Scattered thunderstorms moved across northern Illinois during the afternoon and early evening of August 28th producing scattered wind damage.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LOT wrote it up.
Scattered thunderstorms moved across northern Illinois during the afternoon and early evening of August 28th producing scattered wind damage.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Chicago, IL wrote its last area forecast discussion before the first event at Aug 28, 1:03 PM CST, 19 minutes earlier.
Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 203 PM CDT Sun Aug 28 2022 .MESOSCALE DISCUSSION... Issued at 127 PM CDT Sun Aug 28 2022 Overall, there haven't been any significant changes to the forecast thinking through this evening. Convectively-augmented MCV continues to pivot northeastward across eastern Iowa early this afternoon with convective elements on its north and eastern periphery beginning to slowly intensify. This trend will continue the rest of the afternoon. The special 17z Quad Cities sounding showed respectable destabilization--not surprising given the surge of low 70 degree dewpoints northward into the region--and instability profiles are probably even a little bit better in our area with a longer period of heating ahead of convective debris cloud cover. Additionally, the sounding and DVN's VWP show 0-3 km bulk shear values are increasing past 35 kts as an localized enhancement to the 700 mb wind field is arriving. Forecast soundings show that effective inflow layers will top out just under 2 km, such that the full effect of the 700 mb flow enhancement may not be realized. Additionally, surface winds do remain pretty veered, which is limiting the degree of hodograph curvature, and low-level lapse rates aren't exceedingly steep. Still, some concern that a few brief tornadoes may occur as cells crossing the Mississippi River continue to gradually intensify, mainly for areas north and west of an Amboy to DeKalb to Marengo line. Otherwise, the main threat will be from localized damaging wind gusts from bowing segments. Recently-issued severe thunderstorm watch for areas north and west of I-55 through 7 PM. There is some uncertainty regarding how far east the main severe weather threat will extend, and recent HRRR runs continue to plunk explicit stronger gusts across northern Illinois, and indeed the environment may remain at least modestly favorable for severe gusts into the Chicago area later this evening. Will monitor for the need for a local expansion/extension of the watch this afternoon. Convection should gradually diminish in intensity through the evening as convective inhibition diurnally increases. Thinking that much of our area should be precipitation-free after about 11 PM or thereabouts. Overnight, additional thunderstorm development is possible ahead of the cold front in northern Iowa. Guidance continues to remain pretty split on this, but thinking right now is that given the magnitude of elevated instability and developing warm advection, a forward-propagating MCS should eventually materialize. This should weaken with time through the late overnight hours, but may remain intact enough to toss showers and thunderstorms across northern Illinois towards daybreak. Carlaw && .SHORT TERM... Issued at 141 PM CDT Sun Aug 28 2022 Monday through Monday night... Heading into the start of the new work week, seems the active weather pattern holds in place for Monday. A Low pressure core in the upper atmosphere will slip through southern Canada, with the massive trof stretched across the northern US as two higher pressure systems dominate the southern US. This driving Low pressure system will be the root-cause for additional showers and storms Monday afternoon. A strengthening frontal boundary will progress from the eastern Plains through the Midwest and Great Lakes, bringing another round of strong to severe storms to the region. Some discrepancies in model guidance with storm development through the morning into the afternoon. CAMs show some pre-frontal initiation late morning into the early afternoon, while core models (GFS, ECMWF, Canadian) do not bring this about and hold off on main activity with the frontal progression. Much like today, expecting temperatures to once again climb back into the mid and upper 80s with instability being prime for strong to severe storms. Will need to continue monitoring this situation for additional changes to the forecast, but at this time focusing on today's threat. Baker && .LONG TERM... Issued at 141 PM CDT Sun Aug 28 2022 Tuesday through Sunday... No changes were made to the extended forecast as main focus is on severe threats today and Monday. Looking at the upcoming week though, conditions return to higher pressure with temperatures back into the upper 70s and low 80s for highs and overnights in the 50s and 60s. High pressure dominates the southwest CONUS, with a weak secondary High off the southeast coast. These are modeled to hold any attempts from Low pressure system in Canada at bay. Baker && .AVIATION... For the 18Z TAFs... The primary aviation weather concerns through the 18Z TAF period are as follows: * Rain and thunderstorms over the terminals late this afternoon and evening featuring heavy downpours leading to visby reductions * Additional heavy rain chances early Monday morning * More rain and storms possible Monday afternoon and evening Thunderstorms are beginning to fire up just west of the IL/IA stateline. These storms will progress eastward and are expected to move over the Chicagoland terminals from roughly 23Z through 02z. The primary concern with these storms are heavy downpours likely leading to periods of reduced visbys in addition to locally strong wind gusts and frequent lightning. Visbys are expected to drop below MVFR, and possibly IFR, thresholds within these heavy downpours. Cigs through the event should remain predominantly VFR, although they could drop into MVFR territory underneath and in the vicinity of some of these storms. Most of the overnight will be dry with VFR conditions. Beginning in the predawn hours of Monday morning, another swath of heavy rain could be moving over the metro. Confidence in the coverage and timing of this morning system is still very shaky, but periods of downpours and resultant visby reductions appear very possible, similar to what ORD saw this morning. Another system of showers and thunderstorms will be moving through northern IL Monday afternoon and evening. Most guidance suggests that the far better chances for thunderstorms exist southwest of the terminals, though at least some light to moderate showers appear likely. Doom && .LOT WATCHES/WARNINGS/ADVISORIES... IL...None. IN...None. LM...None. && Visit us at weather.gov/chicago Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/NWSChicago www.twitter.com/NWSChicago www.youtube.com/NWSChicago
Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
1217 PM CDT Sun Aug 28 2022
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-291730-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1217 PM CDT Sun Aug 28 2022 /117 PM EDT Sun Aug 28 2022/
This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk...with an associated:
Limited Tornado risk.
