Wind Advisory Monday from 2AM to 12PM, West Winds 45 to 50 MPH Expected

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LOW TEMPERATURE OF 10°F COMING 5AM TUESDAY

High winds from the west are forecast tonight with winds over 40 MPH just after 2:00 a.m. Monday and peaking to 45 MPH or higher between 6:00 a.m. and 9:00 a.m. Wind gusts will slowly taper to 32 MPH by 4:00 p.m., 25 MPH by 7:00 p.m. and 15 MPH by midnight Monday/Tuesday. The high temperature of 30°F Monday will begin to drop after 1:00 p.m., cooling to 14°F with a Wind Chill of 0°F by midnight Monday/Tuesday.




Early this evening temperatures have risen south of I-80 into the mid-50s while areas north of I-88 in northern Illinois are in the low 40s and upper 30s. Champaign is reporting 55°F and New Lenox and Mokena are reporting 50°F. Harvard is reporting 39°F and Winthrop Harbor and Kenosha are reporting 41°F.

However, a cold front with westerly winds with increased velocity will arrive overnight within the cold advection and robust pressure gradient between the deepening low and an incoming Canadian high pressure around 1035 mb. The steepened low-level lapse rates and unidirectional boundary layer flow look to support decent momentum transfer to at least 2,000 ft where there is 45 to 50 mph flow, despite the time of the day. The overnight hours may keep gusts a little down from peak gust potential, but in the morning hours the cold conveyor belt is potent enough that the 45 mph gusts should at least occasionally materialize. There is a consistent signal of stratocumulus wrapping around in the morning but this looks fairly thin and should not retard much of the momentum transfer. With the cloud layer, albeit thin, overlapping the -8C to -13C layer, some “low quality” flurries are likely to pop up primarily in the northern County Wide Area. There could be some brief visibility reductions with flurries, but accumulation is not expected. Winds will gradually ease late morning into the afternoon from west to east.

WINDS MONDAY

45 MPH 6AM to 9AM
32 MPH by 4PM
25 MPH by 7PM
15 MPH by 12AM

COLD ADVECTION

Wind blowing from region of cold air to a region of warm air.

The cold advection will not allow temperatures to recover on Monday, with possibly a climb of a couple of degrees at best in the afternoon. Wind chills will be in the teens much of the day. The high pressure will spread over the area during Monday night with winds dropping off. Before they do, some single digit wind chills may unfold during the evening. Low temperatures Monday night have the potential to drop down widespread into the single digits (even a -1 from the 12Z MET guidance for Rochelle). One fly in the ointment to that is the likelihood of incoming high to mid clouds late Monday night/early Tuesday morning. We accounted for those in the forecast, but if the clouds look less likely, the lows will need to be inched downward.

Weather Radar) shows light precipitation moving southwest to northeast at 4:40 p.m. Clouds cover all of northern Illinois.

See also Arlingtoncardinal.com/clouds

https://twitter.com/NWSChicago/status/1467611093702832137

Wind Advisory

URGENT – WEATHER MESSAGE
National Weather Service Chicago IL
154 PM CST Sun Dec 5 2021

Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Northern Cook-Central Cook-Southern Cook-
Northern Will-Southern Will-Eastern Will-Lake IN-Porter-

Including the cities of Rockford, Belvidere, Crystal Lake, Algonquin, McHenry, Woodstock, Waukegan, Buffalo Grove, Mundelein, Gurnee, Rochelle, Oregon, Byron, Dixon, DeKalb, Sycamore, Aurora, Elgin, Naperville, Wheaton, Downers Grove, Lombard, Carol Stream, Ottawa, Streator, La Salle, Mendota, Marseilles, Oswego, Yorkville, Plano, Morris, Coal City, Minooka, Evanston, Des Plaines, Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn, Oak Park, La Grange, Calumet City, Oak Forest, Lemont, Orland Park, Park Forest, Joliet, Bolingbrook, Plainfield, Mokena, Channahon, Manhattan, Wilmington, Crete, Peotone, Beecher, Gary, Hammond, Merrillville, Portage, Valparaiso, and Chesterton

154 PM CST Sun Dec 5 2021

…WIND ADVISORY IN EFFECT FROM 2 AM TO NOON CST MONDAY…

* WHAT…Wind gusts from the west up to 45 to 50 mph expected.

* WHERE…Portions of north central and northeast Illinois, and
far northwest Indiana, mainly along and north of Interstate 80.

* WHEN…From 2 AM tonight to noon CST Monday.

* IMPACTS…Gusty winds could blow around unsecured objects, such
as outdoor holiday decorations. Tree limbs could be blown down
and a few power outages may result.

* ADDITIONAL DETAILS…Driving will be difficult for high profile
vehicles, especially on north to south roadways.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

 O’HARE FORECAST … 

Tonight: Areas of rain before midnight, then a chance of flurries after 3am. Cloudy, then gradually becoming partly cloudy, with a low around 29. Breezy, with a west wind 10 to 15 mph increasing to 20 to 25 mph after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 40%.

Monday: A chance of flurries before 9am. Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 23 by 5pm. Breezy, with a west northwest wind 15 to 25 mph, with gusts as high as 45 mph.

Monday Night: Partly cloudy, with a low around 11. Wind chill values as low as -1. West northwest wind 10 to 15 mph, with gusts as high as 30 mph.

Tuesday: Mostly cloudy, with a high near 24. Wind chill values as low as 1. West northwest wind around 5 mph becoming south southwest in the afternoon. Winds could gust as high as 10 mph.

Tuesday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 20. South southwest wind around 5 mph.

Wednesday: Partly sunny, with a high near 34.

Wednesday Night: Mostly cloudy, with a low around 26.

Thursday: A chance of snow before 9am, then a chance of rain and snow. Mostly cloudy, with a high near 39.

Thursday Night: Mostly cloudy, with a low around 33.

Friday: A slight chance of rain and snow before 9am, then a chance of rain. Cloudy, with a high near 45.

Friday Night: Rain and snow likely. Cloudy, with a low around 35.

Saturday: A chance of rain and snow. Mostly cloudy, with a high near 40.

Saturday Night: A slight chance of rain and snow. Partly cloudy, with a low around 27.

Sunday: Sunny, with a high near 41.

 LAKE TEMPS … 

SOUTHERN LAKE MICHIGAN WATER TEMPERATURES
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
907 AM CST Sun Dec 5 2021

LAKE MICHIGAN WATER TEMPERATURES…

CHICAGO SHORE……….45.

CHICAGO CRIB……….42.

MICHIGAN CITY……….44.

SOUTH MID LAKE BUOY……….46.

&&

M IS FOR MISSING DATA THAT IS NORMALLY AVAILABLE.

THE MICHIGAN CITY WATER TEMPERATURE SENSOR IS LOCATED AT A WATER
INTAKE ONE MILE OFFSHORE AND 60 FEET BELOW WATER SURFACE. IT IS READ
EVERY DAY OF THE YEAR.

december.chicagoweatherstation.com

Arlingtoncardinal.com/radar

Chicago Weather Forecast for your MAC/PC/TABLET includes surrounding suburbs.

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