Alert archive / Iowa / Tornado Warnings in 2017

Tornado Warning 21, NWS Des Moines, IA

June 28, 2017Adair County, Madison County, Union County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 28, 2017, 5:11 PM CDT for Adair County, Madison County, Union County, Iowa. It was in force for 34 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: Jun 28, 2017, 5:11 PM CDT (22:11 UTC)
Expired: Jun 28, 2017, 5:45 PM CDT
In force: 34 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Adair County, IA, Madison County, IA, Union County, IA

The radar

The Des Moines radar (KDMX), 83 km from the middle of the area, began a volume at 22:10 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
Jun 28, 5:30 PM CDT	FUNNEL CLOUD	5 E Creston, IA
Jun 28, 5:36 PM CDT	FUNNEL CLOUD	Lorimor, IA
Jun 28, 5:54 PM CDT	FUNNEL CLOUD	Lorimor, 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
Jun 28, 2:53 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.2 hours before the alert went out and 171 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.

388 
WFUS53 KDMX 282211
TORDMX
IAC001-121-175-282245-
/O.NEW.KDMX.TO.W.0021.170628T2211Z-170628T2245Z/

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

The National Weather Service in Des Moines  has issued a

* Tornado Warning for...
  Southwestern Madison County in south central Iowa...
  Northern Union County in south central Iowa...
  Southeastern Adair County in southwestern Iowa...

* Until 545 PM CDT.

* At 511 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Green Valley Lake, or near Creston, 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 tornadic thunderstorm will remain over mainly rural areas of
  southwestern Madison...northern Union and southeastern Adair
  Counties, including the following locations: Lorimor, Macksburg,
  Green Valley Lake State Park and Orient.

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 4107 9446 4110 9447 4116 9447 4116 9450
      4138 9403 4106 9401
TIME...MOT...LOC 2211Z 250DEG 27KT 4114 9439 

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

$$

Small

1 follow-up statement

297 
WWUS53 KDMX 282227 RRA
SVSDMX

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

IAC001-121-175-282245-
/O.CON.KDMX.TO.W.0021.000000T0000Z-170628T2245Z/
Madison IA-Union IA-Adair IA-
527 PM CDT WED JUN 28 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR
SOUTHWESTERN MADISON...NORTHEASTERN UNION AND SOUTHEASTERN ADAIR
COUNTIES...
    
At 527 PM CDT, a severe thunderstorm capable of producing a tornado
was located 13 miles east of Green Valley Lake, or 13 miles northeast
of Creston, moving east at 45 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...
Lorimor and Macksburg. 

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 4110 9428 4118 9430 4130 9403 4115 9402
      4109 9401
TIME...MOT...LOC 2227Z 261DEG 41KT 4116 9414 

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

$$

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, 4:56 PM CDT	Tornado Warning Tornado observed	DMX	Adair, Madison	37 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, 5:24 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.