🌘 🌑 🌗 🌕 Waning Crescent Moon, sky cover overnight Mon. to Tue. 7% to 50% to 22%, winds NW to NNW to WSW to SW, 3 to 1 to 3 MPH, Low 27, 5a to 7a
NWS CHGO | NWS HRLY | /NWSchicago | 🌡
ARLINGTON HEIGHTS WEATHER
▴ forecast7 (Arl. Hts.) | RADAR | WIDE RADAR
IMPORTANT NOTE ON NWS DATA
Monday Night …
No Weather Hazards expected…
This Weather Outlook is for portions of North Central Illinois…Northeast Illinois and Northwest Indiana.
Slightly declining temperatures overnight Monday to Tuesday from the low 30s to the upper 20s, thanks to initial clear skies, light winds and a dry air mass. A typical late autumn loss of heat after a sunny day with a chill in the air even before sunset. Winds calm or less than 3 MPH and shifting northwest to north-northeast to west-southwest to southwest. Cirrus clouds passing by north of I-80 after 9:00 p.m.
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O’HARE FORECAST …
Forecast Beginning Monday Night, Nov. 21, 2022
Monday Night: Mostly clear, with a low around 26. West northwest wind around 5 mph becoming south southwest after midnight.
Tuesday: Sunny, with a high near 46.
Tuesday Night: Mostly clear, with a low around 30.
Wednesday: Mostly sunny, with a high near 49.
Wednesday Night: Mostly cloudy, with a low around 36.
Thanksgiving Day: A chance of rain after noon. Mostly cloudy, with a high near 48.
Thursday Night: A chance of rain and snow. Mostly cloudy, with a low around 35.
Friday: A chance of rain and snow. Mostly cloudy, with a high near 41.
Friday Night: Mostly cloudy, with a low around 30.
Saturday: Partly sunny, with a high near 41.
O’Hare forecast archive and hourly weather observations archive are available HERE on the CARDINAL NEWS Magazine.
NIGHT SKY THIS MONTH …
Check the night sky objects for this month and past months in the playlist from the Space Telescope Science Institute YouTube channel Backyard stargazers get a monthly guide to the northern hemisphere’s skywatching events with “Tonight’s Sky” (Musical track The Far River written by Jonn Serrie, from the album And the Stars Go With You courtesy of New World Music Ltd. Musical track The Far River written by Jonn Serrie, from the album And the Stars Go With You courtesy of New World Music Ltd).
Telephoto lens, ISO 100, f/11, Shutter Speed 1/100 to 1/125 for the Moon.
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Telephoto lens, ISO 1600, f/11, Shutter Speed 2.5″ for the skyline. The skyline exposure was toned down, and brightness and contrast was adjusted in Photoshop.
Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
1129 PM CST Mon Nov 21 2022
.UPDATE… Issued at 841 PM CST Mon Nov 21 2022
No significant changes to the going forecast this evening, save to make some hourly temp tweaks in our digital forecast database to account strong radiational cooling early this evening.
Weak surface cold front continues to push across roughly the I-57 corridor at mid-evening, though weak gradient and light wind field makes it a pretty subtle boundary. Initial clear skies, light winds and dry air mass has supported a quick decrease in temps into the mid-upper 20s in many spots after sunset. Based on upstream dew points this afternoon, overnight mins from near 20 in some of our typical cold spots to around 30 in downtown Chicago look reasonable, with low-mid 20s widespread outside of the urban core. Otherwise, light and variable or calm winds are expected overnight with some patchy cirrus passing across areas mainly along/north of I-80.
Other than the aforementioned near term temp trends, going forecast has all of the above in good shape this evening.