Alert archive / Iowa / Tornado Warnings in 2017

Tornado Warning 39, NWS Quad Cities, IA

May 27, 2017Keokuk County, Washington County, Iowa

NWS Quad Cities, IA issued this tornado warning at May 27, 2017, 4:40 PM CDT for Keokuk County, Washington County, Iowa. It was in force for 50 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 27, 2017, 4:40 PM CDT (21:40 UTC)
Expired
May 27, 2017, 5:30 PM CDT
In force
50 min
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

Counties Keokuk County, IA, Washington County, IA

The radar

The Quad Cities radar (KDVN), 136 km from the middle of the area, began a volume at 21:42 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
May 27, 5:01 PM CDTFUNNEL CLOUD5 Ne Richland, IAFUNNEL CLOUD AND WALL CLOUD VISIBLE WELL TO THE NORTHWEST FROM HIGHWAY 1 IN SOUTHEAST WASHINGTON COUNTY. LOCATION APPROXIMATE.
May 27, 5:08 PM CDTHAIL 1.255 Ne Sigourney, IAJUST EAST OF LAKE BELVA DEER STATE PARK. QUARTER TO HALF DOLLAR SIZE HAIL.
May 27, 5:22 PM CDTTORNADO 03 S Harper, IAVIDEO EVIDENCE OF BRIEF TOUCHDOWN. NO KNOWN DAMAGE PATH OR DEGREE OF DAMAGE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.7 hours before the alert went out and 142 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Davenport, at 12:00Z on 2017-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2017-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
703 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
33 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

063 
WFUS53 KDVN 272140
TORDVN
IAC107-183-272230-
/O.NEW.KDVN.TO.W.0039.170527T2140Z-170527T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
440 PM CDT SAT MAY 27 2017

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Central Keokuk County in southeastern Iowa...
  West central Washington County in southeastern Iowa...

* Until 530 PM CDT
    
* At 440 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Sigourney, moving east at 30 mph.

  HAZARD...Tornado and quarter size hail. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Sigourney around 445 PM CDT. 
  Harper around 500 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Yenruogis County Park, Keota, Sigourney Iowa Airport, Sig-Nor Field
Airport, Lancaster, Talleyrand, Keokuk County Expo, Lake Belva Deer
Park and Webster.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4126 9235 4144 9235 4143 9188 4123 9189
TIME...MOT...LOC 2140Z 271DEG 25KT 4135 9226 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

ERVIN
11 follow-up statements
009 
WWUS53 KDVN 272144
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
444 PM CDT SAT MAY 27 2017

IAC107-183-272230-
/O.CON.KDVN.TO.W.0039.000000T0000Z-170527T2230Z/
Keokuk IA-Washington IA-
444 PM CDT SAT MAY 27 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR CENTRAL
KEOKUK AND WEST CENTRAL WASHINGTON COUNTIES...
    
At 444 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Sigourney, moving east at 30 mph.

HAZARD...Tornado and golf ball size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Harper around 500 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Yenruogis County Park, Keota, Sigourney Iowa Airport, Sig-Nor Field
Airport, Lancaster, Talleyrand, Keokuk County Expo, Lake Belva Deer
Park and Webster.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4126 9235 4144 9235 4143 9188 4123 9189
TIME...MOT...LOC 2144Z 267DEG 25KT 4135 9222 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ERVIN
894 
WWUS53 KDVN 272147
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
447 PM CDT SAT MAY 27 2017

IAC107-183-272230-
/O.CON.KDVN.TO.W.0039.000000T0000Z-170527T2230Z/
Keokuk IA-Washington IA-
447 PM CDT SAT MAY 27 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR CENTRAL
KEOKUK AND WEST CENTRAL WASHINGTON COUNTIES...
    
At 447 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Sigourney, moving east at 15 mph.

HAZARD...Tornado and golf ball size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Sigourney around 450 PM CDT. 
  Harper around 515 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Yenruogis County Park, Keota, Sigourney Iowa Airport, Sig-Nor Field
Airport, Lancaster, Talleyrand, Keokuk County Expo, Lake Belva Deer
Park and Webster.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4126 9235 4144 9235 4143 9188 4123 9189
TIME...MOT...LOC 2147Z 270DEG 15KT 4135 9222 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ERVIN
864 
WWUS53 KDVN 272151
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
451 PM CDT SAT MAY 27 2017

IAC107-183-272230-
/O.CON.KDVN.TO.W.0039.000000T0000Z-170527T2230Z/
Keokuk IA-Washington IA-
451 PM CDT SAT MAY 27 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR CENTRAL
KEOKUK AND WEST CENTRAL WASHINGTON COUNTIES...
    
