Tornadoes · United States · Iowa · 2014

EF0 tornado, Atkins, Iowa, June 16, 2014

Name: EF0 tornado, Atkins, Iowa, June 16, 2014
Start: 2014-06-17T03:05:00.000Z
End: 2014-06-17T03:06:00.000Z
Location: Atkins, Iowa

This EF0 tornado ran 0.1 miles across Benton County on June 16, 2014, touching down at 10:05 PM CDT and reaching 30 yards wide. It killed nobody.

The rating scale

Tracks are drawn in the color of the rating. The Enhanced Fujita scale rates the damage rather than measuring the wind: the speeds are what that damage is taken to imply.

EF065 to 85 mphthis tornado
Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.
EF186 to 110 mph
Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.
EF2111 to 135 mph
Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.
EF3136 to 165 mph
Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.
EF4166 to 200 mph
Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.
EF5over 200 mph
Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.
Unrated
The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

The record

Rating: EF0
Date: June 16, 2014
Touchdown: 10:05 PM CDT (03:05 UTC)
Lifted: 10:06 PM CDT (03:06 UTC)
On the ground: 1 minutes
Path length: 0.1 miles (0.1 km)
Path width: 30 yards (27 m)
Deaths: 0
Injuries: 0
Crop damage: $1,000
County: Benton County
Touchdown point: 41.979, -91.873
Lift-off point: 41.979, -91.872
Record number: 1406162105-01

What the Weather Service recorded

A warm front extended from eastern Nebraska to western Illinois and was lifting northward on June 16-17, 2014. An extremely unstable air mass was over the area on June 16 along with strong deep layer shear. This allowed scattered supercells to form during the afternoon and evening which produced two tornadoes, very large hail and damaging winds. A weak tornado formed 4 miles south of Lamont, Iowa in Buchanan County, tracked about 1 mile to the northeast before crossing into Delaware County. In Delaware County the tornado continued for about 13 miles to the northeast to Edgewood, Iowa. Another weak tornado briefly touched down in Benton County, Iowa. Strengthening mid level winds along with a strong low level jet in place later in the evening and overnight on June 17 produced widespread damaging winds of 60 to 70 mph. Strong warm air advection triggered more severe thunderstorms during the late evening of June 17.

A brief tornado left a swath of crop damage in a corn field about 1 mile south-southwest of Atkins. The county emergency manager conducted a detailed ground survey and confirmed a convergent pattern in the damaged corn stalks, which were snapped off at their base.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

The warnings

3 minutes of warning. NWS DVN issued a tornado warning for this county at 03:02 UTC, 3 minutes before the tornado touched down, in force until 03:16 UTC.

The county was under a severe thunderstorm watch, issued at 02:01 UTC and running to 04:19 UTC.

Issued (UTC)	Expired	Product	Office
20:36 UTC	02:01 UTC	Severe Thunderstorm Watch	DVN
01:21 UTC	02:15 UTC	Severe Thunderstorm Warning	DVN
02:01 UTC	04:19 UTC	Severe Thunderstorm Watch	DVN
02:14 UTC	03:15 UTC	Severe Thunderstorm Warning	DVN
02:47 UTC	03:30 UTC	Severe Thunderstorm Warning	DVN
03:02 UTC	03:16 UTC	Tornado Warning	DVN
03:13 UTC	03:31 UTC	Tornado Warning	DVN

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The forecast that day

The Storm Prediction Center had this point in a Moderate Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 01:14 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

What forecasters said that day

The local office's own words before the tornado touched down, 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 tornado touched down at Jun 16, 6:26 PM CDT, 3 hours 39 minutes earlier.

Area forecast discussion, Jun 16, 6:26 PM CDT, 3 hours 39 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
626 PM CDT MON JUN 16 2014

.UPDATE...
ISSUED AT 548 PM CDT MON JUN 16 2014

WARM FRONT CONTINUES TO SHIFT INTO OUR NORTHERN CWA WITH CAPPING
TO THE SOUTH. HAVE UPDATED THE GRIDS TO CANCEL THE SEVERE THUNDERSTORM
WATCH FOR LOCATIONS SOUTH OF HIGHWAY 30. LOOKS LIKE A LULL FOR
SEVERAL HOURS AND THEN AWAIT THE ARRIVAL OF MCS COMING OUT OF NW
IA. THIS SHOULD IMPACT OUR NORTHERN CWA LATER THIS EVENING AND
INTO THE OVERNIGHT HOURS...THEREFORE THE WATCH WILL REMAIN IN PLACE.

