Iowa, 2011Damaging Winds and Lightning Strike in Iowa, July 11, 2011
July 11, 2011 · NWS DVN · 56 events in 10 counties and zones
Mostly cloudy skies and above normal temperatures were seen across eastern Iowa, northwest Illinois, and northeast Missouri during the early morning hours on July 11. Showers and thunderstorms moved across east central Iowa into northern Illinois between 4 am CDT and 7 am CDT, with many areas seeing damaging winds in excess of 70 mph.
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
Open the live radar over this ground
- Deaths
- 0
- Injuries
- 0
- Property damage
- $3.2 million
- Crop damage
- None recorded
- Events
- 56
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.
Mostly cloudy skies and above normal temperatures were seen across eastern Iowa, northwest Illinois, and northeast Missouri during the early morning hours on July 11. Showers and thunderstorms moved across east central Iowa into northern Illinois between 4 am CDT and 7 am CDT, with many areas seeing damaging winds in excess of 70 mph. Widespread damage was seen from Vinton, IA to Dubuque, IA, with numerous downed power lines and large trees blown down. Morning low temperatures ranged from 68 degrees in Cedar Rapids, IA to 81 degrees in Macomb, IL.
What forecasters said that day
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 Jul 11, 2:20 AM CST, 1 hour 10 minutes earlier.
Area forecast discussion, Jul 11, 2:20 AM CST, 1 hour 10 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
320 AM CDT MON JUL 11 2011
.SYNOPSIS...
AMPLE CAPE...AND TYPICALLY WEAK FORCING IS FOUND OVER THE MIDWEST
EARLY TODAY. TWO LARGE MCS HAVE MOVE TO OUR NORTH AND THROUGH THE
WEST SO FAR...AND HAVE BECOME MATURED TO DISSIPATED. AS THE POINT
WHERE OUTFLOWS FROM THESE TWO HAVE COLLIDED...OVER NORTHERN/NORTHWEST
IOWA THROUGH WESTERN IOWA...NEW INTENSE STORMS HAVE FORMED. THIS WILL
BECOME THE MAIN MCS FOR THE REST OF THIS MORNING...AND THIS SHOULD
AFFECT OUR CWA.
&&
.SHORT TERM...TODAY AND TONIGHT...
THE MCS...POSSIBLY WITH SEVERE WINDS...SHOULD MOVE EAST OVER IOWA
INTO OUR CWA DURING THE NEXT SEVERAL HOURS. FORWARD PROPAGATING
CORFIDI VECTORS SHOW STORMS MOVEMENT EAST AROUND 35 KTS THROUGH MID
MORNING...WITH SOME INCREASE TOWARD 45 KTS TOWARD 18Z. MU CAPE IS
AROUND 5000 J/KG. THERE IS PLENTY OF ENERGY FOR STORMS...BUT AS
MENTIONED BEFORE...THE FORCING IS BASICALLY ONLY ON THE MESOSCALE
LEVEL. THUS...THE CONVERGENCE OF OUTFLOW BOUNDARY ARE AIMED AT OUR
NORTH 1/2 AT THIS TIME...AND WILL FOCUS THE 50 TO 60 PERCENT CHANCE
THERE AFTER 12Z...WITH LOWER CHANCES TO THE SOUTH. CAPPING WILL ALSO
BE OCCURRING TODAY...SETTING UP A VERY LOW CONFIDENCE FORECAST IN
THE AFTERNOON. THE BOUNDARY WILL BE IN PLACE...WITH VERY HIGH CAPE
AVAILABLE FOR STORMS. ANY STORM THAT FORMS WILL LIKELY BE STRONG TO
SEVERE...BUT FORCING IS WEAK OR NON EXISTENT. THUS POPS WILL BE LOW
THIS AFTERNOON...AND SLIGHT TONIGHT.
HOT AND HUMID AIR WILL BE LIKELY SOUTH OF INTERSTATE 80...AND AN
ADVISORY WILL BE IN EFFECT THROUGH THIS EVENING. HEAT INDEXES LIKE
YESTERDAY...WILL EXCEED 100 TO 105. FARTHER NORTH...CONVECTION AND
CLOUDS ARE LIKELY TO KEEP HEAT INDEXES A BIT COOLER...AND TODAY WILL
JUST BE A VERY WARM AND STICKY DAY. DEWPOINTS TODAY WILL BE IN THE
MID TO UPPER 70S AGAIN. ..ERVIN..
.LONG TERM...TUESDAY THROUGH SUNDAY...
TUESDAY INTO WEDNESDAY...LATEST SUITE OF 00Z RUN MODELS STILL
GENERALLY SUGGEST SEASONABLY STRONG SFC HIGH TO BUILD OUT OF CANADA
AN ACRS THE NORTHEAST PLAINS/UPPER MS RVR VALLEY AND EFFECTIVELY
SHUNT THE MAIN SFC-LLVL BOUNDARY SOUTH OF THE CWA THIS PERIOD...