Limited damaging wind risk...up to 60 mph.
Limited Flooding Risk.
DISCUSSION...
Scattered thunderstorms are likely over parts of northern IL this
afternoon and evening. The strongest will be capable of producing
isolated instances of strong damaging wind gusts. In addition,
there is a threat for a brief tornado or two. Finally, heavy
rainfall is also like to accompany these thunderstorms, and this
could result in localized areas of minor flooding.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Monday...
Limited Afternoon and Evening Severe Thunderstorm Risk.
Limited Afternoon and Evening Flooding Risk.
Limited Excessive Heat Risk.
DISCUSSION:
Conditions may become favorable for thunderstorms with a cold front
late Monday afternoon and evening. Strong damaging wind gusts and
very heavy rainfall may accompany these storms, especially in areas
along and south of Interstate 88.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed this afternoon.
GENERAL STORM MOTION OF THE DAY:
Moving toward the northeast at 30 to 35 mph.
LMZ740>745-291730-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
1217 PM CDT Sun Aug 28 2022
This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
Limited Thunderstorm Risk...with an associated:
Limited thunderstorm wind gust risk...up to 50 knots.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
Monday...
Limited Severe Thunderstorm Risk.
Carlaw
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www.youtube.com/nwschicagoThe Quad Cities radar (KDVN), 94 km away, was scanning. The volume nearest the first event began at 19:21 UTC.
18 thunderstorm wind, 1 hail, 1 flood. Local standard time, as filed.
A 5 inch diameter, 15 foot long tree limb was blown down. Numerous other tree limbs were blown down.
A photo showed a large live tree that was snapped near its base.
A photo shared on social media showed a utility pole and large tree limbs were blown down.
A photo shared on social media showed a 2 to 3 foot diameter tree that was snapped at the intersection of Meridian Road and West State Street.
A photo shared on social media showed trees blown down in a backyard.
Photos showed large live trees that were mostly uprooted. A few large tree limbs were also blown down.
Large tree limbs estimated to be 8 to 12 inches in diameter were blown down on 9th Avenue and on 9th Street. Numerous large tree limbs were blown down near 10th Avenue and Lincoln Highway.
Tree limbs were blown down.
A photo shared on social media showed a roughly 2 foot diameter tree blown down.
A photo showed a metal farm outbuilding that was destroyed.
A large tree limb was blown down on the campus of Northern Illinois University.
A photo shared on social media showed large tree limbs around 6 inches in diameter blown down.
Multiple sign poles were bent over near Somonauk Road and Route 38.
The roof was blown off of a large grain silo that was 60 feet tall and 20 feet wide.
A photo shared on social media showed a few large tree limbs roughly 6 to 12 inches in diameter that were blown down. A portion of a metal fence was destroyed by the fallen tree limbs.
Video shared on social media showed water over a roadway in downtown DeKalb. Several roads were covered by flood waters of varying depths. The DeKalb Airport measured 1.42 inches of rain in one hour. A spotter 3 miles northeast of DeKalb measured a storm total of 3.30 inches of rain.
Numerous tree limbs were blown down on the south side of Des Plaines, particularly between Howard Avenue and Algonquin Road.
Video shared on social media showed winds gusting to an estimated 60 mph.
Photos shared on social media showed at least 3 large diameter tree limbs blown down in the 7300 block of Greenleaf Avenue, blocking the road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2022Every state in 2022This day in weather historyWarnings in Illinois, August 2022
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1043812, 1043813, 1043814, 1043815, 1043818, 1043822, 1043840, 1043920, 1043921, 1043928, 1043924, 1043939, 1043938, 1043935, 1043940, 1043941, 1044031, 1044011, 1043942, 1044018.