Alert archive / Iowa / Tornado Warnings in 2018

Tornado Warning 16, NWS Quad Cities, IA

July 19, 2018Van Buren County, Iowa

NWS Quad Cities, IA issued this tornado warning at Jul 19, 2018, 5:59 PM CDT for Van Buren County, Iowa. It was in force for 44 min. 6 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: Jul 19, 2018, 5:59 PM CDT (22:59 UTC)
Expired: Jul 19, 2018, 6:43 PM CDT
In force: 44 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Van Buren County, IA

The radar

The Quad Cities radar (KDVN), 148 km from the middle of the area, began a volume at 23:03 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
Jul 19, 6:07 PM CDT	TORNADO	4.9 N Keosauqua, IA	AN EF-1 TORNADO DAMAGED A SMALL FARM OUTBUILDING AND TRACKED THROUGH A CORN FIELD AND TREES, FINALLY ENDING AND DESTROYING A LARGE HISTORIC STONE BARN.
Jul 19, 6:09 PM CDT	TSTM WND DMG	1 Nw Keosauqua Airport, IA	DELAYED REPORT AND TIME ESTIMATED FROM RADAR. CONSIDERABLE DAMAGE TO BUILDINGS AT THE FAIRGROUNDS. GAS PUMPS BLOWN OVER AND A BUILDING DAMAGED AT A COUNTY FACILITY NEXT TO THE FAIRGROUNDS.
Jul 19, 6:09 PM CDT	TORNADO	1.2 Nne Keosauqua, IA	AN EF-1 TORNADO TOUCHED DOWN JUST NORTH OF KEOSAUQUA DESTROYING SEVERAL LARGE FARM OUTBUILDINGS AND EQUIPMENT. CORN CROP DAMAGE WAS ALSO FOUND.
Jul 19, 6:30 PM CDT	TSTM WND DMG	3 W Indian Lake Park, IA	DELAYED REPORT AND TIME ESTIMATED FROM RADAR. THREE OUTBUILDINGS DOWN ON PROPERTY.
Jul 19, 6:34 PM CDT	TSTM WND DMG	Farmington, IA	DELAYED REPORT AND TIME ESTIMATED FROM RADAR. NUMEROUS LARGE OAK TREES DOWN IN TOWN. ROOF OF BUILDING PEELED BACK.
Jul 19, 6:38 PM CDT	HAIL 0.75	1 Ese Lacey Keosauqua S, IA	DIME SIZED HAIL.

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
Jul 19, 3:11 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.0 hours before the alert went out and 154 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1807 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: -21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

350 
WFUS53 KDVN 192259
TORDVN
IAC177-200000-
/O.NEW.KDVN.TO.W.0016.180719T2259Z-180720T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
559 PM CDT THU JUL 19 2018

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Van Buren County in southeastern Iowa...

* Until 700 PM CDT.
    
* At 558 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Douds, or 11 miles northwest of Keosauqua, moving
  southeast 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...
  Birmingham around 610 PM CDT.
  Keosauqua around 620 PM CDT.
  Bentonsport/Vernon around 630 PM CDT.
  Bonaparte around 635 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Lebanon, Indian Lake Park, Van Buren County Fairgrounds, Lake Sugema
Campground, Keosauqua Airport, Lacey Keosauqua State Park, Mount
Sterling, Farmington, Mount Zion and Utica.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm has a history of producing damaging tornadoes. 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 4090 9218 4090 9185 4081 9172 4061 9172
      4061 9173 4060 9202 4075 9218
TIME...MOT...LOC 2258Z 308DEG 26KT 4085 9211 

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

$$

Gibbs

5 follow-up statements

364 
WWUS53 KDVN 192308
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
608 PM CDT THU JUL 19 2018

IAC177-200000-
/O.CON.KDVN.TO.W.0016.000000T0000Z-180720T0000Z/
Van Buren IA-
608 PM CDT THU JUL 19 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR VAN BUREN
COUNTY...
    
At 607 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Keosauqua, moving southeast 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...
  Keosauqua around 615 PM CDT.
  Bentonsport/Vernon around 625 PM CDT.
  Bonaparte around 630 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Lebanon, Indian Lake Park, Van Buren County Fairgrounds, Lake Sugema
Campground, Keosauqua Airport, Lacey Keosauqua State Park, Mount
Sterling, Farmington, Mount Zion and Utica.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm has a history of producing damaging tornadoes. TAKE COVER 
NOW! 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 4090 9218 4090 9185 4081 9172 4061 9172
      4061 9173 4060 9202 4075 9218
TIME...MOT...LOC 2307Z 308DEG 27KT 4077 9202 

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

$$

Gibbs

749 
WWUS53 KDVN 192318
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
618 PM CDT THU JUL 19 2018

IAC177-200000-
/O.CON.KDVN.TO.W.0016.000000T0000Z-180720T0000Z/
Van Buren IA-
618 PM CDT THU JUL 19 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR VAN BUREN
COUNTY...
    
