🌖 🌗 🌑 🌓 Waning Gibbous Moon, sky cover overnight Tue. to Wed. 60% to 4%, winds SW, 6 to 14 MPH, G21 to 20 MPH, Low 60, 6a to 7a
NWS CHGO | NWS HRLY | /NWSchicago | 🌡
ARLINGTON HEIGHTS WEATHER
▴ forecast7 (Arl. Hts.) | RADAR | WIDE RADAR
IMPORTANT NOTE ON NWS DATA
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NIGHT FORECASTS …
NOTE: Keep in mind lunar rise and set times don’t always correspond with night weather and early morning lows because on some days during the month the moon is visible in the sky predominantly during the daytime hours.
Overnight Tuesday/Wednesday …
Weather Hazards expected …
Significant Fire Weather Risk.
Red Flag Warning activated at 2:40 a.m. for Wednesday 11 AM to 7 PM.
Very dry, windy, and unseasonably warm today, which will create conditions very favorable for the ignition and rapid spread of wildfires.
Red Flag Warning URGENT – FIRE WEATHER MESSAGE
National Weather Service Chicago IL
240 AM CDT Wed Apr 12 2023
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-Cook- La Salle-Kendall-Grundy-Will-Kankakee-Livingston-Iroquois-Ford- Lake IN-Porter-Newton-Jasper-Benton- 240 AM CDT Wed Apr 12 2023 /340 AM EDT Wed Apr 12 2023/
…RED FLAG WARNING IN EFFECT FROM 11 AM CDT THIS MORNING TO 7 PM CDT THIS EVENING…
The National Weather Service in Chicago has issued a Red Flag Warning, which is in effect from 11 AM CDT this morning to 7 PM CDT this evening. The Fire Weather Watch is no longer in effect.
* Affected Area…Lake (IN), Porter, Winnebago, Boone, McHenry, Lake (IL), Ogle, Lee, Newton, De Kalb, Jasper, Kane, DuPage, Cook, La Salle, Benton, Kendall, Grundy, Will, Kankakee, Livingston, Iroquois, and Ford Counties.
* Timing…11 AM to 7 PM CDT Wednesday.
* Winds…Southwest 15 to 20 mph with gusts up to 35 mph.
* Relative Humidity…As low as 20 percent.
* Impacts…Dry fuels, low relative humidity, and strong winds will create conditions favorable for the rapid spread of wildfires.
A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
O’HARE FORECAST …
Forecast Beginning Tuesday Night, Apr. 11, 2023 …
Tuesday Night: Partly cloudy, with a low around 58. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday: Sunny, with a high near 81. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 35 mph.
Wednesday Night: Clear, with a low around 56. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday: Sunny, with a high near 79. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night: Mostly clear, with a low around 55. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Friday: Mostly sunny, with a high near 75.
Friday Night: Partly cloudy, with a low around 58.
Saturday: Showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 73.
Saturday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 45.
Sunday: A chance of showers. Partly sunny, with a high near 55. Breezy.
Sunday Night: Partly cloudy, with a low around 39. Breezy.
Monday: Mostly sunny, with a high near 53. Breezy.
Monday Night: Partly cloudy, with a low around 40.
Tuesday: Mostly sunny, with a high near 57.
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
1242 AM CDT Wed Apr 12 2023
.SHORT TERM… Issued at 249 PM CDT Tue Apr 11 2023
Through Wednesday night…
Upper level ridging remains overhead continuing the dry and mild pattern. Southwest winds become lighter this evening as the inversion builds, but will ramp back up Wednesday morning into Wednesday afternoon with gusts around 30 to 40 mph across much of the area. This is due to the tight pressure gradient between the high pressure to the southeast and developing low off of the Rockies. Highest gusts look to be toward the IL/WI border. Looking at 925 mb temperatures in the 17 to 20C range highs are expected to be around 80. Wednesday night southwest winds will become lighter but we could still see some gusts around 20 mph through most of the night.