A strong nocturnal low-level jet interacting with a nearly stationary frontal boundary triggered a Mesoscale Convective System (MCS) over northern Missouri during the pre-dawn hours of June 17th. The large thunderstorm cluster tracked east-southeastward along the boundary, producing significant wind damage and flash flooding.
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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 ILX wrote it up.
A strong nocturnal low-level jet interacting with a nearly stationary frontal boundary triggered a Mesoscale Convective System (MCS) over northern Missouri during the pre-dawn hours of June 17th. The large thunderstorm cluster tracked east-southeastward along the boundary, producing significant wind damage and flash flooding. The storms were focused along and southeast of a Rushville...to Springfield...to Shelbyville...to Robinson line. Numerous trees and power lines were blown down. In addition, very heavy rainfall of 3 to 5 inches along and south of a Jacksonville to Effingham line created pockets of flash flooding.
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 Lincoln, IL wrote its last area forecast discussion before the first event at Jun 17, 1:39 AM CST, 55 minutes earlier.
Area Forecast Discussion National Weather Service Lincoln IL 239 AM CDT Fri Jun 17 2022 .SYNOPSIS... Issued at 237 AM CDT Fri Jun 17 2022 Scattered strong thunderstorms are expected early this morning, mainly south of a Quincy to Decatur line. Once storms depart, clouds will diminish through the day. Some temporary relief from the heat is expected today and Saturday, as lower humidity air filters into the region. Highs will be in the mid 80s today, and low 80s on Saturday. The relief will be short-lived, as temperatures return to the 90s for next week. Aside from the storms this morning, no rainfall is expected through at least Tuesday. && .SHORT TERM...(Today and tonight) ISSUED AT 237 AM CDT Fri Jun 17 2022 A weak frontal boundary remained draped across the CWA as of very early Fri morning, positioned roughly along or just north of the I- 72 corridor at 05z/12am. West of the area, thunderstorms developed late Thursday night/very early Fri morning along a tight low level (925mb, 850mb) moisture gradient located from SW Nebraska into far southern IA. RAP analysis suggests this gradient, and the sfc front, will gradually shift southward during the pre-dawn hours, resulting in the existing convection taking on a southeastward trajectory. That puts existing storms on a path to clip the southwest portions of the CWA, likely between 3-8 AM, and within the last few minutes additional storms began developing along a Schuyler to Christian Co. line. While deep layer shear will be marginal, around 30 knots, ample elevated instability will support the potential for scattered strong wind gusts and isolated hail. Locally heavy rainfall is also a concern, as PWAT values are near 2" and radar estimates across southern IA show areas where 3+ inches of rain have fallen. Storms are expected to be fairly progressive as they drop southeast though, which should limit the flash flooding potential. Storms should depart the CWA no later than mid-morning, and once they do a relatively quiet weather day is anticipated. Cloud cover will diminish into the afternoon, as a broad sfc high pressure over Canada nudges toward the upper Great Lakes. Winds will take on a northerly component today, and dewpoints start to lower with the front having moved off to the south. It will still be warm, but temperatures will be closer to normal, with highs in the mid to upper 80s and overnight lows in the low 60s. && .LONG TERM...(Saturday through Thursday) ISSUED AT 237 AM CDT Fri Jun 17 2022 Saturday looks like the nicest day in the forecast, as strong sfc high pressure over the Great Lakes results in northeasterly winds across central IL, which will continue to advect lower dewpoint air in to the area. Afternoon dewpoints in the 50s will feel quite refreshing compared to the 70s dewpoints earlier this week. Mostly sunny skies and relatively light winds (less than 10 mph) will make it a seasonable summer day, with highs in the low 80s. The upper level pattern will be very amplified by Saturday, with a significant upper level ridge positioned to the west of our area, across the eastern Great Plains. Unfortunately, with that ridge looming upstream, any reprieve from the heat will be short-lived, and indeed 850mb temps are expected to climb from the mid-teens (degC) on Saturday to around +23 degC by Tuesday. High temperatures return to the 90s by Monday, and likely stay there through at least the upcoming work week, and possibly beyond. The CPC 