Alert archive / Iowa / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 27, NWS Sioux Falls, SD

June 16, 2021Ida County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 16, 2021, 9:47 PM CDT for Ida County, Iowa. It was in force for 28 min. 4 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 16, 2021, 9:47 PM CDT (02:47 UTC)
Expired: Jun 16, 2021, 10:15 PM CDT
In force: 28 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Ida County, IA

The radar

The Omaha radar (KOAX), 135 km from the middle of the area, began a volume at 02:49 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, 9:52 PM CDT	HAIL 0.75	5 N Ida Grove, IA	REPORT FROM MPING.
Jun 16, 10:00 PM CDT	HAIL 1.25	Ida Grove, IA	REPORT VIA SOCIAL MEDIA.
Jun 16, 10:02 PM CDT	HAIL 1	Ida Grove, IA	REPORT FROM MPING.
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, 2.8 hours before the alert went out and 135 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.

288 
WUUS53 KFSD 170247
SVRFSD
IAC093-170315-
/O.NEW.KFSD.SV.W.0027.210617T0247Z-210617T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
947 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 1015 PM CDT.

* At 947 PM CDT, a severe thunderstorm was located near Ida Grove,
  moving south at 55 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 be near...
  Ida Grove around 950 PM CDT.
  Arthur around 955 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4227 9559 4245 9559 4247 9533 4245 9532
      4221 9533 4221 9558
TIME...MOT...LOC 0247Z 341DEG 48KT 4239 9549 

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

APT

1 follow-up statement

967 
WWUS53 KFSD 170313
SVSFSD

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

IAC093-170323-
/O.EXP.KFSD.SV.W.0027.000000T0000Z-210617T0315Z/
Ida IA-
1013 PM CDT Wed Jun 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN IDA COUNTY WILL
EXPIRE AT 1015 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

LAT...LON 4227 9559 4245 9559 4247 9533 4245 9532
      4221 9533 4221 9558
TIME...MOT...LOC 0313Z 341DEG 48KT 4207 9534 

$$

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, 10:04 PM CDT	Severe Thunderstorm Warning	FSD	Ida	9 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.