A large low pressure system moved into the region and continued to deepen as it moved across Minnesota, becoming the most intense storm on record in the |Midwest on October 26, 2010. A squall line formed in the highly sheared warm sector ahead of a strong cold front associated with the intense system.
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 DVN wrote it up.
A large low pressure system moved into the region and continued to deepen as it moved across Minnesota, becoming the most intense storm on record in the |Midwest on October 26, 2010. A squall line formed in the highly sheared warm sector ahead of a strong cold front associated with the intense system. This line of storms swept rapidly eastward across extreme eastern Iowa into Illinois during the early morning hours. There were some reports of trees and power lines down from the thunderstorms across northwest Illinois, with wind gusts around 60 mph.
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 Quad Cities, IA wrote its last area forecast discussion before the first event at Oct 26, 2:35 AM CST, 1 hour 39 minutes earlier.
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</html>HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 445 AM CDT TUE OCT 26 2010 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-270945- BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON- HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL- WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON- WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK- 445 AM CDT TUE OCT 26 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST MISSOURI. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL EXIT THE AREA EARLY THIS MORNING AHEAD OF COLD FRONT THAT IS SWEEPING ACROSS THE UPPER MIDWEST. A FEW OF THESE THUNDERSTORMS WILL HAVE THE POTENTIAL TO PRODUCE DAMAGING WINDS...MAINLY ALONG AND EAST OF THE MISSISSIPPI RIVER. THE RISK FOR THUNDERSTORMS IS EXPECTED TO END BY MID MORNING. FOR THE REMAINDER OF THE DAY...THE PRIMARY WEATHER CONCERN WILL BE INCREASING WINDS. BY LATE MORNING...THE SUSTAINED WIND IS EXPECTED TO REACH 30 TO 40 MPH. BY AFTERNOON...WIND GUSTS OF 50 TO 60 MPH WILL BE POSSIBLE...PARTICULARLY ALONG AND NORTH OF HIGHWAY 34. THIS INCLUDES THE INTERSTATE 80 CORRIDOR...INTERSTATE 88...AND INTERSTATE 380...AS WELL AS HIGHWAYS 20...30...AND 61. WIND SPEEDS WILL RELAX SOMEWHAT TONIGHT...ALTHOUGH CONDITIONS WILL REMAIN BREEZY. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY AGAIN ON WEDNESDAY...THE WIND WILL BE THE PRIMARY CONCERN. SHORTLY AFTER SUNRISE WIND SPEEDS ARE ONCE AGAIN EXPECTED TO INCREASE TO 30 TO 40 MPH WITH STRONGER GUSTS LIKELY. .SPOTTER INFORMATION STATEMENT... THERE IS A CHANCE OF SPOTTER ACTIVATION EARLY THIS MORNING... MAINLY ALONG AND EAST OF THE MISSISSIPPI RIVER. 33
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</html>The Quad Cities radar (KDVN), 104 km away, was scanning. The volume nearest the first event began at 10:14 UTC.
8 thunderstorm wind. Local standard time, as filed.
Law enforcement reported a tree down on Route 6 east of Princeton.
Law enforcement reported a power pole down near Depue.
Law enforcement reported a tree down near Ottville.
Law enforcement reported a tree down at Arlington.
Law enforcement reported a power pole down near Ladd.
Law enforcement reported a tree down just south of Thomson.
Law enforcement reported power lines down near Chadwick.
Law enforcement reported power lines down near Shannon.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2010Every state in 2010This day in weather historyWarnings in Illinois, October 2010
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 2026-09-30. Each event’s entry at NCEI: 262788, 262789, 262790, 262791, 262792, 262793, 262794, 262795.