WITH IT LIKELY LAYING OUT FROM WEST-TO-EAST ACRS NORTHERN KS INTO
CENTRAL MO AND SOUTH CENTRAL IA BY LATE TUE NIGHT. CONFIDENCE NOT
HIGH BUT WILL HAVE TO GO WITH LOW TO MODERATE POPS ON TUE FOR
OVERRUNNING SHOWERS AND POSSIBLY A FEW STORMS...BUT NO REAL
ORGANIZED FORCING EVIDENT AT THIS TIME. POST-FRONTAL FETCH AND SOME
CLOUD DEBRIS WILL MAKE FOR A BIT COOLER AND LESS HUMID DAY ACRS
MOST OF THE LOCAL CWA...EXCEPT THE FAR SOUTHERN CWA MAY STILL BE
IMPACTED BY HIGH SFC DPT POOL. THUS DEPENDING ON EXTENT OF
CONVECTION AND ASSOCIATED DEBRIS...HEAT ADVISORY CRITERIA MAY BE
APPROACHED OR EXCEEDED AGAIN IN THE FAR SOUTHERN TIER OR TWO OF
COUNTIES TUE AFTERNOON. ENOUGH OF A LLJ AND ELEVATED THTA-E FEED
SIGNAL UNDER PERIPHERY OF RIGHT ENTRANCE REGION OF PASSING GRT LKS
UPPER JET STREAK...TO SUPPORT AND ELEVATED TYPE OF MCS TUE NIGHT AT
LEAST ACRS THE SOUTHERN THIRD OF THE DVN CWA...OR MAYBE UP TO I80.
SEVERAL MEDIUM RANGE MODELS APPEAR TO BE INITIATING THEIR MAIN
PRECIP REGIONS TOO FAR NORTH TUE NIGHT OVER THE CENTRAL OR EVEN
NORTHERN CWA...AND WILL ADJUST SOUTHWARD BOTH HIGHER POPS AND QPF
AMOUNTS. FORCING AND THERMODYNAMICS AT THIS POINT APPEAR TO BE
NOTHING SPECTACULAR TO SUPPORT MUCH OF A SVR RISK TUE NIGHT
ESPECIALLY TAKING INTO ACCOUNT THE ELEVATED NATURE OF ANY CONVECTIVE
SYSTEM THAT MAY BE ABLE TO INITIATE AND MAKE IT ACRS THE LOCAL
FCST AREA. BOTH SFC AND UPPER RIDGE AMPLIFICATION ACRS THE UPPER MS
RVR VALLEY INTO THE WESTERN GRT LKS MAY MAKE FOR A MAINLY DRY WED
AND WED NIGHT...BUT WILL KEEP LOW CHC POPS IN THE SOUTHWEST FOR
LINGERING OVERRUNNING PRECIP WED MORNING. MUCH COOLER HIGHS LOOK TO
BE IN STORE FOR WED WITH VALUES IN THE UPPER 70S TO LOW/MID 80S...
WITH AN EVEN BIGGER COMFORT LEVEL IMPACT OF NORTHEASTERLY BOUNDARY
LAYER FETCH DOWN-DRYING THE SFC DPTS. SOME AREAS IN THE
NORTHEASTERN CWA MAY COOL WELL DOWN INTO THE 50S BY EARLY THU
MORNING.
THURSDAY AND FRIDAY...LATEST ENSEMBLES AND LOOKING AT 00Z RUN GFS
AND ECMWF GENERALLY SUGGEST THAT THE THERMAL RIDGE TO TRY AND
REESTABLISH ALONG AND WEST OF THE DVN FCST AREA THIS PERIOD. THUS
THERMALLY MODERATING TEMPS LOOK TO BE IN STORE ESPECIALLY BY
FRIDAY. IT ALSO LOOKS MAINLY DRY...BUT THE RISK OF RIDGE-RIDING MCS/S
IN A REINVIGORATED RING OF FIRE PATTERN FROM THE CENTRAL PLAINS TO
THE NORTHWEST GRT LKS TOO CLOSE FRO COMFORT TO GO TOTALLY DRY
ESPECIALLY IN THE NORTHERN CWA. WILL GO WITH SLIGHT CHC POPS IN THE
NORTH FOR THU NIGHT INTO FRI WITH MCS TRACK DEPICTED BY THE LATEST
RUNS ACRS THE EASTERN DAKOTAS...TO MICHIGAN.
SATURDAY AND SUNDAY...LATEST LONG RANGE SIGNALS SUGGEST OPPRESSIVE
HEAT DOME COULD REALLY ESTABLISH ACRS MUCH OF THE MID AND UPPER MS
RVR VALLEY OVER THE UPCOMING WEEKEND. SFC DPTS RISING TO LEVELS
SIMILAR TO WHAT OCCURRED EARLIER TODAY/MID AND UPPER 70S/ COMBINED
WITH AMBIENT HIGHS IN THE 90S SUGGEST HEAT ADVISORY TO WARNINGS
POSSIBLE BOTH SAT AND ESPECIALLY SUNDAY. RING OF FIRE LOOKS TO
BE SHUNTED EVEN FURTHER NORTH AND NORTHEAST FOR A DRY FCST. ..12..
