Chicago-O'Hare International, IL

1:32 AM CST on February 10, 2012 (GMT -0600)
Elev: 666 ft
Lon: 87.9° W
Lat: 42.0° N
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Active Advisory: Lake Effect Snow Watch (US Severe Weather)
Tropical Weather: Tropical Cyclone Giovanna (South Indian Ocean) Tropical Cyclone Jasmine (Southern Pacific)
Weather Summary
Jessica Parker
Weather Underground Forecast for Friday, February 10, 2012.

Expect active weather to move into the East on Friday, as a trough of low pressure moves from the Southern Plains and into the Eastern Valleys. Flow around this system will pull moisture and energy in from the Gulf of Mexico. This will produce scattered showers and thunderstorms over the Southern Plains and Lower Mississippi River Valley throughout the day. There is a slight chance that these storms will turn severe with strong winds and heavy downpours. The northern side of this system will push a cold front into the Midwest, which will move through the Great Lakes and into the Ohio River Valley. Expect light and scattered snow showers to develop along the front as it passes through northern Michigan and into the eastern Ohio Valley and the Central Appalachians. Warmer temperatures ahead of this system will allow for rain showers to develop in parts of the Mid-Atlantic states and the Tennessee Valley.

Out West, a weak trough of low pressure moves onshore from the Pacific Ocean, bringing some moisture onshore with it. This will produce more rain and high elevation snow showers over the Pacific Northwest. Some of this moisture will stretch southward into northern California, allowing for light rain and high elevation snow showers to spread into the northern Sierras.
Weather Underground Forecast for Friday, February 10, 2012.

Expect active weather to move into the East on Friday, as a trough of low pressure moves from the Southern Plains and into the Eastern Valleys. Flow around this system will pull moisture and energy in from the Gulf of Mexico. This will produce scattered showers and thunderstorms over the Southern Plains and Lower Mississippi River Valley throughout the day. There is a slight chance that these storms will turn severe with strong winds and heavy downpours. The northern side of this system will push a cold front into the Midwest, which will move through the Great Lakes and into the Ohio River Valley. Expect light and scattered snow showers to develop along the front as it passes through northern Michigan and into the eastern Ohio Valley and the Central Appalachians. Warmer temperatures ahead of this system will allow for rain showers to develop in parts of the Mid-Atlantic states and the Tennessee Valley.

