Alert archive / Iowa / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 53, NWS Des Moines, IA

June 22, 2021Carroll County, Greene County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 22, 2021, 6:33 PM CDT for Carroll County, Greene County, Iowa. It was in force for 42 min. 2 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 22, 2021, 6:33 PM CDT (23:33 UTC)
Expired: Jun 22, 2021, 7:15 PM CDT
In force: 42 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Carroll County, IA, Greene County, IA

The radar

The Des Moines radar (KDMX), 73 km from the middle of the area, began a volume at 23:32 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 22, 6:40 PM CDT	HAIL 1.5	Scranton, IA	REPORT VIA SOCIAL MEDIA. TIME ESTIMATED BY RADAR.
Jun 22, 6:50 PM CDT	HAIL 1.25	3 N Bagley, 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 22, 4:49 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 11.6 hours before the alert went out and 168 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1910 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 259 m²/s²
0-3 km storm-relative helicity: 324 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

722 
WUUS53 KDMX 222333
SVRDMX
IAC027-073-230015-
/O.NEW.KDMX.SV.W.0053.210622T2333Z-210623T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
633 PM CDT Tue Jun 22 2021

The National Weather Service in Des Moines  has issued a

* Severe Thunderstorm Warning for...
  Southwestern Greene County in west central Iowa...
  Southeastern Carroll County in west central Iowa...

* Until 715 PM CDT.

* At 633 PM CDT, a severe thunderstorm was located near Glidden, or
  11 miles west of Jefferson, moving southeast at 40 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will remain over mainly rural areas of
  southwestern Greene and southeastern Carroll Counties, including
  the following locations... Ralston and Scranton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4210 9466 4187 9427 4186 9430 4186 9466
      4202 9472
TIME...MOT...LOC 2333Z 325DEG 37KT 4202 9460 

HAIL...1.00IN
WIND...60MPH
 
$$

Krull

4 follow-up statements

913 
WWUS53 KDMX 222339
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
639 PM CDT Tue Jun 22 2021

IAC027-073-230015-
/O.CON.KDMX.SV.W.0053.000000T0000Z-210623T0015Z/
Greene IA-Carroll IA-
639 PM CDT Tue Jun 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR SOUTHWESTERN GREENE AND SOUTHEASTERN CARROLL COUNTIES...

At 639 PM CDT, a severe thunderstorm was located 9 miles northeast of
Coon Rapids, or 9 miles west of Jefferson, moving southeast at 40
mph.

HAZARD...Ping pong 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...
Scranton and Ralston. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4210 9466 4187 9427 4186 9430 4186 9466
      4200 9469
TIME...MOT...LOC 2339Z 324DEG 37KT 4197 9456 

HAIL...1.50IN
WIND...60MPH
 
$$

Krull

755 
WWUS53 KDMX 222345
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
645 PM CDT Tue Jun 22 2021

IAC027-073-230015-
/O.CON.KDMX.SV.W.0053.000000T0000Z-210623T0015Z/
Greene IA-Carroll IA-
645 PM CDT Tue Jun 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR SOUTHWESTERN GREENE AND SOUTHEASTERN CARROLL COUNTIES...

At 644 PM CDT, a severe thunderstorm was located 9 miles east of Coon
Rapids, or 9 miles southwest of Jefferson, moving southeast at 45
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...
Scranton and Ralston. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4210 9466 4187 9427 4186 9430 4186 9466
      4200 9469
TIME...MOT...LOC 2344Z 325DEG 37KT 4192 9451 

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

Krull

989 
WWUS53 KDMX 222356
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
656 PM CDT Tue Jun 22 2021

IAC027-230005-
/O.CAN.KDMX.SV.W.0053.000000T0000Z-210623T0015Z/
Carroll IA-
656 PM CDT Tue Jun 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CARROLL COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
west central Iowa.

LAT...LON 4187 9427 4186 9430 4186 9460 4195 9453
      4201 9450
TIME...MOT...LOC 2355Z 324DEG 35KT 4186 9444 

$$

IAC073-230015-
/O.CON.KDMX.SV.W.0053.000000T0000Z-210623T0015Z/
Greene IA-
656 PM CDT Tue Jun 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR SOUTHWESTERN GREENE COUNTY...

At 655 PM CDT, a severe thunderstorm was located 8 miles north of
Lake Panorama, or 11 miles south of Jefferson, moving southeast at 40
mph.

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

SOURCE...Trained spotter reporets golf ball sized hail.

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 remain over mainly rural areas of
southwestern Greene County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4187 9427 4186 9430 4186 9460 4195 9453
      4201 9450
TIME...MOT...LOC 2355Z 324DEG 35KT 4186 9444 

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

Krull

702 
WWUS53 KDMX 230012
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
712 PM CDT Tue Jun 22 2021

IAC073-230022-
/O.EXP.KDMX.SV.W.0053.000000T0000Z-210623T0015Z/
Greene IA-
712 PM CDT Tue Jun 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN GREENE COUNTY
WILL EXPIRE AT 715 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
west central Iowa.

LAT...LON 4187 9427 4186 9430 4186 9460 4195 9453
      4201 9450
TIME...MOT...LOC 0012Z 325DEG 37KT 4173 9432 

$$

Krull

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 4:59 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk	46 min
Jun 22, 5:22 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Sac	38 min
Jun 22, 5:30 PM CDT	Severe Thunderstorm Warning	DMX	Polk	45 min
Jun 22, 5:50 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun	40 min
Jun 22, 5:52 PM CDT	Special Weather Statement	DMX	Poweshiek	23 min
Jun 22, 5:58 PM CDT	Severe Thunderstorm Warning	DMX	Polk, Warren	47 min
Jun 22, 6:09 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Calhoun, Carroll, Greene, Webster	51 min
Jun 22, 6:30 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Marion, Warren	45 min
Jun 22, 6:42 PM CDT	Special Weather Statement	DMX	Tama	63 min
Jun 22, 6:49 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Guthrie	41 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.