&&
.AVIATION...
MVFR VISIBILITY WILL BE LIKELY THROUGH TODAY AND TONIGHT...AND A
VERY HUMID AIRMASS IN IN PLACE. SOME OCCASIONAL IFR VISIBILITIES ARE
POSSIBLE THROUGH 13Z TODAY. THE BROAD RANGE WILL BE 2 TO 5 MILES
THROUGH 13Z...THEN 4 TO 6 MILES THROUGH TODAY IN HAZE. A LARGE AREA
OF THUNDERSTORMS MAY IMPACT ALL SITES BETWEEN 10Z AND 18Z TODAY...
WITH AN ISOLATED THUNDERSTORM POSSIBLE AFTER 18Z TODAY AND TONIGHT.
WINDS WILL BE LIGHT AND VARIABLE OUTSIDE OF STORMS. CIGS WILL BE
VARIABLE FROM 3500 FT...TO 10000 FT TODAY...WITH ANY LOWER CIG
ASSOCIATED WITH PASSING STORMS. THERE IS A CHANCE FOR WINDS TO GUST
OVER 30 KTS WITH EARLY MORNING STORMS PRIOR TO 13Z TODAY...BUT THIS
THREAT APPEARS LOW AT THIS TIME. ..ERVIN..
&&
.DVN WATCHES/WARNINGS/ADVISORIES...
IA...HEAT ADVISORY UNTIL 10 PM CDT THIS EVENING FOR DES MOINES-HENRY
IA-JEFFERSON-KEOKUK-LEE-LOUISA-VAN BUREN-WASHINGTON.
IL...HEAT ADVISORY UNTIL 10 PM CDT THIS EVENING FOR HANCOCK-
HENDERSON-MCDONOUGH-MERCER-WARREN.
MO...HEAT ADVISORY UNTIL 10 PM CDT THIS EVENING FOR CLARK-SCOTLAND.
&&
ERVIN/12Hazardous weather outlook, Jul 11, 3:02 AM CST, 28 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
402 AM CDT MON JUL 11 2011
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-120915-
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-
402 AM CDT MON JUL 11 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...TODAY AND TONIGHT
THUNDERSTORMS WITH DAMAGING WINDS ARE LIKELY THIS MORNING...AS A
LINE OF STRONG TO SEVERE STORMS MOVE EAST QUICKLY MOVES FROM
CENTRAL IOWA THROUGH NORTHERN ILLINOIS. WINDS OF 50 TO 70 MPH
APPEAR LIKELY WITH THESE STORMS...AS WELL AS TORRENTIAL RAINFALL
FOR A SHORT PERIOD. AFTER THESE STORMS PASS...THERE IS A LOW
THREAT FOR STRONG TO SEVERE STORMS THIS AFTERNOON AND TONIGHT...AS
A FRONT REMAINS STATIONARY OVER THE REGION.
DANGEROUSLY HOT AND HUMID WEATHER IS EXPECTED TODAY...ESPECIALLY
SOUTH OF INTERSTATE 80. WHILE CLOUDS AND RAIN MAY KEEP
TEMPERATURES DOWN ALONG AND NORTH OF THE INTERSTATE 80
CORRIDOR...LOCATIONS TO THE SOUTH SHOULD SEE HIGHS IN THE LOWER
90S...WITH HEAT INDEXES FROM 100 TO 105...AND LOCALLY OVER 105
POSSIBLE. A HEAT ADVISORY IS IN EFFECT FOR THIS AREA...THROUGH MID
EVENING.
.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
DANGEROUS HEAT INDICES OF AROUND 100 DEGREES MAY OCCUR AGAIN
SOUTH OF INTERSTATE 80 TUESDAY AFTERNOON.
ANOTHER ROUND OF THUNDERSTORMS WILL BE POSSIBLE TUESDAY NIGHT
ACROSS PORTIONS OF THE OUTLOOK AREA...WITH CURRENT INDICATIONS
SUGGESTING AREAS ALONG AND SOUTH OF INTERSTATE 80 MORE FAVORABLE
TO EXPERIENCE THIS ACTIVITY. THE STORM PREDICTION HAS PLACE AREAS
GENERALLY ALONG AND SOUTH OF INTERSTATE 80 IN A SLIGHT RISK FOR
SEVERE WEATHER LATE TUESDAY AND ESPECIALLY TUESDAY NIGHT.
AFTER A BRIEF REPRIEVE DURING THE MID TO LATE WEEK PERIOD...MORE
OPPRESSIVE HEAT MAY AGAIN BUILD ACROSS THE AREA NEXT WEEKEND.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NEEDED THIS MORNING...MAINLY ALONG AND NORTH
OF INTERSTATE 80. ACTIVATION IS POSSIBLE THIS AFTERNOON AND
TONIGHT...BUT IS MUCH LESS LIKELY.