8-14 day outlook (valid June 24-30) strongly favors above normal temperatures across the Midwest, and normal high temperatures for late June are in the mid to upper 80s. Circling back to the upcoming week, conditions don't look too oppressive for Monday. While highs are expected to be in the low 90s, dewpoints stay in the 60s, which would keep heat indices below 100. Tuesday is more concerning, with highs expected to push into the upper 90s, and some guidance suggesting highs in the triple digits. Dewpoints near or into the 70s could result in heat indices approaching 105, possibly requiring a heat advisory if that forecast holds. Into the latter half of the work week, a shortwave moving through the northern Plains will flatten the ridge somewhat, although high 500-mb heights will remain anchored across the southern MS Valley. There is the potential for a few upper disturbances to move along the northern periphery of the flattened ridge, potentially bringing precip/storms to central IL sometime in the Wed/Thur timeframe. Confidence is quite low at this range, however, and only slight chance PoPs are included in the forecast. With precip chances few and far between, abnormally dry conditions expanding across east- central IL, and another prolonged stretch of well-above normal temperatures, the possibility of at least some drought development is increasing. && .AVIATION...(For the 06Z TAFS through 06Z Friday night) Issued at 1140 PM CDT Thu Jun 16 2022 VFR conditions will prevail at all TAF sites next 24hrs. Scattered cirrus will prevail at most sites overnight. However, a complex of storms that has developed over eastern and southeast Nebraska will move east to southeast toward the state. Most HiRes models bring parts of this complex into west central IL toward morning, about 10-11z. Based on current guidance, looks like SPI will be the only site to see any convection. So, will have VCTS for now at SPI later than first thought. All other sites will have overcast cirrus or a mix of mid and high clouds during the morning hours. Skies should clear from north to south from late morning through early afternoon. Clear skies expected into the evening hours. Winds will be light and variable overnight and then be relatively light out of the northwest during the day...then light and variable again tomorrow evening. && .ILX WATCHES/WARNINGS/ADVISORIES... NONE. && SYNOPSIS...Erwin SHORT TERM...Erwin LONG TERM...Erwin AVIATION...Auten
Hazardous Weather Outlook National Weather Service Lincoln IL 331 PM CDT Thu Jun 16 2022 ILZ027>031-036>038-040>046-171700- Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean-Schuyler- Mason-Logan-De Witt-Piatt-Champaign-Vermilion- 331 PM CDT Thu Jun 16 2022 This Hazardous Weather Outlook is for central Illinois, east central Illinois and west central Illinois. .DAY ONE...This afternoon and tonight. There is a chance for thunderstorms, mainly south of I-74 and primarily overnight. If storms move into the area, some could be severe producing damaging winds and large hail. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Dangerously hot and humid conditions may return to the region next week. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed late this evening and overnight. ILZ047>057-061>063-066>068-071>073-171700- Cass-Menard-Scott-Morgan-Sangamon-Christian-Macon-Moultrie-Douglas- Coles-Edgar-Shelby-Cumberland-Clark-Effingham-Jasper-Crawford-Clay- Richland-Lawrence- 331 PM CDT Thu Jun 16 2022 This Hazardous Weather Outlook is for central Illinois, east central Illinois, southeast Illinois and west central Illinois. .DAY ONE...This afternoon and tonight. Dangerous heat and humidity will continue near and south of I-72 through this evening. Heat indices are expected to peak between 100 and 105 degrees today. There is a chance for thunderstorms, primarily overnight. If storms move into the area, some could be severe producing damaging winds and large hail. An isolated tornado cannot be ruled out. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. A few strong to severe storms may linger Friday morning. Dangerously hot and humid conditions may return to the region next week. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed late this evening and overnight. AAT
The Lincoln radar (KILX), 100 km away, was scanning. The volume nearest the first event began at 08:34 UTC.
53 thunderstorm wind, 8 flash flood, 3 hail, 1 tornado. Local standard time, as filed.
A few trees and tree branches were blown down at Turtle Lake.
Several trees and power poles were blown down across Rushville. One tree fell onto a trailer causing substantial damage, while another large tree limb damaged the roof of a house.