At 451 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Sigourney, moving east at 15 mph.

HAZARD...Tornado and golf ball size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Harper around 515 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Yenruogis County Park, Keota, Sigourney Iowa Airport, Sig-Nor Field
Airport, Lancaster, Talleyrand, Keokuk County Expo, Lake Belva Deer
Park and Webster.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4127 9230 4144 9231 4143 9188 4123 9189
TIME...MOT...LOC 2151Z 270DEG 15KT 4135 9220 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ERVIN
016 
WWUS53 KDVN 272155
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
455 PM CDT SAT MAY 27 2017

IAC107-183-272230-
/O.CON.KDVN.TO.W.0039.000000T0000Z-170527T2230Z/
Keokuk IA-Washington IA-
455 PM CDT SAT MAY 27 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR CENTRAL
KEOKUK AND WEST CENTRAL WASHINGTON COUNTIES...
    
At 455 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Sigourney, moving east at 20 mph.

HAZARD...Tornado and golf ball size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Harper around 515 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Yenruogis County Park, Keota, Sigourney Iowa Airport, Sig-Nor Field
Airport, Lancaster, Talleyrand, Keokuk County Expo, Lake Belva Deer
Park and Webster.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4127 9230 4144 9231 4143 9188 4123 9189
TIME...MOT...LOC 2155Z 275DEG 15KT 4134 9217 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ERVIN
946 
WWUS53 KDVN 272200
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
500 PM CDT SAT MAY 27 2017

IAC107-183-272230-
/O.CON.KDVN.TO.W.0039.000000T0000Z-170527T2230Z/
Keokuk IA-Washington IA-
500 PM CDT SAT MAY 27 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR CENTRAL
KEOKUK AND WEST CENTRAL WASHINGTON COUNTIES...
    
At 500 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Sigourney, moving east at 20 mph.

HAZARD...Tornado and golf ball size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Harper around 510 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Yenruogis County Park, Keota, Sigourney Iowa Airport, Sig-Nor Field
Airport, Lancaster, Talleyrand, Keokuk County Expo, Lake Belva Deer
Park and Webster.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4127 9230 4144 9231 4143 9188 4123 9189
TIME...MOT...LOC 2200Z 279DEG 19KT 4133 9214 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ERVIN
923 
WWUS53 KDVN 272202
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
502 PM CDT SAT MAY 27 2017

IAC107-183-272230-
/O.CON.KDVN.TO.W.0039.000000T0000Z-170527T2230Z/
Keokuk IA-Washington IA-
502 PM CDT SAT MAY 27 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR EAST
CENTRAL KEOKUK AND WEST CENTRAL WASHINGTON COUNTIES...
    
At 501 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Sigourney, moving east at 20 mph.

HAZARD...Tornado and golf ball size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Harper around 510 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Yenruogis County Park, Keota, Sigourney Iowa Airport, Sig-Nor Field
Airport, Lancaster, Talleyrand, Keokuk County Expo and Lake Belva
Deer Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4127 9227 4143 9225 4143 9188 4123 9189
TIME...MOT...LOC 2201Z 279DEG 19KT 4132 9213 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ERVIN
663 
WWUS53 KDVN 272204
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
504 PM CDT SAT MAY 27 2017

IAC107-183-272230-
/O.CON.KDVN.TO.W.0039.000000T0000Z-170527T2230Z/
Keokuk IA-Washington IA-
504 PM CDT SAT MAY 27 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR EAST
CENTRAL KEOKUK AND WEST CENTRAL WASHINGTON COUNTIES...
        
At 504 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Harper, or near Sigourney, moving east at 20 mph.

HAZARD...Tornado and golf ball size hail. 