&&

.SYNOPSIS...
ISSUED AT 405 PM CDT MON JUN 16 2014

WARM FRONT EXTENDED FROM EASTERN NEB TO WESTERN IL WITH TEMPERATURES
IN THE 80S ACROSS THE DVN CWA WITH DEWPOINTS IN THE LOWER 70S SOUTH
OF THE FRONT. SBCAPES ARE NEARLY 5000 J/KG ALONG AND SOUTH OF THE
FRONT AND IN THE PAST COUPLE OF HOURS LEFT MOVING SUPERCELLS HAVE
FORMED IN SE IA PRODUCING VERY LARGE HAIL. A LARGER MCS WAS ORGANIZING
IN FAR NW IA/SW MN/NE NEB. A STRENGTHENING LOW LEVEL JET WAS
POINTING INTO THE MCS WELL TO OUR NW WHERE MID LEVEL LAPSE RATES
ARE 9 C/KM AND SFC-3KM HELICITIES ARE 500 M2/S2.

&&

.SHORT TERM...(THIS EVENING THROUGH TUESDAY)
ISSUED AT 405 PM CDT MON JUN 16 2014

FORECAST FOCUS ON SEVERE WEATHER THIS EVENING.

LATE THIS AFTERNOON THROUGH TONIGHT SIGNIFICANT SEVERE WEATHER
EXPECTED WITH VERY LARGE HAIL AND DAMAGING WINDS OF AT LEAST 70 TO
80 MPH. AN ISOLATED TORNADO ALSO POSSIBLE. SCATTERED SUPERCELLS
WILL CONTINUE THIS EVENING TO DEVELOP AND SPREAD NORTHEAST ALONG
WITH THE WARM FRONT. STRONG LOW LEVEL SHEAR IN PLACE ALONG WITH
HIGH CAPE. LATER THIS EVENING INTO THE OVERNIGHT HOURS THE ORGANIZING
MCS TO OUR NW WILL CONGEAL INTO A POTENTIAL DERECHO WITH WIDESPREAD
DAMAGING WIND WITH THE POTENTIAL FOR 80+ MPH WINDS WHICH SHOULD
ROAR ACROSS OUR NORTHERN HALF OF THE CWA.

TUESDAY...MODELS SUGGEST A CAP IN PLACE AND WITH THE WARM FRONT TO
OUR NORTH CONVECTION SHOULD BE MINIMAL. THIS WILL BE A HOT AND
HUMID DAY WITH HIGH TEMPERATURES AROUND 90 WITH DEWPOINTS IN THE
LOWER 70S. HEAT INDEX VALUES WILL PUSH INTO THE MID 90S TO AROUND
100 WHICH WILL BE NEAR HEADLINE CRITERIA...ESPECIALLY IN OUR SOUTH.

.LONG TERM...(TUESDAY NIGHT THROUGH MONDAY)
ISSUED AT 405 PM CDT MON JUN 16 2014

DEEP TROUGH IN THE WEST WILL GRADUALLY LIFT TO THE UPPER MIDWEST
BY THE WEEKEND KEEPING THE ACTIVE PATTERN GOING INTO THE WEEKEND.
THERE WILL BE CHANCE POPS EACH DAY WITH POSITION OF THE FRONTAL
BOUNDARY TO BE DETERMINED. OF COURSE THIS WILL DEPEND ON WHERE MCS
ACTIVITY DEVELOPS. HIGH TEMPERATURES WILL BE AROUND 90 AGAIN ON
WEDNESDAY WITH HEAT INDEX VALUES WELL INTO THE 90S TO AROUND 100.
THEREAFTER READINGS SHOULD REMAIN IN THE 80S.

EARLY NEXT WEEK...UPPER RIDGING BUILDS INTO THE AREA WITH SURFACE
HIGH PRESSURE INTO THE GREAT LAKES. HIGHS SHOULD DROP INTO THE 70S.