Out West, a weak trough of low pressure moves onshore from the Pacific Ocean, bringing some moisture onshore with it. This will produce more rain and high elevation snow showers over the Pacific Northwest. Some of this moisture will stretch southward into northern California, allowing for light rain and high elevation snow showers to spread into the northern Sierras.
Weather Underground Broadcast Network
Chicago-O'Hare International Weather at a Glance
Updated 12:51 AM CST
Weather Station
Chicago (KORD)
Elevation
666 ft
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Now
Overcast
Overcast
Temperature
32 °F
Feels Like 22 °F
Wind(mph)
13
Sunrise / Set
6:54 AM
5:17 PM
Moon
Waning Gibbous
Tonight
Partly Cloudy 29 °F
Partly Cloudy
Friday
Chance of Snow 31 °F
Chance of Snow
40% chance of precipitation
Friday Night
Chance of Snow 13 °F
Chance of Snow
40% chance of precipitation
Saturday
Partly Cloudy 25 | 13 °F
Partly Cloudy
Sunday
Clear 29 | 18 °F
Clear
Monday
Chance of Snow 31 | 27 °F
Chance of Snow
30% chance of precipitation
Today is forecast to be Cooler than yesterday.
Conditions
Pressure
30.07 in
Visibility
10.0 miles
Clouds
Overcast 2800 ft
Moisture
Humidity
69%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KORD 100651Z 24011KT 10SM OVC028 00/M05 A3005 RMK AO2 SLP181 T00001050
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Windchill
22 °F
Dew Point
23 °F
Wind
Speed / Dir
13 mph from WSW
Wind Gust
Health
UV
0 out of 16
Pollen
.10 out of 12
Pollen Forecast
Ozone
Good
PM2.5
Good
Flu Activity
Sporadic
View Flu Map
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Regional Forecast for Cook
Friday
chancesnow Cloudy with a chance of snow showers in the morning...then accumulating lake effect snow near the lake and south in the afternoon...with a chance of more light snow showers elsewhere. Blustery. Morning highs in the lower 30s. Northwest winds 10 to 15 mph with gusts up to 30 mph...becoming north 15 to 25 mph with gusts up to 30 mph during the afternoon. Chance of snow from 40 percent inland to 90 percent near the Lakeshore and south.
Friday Night
nt_chancesnow Cloudy with a chance of snow showers inland...accumulating lake effect snow near the lake and south. Snow may be locally heavy. Blustery. Lows 12 to 16...except around 20 downtown. North winds 15 to 25 mph with some gusts to 30 mph....decreasing to 10 to 15 mph overnight. Chance of snow from 50 percent inland to near 100 percent near the Lakeshore and south.
Saturday
chancesnow Snow showers likely near the state line and a chance of snow showers inland early in the morning...otherwise partly cloudy. Highs in the mid 20s. Northwest winds 10 to 15 mph with gusts to 30 mph at times. Chance of snow from 30 percent inland to 70 percent near the state line
Saturday Night
nt_sunny Mostly clear. Lows 12 to 16...except 16 to 20 downtown. West winds 10 to 15 mph with gusts up to 30 mph at times.
Sunday
sunny Sunny. Highs around 30.
Sunday Night
nt_sunny Mostly clear. Lows around 20.
Monday
snow Mostly cloudy with a 30 percent chance of light snow. Highs in the lower 30s.
Monday Night
nt_snow Cloudy with a 50 percent chance of light snow. Lows in the upper 20s.
Tuesday
chancesnow Cloudy with a 20 percent chance of snow showers. Highs in the mid 30s.
Tuesday Night and Wednesday
nt_cloudy Mostly cloudy. Lows around 30. Highs around 40.
Wednesday Night
nt_snow Mostly cloudy with a 30 percent chance of light rain or snow. Lows in the lower 30s.
Thursday
chancesnow Cloudy with a 50 percent chance of snow possibly mixed with rain. Highs in the lower 40s.
Source: NWS at 9:18 PM CST on February 9, 2012
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Nowcast
Lake effect snow watch in effect from Friday afternoon through Saturday afternoon...
Displaying 0–0 of 37 Stations ► ◄
