Alert archive / Iowa / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 28, NWS Sioux Falls, SD

June 16, 2021Ida County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 16, 2021, 10:04 PM CDT for Ida County, Iowa. It was in force for 9 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: Jun 16, 2021, 10:04 PM CDT (03:04 UTC)
Expired: Jun 16, 2021, 10:13 PM CDT
In force: 9 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Ida County, IA

The radar

The Omaha radar (KOAX), 129 km from the middle of the area, began a volume at 03:08 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 16, 10:04 PM CDT	HAIL 0.7	2 Se Ida Grove, IA	WINDS GUSTING UP TO AROUND 40 MPH PRECEDED HAIL UP TO DIME SIZED.

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 00:00Z, 3.1 hours before the alert went out and 129 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: 2997 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 1946 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 435 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 27.9

Open this sounding in Storm Lab

The text

As transmitted.

964 
WUUS53 KFSD 170304
SVRFSD
IAC093-170330-
/O.NEW.KFSD.SV.W.0028.210617T0304Z-210617T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
1004 PM CDT Wed Jun 16 2021

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Southeastern Ida County in west central Iowa...

* Until 1030 PM CDT.

* At 1004 PM CDT, a severe thunderstorm was located near Ida Grove,
  moving south at 30 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Public. At 10:00 pm, half-dollar sized hail was reported 
           in Ida Grove, Iowa.

  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
  southeastern Ida County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4227 9559 4235 9559 4238 9532 4221 9533
      4221 9558
TIME...MOT...LOC 0304Z 341DEG 27KT 4228 9544 

HAIL...1.25IN
WIND...60MPH
 
$$

APT

1 follow-up statement

297 
WWUS53 KFSD 170313 RRA
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
1013 PM CDT Wed Jun 16 2021

IAC093-170323-
/O.CAN.KFSD.SV.W.0028.000000T0000Z-210617T0330Z/
Ida IA-
1013 PM CDT Wed Jun 16 2021

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

LAT...LON 4227 9559 4235 9559 4238 9532 4221 9533
      4221 9558
TIME...MOT...LOC 0312Z 341DEG 27KT 4221 9541 

$$

APT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 8:38 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, Clay, O'Brien	37 min
Jun 16, 9:00 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, Ida	45 min
Jun 16, 9:47 PM CDT	Severe Thunderstorm Warning	FSD	Ida	28 min
Jun 17, 3:00 AM CDT	Heat Advisory	FSD	Buena Vista, Cherokee, Ida, Woodbury	16 hr

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.