&&

.AVIATION...(FOR THE 00Z TAFS THROUGH 00Z TUESDAY EVENING)
ISSUED AT 622 PM CDT MON JUN 16 2014

EVENING STORMS ALONG A WARM FRONT HAVE DIED AS WARM AIR ALOFT
ARRIVED AHEAD OF A STRONG LINE OF STORMS TO THE NORTHWEST. THE
EVENING WILL BE MAINLY WINDY AND VFR AS WE WAIT FOR THESE SEVERE
STORMS TO ARRIVE. THEY ARE LIKELY TO IMPACT LOCATIONS NORTH OF
INTERSTATE 80 OVERNIGHT AND EARLY TUESDAY MORNING...AND STRONG
STORMS ARE INCLUDED IN THE CID AND DBQ TAF FOR THIS...A VCTS IS
INCLUDED AT MLI AS WE ARE LESS CONFIDENT OF OCCURRENCE THERE.
OTHERWISE...SOME EARLY MORNING MVFR FOG IS LIKELY IN A MOIST
ATMOSPHERE...WITH ANOTHER VFR DAY EXPECTED TUESDAY AFTER STORMS
CLEAR OUT.

ERVIN

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...NONE.
IL...NONE.
MO...NONE.
&&

UPDATE...HAASE
SYNOPSIS...HAASE
SHORT TERM...HAASE
LONG TERM...HAASE
AVIATION...ERVIN

Hazardous weather outlook, Jun 16, 12:05 PM CDT, 10 hours before

HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1205 PM CDT MON JUN 16 2014

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-170915-
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-
1205 PM CDT MON JUN 16 2014

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...THIS AFTERNOON AND TONIGHT

SEVERE THUNDERSTORMS ARE LIKELY OVER PORTIONS OF THE OUTLOOK AREA
LATE THIS AFTERNOON AND EVENING. AT THIS TIME...THE AREA MOST AT
RISK FOR SEVERE WEATHER APPEARS TO BE NORTH OF A LINE FROM OTTUMWA
IOWA...TO GALESBURG ILLINOIS. VERY LARGE HAIL TO AROUND THE SIZE OF
GOLFBALLS...AND DAMAGING WINDS OF 60 MPH TO POSSIBLY OVER 80 MPH WILL
BE THE MAIN THREATS. ISOLATED BRIEF TORNADOES WILL ALSO BE POSSIBLE.
IN ADDITION...HEAVY RAINFALL COULD RESULT IN LOCALIZED FLASH
FLOODING DUE TO INTENSE RAINFALL RATES.

THE STORM PREDICTION CENTER HAS A SLIGHT RISK OF SEVERE STORMS
FOR MOST OF THE OUTLOOK AREA...WITH A MODERATE RISK FOR PORTIONS OF
EASTERN IOWA NORTH OF INTERSTATE 80.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THE CONFIDENCE THAT THE AREA WILL BE IN OR CLOSE TO THE ORGANIZED
THUNDERSTORM TRACK TUESDAY THROUGH SUNDAY IS HIGH. CONFIDENCE IS
LOW ON WHERE EACH THUNDERSTORM COMPLEX WILL TRACK. DEPENDING UPON
WHERE STORMS TRACK...RAINFALL AMOUNTS COULD BE VERY SIGNIFICANT.

THUNDERSTORMS WILL BE POSSIBLE EVERY DAY FROM TUESDAY THROUGH
SUNDAY.

THE STORM PREDICTION CENTER HAS A SLIGHT RISK OF SEVERE STORMS
TUESDAY AND TUESDAY NIGHT NORTH OF INTERSTATE 80...AND FOR THE
ENTIRE AREA WEDNESDAY AND WEDNESDAY NIGHT. RIGHT NOW THE PRIMARY
THREATS APPEAR TO BE HIGH WINDS AND HAIL.

AREAS THAT DO NOT SEE RAIN TUESDAY OR WEDNESDAY WILL BE VERY WARM
AND HUMID...WITH HEAT INDEX READINGS POTENTIALLY WELL INTO THE
90S.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY FOR PORTIONS OF THE OUTLOOK AREA LATE
THIS AFTERNOON AND EVENING.

05/SHEETS/08

In the hours before

Local storm report, Jun 16, 9:42 PM CDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
942 PM CDT MON JUN 16 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0939 PM     TSTM WND GST     1 N KEYSTONE            42.01N 92.20W
06/16/2014  E70.00 MPH       BENTON             IA   EMERGENCY MNGR

            ESTIMATED AT LEAST 70 MPH FROM KEYSTONE FIRE DEPARTMENT.

