Lightning struck a tree which then fell onto a car in Marengo, IA at 130 am CDT June 21. This report was relayed by KCRG-TV.
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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 DVN wrote it up.
Lightning struck a tree which then fell onto a car in Marengo, IA at 130 am CDT June 21. This report was relayed by KCRG-TV.
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 Jun 20, 9:23 PM CST, 3 hours 7 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1023 PM CDT MON JUN 20 2011
.UPDATE...
LARGE SQUALL LINE /QLCS/ CONTINUES TRACKING EWD. PRESSURE FALLS AND
FORCING SUPPORT LINE TO SLOWLY WEAKEN ON SOUTHERN END WITH BEST
COVERAGE AND RISK FOR SOME MARGINAL SEVERE (MAINLY WIND)
NORTHWEST CWA BETWEEN 1 AM AND 4 AM. ALSO PRESSURE FALLS SUGGEST
SOME POTENTIAL FOR WARM ADVECTION WING TO DEVELOP IN ADVANCE OF
LINE ACROSS AREAS MAINLY ALONG AND NORTH OF HWY 30... AND BEST RISK
OF HEAVY RAINS THERE WITH REPEATED STORMS. DID LEAVE FLASH FLOOD
WATCH INTACT THOUGH COVERAGE AND SPEED OF MOVEMENT TO LIKELY KEEP
ANY HEAVY RAIN VERY LOCALIZED IN WATCH AREA.
&&
.DVN WATCHES/WARNINGS/ADVISORIES...
IA...FLASH FLOOD WATCH THROUGH TUESDAY AFTERNOON FOR DES MOINES-HENRY
IA-JEFFERSON-KEOKUK-LEE-LOUISA-VAN BUREN-WASHINGTON.
IL...FLASH FLOOD WATCH THROUGH TUESDAY AFTERNOON FOR BUREAU-HANCOCK-
HENDERSON-HENRY IL-MCDONOUGH-MERCER-PUTNAM-WARREN.
MO...FLASH FLOOD WATCH THROUGH TUESDAY AFTERNOON FOR CLARK-SCOTLAND.
&&HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 429 PM CDT MON JUN 20 2011 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-212130- 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- 429 PM CDT MON JUN 20 2011 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...TONIGHT TONIGHT...THUNDERSTORMS WILL AGAIN BE LIKELY WITH SOME STORMS PRODUCING HEAVY RAINFALL. RAINFALL OF 1 TO 4 INCHES IS POSSIBLE. A FLASH FLOOD WATCH IS IN EFFECT FOR LOCATIONS SOUTH OF INTERSTATE 80 THIS EVENING AND TUESDAY MORNING. A SECONDARY THREAT WILL BE ISOLATED SEVERE STORMS WITH LARGE HAIL UP TO THE SIZE OF QUARTERS AND STRAIGHT LINE WINDS UP TO 60 MPH. AREA RIVERS ARE EXPERIENCING FLOODING. PLEASE SEE THE LATEST FLOOD STATEMENTS AND FLOOD WARNINGS FOR DETAILS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY TUESDAY...STRONG TO SEVERE STORMS ARE LIKELY...MAINLY DURING THE AFTERNOON AND EVENING. THE PRIMARY RISK APPEARS TO BE LARGE HAIL...DAMAGING STRAIGHT LINE WINDS AND A FEW TORNADOES. MORE LOCALLY HEAVY RAINFALL MAY RESULT IN ADDITIONAL RIVER FLOODING AND LOCALIZED FLASH FLOODING DUE TO ALREADY SATURATED SOILS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TONIGHT. ANY REPORTS OF HEAVY RAINFALL GREATER THAN 1 INCH WOULD BE APPRECIATED. HAASE
The Quad Cities radar (KDVN), 125 km away, was scanning. The volume nearest the first event began at 06:32 UTC.
1 lightning. Local standard time, as filed.
Lightning struck a tree which then fell onto a car in Marengo, IA at 130 am CDT June 21. This report was relayed by KCRG-TV.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2011Every state in 2011This day in weather historyWarnings in Iowa, June 2011
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: 320334.