Valparaiso Airport has dropped to 1/4 of a mile at times this afternoon in heavy snow squalls.  

One inch of snow fell in Portage, Indiana between 11:30AM and 1:00PM.

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The view from or WeatherBug camera in La Porte, Indiana.  At 2:45PM, the heaviest snow squalls were occuring west of La Porte, in Porter County. 

1PM Update: Heavy snow squalls expected this evening east of I-294

Much of the Chicago area remains fairly snowfall-free at 1PM, but that is expected to change rather rapidly by this evening across Lake and Cook counties.  

High resolution, short range computer model guidance strongly suggests that lake effect snow bands start aiming for Chicago again between 2PM and 5PM, with the potential for heavy snow squalls between 4PM and Midnight.   The majority of the heavier snowfall should be confined to those communities in Lake(IL) and Cook Counties, east of the Tri-State Tollway or I-294.   Areas west of I-294 are still expected to see off and on snow showers, but the frequency and intensity of ths snow squalls will not be as high as those closer to the lakeshore.   

With the heaviest snow over the next 12 hours expected to occur in northeast Illinois and far northwest Indiana, some of the warnings and advisories for Indiana and Michigan have changed.  See Snow warnings canceled…  for details 

 

Here is a breakdown of how much snow you can anticipate, including the latest warnings and advisories. 

Lake Effect Snow Advisory for Cook County and the City of Chicago.  Communities east of the Tri-State Tollway (I-294), including the downtown Chicago, can expect 3″ to 5″ with isolated totals of up to 6″.     West of I-294 (in Cook County), 1″ to 3″ of snow.  The majority of the snow in northeast Illinois will occur between 4PM and 2AM.   

Lake Effect Snow Warning for Lake(IN) and Porter(IN) Counties from Noon Today until Noon Thursday.  Total accumulation of 4″ to 12″ by Noon Thursday.  The warning for Berrian County was canceled at 11:30AM.  The warning for La Porte county has been downgraded to an advisory at 11:30AM.   

Lake Effect Snow Advisory for Jasper and La Porte Counties in Northern Indiana.  Total accumulation of 3″ to 7″ by Noon Thursday.  The advisory for Pulaski County was cancelled at 11:30AM

1″ to 3″ of Snow (but no advisory) for sections of Lake County and Will County in Ilinois.  In Lake County, the heaviest accumulation will occur east of the Tri-State Tollway (I-294).  In Will County, the heaviest accumulation is expected east of I-57, or over the eastern half of the County.

 WGN Weather Center 7 Day Forecast

MAP LEGEND:

White:   Winter Weather Advisory/Lake Effect Snow Advisory

Yellow:  Winter Storm Watch

Red:      Winter Storm Warning/Lake Effect Snow Warning

 

Snow warnings canceled for Berrian and La Porte Counties

The National Weather Service out of northern Indiana has canceled a portion of the Lake Effect Snow Warning. 

The snow warning has been canceled for Berrien County in Michigan.

The snow warning has been replaced with a Lake Effect Snow Advisory for La Porte County in Indiana. 

The latest computer model trends suggest that over the next 12 hours, the heaviest lake effect snow is expected to occur over northeast Illinois (including Chicago) and far northwest Indiana (Gary, Valparaiso).  The heavier snow bands will eventually take aim on Berrian and La Porte counties again, but not until sometime Thursday morning.  

 

 

Lull temporary; Heavy snow squalls expected to develop by evening

At 11:30AM, the snow has ended or tapered to flurries across a large part of Chicagoland with the exception of northwest Indiana.  Radar at this hour indicates light to moderate intensity snow showers moving off Lake Michigan and into Porter and Lake counties in Indiana.

To the north of Chicago, moderate to heavy snow showers were occurring over eastern Wisconsin. 

Atmospheric conditions become much more favorable for lake effect snow in northeast Illinois between 1PM and 4PM, and heavy snow showers are likely after 4PM.   Late afternoon and evening snow squalls may limit visibility to 1/4 of a mile or less at times. 

 

Map Below:  Winds which are northwest at 11:30AM will shift to the north-northeast, and off Lake Michigan by 6PM

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Snow Advisory issued for Cook County

At 10:02AM, The National Weather Service issued a Lake Effect Snow Advisory for Cook County, including the City of Chicago.   This advisory runs from 10AM today until Noon Thursday.   

Communities in Cook County east of the Tri-State Tollway can expect 3 to 5 inches of accumulation.  West of I-294, further away from Lake Michigan, 1 to 3 inches of snow is likely. 

10AM Update: Lake effect snow to re-intensify this afternoon

Much of the Chicago area is experiencing a bit of a lull in the snowfall at 9:30AM.  However, the latest computer model guidance indicates that heavier snow squalls will return this afternoon, especially to areas east of the Tri-State Tollway (I-294). 

Winds at 2000 to 5000 feet, which help draw moisture from Lake Michigan, are forecast to strengthen from 15mph at 9AM, to 40mph by 6PM this evening.  As winds increase aloft, snow squall intensity and coverage should also escalate. 

 

Here is a breakdown of how much snow you can anticipate, including the latest warnings and advisories. 

Lake Effect Snow Advisory for Cook County and the City of Chicago.  Communities east of the Tri-State Tollway (I-294), including the downtown Chicago, can expect 3″ to 5″.  West of I-294 (in Cook County), 1″ to 3″ of snow. 

Lake Effect Snow Warning for Lake(IN), Porter(IN), LaPorte(IN) and Berrien(MI) Counties from Noon Today until Noon Thursday.  Total accumulation of 4″ to 12″ by Noon Thursday. 

Lake Effect Snow Advisory for Jasper and Pulaski Counties in Northern Indiana.  Total accumulation of 2″ to 6″ by Noon Thursday

1″ to 3″ of Snow (but no advisory) for sections of Lake County and Will County in Ilinois.  In Lake County, the heaviest accumulation will occur east of the Tri-State Tollway (I-294).  In Will County, the heaviest accumulation is expected east of I-57, or over the eastern half of the County.

WGN Weather Center 7 Day Forecast 

MAP LEGEND:

White:   Winter Weather Advisory/Lake Effect Snow Advisory

Yellow:  Winter Storm Watch

Red:      Winter Storm Warning/Lake Effect Snow Warning