Alert archive / Iowa / Tornado Warnings in 2017

Tornado Warning 31, NWS Quad Cities, IA

May 17, 20174 counties in Iowa; Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this tornado warning at May 17, 2017, 6:01 PM CDT for 4 counties in Iowa; Clark County, Scotland County, Missouri. It was in force for 59 min. 4 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 17, 2017, 6:01 PM CDT (23:01 UTC)
Expired: May 17, 2017, 7:00 PM CDT
In force: 59 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Henry County, IA, Jefferson County, IA, Lee County, IA, Van Buren County, IA, Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 153 km from the middle of the area, began a volume at 23:01 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

Time	Report	Where	Remark
May 17, 6:17 PM CDT	HAIL 1	2 Ese Keosauqua, IA	HAIL LASTED FOR A MINUTE
May 17, 6:37 PM CDT	HAIL 1.75	1 E Rome, IA
May 17, 6:37 PM CDT	HAIL 2	5 Wnw Mount Pleasant, IA
May 17, 6:40 PM CDT	HAIL 1.75	Nw Mount Pleasant, IA

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 17, 3:44 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.0 hours before the alert went out and 159 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

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.

Mixed-layer CAPE: 103 J/kg
Mixed-layer CIN: -348 J/kg
Mixed-layer LCL: 1223 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

762 
WFUS53 KDVN 172301
TORDVN
IAC087-101-111-177-MOC045-199-180000-
/O.NEW.KDVN.TO.W.0031.170517T2301Z-170518T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
601 PM CDT WED MAY 17 2017

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Henry County in southeastern Iowa...
  Van Buren County in southeastern Iowa...
  Southeastern Jefferson County in southeastern Iowa...
  Northwestern Lee County in southeastern Iowa...
  Northeastern Scotland County in northeastern Missouri...
  Northwestern Clark County in northeastern Missouri...

* Until 700 PM CDT

* At 600 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Cantril, or 10 miles northeast of Memphis, moving
  northeast at 70 mph.

  HAZARD...Tornado. 

  SOURCE...Weather spotters reported 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...
  Keosauqua around 610 PM CDT. 
  Bonaparte and Bentonsport/Vernon around 615 PM CDT. 
  Birmingham and Stockport around 620 PM CDT. 
  Salem and Hillsboro around 625 PM CDT. 
  Lockridge, Rome and Westwood around 630 PM CDT. 
  Mount Pleasant around 635 PM CDT. 
  Wayland around 640 PM CDT. 
  Winfield, Olds and Mount Union around 645 PM CDT. 

Other locations impacted by this tornadic thunderstorm include Henry
County Fairgrounds, Oakland Mills, Hitt, Glasgow, Morris Park, Mount
Zion, Utica, Heath Memorial Conservation Area, Germanville and
Houghton.

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 4056 9227 4060 9223 4060 9218 4066 9218
      4116 9172 4116 9137 4088 9137 4057 9187
      4052 9190 4041 9208
TIME...MOT...LOC 2300Z 219DEG 59KT 4059 9208 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Gibbs

7 follow-up statements

128 
WWUS53 KDVN 172306 RRA
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
606 PM CDT WED MAY 17 2017

IAC087-101-111-177-MOC045-199-180000-
/O.CON.KDVN.TO.W.0031.000000T0000Z-170518T0000Z/
Henry IA-Van Buren IA-Jefferson IA-Lee IA-Scotland MO-Clark MO-
606 PM CDT WED MAY 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR HENRY...
VAN BUREN...SOUTHEASTERN JEFFERSON...NORTHWESTERN LEE...NORTHEASTERN
SCOTLAND AND NORTHWESTERN CLARK COUNTIES...
    
At 606 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Cantril, or near Keosauqua, moving northeast at 65
mph.