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Forecast
View Calendar 7-Day Weather Forecast for 60666
Friday, 10
Chance of Snow
31 | 13 °F
Chance of Snow
Chance of
Precipitation
40%
Saturday, 11
Partly Cloudy
25 | 13 °F
Partly Cloudy
Chance of
Precipitation
10%
Sunday, 12
Clear
29 | 18 °F
Clear
Chance of
Precipitation
0%
Monday, 13
Chance of Snow
31 | 27 °F
Chance of Snow
Chance of
Precipitation
30%
Tuesday, 14
Chance of Snow
34 | 29 °F
Chance of Snow
Chance of
Precipitation
20%
Wednesday, 15
Partly Cloudy
40 | 31 °F
Partly Cloudy
Chance of
Precipitation
10%
Thursday, 16
Chance of Snow
40 | NA
Chance of Snow
Chance of
Precipitation
50%
Source: NWS at 9:18 PM CST on February 9, 2012
Regional Forecast for Cook
Overnight
nt_cloudy Mostly cloudy. Temperatures nearly steady around 30. Southwest winds 10 to 15 mph.
Friday
chancesnow Cloudy with a chance of snow showers in the morning...then accumulating lake effect snow near the lake and south in the afternoon...with a chance of more light snow showers elsewhere. Blustery. Morning highs in the lower 30s. Northwest winds 10 to 15 mph with gusts up to 30 mph...becoming north 15 to 25 mph with gusts up to 30 mph during the afternoon. Chance of snow from 40 percent inland to 90 percent near the Lakeshore and south.
Friday Night
nt_chancesnow Cloudy with a chance of snow showers inland...accumulating lake effect snow near the lake and south. Snow may be locally heavy. Blustery. Lows 12 to 16...except around 20 downtown. North winds 15 to 25 mph with some gusts to 30 mph....decreasing to 10 to 15 mph overnight. Chance of snow from 50 percent inland to near 100 percent near the Lakeshore and south.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 29 | 22 29 | 20 25 | 13 18 | 7
Wind 8 mph WSW 9 mph NNW 16 mph North 12 mph North
Humidity 77% 71% 59% 61%
Chance of Precip. 10% 40% 40% 50%
Cloud Cover 54% 100% 95% 85%
Conditions Chance of Snow Chance of Snow Chance of Snow Chance of Snow
Sunrise & Sunset
6:54 AM
5:17 PM
Source: NWS at 9:18 PM CST on February 9, 2012
Regional Forecast for Cook
Saturday
chancesnow Snow showers likely near the state line and a chance of snow showers inland early in the morning...otherwise partly cloudy. Highs in the mid 20s. Northwest winds 10 to 15 mph with gusts to 30 mph at times. Chance of snow from 30 percent inland to 70 percent near the state line
Saturday Night
nt_sunny Mostly clear. Lows 12 to 16...except 16 to 20 downtown. West winds 10 to 15 mph with gusts up to 30 mph at times.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 13 | 7 22 | 4 20 | 2 16 | 2
Wind 12 mph NNW 11 mph NW 13 mph WNW 12 mph WNW
Humidity 73% 47% 47% 51%
Chance of Precip. 50% 10% 10% 0%
Cloud Cover 64% 41% 30% 18%
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Clear
Sunrise & Sunset
6:53 AM
5:18 PM
Source: NWS at 9:18 PM CST on February 9, 2012
Regional Forecast for Cook
Sunday
sunny Sunny. Highs around 30.
Sunday Night
nt_sunny Mostly clear. Lows around 20.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 13 | 2 27 | 4 23 | 7 20 | 7
Wind 11 mph WNW 11 mph West 8 mph West 6 mph WSW
Humidity 60% 38% 47% 54%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 16% 13% 5% 11%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
6:52 AM
5:20 PM
Source: NWS at 9:18 PM CST on February 9, 2012
Regional Forecast for Cook
Monday
snow Mostly cloudy with a 30 percent chance of light snow. Highs in the lower 30s.
Monday Night
nt_snow Cloudy with a 50 percent chance of light snow. Lows in the upper 20s.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 18 | 9 31 | 16 29 | 20 27 | 22
Wind 6 mph SW 9 mph SSW 8 mph South 8 mph SSW
Humidity 69% 53% 66% 78%
Chance of Precip. 0% 30% 30% 50%
Cloud Cover 53% 91% 98% 100%
Conditions Chance of Snow Chance of Snow Chance of Snow Chance of Snow
Sunrise & Sunset
6:50 AM
5:21 PM
