Alert archive / Iowa / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 65, NWS Des Moines, IA

July 9, 2021Ringgold County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 9, 2021, 10:21 PM CDT for Ringgold County, Iowa. It was in force for 39 min. 1 report 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 9, 2021, 10:21 PM CDT (03:21 UTC)
Expired: Jul 9, 2021, 11:00 PM CDT
In force: 39 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Ringgold County, IA

The radar

The Des Moines radar (KDMX), 121 km from the middle of the area, began a volume at 03:23 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 9, 10:24 PM CDT	HAIL 1.5	Mount Ayr, 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
Jul 9, 9:58 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 3.4 hours before the alert went out and 187 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: 2603 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 1447 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 8.1

Open this sounding in Storm Lab

The text

As transmitted.

317 
WUUS53 KDMX 100321
SVRDMX
IAC159-100400-
/O.NEW.KDMX.SV.W.0065.210710T0321Z-210710T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
1021 PM CDT Fri Jul 9 2021

The National Weather Service in Des Moines  has issued a

* Severe Thunderstorm Warning for...
  Central Ringgold County in south central Iowa...

* Until 1100 PM CDT.

* At 1020 PM CDT, a severe thunderstorm was located over Mount Ayr,
  moving southeast at 10 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.

* This severe thunderstorm will be near...
  Mount Ayr around 1025 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4078 9441 4083 9420 4066 9407 4058 9433
TIME...MOT...LOC 0320Z 335DEG 9KT 4073 9425 

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

Ansorge

4 follow-up statements

256 
WWUS53 KDMX 100325
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
1025 PM CDT Fri Jul 9 2021

IAC159-100400-
/O.CON.KDMX.SV.W.0065.000000T0000Z-210710T0400Z/
Ringgold IA-
1025 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT
FOR CENTRAL RINGGOLD COUNTY...

At 1025 PM CDT, a severe thunderstorm was located over Mount Ayr, and
is nearly stationary.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Trained weather spotters reported ping pong size hail at 
         10:24pm in Mt Ayr.

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
central Ringgold County, including the following locations... Mt Ayr
Municipal Airport, Delphos and Benton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4078 9441 4083 9420 4066 9407 4058 9433
TIME...MOT...LOC 0325Z 335DEG 9KT 4072 9424 

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

Ansorge

431 
WWUS53 KDMX 100336
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
1036 PM CDT Fri Jul 9 2021

IAC159-100400-
/O.CON.KDMX.SV.W.0065.000000T0000Z-210710T0400Z/
Ringgold IA-
1036 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT
FOR SOUTHERN RINGGOLD COUNTY...

At 1036 PM CDT, a severe thunderstorm was located just southeast of 
Mount Ayr, moving southeast at 20 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.

Locations impacted include...
Mount Ayr, Benton, Delphos and Mt Ayr Municipal Airport. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4072 9439 4078 9416 4066 9407 4058 9433
TIME...MOT...LOC 0336Z 335DEG 16KT 4067 9424 

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

Ansorge

626 
WWUS53 KDMX 100345
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
1045 PM CDT Fri Jul 9 2021

IAC159-100400-
/O.CON.KDMX.SV.W.0065.000000T0000Z-210710T0400Z/
Ringgold IA-
1045 PM CDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT
FOR SOUTHEASTERN RINGGOLD COUNTY...

At 1044 PM CDT, a severe thunderstorm was located south of Mount 
Ayr, moving southeast at 20 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.

Locations impacted include...
Delphos. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4066 9436 4072 9416 4065 9411 4058 9433
TIME...MOT...LOC 0344Z 335DEG 16KT 4064 9422 

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

Ansorge

136 
WWUS53 KDMX 100359
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
1059 PM CDT Fri Jul 9 2021

IAC159-100405-
/O.EXP.KDMX.SV.W.0065.000000T0000Z-210710T0400Z/
Ringgold IA-
1059 PM CDT Fri Jul 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN RINGGOLD COUNTY
WILL EXPIRE AT 1100 PM CDT...
        
The storm which prompted the warning is moving out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 500 AM CDT for
south central Iowa.

LAT...LON 4066 9436 4072 9416 4065 9411 4058 9433
TIME...MOT...LOC 0355Z 335DEG 9KT 4062 9421 

$$

Ansorge

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 9:16 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold	44 min
Jul 9, 9:31 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Ringgold, Union	15 min
Jul 9, 9:38 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold	52 min
Jul 9, 11:41 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Cass	49 min
Jul 9, 11:56 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass	49 min
Jul 10, 12:41 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass, Ringgold, Taylor, Union	64 min
Jul 10, 2:49 PM CDT	Special Weather Statement	DMX	Carroll, Crawford, Sac	56 min
Jul 10, 4:36 PM CDT	Tornado Warning	DMX	Dallas, Guthrie	24 min
Jul 10, 5:00 PM CDT	Tornado Warning	DMX	Dallas	30 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.