ERVIN/12
Thunderstorm Wind, Benton
- When
- July 11, 3:30 AM CST
- Where
- Benton County, 0.23 mi SSE of Belle Plaine
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $25,000
- Reported by
- Newspaper
- Coordinates
- 41.897, -92.278
Wind gusts estimated to be 70 mph downed numerous trees and power lines in Belle Plaine, IA around 430 am CDT July 11. The north side of town was hardest hit. Some properties was damaged by the fallen trees.
Thunderstorm Wind, Benton
- When
- July 11, 3:45 AM CST
- Where
- Benton County, 0.73 mi SW of Van Horne to 1.11 mi SSW of Van Horne
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $2,000
- Reported by
- Newspaper
- Coordinates
- 42.014, -92.091
Wind gusts estimated to be 70 mph bent a light pole over about 30 degrees from vertical on Main Street in Van Horne, IA around 445 am CDT July 11.
Thunderstorm Wind, Benton
- When
- July 11, 3:49 AM CST
- Where
- Benton County, 3.3 mi SE of Keystone
- Measured
- 65 kt (75 mph) measured gust
- Reported by
- Trained Spotter
- Coordinates
- 41.970, -92.150
A 75 mph wind gust was recorded 3 miles southeast of Keystone, IA at 449 am CDT July 11.
Thunderstorm Wind, Benton
- When
- July 11, 3:50 AM CST
- Where
- Benton County, 0.51 mi E of Belle Plaine
- Measured
- 52 kt (60 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 41.900, -92.270
Wind gusts estimated to be 60 mph were observed in Belle Plaine, IA at 450 am CDT July 11.
Thunderstorm Wind, Benton
- When
- July 11, 3:55 AM CST
- Where
- Benton County, 0.33 mi SSE of Garrison to 0.8 mi SE of Garrison
- Measured
- 104 kt (120 mph) estimated gust
- Property damage
- $1.0 million
- Reported by
- Newspaper
- Coordinates
- 42.145, -92.148
Wind gusts estimated to be 120 mph caused significant damage in Garrison, IA around 455 am CDT July 11. The fire station was destroyed. The roof of the library blew off. About 80 percent of the structures in town were damaged with significant damage to about 20 percent of them.
Thunderstorm Wind, Benton
- When
- July 11, 3:58 AM CST
- Where
- Benton County, 0.69 mi S of Vinton
- Measured
- 56 kt (64 mph) estimated gust
- Reported by
- Emergency Manager
- Coordinates
- 42.160, -92.030
Wind gusts estimated to be 65 mph were observed in Vinton, IA at 458 am CDT July 11.
Thunderstorm Wind, Benton
- When
- July 11, 4:00 AM CST
- Where
- Benton County, 0.69 mi S of Vinton
- Measured
- 61 kt (70 mph) measured gust
- Reported by
- Emergency Manager
- Coordinates
- 42.160, -92.030
Wind gusts estimated to be at least 70 mph were observed in Vinton, IA at 500 am CDT July 11.
Thunderstorm Wind, Benton
- When
- July 11, 4:00 AM CST to 4:12 AM CST
- Where
- Benton County, 0.69 mi S of Vinton
- Measured
- 52 kt (60 mph) measured sustained
- Reported by
- Emergency Manager
- Coordinates
- 42.160, -92.030
Sustained winds of 60 mph were recorded in Vinton, IA from 500 am until 512 am CDT July 11.
Thunderstorm Wind, Benton
- When
- July 11, 4:00 AM CST
- Where
- Benton County, 0.57 mi SSW of Vinton to 0.91 mi ENE of Vinton
- Measured
- 104 kt (120 mph) estimated gust
- Property damage
- $1.0 million
- Reported by
- Newspaper
- Coordinates
- 42.162, -92.033
Wind gusts estimated to be 120 mph caused significant damage throughout the town of Vinton, IA at 500 am CDT July 11. Hundreds of trees and power lines were blown down throughout the area and several cars and buildings were damaged. The Iowa Braille and Sight Saving School was heavily damaged. The Old Main building on campus will need a new roof. A smokestack at the hospital was blown off punching a gaping hole in the side of the rehabilitation center. Several buildings in Vinton sustained massive damage, including the A.S.A.C. building, Kruger's Barber Shop, the Pioneer Seed building, Mickey's Bar, Phillips funeral home and the Hummel Apartments.
Thunderstorm Wind, Benton
- When
- July 11, 4:01 AM CST
- Where
- Benton County, 1.66 mi S of Vinton Meml Arpt
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $25,000
- Reported by
- Emergency Manager
- Coordinates
- 42.196, -92.018
Wind gusts estimated to be 70 mph blew a semi truck off Highway 150 just north of Vinton, IA at 501 am CDT July 11.
Thunderstorm Wind, Benton
- When
- July 11, 4:03 AM CST
- Where
- Benton County, Keystone
- Measured
- 61 kt (70 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 42.000, -92.200
Wind gusts estimated to be 70 mph blew down several large trees in Keystone, IA around 503 am CDT July 11. Some crop damage was also observed.