Source: NWS at 9:18 PM CST on February 9, 2012
Regional Forecast for Cook
Tuesday
chancesnow Cloudy with a 20 percent chance of snow showers. Highs in the mid 30s.
Tuesday Night and Wednesday
nt_cloudy Mostly cloudy. Lows around 30. Highs around 40.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 27 | 25 34 | 25 32 | 25 31 | 25
Wind 6 mph SW 7 mph WSW 6 mph WSW 5 mph WSW
Humidity 88% 72% 75% 81%
Chance of Precip. 50% 20% 20% 10%
Cloud Cover 100% 96% 84% 57%
Conditions Chance of Snow Chance of Snow Mostly Cloudy Partly Cloudy
Sunrise & Sunset
6:49 AM
5:22 PM
Source: NWS at 9:18 PM CST on February 9, 2012
Regional Forecast for Cook
Tuesday Night and Wednesday
nt_cloudy Mostly cloudy. Lows around 30. Highs around 40.
Wednesday Night
nt_snow Mostly cloudy with a 30 percent chance of light rain or snow. Lows in the lower 30s.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 29 | 25 38 | 29 38 | 31 34 | 29
Wind 4 mph SW 4 mph SSW 2 mph South 5 mph South
Humidity 85% 72% 76% 85%
Chance of Precip. 10% 10% 10% 30%
Cloud Cover 69% 54% 69% 80%
Conditions Partly Cloudy Partly Cloudy Chance of Snow Chance of Snow
Sunrise & Sunset
6:49 AM
5:22 PM
Source: NWS at 9:18 PM CST on February 9, 2012
Regional Forecast for Cook
Thursday
chancesnow Cloudy with a 50 percent chance of snow possibly mixed with rain. Highs in the lower 40s.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 31 | 29 38 | 34 38 | 31 34 | 29
Wind 4 mph South 5 mph SW 2 mph South 5 mph South
Humidity 92% 82% 76% 85%
Chance of Precip. 30% 50% 10% 30%
Cloud Cover 89% 91% 69% 80%
Conditions Chance of Snow Chance of Snow Chance of Snow Chance of Snow
Sunrise & Sunset
6:49 AM
5:22 PM
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Scientific Forecaster Discussion — MOS Weather Graph
Nearby
History & Almanac
February 10, 2012 Max Temp Min Temp
Normal 33 °F 18 °F
Record 63 °F (1876) -18 °F (1899)
Yesterday 36 °F 21 °F
Yesterday's Heating Degree Days: 36
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Earthquake Activity
City Distance Mag. Time & Date
No recent earthquake activity has been reported nearby.
Minimum magnitude displayed is 2.5.
More information at USGS.gov
Air Quality
  Air Quality AQ Index Pollutant
Yesterday Good
PM2.5
Yesterday Good
OZONE
Current Good
PM2.5
Current Good
OZONE
Friday Good
PM2.5
Coastal Water Temperatures
Place Temperature
No Stations Reporting
Marine Forecast
Astronomy
Feb. 10, 2012 Rise Set
Actual Time 6:54 AM CST 5:17 PM CST
Civil Twilight 6:25 AM CST 5:46 PM CST
Nautical Twilight 5:52 AM CST 6:19 PM CST
Astronomical Twilight 5:20 AM CST 6:52 PM CST
Moon 9:00 PM CST 7:58 AM CST
Length Of Visible Light 11h 20m
Length of Day
10h 22m
Tomorrow will be 2m 32s longer.
Waning Gibbous, 93% of the Moon is Illuminated
Today
Waning Gibbous
Feb 14
Last Quarter
Feb 21
New
Feb 29
First Quarter
Mar 8
Full
Visit Astronomy
Today's Extremes
State Highs State Lows
37 °F
Cairo
36 °F
Metropolis
36 °F
Jacksonville
35 °F
Harrisburg
35 °F
Peru
29 °F
Freeport
30 °F
Rochelle
30 °F
Chicago DuPage
30 °F
Aurora
30 °F
Morris
Source: NWS
Snow Depth
Station Depth Elevation
No new snow has been reported.
Snow Depth Reports — Snow Depth Map
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Aviation
City Temp. Conditions Updated
Chicago 32 °F Overcast 12:51 AM CST
Chicago Executive 33 °F Overcast 12:52 AM CST
Chicago Midway 32 °F Overcast 12:51 AM CST
Chicago DuPage 31 °F Overcast 12:52 AM CST
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Flight To ETA Status
SIA7893
Los Angeles, CA 		KORD 01:20AM On Time
NKS331
New York, NY 		KORD 01:24AM On Time
SQC7893
Los Angeles, CA 		KORD 01:25AM On Time
KAL261
Atlanta, GA 		KORD 02:09AM En Route / Delayed
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Type Condition
Flight Rule: MVFR (KORD)
Wind Speed: 11.0 kts.
Wind Dir: 240° (WSW)
Ceiling: 2800 ft

