FRIDAY Hi 50, mostly cloudy, light rain 9p to 11p, Wind Advisory, winds SSW to WSW, 21 to 24 MPH, G33 to 41 to 40 MPH
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Friday and Friday Night …
Weather Hazards expected…
Elevated Non Thunderstorm Wind Risk.
National Weather Service Chicago IL 949 AM CST Fri Dec 2 2022
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage- La Salle-Kendall-Northern Cook-Central Cook- 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, Evanston, Des Plaines, Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn, Oak Park, and La Grange
949 AM CST Fri Dec 2 2022
…WIND ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 9 AM CST SATURDAY…
* WHAT…West winds 20 to 30 mph with gusts up to 45 mph expected.
* WHERE…Portions of north central and northeast Illinois.
* WHEN…From 6 PM this evening to 9 AM CST Saturday.
* IMPACTS…Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.
PRECAUTIONARY/PREPAREDNESS ACTIONS…
Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects.
DISCUSSION…
Southerly winds will gust to 40 to 45 mph on this afternoon and evening ahead of a cold front. Westerly winds will then gust to 45 mph, possibly higher, behind the cold front late tonight night into early Saturday morning.
Temperatures will be seasonably mild this afternoon with highs in the upper 40s and lower 50s the aforementioned cold advection will rapidly drop temperatures behind the front tonight.
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O’HARE FORECAST …
Forecast Beginning Friday, Dec. 02, 2022
Today: Mostly cloudy, with a high near 50. Breezy, with a south wind 20 to 25 mph, with gusts as high as 40 mph.
Tonight: A 30 percent chance of rain, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 22. Windy, with a south southwest wind 25 to 30 mph becoming west northwest after midnight. Winds could gust as high as 45 mph.
Saturday: Sunny, with a high near 30. Blustery, with a west northwest wind 15 to 20 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 40 mph.
Saturday Night: Mostly clear, with a low around 21. West wind 5 to 10 mph.
Sunday: Sunny, with a high near 40. West southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Sunday Night: Partly cloudy, with a low around 25.
Monday: A 30 percent chance of rain after noon. Mostly cloudy, with a high near 42.
Monday Night: Mostly cloudy, with a low around 31.
Tuesday: Partly sunny, with a high near 40.
Tuesday Night: Mostly cloudy, with a low around 23.
Wednesday: Partly sunny, with a high near 34.
Wednesday Night: Partly cloudy, with a low around 22.
Thursday: Partly sunny, with a high near 35.
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SUNLIGHT DATA FOR SECURITY, TRAFFIC SAFETY, AND SPORTS
SunCalc.net data with solar azimuth and trajectory, times for dawn, sunrise, solar noon, sunset, dusk …
NIGHT SKY THIS MONTH …
Backyard stargazers get a monthly guide to the northern hemisphere’s skywatching events with “Tonight’s Sky.” Check the night sky objects for this month and past months in the playlist from the Space Telescope Science Institute YouTube channel (Musical track The Far River written by Jonn Serrie, from the album And the Stars Go With You courtesy of New World Music Ltd).
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Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
1131 AM CST Fri Dec 2 2022
.UPDATE… Issued at 1041 AM CST Fri Dec 2 2022
The going forecast remains in decent shape for a windy and gloomy afternoon with only minor adjustments made to winds for tonight.
A strengthening surface low continues to move northeastward across the northern Plains and upper Midwest this morning ahead of an upper-level trough that is moving over the northern Rockies. A cold front extends from this low southwestward across central South Dakota into the northern Four Corners region. This cold front is what will bring us a chance for some light showers and/or drizzle late this afternoon through the early overnight hours as the front moves through the area.
Ahead of the front a tightening pressure gradient will support increasing winds through this afternoon with gusts upwards of 35 to 40 mph expected areawide with higher gusts to 45 mph expected for areas southeast of I-55 where a Wind Advisory remains in effect. As the cold front begins to approach the area this evening guidance continues to show a strong 40 to 50 kt low-level jet developing along and just ahead of the front which forecast soundings show the atmosphere should be able to tap into especially in the strong cold advection behind the front. Wind gusts of 40 to 45 mph, possibly higher, are expected to persist through the night and into the early morning hours of our Saturday. Given the continued guidance support of this scenario the Wind Advisory has been expanded to cover the rest of northern Illinois and has been extended into Saturday morning to account for this gusty wind potential. Winds are expected to gradually ease through the day on Saturday as a surface high begins to move into the area.
Lastly, while temperatures will be seasonably mild this afternoon with highs in the upper 40s and lower 50s the aforementioned cold advection will rapidly drop temperatures behind the front tonight. Temperatures on Saturday morning will be in 20s and struggle to warm much above freezing Saturday afternoon. On top of that the breezy winds in the morning will also create wind chills in the 5 to 15 degree range.
Yack/NWS Chicago