HAZARD...Tornado and two inch 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...
  Keosauqua, Bonaparte and Bentonsport/Vernon around 615 PM CDT. 
  Stockport around 620 PM CDT. 
  Hillsboro around 625 PM CDT. 
  Salem, Lockridge and Rome around 630 PM CDT. 
  Mount Pleasant and Westwood around 635 PM CDT. 
  Winfield, Olds and Mount Union around 645 PM CDT. 

Other locations impacted by this tornadic thunderstorm include Henry
County Fairgrounds, Oakland Mills, Hitt, Glasgow, Morris Park, Mount
Zion, Utica, Heath Memorial Conservation Area, Germanville and
Houghton.

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 4056 9227 4060 9223 4060 9218 4066 9218
      4116 9172 4116 9137 4088 9137 4057 9187
      4052 9190 4041 9208
TIME...MOT...LOC 2306Z 218DEG 58KT 4064 9199 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

Gibbs

187 
WWUS53 KDVN 172309
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
609 PM CDT WED MAY 17 2017

IAC087-101-111-177-MOC045-199-180000-
/O.CON.KDVN.TO.W.0031.000000T0000Z-170518T0000Z/
Henry IA-Van Buren IA-Jefferson IA-Lee IA-Scotland MO-Clark MO-
609 PM CDT WED MAY 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR HENRY...
VAN BUREN...SOUTHEASTERN JEFFERSON...NORTHWESTERN LEE...NORTHEASTERN
SCOTLAND AND NORTHWESTERN CLARK COUNTIES...
    
At 609 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Cantril, or 8 miles south of Keosauqua, moving
northeast at 50 mph.

HAZARD...Tornado and tennis 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...
  Keosauqua around 615 PM CDT. 
  Bonaparte and Bentonsport/Vernon around 620 PM CDT. 
  Stockport around 630 PM CDT. 
  Hillsboro around 635 PM CDT. 
  Salem around 640 PM CDT. 
  Mount Pleasant and Westwood around 645 PM CDT. 
  New London around 650 PM CDT. 
  Winfield and Mount Union around 700 PM CDT. 

Other locations impacted by this tornadic thunderstorm include Henry
County Fairgrounds, Oakland Mills, Glasgow, Morris Park, Mount Zion,
Utica, Heath Memorial Conservation Area, Germanville, Houghton and
Lake Sugema Campground.

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 4066 9218 4116 9172 4116 9137 4088 9137
      4057 9187 4052 9191 4053 9195 4060 9216
TIME...MOT...LOC 2309Z 226DEG 46KT 4062 9197 

TORNADO...RADAR INDICATED
HAIL...2.50IN

$$

Gibbs

768 
WWUS53 KDVN 172314
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
614 PM CDT WED MAY 17 2017

MOC045-199-172324-
/O.CAN.KDVN.TO.W.0031.000000T0000Z-170518T0000Z/
Scotland MO-Clark MO-
614 PM CDT WED MAY 17 2017

...THE TORNADO WARNING FOR NORTHEASTERN SCOTLAND AND NORTHWESTERN
CLARK COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 1100 PM CDT for southeastern
Iowa...and northeastern Missouri.

LAT...LON 4116 9172 4116 9137 4088 9137 4061 9181
      4060 9216 4066 9218
TIME...MOT...LOC 2314Z 219DEG 59KT 4069 9190 

$$

IAC087-101-111-177-180000-
/O.CON.KDVN.TO.W.0031.000000T0000Z-170518T0000Z/
Henry IA-Van Buren IA-Jefferson IA-Lee IA-
614 PM CDT WED MAY 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR HENRY...
VAN BUREN...SOUTHEASTERN JEFFERSON AND NORTHWESTERN LEE COUNTIES...
    
At 614 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Bentonsport/Vernon, or near Keosauqua, moving
northeast at 70 mph.