At 618 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Bentonsport/Vernon, or near Keosauqua, moving
southeast 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...
  Bonaparte around 625 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Lebanon, Indian Lake Park, Van Buren County Fairgrounds, Lake Sugema
Campground, Keosauqua Airport, Lacey Keosauqua State Park, Mount
Sterling, Farmington, Mount Zion and Utica.

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 4086 9208 4090 9185 4081 9172 4061 9172
      4061 9173 4060 9202 4075 9218 4083 9218
TIME...MOT...LOC 2318Z 308DEG 27KT 4068 9191 

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

$$

Gibbs

043 
WWUS53 KDVN 192329
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
629 PM CDT THU JUL 19 2018

IAC177-200000-
/O.CON.KDVN.TO.W.0016.000000T0000Z-180720T0000Z/
Van Buren IA-
629 PM CDT THU JUL 19 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR VAN BUREN
COUNTY...
    
At 629 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Bonaparte, or 9 miles southeast of Keosauqua, moving
southeast at 40 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 tornadic thunderstorm will remain over mainly rural areas of Van
Buren County, including the following locations... Lebanon, Indian
Lake Park, Van Buren County Fairgrounds, Lake Sugema Campground,
Keosauqua Airport, Lacey Keosauqua State Park, Mount Sterling,
Farmington, Mount Zion and Utica.

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 4081 9173 4061 9172 4061 9173 4060 9202
      4075 9218 4087 9181
TIME...MOT...LOC 2329Z 329DEG 34KT 4064 9182 

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

$$

Gibbs

502 
WWUS53 KDVN 192335
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
635 PM CDT THU JUL 19 2018

IAC177-200000-
/O.CON.KDVN.TO.W.0016.000000T0000Z-180720T0000Z/
Van Buren IA-
635 PM CDT THU JUL 19 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR SOUTHERN
VAN BUREN COUNTY...
    
At 634 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Croton, or 12 miles southeast of Keosauqua, moving
southeast 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.

Locations impacted include...
Keosauqua, Bonaparte, Cantril, Bentonsport/Vernon, Farmington, Mount
Sterling, Indian Lake Park, Lake Sugema Campground and Lacey
Keosauqua State 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 4061 9172 4061 9173 4060 9202 4072 9215
      4073 9197 4081 9173
TIME...MOT...LOC 2334Z 308DEG 26KT 4061 9178 

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

$$

Gibbs

786 
WWUS53 KDVN 192343
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
643 PM CDT THU JUL 19 2018

IAC177-192353-
/O.CAN.KDVN.TO.W.0016.000000T0000Z-180720T0000Z/
Van Buren IA-
643 PM CDT THU JUL 19 2018

...THE TORNADO WARNING FOR SOUTHERN VAN BUREN COUNTY IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

A Tornado Watch remains in effect until 1000 PM CDT for southeastern
Iowa...and northeastern Missouri.

LAT...LON 4061 9172 4061 9173 4060 9202 4072 9215
      4073 9197 4081 9173
TIME...MOT...LOC 2340Z 308DEG 26KT 4057 9171 

$$

Gibbs

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 3:44 AM CDT	Special Weather Statement	DVN	Keokuk	61 min
Jul 19, 6:50 AM CDT	Special Weather Statement	DVN	Iowa	40 min
Jul 19, 2:53 PM CDT	Special Weather Statement	DVN	Linn	37 min
Jul 19, 3:22 PM CDT	Special Weather Statement	DVN	Jones	53 min
Jul 19, 4:05 PM CDT	Severe Thunderstorm Warning	DVN	Jones	25 min
Jul 19, 4:39 PM CDT	Special Weather Statement	DVN	Jackson	66 min
Jul 19, 4:50 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Jackson, Jones	25 min
Jul 19, 4:54 PM CDT	Tornado Warning	DVN	Keokuk	51 min
Jul 19, 5:26 PM CDT	Tornado Warning	DVN	Jefferson, Van Buren	49 min
Jul 19, 6:23 PM CDT	Tornado Warning	DVN	Lee, Van Buren	67 min

Nearby

Tornado Warnings in Iowa, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.