🌕 🌗 🌑 🌓 Full Moon, sky cover overnight Fri. to Sat. 100%, winds NW to N, 6 to 5 MPH, Low 28, 4a to 6a
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 1: Forecast and information text below may refer to a previous night on Arlingtoncardinal.com, and might not be updated until late afternoon, evening, or overnight. However, Night Sky archives on CARDINAL NEWS Magazine include text forecasts that correspond to the lunar phase graphic above.
NOTE 2: 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 Friday/Saturday …
No Weather Hazards expected …
Complete cloudiness continues to affect the area. Longer range forecasts have indicated the sun will shine, but mostly cloudy conditions persist for one meteorological reason or another.
DISCUSSION…
Early morning GOES water vapor imagery continues to depict an upper level trough from the Great Lakes across the Northeast and
eastern Canada. An extensive area of low stratus was evident in IR imagery from the Great Lakes back into Wisconsin/northern
Illinois, spreading slowly south- southwest in response to low level north-northeast winds within the southeastern periphery of the surface high to our northwest.
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O’HARE FORECAST …
Forecast Beginning Friday Night, Jan. 06, 2023 …
Friday Night: Mostly cloudy, with a low around 24. Northwest to north wind around 5 mph.
Saturday: Mostly cloudy, with a high near 35. Northeast wind around 5 mph.
Saturday Night: Mostly cloudy, with a low around 26. Northeast wind around 5 mph becoming calm in the evening.
Sunday: A chance of flurries before noon. Mostly cloudy, with a high near 36. Calm wind becoming west around 5 mph in the afternoon.
Sunday Night: Partly cloudy, with a low around 24. West southwest wind 5 to 10 mph.
Monday: Mostly sunny, with a high near 39. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Monday Night: Mostly cloudy, with a low around 31.
Tuesday: Partly sunny, with a high near 42.
Tuesday Night: Mostly cloudy, with a low around 32.
Wednesday: Mostly cloudy, with a high near 42.
Wednesday Night: Mostly cloudy, with a low around 35.
Thursday: A chance of rain. Cloudy, with a high near 41.
Thursday Night: A chance of rain and snow. Cloudy, with a low around 32.
Friday: Mostly cloudy, with a high near 37.
O’Hare forecast archive and hourly weather observations archive are available HERE on the CARDINAL NEWS Magazine.
Arlingtoncardinal.com/moonphases
Arlingtoncardinal.com/nightsky
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
311 AM CST Sat Jan 7 2023
.SHORT TERM… Issued at 311 AM CST Sat Jan 7 2023
Through Sunday…
Early morning GOES water vapor imagery continues to depict an upper level trough from the Great Lakes across the Northeast and eastern Canada. To our west, a mid-level short wave was propagating slowly east across eastern NE/KS. At the surface, high pressure extended from the eastern Dakotas into the upper MS valley and Ontario, while low pressure was evident across eastern OK in association with the NE/KS short wave and an attendant 120+ kt upper level jet streak. An extensive area of low stratus was evident in IR imagery from the Great Lakes back into WI/northern IL, spreading slowly south- southwest in response to low level north-northeast low level winds within the southeastern periphery of the surface high to our northwest. An AMDAR aircraft descent sounding into KMDW around 0525Z showed this stratus layer to be relatively thin, trapped below a sharp inversion based around 1200 feet AGL. Model initializations appear to be having a tough time with this thin cloud layer, lending somewhat low confidence to forecast cloud cover trends across the area today. Would expect east/northeast parts of the forecast area to have the toughest time eroding the stratus, especially with continued advection from across the lake into MI. Thus expecting mostly cloudy conditions for the Chicago area, while areas farther northwest and west may see some decrease in cloud cover. Clouds have helped to prevent temps from falling too much overnight, and highs today are expected to be largely in the mid-30s.
Attention then turns to the mid-level short wave/weak closed low advancing slowly east into IA by this evening, and eventually drifting across the forecast area on Sunday. The best low level mass response and moisture advection associated with this disturbance continues to be focused south of the cwa across the lower MO/OH valleys and central/southern parts of IL and IN. Weaker forcing does eventually develop into northern IL/IN later tonight into Sunday, though with little in the way of deeper moisture advection into the forecast area. Lack of strong jet forcing and only modest isentropic ascent appear rather unimpressive given dry low levels noted in forecast sounding profiles, though soundings do depict fairly steep mid-level lapse rates aloft (7-7.5 C/km in the 700-500 mb layer). Given this, have maintained chance pops late tonight through Sunday morning mainly south of the I-80 corridor form the potential for some minor accumulations (a dusting to less than an inch), and included a chance of flurries as far north as about I-88 across northern IL where drier low levels should prevent any measurable snow threat. Precip chances will diminish from west to east after midday Sunday as the upper trough axis moves slowly east. Not completely out of the question that some patchy drizzle/freezing drizzle could develop within the low-level stratus layer north of the better snow chances early Sunday, though the moist layer may likely be too shallow for that to materialize. Daytime temps are expected to rise above freezing again Sunday, with highs again in the mid-30s.
Ratzer/NWS Chicago
