Alert archive / Iowa / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 30, NWS Sioux Falls, SD

June 22, 20214 counties in Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 22, 2021, 6:24 PM CDT for 4 counties in Iowa. It was in force for 36 min. 5 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, 6:24 PM CDT (23:24 UTC)
Expired
Jun 22, 2021, 7:00 PM CDT
In force
36 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon
Hail
1.75 in
Wind
60.0 mph

Counties Cherokee County, IA, Ida County, IA, Plymouth County, IA, Woodbury County, IA

The radar

The Sioux Falls radar (KFSD), 121 km from the middle of the area, began a volume at 23:24 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

TimeReportWhereRemark
Jun 22, 6:34 PM CDTFUNNEL CLOUD7 N Kingsley, IAPUBLIC REPORT OF A FUNNEL CLOUD.
Jun 22, 6:34 PM CDTHAIL 13 Nne Kingsley, IAHAIL OF AT LEAST QUARTER SIZE REPORTED. CROPS SEVERELY DAMAGED BY HAIL.
Jun 22, 6:38 PM CDTHAIL 14 N Pierson, IASIGNIFICANT HAIL DAMAGE TO CROPS.
Jun 22, 6:48 PM CDTHAIL 1.75Pierson, IATRAINED SPOTTER REPORT OF GOLF BALL SIZE HAIL.
Jun 22, 6:55 PM CDTHAIL 1.254 N Correctionville, IAPUBLIC REPORT OF HALF DOLLAR SIZE HAIL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 11.4 hours before the alert went out and 154 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-pSkew-T log-p diagram, Omaha, NE at 12:00Z on 2021-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 12:00Z on 2021-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 259 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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.

193 
WUUS53 KFSD 222324
SVRFSD
IAC035-093-149-193-230000-
/O.NEW.KFSD.SV.W.0030.210622T2324Z-210623T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
624 PM CDT Tue Jun 22 2021

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Southwestern Cherokee County in northwestern Iowa...
  Northeastern Woodbury County in west central Iowa...
  Southeastern Plymouth County in northwestern Iowa...
  Northwestern Ida County in west central Iowa...

* Until 700 PM CDT.

* At 624 PM CDT, a severe thunderstorm was located near Kingsley, or
  14 miles southeast of Le Mars, moving southeast 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...
  Pierson around 640 PM CDT.
  Washta around 645 PM CDT.
  Correctionville around 650 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to shelter inside a strong building,  and stay away from
windows.

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Sioux Falls.

&&

LAT...LON 4268 9611 4275 9605 4278 9593 4268 9559
      4245 9579
TIME...MOT...LOC 2324Z 310DEG 26KT 4265 9594 

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

BP
2 follow-up statements
320 
WWUS53 KFSD 222344
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
644 PM CDT Tue Jun 22 2021

IAC035-093-149-193-230000-
/O.CON.KFSD.SV.W.0030.000000T0000Z-210623T0000Z/
Cherokee IA-Woodbury IA-Plymouth IA-Ida IA-
644 PM CDT Tue Jun 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR SOUTHWESTERN CHEROKEE...NORTHEASTERN WOODBURY...SOUTHEASTERN
PLYMOUTH AND NORTHWESTERN IDA COUNTIES...

At 644 PM CDT, a severe thunderstorm was located over Pierson, or 20
miles southwest of Cherokee, moving south at 20 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...
  Correctionville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Sioux Falls.

&&

LAT...LON 4259 9599 4268 9587 4261 9565 4245 9579
TIME...MOT...LOC 2344Z 341DEG 19KT 4255 9586 

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

BP
740 
WWUS53 KFSD 222356
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
656 PM CDT Tue Jun 22 2021

IAC035-093-149-193-230005-
/O.EXP.KFSD.SV.W.0030.000000T0000Z-210623T0000Z/
Cherokee IA-Woodbury IA-Plymouth IA-Ida IA-
656 PM CDT Tue Jun 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CHEROKEE...
NORTHEASTERN WOODBURY...SOUTHEASTERN PLYMOUTH AND NORTHWESTERN IDA
COUNTIES WILL EXPIRE AT 700 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Sioux Falls.

Remember, a Severe Thunderstorm Warning still remains in effect for
northeast Woodbury and northwest Ida County until 800 PM CDT.

LAT...LON 4259 9599 4268 9587 4261 9565 4245 9579
TIME...MOT...LOC 2355Z 310DEG 26KT 4251 9580 

$$

BP

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 22, 6:09 PM CDTSevere Thunderstorm WarningFSDCherokee, Ida, Plymouth, Woodbury36 min
Jun 22, 6:52 PM CDTSevere Thunderstorm WarningFSDCherokee, Ida, Plymouth, Woodbury24 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2021Every 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.