Thunderstorm Wind, Benton
- When
- July 11, 4:05 AM CST
- Where
- Benton County, 0.69 mi S of Vinton
- Measured
- 70 kt (81 mph) estimated gust
- Property damage
- $10,000
- Reported by
- Trained Spotter
- Coordinates
- 42.160, -92.030
Wind gusts estimated to be 80 mph blew a 2 by 4 piece of lumber through a wall of a home knocking the television over in Vinton, IA around 505 am CDT July 11.
Thunderstorm Wind, Linn
- When
- July 11, 4:05 AM CST
- Where
- Linn County, 3.49 mi S of Cedar Rapids
- Measured
- 52 kt (60 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 41.950, -91.660
Wind gusts estimated to be 60 mph were observed 1 mile south southeast of Cedar Rapids, IA at 505 am CDT July 11.
Thunderstorm Wind, Linn
- When
- July 11, 4:09 AM CST
- Where
- Linn County, 1.47 mi NNW of Marion
- Measured
- 52 kt (60 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 42.050, -91.610
Wind gusts estimated to be 55 to 60 mph were observed 1 mile northwest of Marion, IA at 509 am CDT July 11.
Thunderstorm Wind, Linn
- When
- July 11, 4:10 AM CST
- Where
- Linn County, 3.74 mi SW of Center Pt to 2.4 mi SSW of Center Pt
- Measured
- 61 kt (70 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 42.156, -91.821
Wind gusts estimated to be 70 mph blew down three trees across Lewis Access Rd about 3 miles southwest of Center Point, IA around 510 am CDT July 11. The road to the Cedar River bridge was blocked by the trees.
Thunderstorm Wind, Benton
- When
- July 11, 4:10 AM CST
- Where
- Benton County, 0.46 mi NNW of Urbana to 1.7 mi W of Urbana
- Measured
- 70 kt (81 mph) estimated gust
- Property damage
- $500,000
- Reported by
- Trained Spotter
- Coordinates
- 42.226, -91.874
Wind gusts estimated to be 80 mph ripped the roof off of the Urbana Elementary School in Urbana, IA around 510 am CDT July 11. Several other businesses were also damaged in the Becca Industrial Park, including Buresh Arch Millwork, Borlaug Systems, and PalTech Enterprises.
Thunderstorm Wind, Buchanan
- When
- July 11, 4:10 AM CST
- Where
- Buchanan County, 1.08 mi SW of Rowley
- Measured
- 61 kt (70 mph) estimated gust
- Reported by
- Newspaper
- Coordinates
- 42.370, -91.846
Wind gusts estimated to be 70 mph caused some tree damage in Rowley, IA around 510 am CDT July 11.
Thunderstorm Wind, Buchanan
- When
- July 11, 4:10 AM CST
- Where
- Buchanan County, 0.43 mi SSW of Brandon
- Measured
- 61 kt (70 mph) estimated gust
- Reported by
- Newspaper
- Coordinates
- 42.314, -92.004
Wind gusts estimated to be 70 mph caused some tree damage in Brandon, IA around 510 am CDT July 11.
Thunderstorm Wind, Linn
- When
- July 11, 4:11 AM CST
- Where
- Linn County, 3.49 mi S of Cedar Rapids
- Measured
- 70 kt (81 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 41.950, -91.660
Wind gusts estimated to be 80 mph were observed 1 mile south southeast of Cedar Rapids, IA at 511 am CDT July 11.
Thunderstorm Wind, Linn
- When
- July 11, 4:12 AM CST
- Where
- Linn County, 2.92 mi SE of Cedar Rapids
- Measured
- 61 kt (70 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 41.970, -91.610
Wind gusts estimated to be 70 mph were observed 3 miles east of Cedar Rapids, IA at 512 am CDT July 11.
Thunderstorm Wind, Benton
- When
- July 11, 4:14 AM CST
- Where
- Benton County, 0.6 mi NNE of Urbana
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $5,000
- Reported by
- Trained Spotter
- Coordinates
- 42.228, -91.867
Wind gusts estimated to be 70 mph blew down some interstate signs near the Sunset Street exit on Interstate 380 near Urbana, IA around 514 am CDT July 11. In addition, several 4 inch diameter trees were snapped off.
Thunderstorm Wind, Linn
- When
- July 11, 4:15 AM CST
- Where
- Linn County, 0.69 mi S of Center Pt
- Measured
- 61 kt (70 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 42.190, -91.780
Wind gusts estimated to be 70 mph blew down several large trees in Center Point, IA around 515 am CDT July 11.
Thunderstorm Wind, Benton
- When
- July 11, 4:15 AM CST
- Where
- Benton County, 0.51 mi W of Shellsburg
- Measured
- 70 kt (81 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 42.100, -91.880
Wind gusts estimated to be 80 mph were observed 1 mile northwest of Shellsburg, IA around 515 am CDT July 11.
Thunderstorm Wind, Benton
- When
- July 11, 4:16 AM CST
- Where
- Benton County, 2.02 mi E of Cheney to 1.44 mi ESE of Urbana
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $10,000
- Reported by
- Trained Spotter
- Coordinates
- 42.245, -91.891
Wind gusts estimated to be 70 mph blew eight small utility sized trailers over on Interstate 380 near Urbana, IA around 516 am CDT July 11. Some farm fields were also damaged or flattened in the vicinity.