HAZARD...Tornado and tennis 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...
  Stockport and Hillsboro around 625 PM CDT. 
  Salem around 630 PM CDT. 
  Rome and Westwood around 635 PM CDT. 
  Mount Pleasant around 640 PM CDT. 
  Olds and Mount Union around 645 PM CDT. 
  Winfield around 650 PM CDT. 

Other locations impacted by this tornadic thunderstorm include Henry
County Fairgrounds, Mt Hamill, Oakland Mills, Van Buren County
Fairgrounds, Oakland Mills Park, Mount Pleasant Municipal Arpt,
Keosauqua Airport, Glasgow, Morris Park and Mount Zion.

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 4116 9172 4116 9137 4088 9137 4061 9181
      4060 9216 4066 9218
TIME...MOT...LOC 2314Z 219DEG 59KT 4069 9190 

TORNADO...RADAR INDICATED
HAIL...2.50IN

$$

Gibbs

542 
WWUS53 KDVN 172323
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
623 PM CDT WED MAY 17 2017

IAC087-101-111-177-180000-
/O.CON.KDVN.TO.W.0031.000000T0000Z-170518T0000Z/
Henry IA-Van Buren IA-Jefferson IA-Lee IA-
623 PM CDT WED MAY 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR HENRY...
NORTHEASTERN VAN BUREN...SOUTHEASTERN JEFFERSON AND NORTHWESTERN LEE
COUNTIES...
    
At 622 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Stockport, or 11 miles northeast of Keosauqua,
moving northeast at 55 mph.

HAZARD...Tornado and half dollar 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...
  Lockridge, Rome and Westwood around 630 PM CDT. 
  Mount Pleasant around 635 PM CDT. 
  Wayland and Olds around 640 PM CDT. 
  Winfield around 645 PM CDT. 

Other locations impacted by this tornadic thunderstorm include Henry
County Fairgrounds, Mt Hamill, Oakland Mills, Oakland Mills Park,
Mount Pleasant Municipal Arpt, Glasgow, Morris Park, Mount Zion,
Utica and Merrimac.

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 4116 9172 4116 9137 4088 9137 4066 9172
      4082 9203
TIME...MOT...LOC 2322Z 214DEG 65KT 4084 9178 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

579 
WWUS53 KDVN 172336
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
636 PM CDT WED MAY 17 2017

IAC101-111-177-172345-
/O.CAN.KDVN.TO.W.0031.000000T0000Z-170518T0000Z/
Van Buren IA-Jefferson IA-Lee IA-
636 PM CDT WED MAY 17 2017

...THE TORNADO WARNING FOR NORTHEASTERN VAN BUREN...SOUTHEASTERN
JEFFERSON AND NORTHWESTERN LEE COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 1100 PM CDT for southeastern
Iowa.

LAT...LON 4116 9172 4116 9137 4088 9137 4081 9148
      4081 9172
TIME...MOT...LOC 2335Z 219DEG 54KT 4089 9167 

$$

IAC087-180000-
/O.CON.KDVN.TO.W.0031.000000T0000Z-170518T0000Z/
Henry IA-
636 PM CDT WED MAY 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR HENRY
COUNTY...
    
At 635 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Salem, or 8 miles southwest of Mount Pleasant,
moving northeast at 60 mph.

HAZARD...Tornado and half dollar 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...
  Westwood around 640 PM CDT. 
  Mount Pleasant around 645 PM CDT. 
  Winfield, Olds and Mount Union around 655 PM CDT. 

Other locations impacted by this tornadic thunderstorm include Henry
County Fairgrounds, Water Works Park, Oakland Mills, Oakland Mills
Park, Mount Pleasant Municipal Arpt, Swedesburg, Trenton and
Merrimac.

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 4116 9172 4116 9137 4088 9137 4081 9148
      4081 9172
TIME...MOT...LOC 2335Z 219DEG 54KT 4089 9167 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Gibbs

325 
WWUS53 KDVN 172344
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
644 PM CDT WED MAY 17 2017

IAC087-180000-
/O.CON.KDVN.TO.W.0031.000000T0000Z-170518T0000Z/
Henry IA-
644 PM CDT WED MAY 17 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR HENRY
COUNTY...
    
