Sunday Hi 67, mostly sunny with some cirrus clouds, winds SSW to S to SSE to S, 10 to 11 to 8 MPH, G15 to 17 to 15 MPH, 12p to 5p
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IMPORTANT NOTE ON NWS DATA
⏪ Hrly Data Table | Hrly Future Graph ⏩
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Sunday and Sunday Evening …
No Weather Hazards expected …
Scattered clouds 20,000 to 25,000 feet moving northwest to southeast
Sunday high temperature 67 well above normal 56.
Only forecast “challenge” is extent and opaqueness of cirrus and its potential minor impact on temps.
Slowly dampening shortwave trough is moving east across the northern and central Plains early this morning with plenty of cirrus evident on IR imagery in advance and this wave.
O’HARE FORECAST …
Forecast Beginning Sunday, Apr. 09, 2023
Sunday: Mostly sunny, with a high near 67. South wind around 10 mph, with gusts as high as 15 mph.
Sunday Night: Partly cloudy, with a low around 47. South wind 5 to 10 mph.
Monday: Mostly cloudy, then gradually becoming sunny, with a high near 68. Southwest wind around 10 mph, with gusts as high as 15 mph.
Monday Night: Mostly clear, with a low around 49. Southwest wind around 10 mph.
Tuesday: Mostly sunny, with a high near 73. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night: Partly cloudy, with a low around 56. Breezy.
Wednesday: Sunny, with a high near 76. Breezy.
Wednesday Night: Clear, with a low around 56.
Thursday: Sunny, with a high near 77.
Thursday Night: Mostly clear, with a low around 56.
Friday: Mostly sunny, with a high near 79.
Friday Night: Partly cloudy, with a low around 58.
Saturday: A chance of showers. Partly sunny, with a high near 76.
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
608 AM CDT Sun Apr 9 2023
.SHORT TERM… Issued at 246 AM CDT Sun Apr 9 2023
Benign and mild weather will continue through Monday. Only forecast “challenge” is extent and opaqueness of cirrus and its potential minor impact on temps.
Slowly dampening shortwave trough is moving east across the northern and central Plains early this morning with plenty of cirrus evident on IR imagery in advance and this wave. There are some fairly cold cloud tops (AOB -25C) likely suggesting that the cirrus isn`t terribly thin. Given forecast soundings showing a fairly deep moist layer (AOA 20kft) and the upstream satellite trends, have nudged sky cover up a bit in the grids today. Also knocked a degree or two off of going high temps as a nod to the expected high cloudiness. What`s left of the trough should move east of the area Monday, with decreasing mid-high cloudiness expected in its wake during the day Monday.
A bit stronger southerly synoptic gradient today, so lake breeze is expected to struggle to penetrate very far inland today. Lake breeze should be most successful in moving inland along the IL north shore. By Monday, southwest winds may keep the lake breeze offshore, so progressively less lake cooling is expected today and tomorrow.
– Izzi/NWS Chicago