Thunderstorm Wind, Linn
- When
- July 11, 4:20 AM CST
- Where
- Linn County, 3.81 mi SSW of Walker
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $20,000
- Reported by
- Trained Spotter
- Coordinates
- 42.231, -91.865
Wind gusts estimated to be 70 mph flipped a camper over at the Lazy Acres Campground near Urbana, IA around 520 am CDT July 11.
Thunderstorm Wind, Jones
- When
- July 11, 4:20 AM CST to 5:10 AM CST
- Where
- Jones County, 4.69 mi S of Martelle to 5.98 mi NE of Temple Hill
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $250,000
- Reported by
- Emergency Manager
- Coordinates
- 41.953, -91.357
Wind gusts estimated to be 60 to 70 blew down numerous trees across all of Jones County Iowa between 520 am and 610 am CDT July 11.
Thunderstorm Wind, Linn
- When
- July 11, 4:20 AM CST
- Where
- Linn County, 0.21 mi NNE of Mt Vernon to 0.3 mi W of Lisbon
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $5,000
- Reported by
- Newspaper
- Coordinates
- 41.923, -91.419
Wind gusts estimated to be 70 mph caused some tree damage in Mount Vernon, IA and Lisbon, IA around 520 am CDT July 11. The tree took out a utility pole resulting in a power outage.
Thunderstorm Wind, Benton
- When
- July 11, 4:21 AM CST
- Where
- Benton County, 0.69 mi S of Shellsburg
- Measured
- 70 kt (81 mph) estimated gust
- Property damage
- $100,000
- Reported by
- Emergency Manager
- Coordinates
- 42.090, -91.870
Wind gusts estimated to be 80 mph completely destroyed a metal building and blew over several roofs in Shellsburg, IA at 521 am CDT July 11.
Thunderstorm Wind, Linn
- When
- July 11, 4:23 AM CST
- Where
- Linn County, Toddville
- Measured
- 63 kt (72 mph) measured gust
- Reported by
- Emergency Manager
- Coordinates
- 42.100, -91.720
A 72 mph wind gust was recorded in Toddville, IA around 523 am CDT July 11.
Thunderstorm Wind, Linn
- When
- July 11, 4:24 AM CST
- Where
- Linn County, 1.87 mi S of Center Pt
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $25,000
- Reported by
- Fire Department/Rescue
- Coordinates
- 42.173, -91.778
Wind gusts estimated to be 70 mph blew a semi truck over at the Interstate 380 truck stop near Center Point, IA at 524 am CDT July 11.
Thunderstorm Wind, Linn
- When
- July 11, 4:24 AM CST
- Where
- Linn County, 0.69 mi S of Center Pt
- Measured
- 52 kt (60 mph) estimated gust
- Reported by
- Fire Department/Rescue
- Coordinates
- 42.190, -91.780
Wind gusts estimated to be over 60 mph were observed in Center Point, IA at 524 am CDT July 11.
Thunderstorm Wind, Linn
- When
- July 11, 4:24 AM CST
- Where
- Linn County, 1.24 mi SW of Palo
- Measured
- 61 kt (70 mph) estimated gust
- Reported by
- Fire Department/Rescue
- Coordinates
- 42.060, -91.800
Wind gusts estimated to be 70 mph were observed in Palo, IA around 524 am CDT July 11. This report was relayed by the emergency manager.
Thunderstorm Wind, Linn
- When
- July 11, 4:25 AM CST
- Where
- Linn County, Alburnett
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $25,000
- Reported by
- Emergency Manager
- Coordinates
- 42.150, -91.620
Wind gusts estimated to be 70 mph resulted in a power outage in Alburnett, IA at 525 am CDT July 11.
Thunderstorm Wind, Linn
- When
- July 11, 4:25 AM CST
- Where
- Linn County, Toddville
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $25,000
- Reported by
- Emergency Manager
- Coordinates
- 42.100, -91.720
Wind gusts estimated to be 70 mph resulted in several power outages in Toddville, IA at 525 am CDT July 11.
Thunderstorm Wind, Linn
- When
- July 11, 4:30 AM CST
- Where
- Linn County, 2.65 mi ENE of Walker
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $50,000
- Reported by
- Fire Department/Rescue
- Coordinates
- 42.290, -91.780
Wind gusts estimated to be 70 mph blew down several trees in Walker, IA at 530 am CDT July 11. Some cars were damaged.
Thunderstorm Wind, Jones
- When
- July 11, 4:35 AM CST
- Where
- Jones County, 0.3 mi SSE of Monticello Muni Arpt
- Measured
- 57 kt (66 mph) measured gust
- Reported by
- AWOS
- Coordinates
- 42.226, -91.167
A 66 mph wind gust was recorded by the AWOS at the Monticello Regional Airport at 535 am CDT July 11.