&&

Local storm report, Jun 16, 9:49 PM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
949 PM CDT MON JUN 16 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0946 PM     TSTM WND GST     2 W MANCHESTER          42.49N 91.50W
06/16/2014  M70 MPH          DELAWARE           IA   EMERGENCY MNGR

            FROM MANCHESTER FIRE DEPT RELAYED BY DELAWARE EMERGENCY
            MANAGEMENT.

&&

Local storm report, Jun 16, 9:53 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
953 PM CDT MON JUN 16 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0948 PM     TSTM WND GST     VAN HORNE               42.01N 92.09W
06/16/2014  M62 MPH          BENTON             IA   TRAINED SPOTTER

0949 PM     TSTM WND GST     9 S INDEPENDENCE        42.34N 91.89W
06/16/2014  E55 MPH          BUCHANAN           IA   TRAINED SPOTTER

            ESTIMATED 50 TO 55 MPH WINDS ON HWY 150.

&&

TEO

Local storm report, Jun 16, 9:55 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
955 PM CDT MON JUN 16 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0950 PM     FLASH FLOOD      1 W INDEPENDENCE        42.47N 91.90W
06/16/2014                   BUCHANAN           IA   TRAINED SPOTTER

            STREETS ARE FLOODING DUE TO STORM SEWERS NOT KEEPING UP
            WITH THE HEAVY RAIN. ESTIMATED OVER AN INCH OF RAIN FELL
            SO FAR.

&&

TEO

Local storm report, Jun 16, 9:58 PM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
958 PM CDT MON JUN 16 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0953 PM     TSTM WND DMG     1 W VAN HORNE           42.01N 92.11W
06/16/2014                   BENTON             IA   EMERGENCY MNGR

            TREES AND POWER POLES DOWN 1 TO 2 MILES WEST.

&&

TEO

Local storm report, Jun 16, 10:00 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1000 PM CDT MON JUN 16 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0959 PM     TSTM WND GST     1 NW VAN HORNE          42.02N 92.10W
06/16/2014  E60 MPH          BENTON             IA   EMERGENCY MNGR

&&

The air that afternoon

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

Davenport, (KDVN), 00:00Z

3.1 hours before the tornado, 121 km from the path. June 17, 2014.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.

Mixed-layer CAPE: 2074 J/kg
Mixed-layer CIN: -15 J/kg
Surface CAPE: 2990 J/kg
Mixed-layer LCL: 1135 m above ground
0-6 km bulk shear: 45 kt
0-1 km bulk shear: 16 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 5.2
0-3 km lapse rate: 7.0 K/km

Open this sounding in Storm Lab

Davenport, (KDVN), 12:00Z

8.9 hours after it, 121 km from the path. June 17, 2014.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.

Hodograph

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: -85581 J/kg
Surface CAPE: 0 J/kg
Mixed-layer LCL: 1253 m above ground
0-6 km bulk shear: 50 kt
0-1 km bulk shear: 28 kt
0-1 km storm-relative helicity: -222 m²/s²
0-3 km storm-relative helicity: -87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0
0-3 km lapse rate: 4.2 K/km

Open this sounding in Storm Lab

The surface observations

Cedar Rapids (CID), 16 km from the path, in the two hours either side.

Time (UTC)	Temp (°F)	Dew point (°F)	Wind	Gust (kt)	Pressure (mb)	Weather
01:09 UTC	79	69	170° 15 kt	24	1007.8	-TSRA
01:27 UTC	78	70	170° 14 kt	19	1008.5
01:52 UTC	78	70	160° 12 kt	21	1007.8
02:52 UTC	78	71	170° 13 kt	22	1007.1
03:20 UTC	79	72	200° 15 kt	23	1007.1	VCTS
03:28 UTC	69	62	320° 11 kt	34	1008.8	VCTS -RA
03:32 UTC	68	63	350° 20 kt	34	1008.5	-TSRA
03:36 UTC	67	64	360° 17 kt	29	1008.5	+TSRA BR
03:41 UTC	65	63	340° 13 kt	29	1008.1	+TSRA BR
03:48 UTC	66.2	64.4	300° 7 kt	21	1009.1	+TSRA BR
03:52 UTC	66	65	3 kt		1009.5	+TSRA BR
03:55 UTC	66	65	0° 0 kt		1009.1	+TSRA FG
04:00 UTC	65	65	320° 8 kt		1009.1	+TSRA BR
04:11 UTC	66	64	290° 14 kt		1009.1	+TSRA BR
04:14 UTC	66	64	310° 15 kt		1008.8	+TSRA
04:20 UTC	66	64	310° 14 kt		1009.1	+TSRA BR
04:37 UTC	66	64	60° 6 kt		1008.1	-TSRA BR
04:50 UTC	66.2	64.4	300° 7 kt		1009.8	VCTS -RA
04:52 UTC	66	64	330° 7 kt		1009.5	VCTS -RA