METAR KORD 100651Z 24011KT 10SM OVC028 00/M05 A3005 RMK AO2 SLP181 T00001050

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Nearby Events
Event Date Forecast
Retired Eagles Activity Club 1:00 PM CST 2012-02-10 Chance of Snow, 30°F
Elmhurst AARP Chapter 1007 12:00 PM CST 2012-02-10 Chance of Snow, 32°F
Al-Anon 7:00 PM CST 2012-02-10 Chance of Snow, 24°F
Advance Auto Parts Monster Jam 7:00 PM CST 2012-02-10 Chance of Snow, 24°F
Gypsy 8:00 PM CST 2012-02-10 Chance of Snow, 22°F
List of Strangers / Downfall of Society 8:00 PM CST 2012-02-10 Chance of Snow, 22°F
Event data courtesy eviesays.com
Sports
Event Date Forecast
Budweiser Shootout 8:29 PM EST on February 18, 2012 Average High 71° F/ 21° C
Gatorade Duel 1 2:19 PM EST on February 23, 2012 Average High 70° F/ 21° C
GEICO 400 1:16 PM CDT on September 16, 2012 Average High 74° F/ 23° C
Event Date Forecast
AT&T Pebble Beach National Pro-Am 8:30 AM PST on February 10, 2012 Partly Cloudy, 45 °F
AT&T Pebble Beach National Pro-Am 8:30 AM PST on February 11, 2012 Chance of Rain, 45 °F
View all Sports Weather
Weather Stations
Station Location Temp. Windchill Dew Point Humidity Wind Precipitation Elevation Updated Type Website
Leyden Township, Melrose Park, IL 31.8 °F 29 °F 15 °F 49% SW  at  3.1 mph 0.00 in / hr 684 ft 1:31 AM CST Rapid Fire  
APRSWXNET Norridge IL , Chicago, IL 32 °F 32 °F 26 °F 79% SW  at  0 mph 0.00 in / hr 656 ft 1:02 AM CST MADIS
Dempster and Rt. 83, Des Plaines, IL 30.9 °F 22 °F 25 °F 78% SW  at  11.2 mph 0.00 in / hr 660 ft 1:32 AM CST Rapid Fire
Irving Park Rd & Pacific Ave, Chicago, IL 32.5 °F 27 °F 26 °F 77% SW  at  5.9 mph 0.00 in / hr 635 ft 1:32 AM CST Rapid Fire
Historic East Side, Harwood Heights, IL 31.8 °F 28 °F 24 °F 71% WSW  at  4.0 mph 0.00 in / hr 635 ft 1:29 AM CST Normal
Busse Woods, Elk Grove Village, IL 31.6 °F 32 °F 24 °F 72% NE  at  0.0 mph 0.00 in / hr 720 ft 1:32 AM CST Rapid Fire
E Crescent and S Poplar, Elmhurst, IL 31.7 °F 28 °F 26 °F 80% SW  at  4.0 mph - / hr 685 ft 1:27 AM CST Normal  
SCARSDALE, Arlington Heights, IL 31.8 °F 32 °F 23 °F 70% NW  at  0.0 mph 0.00 in / hr 682 ft 1:32 AM CST Rapid Fire  
Gladstone Park Area, Westchester, IL 31.5 °F 32 °F 23 °F 71% WSW  at  3.0 mph 0.00 in / hr 640 ft 1:18 AM CST Normal  
PIONEER PARK, Arlington Heights, IL 30.7 °F 31 °F 23 °F 72% WNW  at  0.0 mph 0.00 in / hr 690 ft 1:32 AM CST Rapid Fire  
Madison Meadow, Lombard, IL 32.5 °F 32 °F 12 °F 43% SW  at  1.9 mph 0.00 in / hr 728 ft 1:32 AM CST Normal  
APRSWXNET Glenview IL , Golf, IL 32 °F 32 °F 25 °F 74% West  at  2 mph 0.00 in / hr 659 ft 1:03 AM CST MADIS
Arlington Heights Historical District, Arlington Heights, IL 31.3 °F 31 °F 20 °F 64% South  at  2.2 mph 0.00 in / hr 650 ft 1:32 AM CST Rapid Fire  
Mr. Hammes's Weather, Westchester, IL 31.5 °F 28 °F 23 °F 71% WSW  at  3.5 mph 0.00 in / hr 641 ft 1:32 AM CST Rapid Fire  
Irving Park, Chicago, IL 32.4 °F 32 °F 26 °F 76% West  at  3.0 mph 0.00 in / hr 600 ft 1:32 AM CST Rapid Fire  
Lincolnwood, Lincolnwood, IL 32.2 °F 26 °F 22 °F 67% WSW  at  6.0 mph 0.00 in / hr 0 ft 1:32 AM CST Normal  
Oak Park, IL, Oak Park, IL 32.1 °F 32 °F 24 °F 71% SE  at  0.0 mph 0.00 in / hr 617 ft 1:32 AM CST Rapid Fire
Lombard (East of Sunset Knoll), Lombard, IL 30.7 °F 27 °F 21 °F 66% SW  at  3.8 mph 0.00 in / hr 728 ft 1:32 AM CST Rapid Fire
Near North Ave. and Main St. Glen Ellyn, Glen Ellyn, IL 32.5 °F 32 °F 20 °F 60% SW  at  2.2 mph 0.00 in / hr 755 ft 1:32 AM CST Rapid Fire
Fairfield Townhome Assoc, Lombard, IL 30.9 °F 27 °F 26 °F 81% SW  at  4.0 mph 0.00 in / hr 725 ft 1:32 AM CST Normal  
North Park University, Chicago, IL 33.5 °F 28 °F 22 °F 62% WSW  at  6.0 mph 0.00 in / hr 617 ft 1:30 AM CST Normal
Schaumburg North, Schaumburg, IL 32.0 °F 32 °F 25 °F 74% South  at  0.7 mph 0.00 in / hr 738 ft 1:30 AM CST Normal
APRSWXNET Roselle IL , Bloomingdale, IL 32 °F 32 °F 25 °F 76% NW  at  3 mph 0.00 in / hr 666 ft 10:30 PM CST MADIS
The Doghouse, Roselle, IL 31.8 °F 27 °F 25 °F 76% NNW  at  5.0 mph 0.00 in / hr 666 ft 10:32 PM CST Rapid Fire  
KC9HZC, Brookfield, IL 32.5 °F 32 °F 26 °F 76% West  at  2.2 mph 0.00 in / hr 617 ft 1:32 AM CST Rapid Fire  
Peterson Woods, Chicago, IL 34.6 °F 35 °F 25 °F 69% SW  at  1.4 mph 0.00 in / hr 614 ft 1:28 AM CST Normal  
Palatine, South, Palatine, IL 32.0 °F 32 °F 27 °F 81% West  at  0.0 mph - / hr 741 ft 1:19 AM CST Normal  
Schaumburg Outdoors, Schaumburg, IL 30.5 °F 24 °F 26 °F 82% SW  at  6.0 mph 0.00 in / hr 814 ft 1:32 AM CST Rapid Fire
West Rogers Park, Chicago, IL 32.3 °F 26 °F 25 °F 75% East  at  7.5 mph 0.02 in / hr 595 ft 1:32 AM CST Rapid Fire
Brookfield, IL 32.3 °F 32 °F 26 °F 78% SW  at  2.0 mph 0.00 in / hr 659 ft 1:25 AM CST Normal
APRSWXNET Berwyn IL , Berwyn, IL - - - - WSW  at  7 mph 0.00 in / hr 620 ft 1:02 AM CST MADIS
Evanston KU9Z.Net, Evanston, IL 33.1 °F 33 °F 23 °F 67% North  at  0.0 mph 0.00 in / hr 600 ft 1:32 AM CST Rapid Fire
Winston Park Subdivision, Palatine, IL 30.7 °F 26 °F 25 °F 80% West  at  5.0 mph 0.00 in / hr 755 ft 1:32 AM CST Rapid Fire  
Lincoln Square, CHICAGO, IL 33.1 °F 33 °F 14 °F 45% West  at  3.0 mph 0.00 in / hr 604 ft 1:32 AM CST Rapid Fire  
APRSWXNET Wheaton IL , Glen Ellyn, IL 31 °F 31 °F 23 °F 72% West  at  0 mph 0.00 in / hr 790 ft 1:03 AM CST MADIS
HADS DES PLAINES RIVER AT RIVERSIDE IL, Lyons, IL - - - - North  at  - 0.00 in / hr 595 ft 12:45 AM CST MADIS
APRSWXNET Northbrook IL US, Glencoe, IL 34 °F 34 °F 25 °F 70% WSW  at  0 mph 0.00 in / hr 640 ft 12:54 AM CST MADIS
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Lake Effect Snow Watch
Mobile & Email Alerts Statement as of 9:09 PM CST on February 09, 2012