Thunderstorm Wind, Delaware
- When
- July 11, 4:37 AM CST
- Where
- Delaware County, 0.86 mi NW of Manchester
- Measured
- 56 kt (64 mph) estimated gust
- Reported by
- Emergency Manager
- Coordinates
- 42.490, -91.460
Wind gusts estimated to be 65 mph broke some windows in some homes in Manchester, IA at 537 am CDT July 11. Some power outages were also observed.
Thunderstorm Wind, Dubuque
- When
- July 11, 4:40 AM CST
- Where
- Dubuque County, 0.24 mi E of Dyersville to 0.75 mi E of Dyersville
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $1,000
- Reported by
- Newspaper
- Coordinates
- 42.480, -91.115
Wind gusts estimated to be 70 mph caused some tree damage in Dyersville, IA around 540 am CDT July 11. A fishing boat and fence were also damaged and utility lines were downed.
Thunderstorm Wind, Dubuque
- When
- July 11, 4:50 AM CST
- Where
- Dubuque County, 0.4 mi SSW of Asbury
- Measured
- 56 kt (64 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 42.514, -90.752
Wind gusts estimated to be 65 mph split a two foot diameter tree in half near Asbury, IA at 550 am CDT July 11.
Lightning, Cedar
- When
- July 11, 4:50 AM CST
- Where
- Cedar County, 0.63 mi N of Lowden
- Property damage
- $50
- Reported by
- Newspaper
- Coordinates
- 41.859, -90.928
Lightning split a tree in half in Lowden, IA around 550 am CDT July 11. A COOP observer contributed to this report.
Thunderstorm Wind, Jones
- When
- July 11, 4:54 AM CST
- Where
- Jones County, 3.49 mi S of Center Jct
- Measured
- 56 kt (64 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 42.070, -91.110
Wind gusts estimated to be 65 mph were observed 3 miles south southwest of Center Junction, IA at 554 am CDT July 11.
Thunderstorm Wind, Jones
- When
- July 11, 4:54 AM CST
- Where
- Jones County, 3.49 mi S of Center Jct
- Measured
- 56 kt (64 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 42.070, -91.110
Wind gusts estimated to be 65 mph snapped off the top half of a 12 inch diameter pine tree about 3 miles south southwest of Center Junction, IA at 554 am CDT July 11.
Thunderstorm Wind, Dubuque
- When
- July 11, 4:55 AM CST
- Where
- Dubuque County, 0.59 mi ENE of (Dbq)dubuque Muni Ar
- Measured
- 52 kt (60 mph) measured gust
- Reported by
- ASOS
- Coordinates
- 42.403, -90.709
A 60 mph wind gust was recorded by the ASOS at the Dubuque Regional Airport at 555 am CDT July 11.
Thunderstorm Wind, Clinton
- When
- July 11, 5:00 AM CST
- Where
- Clinton County, 0.86 mi SE of Charlotte
- Measured
- 61 kt (70 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 41.960, -90.470
Wind gusts estimated to be 70 mph blew down two large trees in Charlotte, IA at 600 am CDT July 11.
Thunderstorm Wind, Clinton
- When
- July 11, 5:00 AM CST
- Where
- Clinton County, 0.86 mi SE of Charlotte
- Measured
- 63 kt (72 mph) measured gust
- Reported by
- Trained Spotter
- Coordinates
- 41.960, -90.470
A 72 mph wind gust was recorded in Charlotte, IA at 600 am CDT July 11.
Thunderstorm Wind, Dubuque
- When
- July 11, 5:02 AM CST
- Where
- Dubuque County, 0.51 mi W of Asbury
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $25,000
- Reported by
- Trained Spotter
- Coordinates
- 42.520, -90.760
Wind gusts estimated to be 70 mph blew down some 12 inch diameter trees onto an outbuilding about 4 miles west northwest of Dubuque, IA at 602 am CDT July 11.
Thunderstorm Wind, Dubuque
- When
- July 11, 5:07 AM CST
- Where
- Dubuque County, 0.59 mi ENE of (Dbq)dubuque Muni Ar
- Measured
- 56 kt (64 mph) measured gust
- Reported by
- ASOS
- Coordinates
- 42.403, -90.709
A 64 mph wind gust was recorded by the ASOS at the Dubuque Regional Airport at 607 am CDT July 11.
Thunderstorm Wind, Dubuque
- When
- July 11, 5:10 AM CST
- Where
- Dubuque County, 0.59 mi ENE of (Dbq)dubuque Muni Ar
- Measured
- 64 kt (74 mph) measured gust
- Reported by
- ASOS
- Coordinates
- 42.403, -90.709
A 74 mph wind gust was recorded by the ASOS at the Dubuque Regional Airport at 610 am CDT July 11. Some planes were pushed into each other and a maintenance building was damaged.
Thunderstorm Wind, Dubuque
- When
- July 11, 5:10 AM CST
- Where
- Dubuque County, 3.13 mi WNW of Old Balltown
- Measured
- 58 kt (67 mph) measured gust
- Reported by
- Trained Spotter
- Coordinates
- 42.640, -90.930
A 67 mph wind gust was recorded 3 miles west of Balltown, IA at 610 am CDT July 11. Widespread crop damage was also observed.