From the Iowa Environmental Mesonet's archive of airport observations.

The radar

The Quad Cities radar (KDVN), 115 km away, was scanning. The volume nearest the touchdown began at 03:05 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

What was reported nearby

Local storm reports within 60 km of the path, in the three hours either side.

Time (UTC)	Report	Where	County	Remark
02:14 UTC	FUNNEL CLOUD	3 Ssw Dysart	Tama, IA
02:14 UTC	TSTM WND GST 60	3 Ssw Dysart	Tama, IA
02:31 UTC	TORNADO	N Winthrop	Buchanan, IA	160TH AND 187TH.
02:32 UTC	TORNADO	N Winthrop	Buchanan, IA	160TH AND 187TH.
02:39 UTC	TSTM WND GST 70	1 N Keystone	Benton, IA	ESTIMATED AT LEAST 70 MPH FROM KEYSTONE FIRE DEPARTMENT.
02:48 UTC	TSTM WND GST 62	Van Horne	Benton, IA
02:49 UTC	TSTM WND GST 55	9 S Independence	Buchanan, IA	ESTIMATED 50 TO 55 MPH WINDS ON HWY 150.
02:50 UTC	FLASH FLOOD	1 W Independence	Buchanan, IA	STREETS ARE FLOODING DUE TO STORM SEWERS NOT KEEPING UP WITH THE HEAVY RAIN. ESTIMATED OVER AN INCH OF RAIN FELL SO FAR.
02:53 UTC	TSTM WND DMG	1 W Van Horne	Benton, IA	TREES AND POWER POLES DOWN 1 TO 2 MILES WEST.
02:59 UTC	TSTM WND GST 60	1 Nw Van Horne	Benton, IA
03:10 UTC	TSTM WND DMG	Ese Cedar Rapids	Linn, IA	LARGE TREE FELL ON RIVER GAUGE SITE ON THE CEDAR RIVER IN TOWN...TIME ESTIMATED. ALSO REPORTED BY CITY EMPLOYEE...DELAYED REPORT.
03:10 UTC	HEAVY RAIN 1.35	1 Nw Van Horne	Benton, IA	DURATION OF 15 MINUTES.
03:15 UTC	HEAVY RAIN 1.25	Urbana	Benton, IA	1.25 TO 1.49 INCHES IN 20 MINUTES. DELAYED REPORT.
03:20 UTC	TSTM WND GST 72	1 N Fairfax	Linn, IA	80TH STREET AND HIGHWAY 30 NORTH OF FAIRFAX VIA FIRE DEPT RELAYED BY EMERGENCY MANAGER.
03:26 UTC	TSTM WND GST 60	Cedar Rapids	Linn, IA	NEAR I380 AND 100. HEAVY RAIN
03:28 UTC	TSTM WND DMG	2 W Cedar Rapids	Linn, IA	EXTENSIVE TREE DAMAGE FROM INTERSECTION OF JOHNSON AND EDGEWOOD TO 6TH ST AND WILSON. SEVERAL FULL GROWN TREES SNAPPED OFF BY THE BASE OF THE TREE. ALSO DAMAGE NEAR CLEVELAND ELEMENTARY SCHOOL. TIME ESTIMATED FROM RADAR.
03:28 UTC	TSTM WND DMG	2 W Cedar Rapids	Linn, IA	TREE DAMAGE SEEN ON 29TH AND 30TH ST. SEVERAL SIZES OF TREE WITH LARGEST UPROOTED AND ON THE GROUND ON 29TH...TIME ESTIMATED FROM RADAR.
03:28 UTC	TSTM WND GST 60	Cedar Rapids	Linn, IA	NEAR I380 AND 100. HEAVY RAIN
03:35 UTC	TSTM WND DMG	Nne Swisher	Johnson, IA	LARGE TREE BRANCHES DOWN IN TOWN...WITH LARGEST APPROX 15 INCHES IN DIAMETER.
03:35 UTC	TSTM WND GST 60	Nne Swisher	Johnson, IA	TIME ESTIMATED FROM RADAR.
03:40 UTC	HEAVY RAIN 1.81	Wsw Quasqueton	Buchanan, IA	TOTAL FELL IN 1 HOUR FROM 2130L TO 2225L. MINOR STANDING WATER VISIBLE IN FRONT PASTURE. NO WIND DAMAGE VISIBLE AT THIS TIME.
03:52 UTC	HEAVY RAIN 1.6	W Belle Plaine	Benton, IA	STILL RAINING.

