Thursday Hi 66, mostly sunny to mostly cloudy, winds SE to S to E, 6 to 10 to 8 MPH, G13 to 15 to 14 MPH, 8a to 12p
⏪ Hrly Data Table | Hrly Future Graph ⏩
IMPORTANT NOTE ON NWS DATA
⏪ Hrly Data Table | Hrly Future Graph ⏩
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Thursday and Thursday Evening …
No Weather Hazards expected …
Mostly sunny beautiful day.
Short term forecast highlights include sunny and warmer weather today with a smaller lake-cooling footprint, then increasing clouds tonight with rain chances mainly southeast of I-55 later tonight into Friday.
O’HARE FORECAST …
Forecast Beginning Thursday, Apr. 27, 2023
Thursday: Sunny, with a high near 66. South wind around 10 mph.
Thursday Night: Mostly cloudy, with a low around 45. East wind 5 to 10 mph.
Friday: A 20 percent chance of showers. Mostly cloudy, with a high near 61. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night: Partly cloudy, with a low around 44. North northeast wind 5 to 10 mph becoming light and variable after midnight.
Saturday: Showers likely, mainly after 1pm. Mostly cloudy, with a high near 59. West wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 60%.
Saturday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 41.
Sunday: A 50 percent chance of showers. Mostly cloudy, with a high near 50.
Sunday Night: A chance of showers. Mostly cloudy, with a low around 38.
Monday: A chance of showers. Mostly cloudy, with a high near 50.
Monday Night: Mostly cloudy, with a low around 40.
Tuesday: Partly sunny, with a high near 57.
Tuesday Night: Partly cloudy, with a low around 42.
Wednesday: Mostly sunny, with a high near 65.
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
619 AM CDT Thu Apr 27 2023
.SHORT TERM… Issued at 313 AM CDT Thu Apr 27 2023
Short term forecast highlights include sunny and warmer weather today with a smaller lake-cooling footprint, then increasing clouds tonight with rain chances mainly southeast of I-55 later tonight into Friday. Temperatures remain will mild Friday outside of the thicker cloud cover and showers across the southeastern cwa, and away from Lake Michigan where onshore winds will kee Preadings cooler.
Surface high pressure ridging stretches from southern Quebec southwest across the Great Lakes and into northern Missouri per latest analysis. Light east-southeast winds, temperatures in the low to mid 30s (outside of Chicago) and some thin patchy high cirrus represent the resulting quiet early morning weather conditions. This quiet weather will continue today, as we remain within the western periphery of the surface high pressure ridge. Modest warm advection aloft will allow continued moderation of temperatures across the forecast area, while south-southeast surface winds will result in a smaller footprint of lake cooling which will be focused mainly across the north shore suburbs and the immediate lake shore elsewhere. 925 mb temperature climatology and forecast soundings support highs warming into the mid-upper 60s across the west/south parts of the cwa, while locations near Lake Michigan top out in the mid-50s. While thin high clouds will gradually increase later this afternoon from the south ahead of a short wave propagating from the Southern Plains, plenty of sun is expected.
Guidance has trended farther south with the track of the aforementioned southern Plains wave tonight into Saturday, and its associated surface low pressure center which is progged to track through the Ohio Valley late tonight into Friday. This more southern track focuses better moisture return and resulting precipitation across southern and central IL/IN during this period, with rain mainly glancing the southeastern cwa east/southeast of the I-55 (or even I-57) corridor. Thus the northwest half to two thirds of the forecast area look to remain dry through Friday and have significantly lowered pops. Far southeast cwa counties will likely see less than two tenths of an inch of rain, with greater amounts south and east of the forecast area. Showers linger especially Friday morning in the southeast, while dry weather with mostly cloudy skies are expected farther north and west.
Lows tonight will remain largely in the 40s, though a few spots near the IL/WI border may dip into the upper 30s where cloud cover will likely not be as thick. Western parts of the forecast area still look to reach the mid-upper 60s Friday afternoon, while northeast surface winds and thicker clouds in the southeast parts of the forecast area keep temps in the low 60s and areas near Lake Michigan in the 50s.