Several 3 to 4-inch diameter tree branches were blown down.
Several large trees were blown down along Route 100.
Tree limbs were blown down.
Tree limbs were blown down.
Numerous large trees were blown down across southern Sangamon County, mainly south of I-72.
A stationary semi truck was blown over.
Numerous trees were blown down in Winchester, some of which were broken in half.
Tree limbs were blown down.
Corn crops were flattened due to strong winds.
A large tree was blown down, crushing a fence.
Power lines were blown down near Lanphier High School and in the Northgate Subdivision.
Numerous trees were blown down.
Multiple 4-inch diameter tree limbs were broken off.
Shingles were stripped off a roof and several 2-inch diameter tree limbs were blown down.
Power poles were blown over.
Numerous large tree limbs were blown down.
Widespread tree damage with numerous large trees blown down.
Numerous trees and power lines were blown down.
Corn crops were flattened by strong winds.
Several streets were flooded in Pana.
Power lines were blown down.
Apple Creek spilled out of its banks and flowed across Route 111 southwest of Waverly.
Water was flowing across Route 104 northwest of Franklin.
A tree was split in two and damaged power lines.
Numerous large trees and tree branches were blown down around Altamont. Some vehicle damage was reported due to falling branches. A garage door buckled in and the siding of a house was damaged. The most significant wind damage occurred along West Jefferson Avenue between 7th Street and 10th Street.
Lots of tree damage in and around Cowden.
Several large tree limbs were blown down.
A large tree was blown down and a swing set was toppled.
Several tree limbs and power lines were blown down.
A shed was damaged by strong winds.
Major wind damage to Blair's Processing Plant building.
Several power poles were blown down along Xenia and Iola Road.
Severe roof damage occurred to Zinks Building Center on Highway 45. Damage also occurred to the old Sheriff's Office Square.
A few trees were damaged.
A tree was blown down.
Several trees and power lines were blown down just north of Clay City and on the outskirts of town.
A large maple tree branch was blown down.
A large tree was blown down.
A semi truck was blown over on Dieterich Blacktop just north of Clay City.
Around 5 power poles were blown down along Route 45 in Flora.
Power poles were blown down along Route 45 near the Clay and Wayne County line.
Numerous trees were blown down.
Several power poles and power lines were blown down.
A tornado touched down on Deer Farm Lane near North Passport Road 1 mile south-southeast of Passport at 6:36 AM CDT. The tornado knocked down multiple power poles, then tracked east-southeastward causing periodic tree damage and damage to the roofing of a barn. The tornado dissipated near the intersection of County Road 1300 North and North Higgin Switch Road about 4.5 miles northwest of Olney at 6:44 AM CDT.
Several large tree branches and power lines were blown down on East Deer Farm Lane.
Numerous large tree branches were blown down and porch chairs were tossed throughout a yard.
Grain bins were damaged by strong winds.
Several small tree limbs were blown down.
Several trees were blown down.
A large tree branch was broken.
Several large tree branches and power lines were blown down.
Water was flowing across US-40 and US-45 in Effingham.
A few trees were blown down.
The Fayette Avenue underpass in Effingham was closed due to high water.
A hollow oak tree blew down onto power lines causing a power outage.
Water was flowing across 1710th Street northwest of Teutopolis. Both bridges were underwater.
A few small branches were blown down near Walmart.
Water was flowing across Route 32 south of Stewardson.
Water was flowing across Route 128 north of Cowden.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2022Every state in 2022This day in weather historyThe tornado archive for Illinois, 2022Warnings in Illinois, June 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: 1031550, 1031496, 1031561, 1031497, 1031472, 1031498, 1031500, 1031518, 1031473, 1031474, 1031504, 1031512, 1031522, 1031541, 1031555, 1031547, 1031598, 1031601, 1031565, 1031603, 1031584, 1031515, 1031572, 1031614, 1031452, 1031519, 1031460, 1031462, 1031520, 1031539, 1031582, 1031600, 1031570, 1031525, 1031586, 1031593, 1031595, 1031597, 1031527, 1031529, and more.