... Lake effect snow watch remains in effect from Friday afternoon
through Saturday afternoon...

* timing... lake effect snow is expected to develop Friday
afternoon and continue through Friday night and Saturday morning
before shifting east of the watch area by mid afternoon
Saturday. North to northeast winds will initially focus the most
numerous snow showers along the Illinois shore Friday
afternoon... with the focus then expected to shift more into lake
and Porter counties in Northwest Indiana overnight Friday night.
Winds will eventually back to the northwest on Saturday...
allowing the bands of lake effect snow to move east of Porter
County in the early afternoon. The period of heaviest lake
effect snow and fastest accumulation will occur from late Friday
afternoon into the predawn hours of Saturday.

* Snow accumulations... while lake effect snow can be highly
localized... current forecasts are for total accumulations from 3
to 5 inches in far northeast Cook County... 4 to 7 inches across
downtown Chicago and the south suburbs... with 5 to 8 inches from
the far southeast side of Chicago east across central and
Northern Lake and Porter counties of Northwest Indiana. Isolated
higher amounts are possible if the heaviest snow bands can
become stationary for an extended period of time.

* Other impacts... slippery snow covered roads... intense snowfall
leading to rapid snow accumulation and severely reduced
visibility... blowing and drifting snow... and single digit wind
chills.

Precautionary/preparedness actions...

A lake effect snow watch means there is a potential for a large
amount of snow in only a few hours. Visibilities and depth of
snow can vary greatly... impacting travel significantly. Continue
to monitor the latest forecasts.