Thunderstorm Wind, Dubuque
- When
- July 11, 5:10 AM CST
- Where
- Dubuque County, 1.92 mi NE of Key West
- Measured
- 65 kt (75 mph) estimated gust
- Property damage
- $100,000
- Reported by
- Newspaper
- Coordinates
- 42.470, -90.654
Wind gust between 65 and 75 mph caused two anaerobic digesters under construction at the Dubuque Water Pollution Control Plant to collapse around 610 am CDT July 11.
Thunderstorm Wind, Jackson
- When
- July 11, 5:10 AM CST
- Where
- Jackson County, 1.93 mi SSW of Smiths Ferry
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $10,000
- Reported by
- Newspaper
- Coordinates
- 42.293, -90.438
Wind gusts estimated to be 70 mph blew a semi-tractor trailer over just north of Bellevue, IA around 610 am CDT July 11.
Thunderstorm Wind, Jackson
- When
- July 11, 5:10 AM CST
- Where
- Jackson County, 2.89 mi WSW of Bellevue
- Measured
- 61 kt (70 mph) estimated gust
- Reported by
- Newspaper
- Coordinates
- 42.254, -90.422
Wind gusts estimated to be 70 mph uprooted a 50 foot tall tree at Vine and 2nd Streets in Bellevue, IA around 610 am CDT July 11.
Thunderstorm Wind, Scott
- When
- July 11, 5:15 AM CST
- Where
- Scott County, 0.69 mi N of Parkview
- Measured
- 52 kt (60 mph) estimated gust
- Property damage
- $1,000
- Reported by
- NWS Employee
- Coordinates
- 41.710, -90.580
Wind gusts estimated to be 60 mph caused some roof damage about 1 mile north of Long Grove, IA at 615 am CDT July 11.
Thunderstorm Wind, Clinton
- When
- July 11, 5:15 AM CST
- Where
- Clinton County, 0.34 mi E of Dewitt
- Measured
- 61 kt (70 mph) estimated gust
- Property damage
- $1,000
- Reported by
- Newspaper
- Coordinates
- 41.820, -90.543
Wind gusts estimated to be 70 mph blew down a large tree in DeWitt, IA around 615 am CDT July 11. Power and phone lines were severed.
Thunderstorm Wind, Clinton
- When
- July 11, 5:25 AM CST
- Where
- Clinton County, 1.69 mi WNW of Clinton
- Measured
- 52 kt (60 mph) estimated gust
- Property damage
- $5,000
- Reported by
- Trained Spotter
- Coordinates
- 41.840, -90.230
Wind gusts estimated to be 60 mph blew down some power lines in Clinton, IA around 625 am CDT July 11.
Thunderstorm Wind, Jackson
- When
- July 11, 5:30 AM CST
- Where
- Jackson County, 0.51 mi E of Maquoketa
- Measured
- 52 kt (60 mph) estimated gust
- Property damage
- $5,000
- Reported by
- Trained Spotter
- Coordinates
- 42.070, -90.670
Wind gusts estimated to be 60 mph blew down some branches in Maquoketa, IA around 630 am CDT July 11. Some streets were blocked by the branches. A power outage was also observed.
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
- Lightning
- A lightning strike that killed, injured or caused damage.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Flash Flood and Damaging Wind in Utah, July 11 to 13, 20113 deaths · 3 injured · $200,000 · 60 kt wind · 4 events
- Damaging Winds and Lightning Strikes in Illinois, July 11, 20111 death · 6 injured · $656,000 · 75 kt wind · 91 events
- Hail and Damaging Winds in Michigan, July 11, 20111 death · 1 injured · $8.3 million · 70 kt wind · 12 events
- Tornado and Damaging Winds in Iowa, July 11, 2011$7.7 million · EF0 · 44 events
- Damaging Winds and Lightning Strikes in Wisconsin, July 11, 20111 injured · $5.5 million · 70 kt wind · 21 events
- Damaging Winds and Lightning Strike in Indiana, July 11, 20111 injured · $130,000 · 70 kt wind · 37 events
- Damaging Winds in Wisconsin, July 11, 2011$669,000 · 65 kt wind · 4 events
- Hail and Damaging Winds in Ohio, July 11, 2011$99,000 · 1.5 in hail · 41 events
- Flash Flooding and Hail in Texas, July 11 to 12, 2011$435,000 · 1.75 in hail · 10 events
- Damaging Winds in Ohio, July 11, 2011$235,000 · 56 kt wind · 16 events
- Damaging Winds in Maryland, July 11, 2011$82,000 · 61 kt wind · 24 events
- Flash Flood and Hail in Nebraska, July 11, 2011$101,000 · 2.5 in hail · 16 events
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: 338585, 338568, 329678, 329686, 329685, 329691, 329693, 329767, 338451, 329702, 329705, 329711, 329727, 329742, 329746, 338458, 338516, 338517, 329766, 329789, 329797, 329799, 329802, 329821, 329834, 329863, 329865, 329841, 329843, 329847, 329848, 329850, 329856, 330049, 329864, 329866, 329867, 338539, 330053, 338596, and more.