Alert archive / Iowa / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 12, NWS Des Moines, IA

June 18, 2021Lucas County, Monroe County, Wayne County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 18, 2021, 10:39 PM CDT for Lucas County, Monroe County, Wayne County, Iowa. It was in force for 51 min. 8 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 18, 2021, 10:39 PM CDT (03:39 UTC)
Expired: Jun 18, 2021, 11:30 PM CDT
In force: 51 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Lucas County, IA, Monroe County, IA, Wayne County, IA

The radar

The Des Moines radar (KDMX), 91 km from the middle of the area, began a volume at 03:41 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
Jun 18, 10:55 PM CDT	HAIL 1	1 Wnw Chariton, IA	LUCAS COUNTY SHERIFFS OFFICE REPORTED QUARTER SIZED HAIL AT THE OFFICE.
Jun 18, 10:55 PM CDT	HAIL 1	Chariton, IA	LUCAS COUNTY SHERIFFS OFFICE REPORTED QUARTER SIZED HAIL AT THE OFFICE.
Jun 18, 10:55 PM CDT	HAIL 1	Chariton, IA
Jun 18, 10:55 PM CDT	HAIL 2	Chariton, IA	VIA SOCIAL MEDIA/BROADCAST MEDIA.
Jun 18, 10:59 PM CDT	HAIL 0.75	1 Ne Chariton, IA	REPORT FROM MPING: DIME (0.75 IN.).
Jun 18, 11:07 PM CDT	HAIL 2.5	6 S Russell, IA	MOSTLY QUARTER TO GOLF BALL SIZED HAIL WITH SPORADIC TENNIS BALL SIZED HAIL. VIA SOCIAL MEDIA/BROADCAST MEDIA. TIME ESTIMATED FROM RADAR.
Jun 18, 11:12 PM CDT	HAIL 2	5 Ssw Melrose, IA	ALSO REPORTED WIND GUSTS UP TO 65 MPH.
Jun 18, 11:23 PM CDT	HAIL 0.75	1 Nw Chariton, 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 18, 10:08 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.7 hours before the alert went out and 241 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: 4 J/kg
Mixed-layer CIN: -335 J/kg
Mixed-layer LCL: 2572 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

412 
WUUS53 KDMX 190339
SVRDMX
IAC117-135-185-190430-
/O.NEW.KDMX.SV.W.0012.210619T0339Z-210619T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
1039 PM CDT Fri Jun 18 2021

The National Weather Service in Des Moines  has issued a

* Severe Thunderstorm Warning for...
  Western Monroe County in south central Iowa...
  Lucas County in south central Iowa...
  Northeastern Wayne County in south central Iowa...

* Until 1130 PM CDT.

* At 1038 PM CDT, a severe thunderstorm was located 9 miles northwest
  of Chariton, moving east at 30 mph.

  HAZARD...Golf ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Chariton around 1055 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4097 9356 4116 9355 4116 9291 4090 9306
      4090 9310 4085 9310
TIME...MOT...LOC 0338Z 280DEG 26KT 4108 9347 

HAIL...1.75IN
WIND...60MPH
 
$$

Martin

1 follow-up statement

222 
WWUS53 KDMX 190359
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
1059 PM CDT Fri Jun 18 2021

IAC117-135-185-190430-
/O.CON.KDMX.SV.W.0012.000000T0000Z-210619T0430Z/
Monroe IA-Lucas IA-Wayne IA-
1059 PM CDT Fri Jun 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR WESTERN MONROE...LUCAS AND NORTHEASTERN WAYNE COUNTIES...

At 1059 PM CDT, a severe thunderstorm was located over Chariton,
moving east at 30 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
  Rathbun Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4095 9347 4116 9336 4116 9291 4090 9306
      4090 9310 4085 9310
TIME...MOT...LOC 0359Z 284DEG 26KT 4102 9328 

HAIL...1.75IN
WIND...60MPH
 
$$

Martin

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 9:56 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Madison, Marion, Warren	49 min
Jun 18, 10:06 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Clarke, Madison, Union	39 min
Jun 18, 10:43 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Madison, Union, Warren	47 min
Jun 18, 10:45 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Marion, Monroe, Wapello	45 min
Jun 18, 10:54 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Cass	51 min
Jun 18, 11:05 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Marion	25 min
Jun 18, 11:10 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Lucas, Monroe, Wayne	50 min
Jun 18, 11:14 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Madison	46 min
Jun 18, 11:19 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska	26 min
Jun 18, 11:22 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Monroe, Wapello	53 min
Jun 18, 11:25 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Lucas, Wayne	50 min
Jun 18, 11:32 PM CDT	Severe Thunderstorm Warning	DMX	Cass	28 min
Jun 18, 11:37 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Union	53 min
Jun 18, 11:54 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Madison, Warren	36 min
Jun 18, 11:55 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Lucas, Monroe, Wayne	50 min
Jun 18, 11:59 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Clarke, Madison, Ringgold, Union	46 min
Jun 19, 12:13 AM CDT	Severe Thunderstorm Warning	DMX	Adams	26 min
Jun 19, 12:14 AM CDT	Severe Thunderstorm Warning	DMX	Davis, Wapello	31 min
Jun 19, 12:25 AM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Marion, Warren	35 min
Jun 19, 12:29 AM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis	46 min
Jun 19, 12:44 AM CDT	Severe Thunderstorm Warning	DMX	Lucas, Marion, Monroe	31 min
Jun 19, 3:59 AM CDT	Special Weather Statement	DMX	Davis	46 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2021 Every severe thunderstorm warning in 2021

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.