SOURCE...Weather spotters reported a funnel cloud. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Harper around 515 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Yenruogis County Park, Keota, Sigourney Iowa Airport, Sig-Nor Field
Airport, Lancaster, Talleyrand, Keokuk County Expo and Lake Belva
Deer Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4127 9227 4143 9225 4143 9188 4123 9189
TIME...MOT...LOC 2204Z 263DEG 17KT 4133 9212 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ERVIN
683 
WWUS53 KDVN 272209
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
509 PM CDT SAT MAY 27 2017

IAC107-183-272230-
/O.CON.KDVN.TO.W.0039.000000T0000Z-170527T2230Z/
Keokuk IA-Washington IA-
509 PM CDT SAT MAY 27 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR EAST
CENTRAL KEOKUK AND WEST CENTRAL WASHINGTON COUNTIES...
        
At 509 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Harper, or near Sigourney, moving east at 15 mph.

HAZARD...Tornado and golf ball size hail. 

SOURCE...Weather spotters reported a funnel cloud. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Harper around 515 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Yenruogis County Park, Keota, Sigourney Iowa Airport, Sig-Nor Field
Airport, Lancaster, Talleyrand, Keokuk County Expo and Lake Belva
Deer Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4127 9227 4143 9225 4143 9188 4123 9189
TIME...MOT...LOC 2209Z 274DEG 13KT 4133 9209 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ERVIN
783 
WWUS53 KDVN 272213
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
513 PM CDT SAT MAY 27 2017

IAC107-183-272230-
/O.CON.KDVN.TO.W.0039.000000T0000Z-170527T2230Z/
Keokuk IA-Washington IA-
513 PM CDT SAT MAY 27 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR EAST
CENTRAL KEOKUK AND WEST CENTRAL WASHINGTON COUNTIES...
    
At 513 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Harper, or near Sigourney, moving east at 15 mph.

HAZARD...Tornado and golf ball size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This tornadic thunderstorm will remain over mainly rural areas of
east central Keokuk and west central Washington Counties, including
the following locations: Lancaster, Talleyrand, Keota and Lake Belva
Deer Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4127 9218 4142 9217 4143 9188 4123 9189
TIME...MOT...LOC 2213Z 274DEG 13KT 4133 9207 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ERVIN
025 
WWUS53 KDVN 272219
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
519 PM CDT SAT MAY 27 2017

IAC107-183-272230-
/O.CON.KDVN.TO.W.0039.000000T0000Z-170527T2230Z/
Keokuk IA-Washington IA-
519 PM CDT SAT MAY 27 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR EAST
CENTRAL KEOKUK AND WEST CENTRAL WASHINGTON COUNTIES...
    
At 519 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Harper, or 7 miles east of Sigourney, moving east at
15 mph.

HAZARD...Tornado and golf ball size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This tornadic thunderstorm will remain over mainly rural areas of
east central Keokuk and west central Washington Counties, including
the following locations: Lancaster, Talleyrand, Keota and Lake Belva
Deer Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4127 9218 4142 9217 4143 9188 4123 9189
TIME...MOT...LOC 2219Z 276DEG 13KT 4133 9206 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ERVIN
622 
WWUS53 KDVN 272228
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
528 PM CDT SAT MAY 27 2017

IAC107-183-272238-
/O.EXP.KDVN.TO.W.0039.000000T0000Z-170527T2230Z/
Keokuk IA-Washington IA-
528 PM CDT SAT MAY 27 2017

...THE TORNADO WARNING FOR EAST CENTRAL KEOKUK AND WEST CENTRAL
WASHINGTON COUNTIES WILL EXPIRE AT 530 PM CDT...
    
The tornadic thunderstorm which prompted the warning has weakened. 
Therefore, the warning will be allowed to expire.  However heavy 
rain is still possible with this thunderstorm.

LAT...LON 4127 9218 4142 9217 4143 9188 4123 9189
TIME...MOT...LOC 2228Z 271DEG 25KT 4133 9199 

$$

ERVIN

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 27, 1:53 AM CDTDense Fog AdvisoryDVNBenton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more8 hr
May 27, 4:13 PM CDTSpecial Weather StatementDVNBuchanan32 min
May 27, 4:21 PM CDTSpecial Weather StatementDVNKeokuk24 min
May 27, 4:27 PM CDTSevere Thunderstorm WarningDVNKeokuk63 min

Nearby

Tornado Warnings in Iowa, 2017Every tornado warning in 2017Tornadoes in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.