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

This ground now

The live radar over the track Every 2014 tornado in Iowa Every tornado in Iowa since 1950 Warnings in force in Iowa now The forecast where you are

The other tornadoes of June 16, 2014

35 more were confirmed in the United States that day.

Date	Time	Rating	Where	Path (mi)	Width (yd)	Deaths	Injuries	Damage
June 16	3:38 PM CDT	EF0	Stanton, NE	1.3	100
June 16	3:42 PM CDT	EF4	Stanton, NE	12.1	400			$2.0 million
June 16	3:43 PM CDT	EF0	Lyon, IA	0.2	50
June 16	4:00 PM CDT	EF4	Stanton, NE	23.9	500	1	20	$14 million
June 16	4:13 PM CDT	EF4	Stanton, NE	11.5	500	1		$1.1 million
June 16	4:40 PM CDT	EF4	Wayne, NE	15.8	530			$3.0 million
June 16	5:41 PM CDT	EF0	Dakota, NE	0.3	50
June 16	5:44 PM CDT	EF0	Pocahontas, IA	6.1	250
June 16	6:22 PM CDT	EF0	Humboldt, IA	4.6	50
June 16	6:24 PM CDT	EF0	Custer, NE	0.2	40
June 16	6:35 PM CDT	EF1	Garfield, NE	2.4	400			$15,000
June 16	6:48 PM CDT	EF1	Cerro Gordo, IA	3.0	110			$50,000
June 16	6:52 PM CDT	EF1	Wright, IA	2.6	175			$27,000
June 16	6:56 PM CDT	EF0	Cerro Gordo, IA	1.1	40			$5,000
June 16	7:01 PM CDT	EF2	Garfield, NE	5.2	500			$100,000
June 16	7:20 PM CDT	EF2	Garfield, NE	1.6	700			$100,000
June 16	7:28 PM CDT	EF2	Garfield, NE	0.3	400			$5,000
June 16	7:30 PM CDT	EF0	Garfield, NE	0.2	40			$1,000
June 16	7:39 PM CDT	EF1	Butler, IA	4.7	100			$200,000
June 16	7:45 PM CDT	EF0	Butler, IA	1.7	150			$400,000
June 16	7:52 PM CDT	EF1	Butler, IA	2.1	120			$200,000
June 16	8:12 PM CDT	EF0	Bremer, IA	2.0	75
June 16	8:23 PM MDT	EF0	Stark, ND	1.4	25
June 16	9:30 PM CDT	EF1	Buchanan, IA	1.3	50			$50,000
June 16	9:33 PM CDT	EF1	Delaware, IA	12.6	50			$100,000
June 16	10:45 PM CDT	EF2	Grant, WI	3.8	100		5	$21 million
June 16	10:49 PM CDT	EF1	Grant, WI	0.5	25			$540,000
June 16	11:00 PM CDT	EF1	Lafayette, WI	1.2	50			$33,000
June 16	11:00 PM CDT	EF1	Lafayette, WI	4.3	200			$1.5 million
June 16	11:10 PM CDT	EF1	Iowa, WI	0.4	100			$20,000
June 16	11:36 PM CDT	EF1	Green, WI	0.5	125			$200,000
June 16	11:36 PM CDT	EF1	Green, WI	0.4	125			$50,000
June 16	12:08 AM CDT	EF3	Dane, WI	1.0	100			$14 million
June 16	12:15 AM CDT	EF2	Dane, WI	0.2	200			$5.0 million
June 16	12:21 AM CDT	EF1	Dane, WI	1.5	300			$300,000

What this means

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

Sources

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.