Alert archive / Iowa / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 22, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 16, 2021, 6:31 PM CDT for Lyon County, Osceola County, Iowa; Nobles County, Minnesota. It was in force for 29 min. 3 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, 6:31 PM CDT (23:31 UTC)
- Expired
- Jun 16, 2021, 7:00 PM CDT
- In force
- 29 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Lyon County, IA, Osceola County, IA, Nobles County, MN
The radar
The Sioux Falls radar (KFSD), 69 km from the middle of the area, began a volume at 23:30 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, 6:33 PM CDT | HAIL 1 | 5 Sw Rushmore, MN | DELAYED REPORT. TIME ESTIMATED OFF RADAR. |
| Jun 16, 6:40 PM CDT | HAIL 0.5 | 5 Wnw Bigelow, MN | |
| Jun 16, 6:44 PM CDT | HAIL 0.7 | 6 Ssw Rushmore, MN | DELAYED REPORT. ALSO GOT 0.5 OF RAIN. TIME ESTIMATED OFF RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 11.5 hours before the alert went out and 233 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1541 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
996 WUUS53 KFSD 162331 SVRFSD IAC119-143-MNC105-170000- /O.NEW.KFSD.SV.W.0022.210616T2331Z-210617T0000Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Sioux Falls SD 631 PM CDT Wed Jun 16 2021 The National Weather Service in Sioux Falls has issued a * Severe Thunderstorm Warning for... Northeastern Lyon County in northwestern Iowa... Northwestern Osceola County in northwestern Iowa... Southwestern Nobles County in southwestern Minnesota... * Until 700 PM CDT. * At 630 PM CDT, a severe thunderstorm was located near Adrian, or 14 miles northwest of Sibley, moving south at 30 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * This severe thunderstorm will be near... Little Rock around 650 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4363 9597 4365 9584 4343 9566 4337 9595 TIME...MOT...LOC 2330Z 340DEG 28KT 4359 9590 HAIL...1.00IN WIND...<50MPH $$ APT
2 follow-up statements
587
WWUS53 KFSD 162342
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
642 PM CDT Wed Jun 16 2021
IAC119-162351-
/O.CAN.KFSD.SV.W.0022.000000T0000Z-210617T0000Z/
Lyon IA-
642 PM CDT Wed Jun 16 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LYON COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4340 9583 4339 9585 4355 9587 4358 9578
4343 9566
TIME...MOT...LOC 2341Z 340DEG 28KT 4350 9586
$$
IAC143-MNC105-170000-
/O.CON.KFSD.SV.W.0022.000000T0000Z-210617T0000Z/
Osceola IA-Nobles MN-
642 PM CDT Wed Jun 16 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR NORTHWESTERN OSCEOLA AND SOUTH CENTRAL NOBLES COUNTIES...
At 641 PM CDT, a severe thunderstorm was located near Little Rock, or
9 miles northwest of Sibley, moving south at 30 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
This severe thunderstorm will remain over mainly rural areas of
northwestern Osceola and south central Nobles Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4340 9583 4339 9585 4355 9587 4358 9578
4343 9566
TIME...MOT...LOC 2341Z 340DEG 28KT 4350 9586
HAIL...1.00IN
WIND...<50MPH
$$
APT165
WWUS53 KFSD 162356
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
656 PM CDT Wed Jun 16 2021
IAC143-MNC105-170006-
/O.EXP.KFSD.SV.W.0022.000000T0000Z-210617T0000Z/
Osceola IA-Nobles MN-
656 PM CDT Wed Jun 16 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN OSCEOLA AND SOUTH
CENTRAL NOBLES COUNTIES WILL EXPIRE AT 700 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However heavy rain
is still possible with this thunderstorm.
LAT...LON 4340 9583 4339 9585 4355 9587 4358 9578
4343 9566
TIME...MOT...LOC 2356Z 326DEG 31KT 4344 9572
$$
APTThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 6:51 PM CDT | Severe Thunderstorm Warning | FSD | Murray, Nobles, Pipestone | 24 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2021Severe Thunderstorm Warnings in Minnesota, 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.