Alert archive / Iowa / Tornado Warnings in 2017

Tornado Warning 20, NWS Des Moines, IA

June 28, 2017Adair County, Madison County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 28, 2017, 4:56 PM CDT for Adair County, Madison County, Iowa. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 28, 2017, 4:56 PM CDT (21:56 UTC)
Expired: Jun 28, 2017, 5:33 PM CDT
In force: 37 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Observed
Hail: 1.25 in

Counties Adair County, IA, Madison County, IA

The radar

The Des Moines radar (KDMX), 51 km from the middle of the area, began a volume at 21:57 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 28, 2:53 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 9.9 hours before the alert went out and 191 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: 742 J/kg
Mixed-layer CIN: -297 J/kg
Mixed-layer LCL: 831 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 721 m²/s²
0-3 km storm-relative helicity: 852 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

As transmitted.

075 
WFUS53 KDMX 282156
TORDMX
IAC001-121-282245-
/O.NEW.KDMX.TO.W.0020.170628T2156Z-170628T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Des Moines IA
456 PM CDT WED JUN 28 2017

The National Weather Service in Des Moines  has issued a

* Tornado Warning for...
  Central Madison County in south central Iowa...
  East central Adair County in southwestern Iowa...

* Until 545 PM CDT.

* At 456 PM CDT, a tornado producing storm was located 8 miles east
  of Greenfield, moving east at 30 mph.

  HAZARD...Damaging tornado and half dollar size hail. 

  SOURCE...Radar confirmed tornado. 

  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 storm will be near...
  Winterset around 525 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Bevington, Patterson, Winterset-Madison County Airport, St. Charles
and Badger Creek State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 4133 9434 4150 9390 4151 9379 4125 9379
      4125 9431
TIME...MOT...LOC 2156Z 251DEG 27KT 4130 9429 

TORNADO...OBSERVED
HAIL...1.25IN

$$

Small

2 follow-up statements

312 
WWUS53 KDMX 282216
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
516 PM CDT WED JUN 28 2017

IAC001-121-282245-
/O.CON.KDMX.TO.W.0020.000000T0000Z-170628T2245Z/
Madison IA-Adair IA-
516 PM CDT WED JUN 28 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR CENTRAL
MADISON AND SOUTHEASTERN ADAIR COUNTIES...
    
At 515 PM CDT, a confirmed tornado was located over Winterset, moving
east at 35 mph.

HAZARD...Damaging tornado and quarter size hail. 

SOURCE...Law enforcement confirmed tornado. At 515 pm, a tornado was 
         reported 3 miles southwest of Winterset. 

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 tornado will be near...
  Avenue Of The Saints Event Center around 530 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Bevington, Patterson, Winterset-Madison County Airport, St. Charles
and Badger Creek State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 4131 9419 4150 9390 4151 9379 4125 9379
      4125 9431
TIME...MOT...LOC 2215Z 255DEG 32KT 4134 9402 

TORNADO...OBSERVED
HAIL...1.00IN

$$

Small

404 
WWUS53 KDMX 282233
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
533 PM CDT WED JUN 28 2017

IAC001-121-282242-
/O.CAN.KDMX.TO.W.0020.000000T0000Z-170628T2245Z/
Madison IA-Adair IA-
533 PM CDT WED JUN 28 2017

...THE TORNADO WARNING FOR CENTRAL MADISON AND SOUTHEASTERN ADAIR
COUNTIES IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.  However small hail and heavy rain are still possible
with this thunderstorm.

A tornado watch remains in effect until 1000 PM CDT for south central
and southwestern Iowa.

Remember, a Tornado Warning still remains in effect for 
other portions of southern Madison County until 545pm.


LAT...LON 4131 9419 4150 9390 4151 9379 4125 9379
      4125 9431
TIME...MOT...LOC 2228Z 251DEG 27KT 4138 9385 

$$

Small

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 28, 3:23 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Story	30 min
Jun 28, 3:41 AM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk	23 min
Jun 28, 2:23 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Humboldt, Pocahontas, Webster	52 min
Jun 28, 3:06 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Humboldt, Pocahontas, Webster	39 min
Jun 28, 3:40 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Webster, Wright	50 min
Jun 28, 3:49 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin	41 min
Jun 28, 4:08 PM CDT	Tornado Warning Tornado observed	DMX	Adair, Dallas, Madison	37 min
Jun 28, 4:20 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Madison	40 min
Jun 28, 4:22 PM CDT	Tornado Warning	DMX	Adair, Adams, Cass	23 min
Jun 28, 4:25 PM CDT	Tornado Warning	DMX	Adair, Madison	35 min
Jun 28, 4:28 PM CDT	Tornado Warning Tornado observed	DMX	Adair, Dallas, Guthrie, Madison	32 min
Jun 28, 4:33 PM CDT	Severe Thunderstorm Warning	DMX	Bremer, Butler	42 min
Jun 28, 4:46 PM CDT	Tornado Warning Tornado observed	DMX	Adair, Adams, Union	29 min
Jun 28, 4:49 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison, Polk, Warren	41 min
Jun 28, 4:51 PM CDT	Severe Thunderstorm Warning	DMX	Franklin, Hamilton, Hardin, Webster, Wright	39 min
Jun 28, 4:53 PM CDT	Tornado Warning	DMX	Taylor	52 min
Jun 28, 5:07 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Hardin	38 min
Jun 28, 5:11 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Polk, Story	49 min
Jun 28, 5:11 PM CDT	Tornado Warning	DMX	Adair, Madison, Union	34 min
Jun 28, 5:24 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion, Polk, Warren	24 min
Jun 28, 5:25 PM CDT	Severe Thunderstorm Warning	DMX	Marshall, Story	35 min
Jun 28, 5:35 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Hardin	40 min
Jun 28, 5:39 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Ringgold, Taylor	66 min
Jun 28, 5:41 PM CDT	Tornado Warning	DMX	Clarke, Madison, Union	34 min
Jun 28, 5:52 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Polk, Story	2 min
Jun 28, 5:55 PM CDT	Tornado Warning	DMX	Marion, Warren	35 min
Jun 28, 6:14 PM CDT	Tornado Warning Tornado observed	DMX	Jasper, Marion	31 min
Jun 28, 6:18 PM CDT	Tornado Warning	DMX	Warren	27 min
Jun 28, 6:29 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Union	22 min
Jun 28, 6:29 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy, Tama	46 min
Jun 28, 6:36 PM CDT	Severe Thunderstorm Warning	DMX	Hardin	39 min
Jun 28, 6:44 PM CDT	Tornado Warning Tornado observed	DMX	Marion, Warren	31 min
Jun 28, 6:57 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin, Grundy, Hardin	48 min

Nearby

Tornado Warnings in Iowa, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.