At 642 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Mount Pleasant, moving northeast at 50 mph.

HAZARD...Tornado and golf ball size hail. 

SOURCE...Radar indicated rotation. Law enforcement reported golf
         ball size hail in Mount Pleasant around 640 PM CDT.

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...
  Olds and Mount Union around 645 PM CDT. 
  Winfield around 650 PM CDT. 

Other locations impacted by this tornadic thunderstorm include Henry
County Fairgrounds, Water Works Park, Oakland Mills, Oakland Mills
Park, Mount Pleasant Municipal Arpt, Swedesburg, Trenton and
Merrimac.

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 4116 9172 4116 9137 4088 9137 4086 9149
      4086 9172
TIME...MOT...LOC 2342Z 216DEG 63KT 4105 9155 

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

$$

132 
WWUS53 KDVN 172353
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
653 PM CDT WED MAY 17 2017

IAC087-180003-
/O.EXP.KDVN.TO.W.0031.000000T0000Z-170518T0000Z/
Henry IA-
653 PM CDT WED MAY 17 2017

...THE TORNADO WARNING FOR HENRY COUNTY WILL EXPIRE AT 700 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However small hail
is still possible with this thunderstorm.

A tornado watch remains in effect until 1100 PM CDT for southeastern
Iowa.

LAT...LON 4116 9172 4116 9137 4088 9137 4086 9149
      4086 9172
TIME...MOT...LOC 2353Z 219DEG 59KT 4117 9142 

$$

Gibbs

The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 1:23 AM CDT	Special Weather Statement	DVN	Benton, Buchanan, Delaware, Iowa, Johnson, Jones and 3 more	37 min
May 17, 8:50 AM CDT	Special Weather Statement	DVN	Scott	25 min
May 17, 3:16 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Buchanan, Linn	43 min
May 17, 3:36 PM CDT	Severe Thunderstorm Warning	DVN	Delaware, Dubuque, Jones, Linn	54 min
May 17, 3:38 PM CDT	Tornado Warning	DVN	Jefferson, Keokuk, Washington	52 min
May 17, 3:45 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Lee, Van Buren	30 min
May 17, 3:49 PM CDT	Tornado Warning	DVN	Henry, Jefferson, Van Buren, Washington	41 min
May 17, 3:55 PM CDT	Tornado Warning	DVN	Des Moines, Henry, Lee, Louisa, Van Buren	50 min
May 17, 4:23 PM CDT	Severe Thunderstorm Warning	DVN	Iowa, Johnson, Washington	44 min
May 17, 4:40 PM CDT	Tornado Warning	DVN	Des Moines, Henry, Louisa, Muscatine	50 min
May 17, 5:03 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Iowa, Keokuk	57 min
May 17, 5:24 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Muscatine, Scott	30 min
May 17, 5:39 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Keokuk, Van Buren, Washington	66 min
May 17, 5:50 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Buchanan, Delaware, Iowa, Johnson, Linn and 1 more	55 min
May 17, 5:54 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Van Buren	51 min
May 17, 6:19 PM CDT	Tornado Warning	DVN	Johnson, Louisa, Washington	41 min
May 17, 6:28 PM CDT	Flash Flood Warning	DVN	Johnson, Linn	3 hr
May 17, 6:31 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Cedar, Clinton, Delaware, Dubuque, Jackson and 5 more	59 min
May 17, 6:32 PM CDT	Tornado Warning Tornado observed	DVN	Delaware, Dubuque, Jones, Linn	43 min
May 17, 6:38 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Louisa, Muscatine, Washington	52 min
May 17, 6:48 PM CDT	Tornado Warning	DVN	Cedar, Johnson, Muscatine	42 min

Nearby

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