Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 117, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 16, 2021, 6:40 PM CDT for 4 counties in Minnesota. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 16, 2021, 6:40 PM CDT (23:40 UTC)
- Expired
- Sep 16, 2021, 7:15 PM CDT
- In force
- 35 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Chippewa County, MN, Lac qui Parle County, MN, Renville County, MN, Yellow Medicine County, MN
The radar
The Minneapolis radar (KMPX), 157 km from the middle of the area, began a volume at 23:39 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 16, 6:39 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 11.7 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1213 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 362 m²/s²
- 0-3 km storm-relative helicity
- 428 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
The text
As transmitted.
899
WUUS53 KMPX 162340
SVRMPX
MNC023-073-129-173-170015-
/O.NEW.KMPX.SV.W.0117.210916T2340Z-210917T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
640 PM CDT Thu Sep 16 2021
The National Weather Service in the Twin Cities has issued a
* Severe Thunderstorm Warning for...
Southeastern Lac qui Parle County in west central Minnesota...
Eastern Chippewa County in west central Minnesota...
Northeastern Yellow Medicine County in west central Minnesota...
Northwestern Renville County in central Minnesota...
* Until 715 PM CDT.
* At 640 PM CDT, a severe thunderstorm was located over Clarkfield,
or 9 miles southwest of Montevideo, moving northeast at 50 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...
Montevideo around 650 PM CDT.
Granite Falls around 655 PM CDT.
Maynard around 700 PM CDT.
Other locations in the path of this severe thunderstorm include Clara
City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4484 9598 4513 9537 4497 9525 4490 9525
4489 9519 4468 9586
TIME...MOT...LOC 2340Z 241DEG 42KT 4482 9579
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
NDC1 follow-up statement
998
WWUS53 KMPX 162354
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
654 PM CDT Thu Sep 16 2021
MNC073-170003-
/O.CAN.KMPX.SV.W.0117.000000T0000Z-210917T0015Z/
Lac qui Parle MN-
654 PM CDT Thu Sep 16 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LAC QUI PARLE
COUNTY IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
central and west central Minnesota.
LAT...LON 4490 9574 4493 9573 4494 9576 4513 9537
4497 9525 4490 9525 4489 9519 4472 9572
4489 9578
TIME...MOT...LOC 2353Z 241DEG 42KT 4490 9559
$$
MNC023-129-173-170015-
/O.CON.KMPX.SV.W.0117.000000T0000Z-210917T0015Z/
Chippewa MN-Yellow Medicine MN-Renville MN-
654 PM CDT Thu Sep 16 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR EASTERN CHIPPEWA...NORTHEASTERN YELLOW MEDICINE AND NORTHWESTERN
RENVILLE COUNTIES...
At 653 PM CDT, a severe thunderstorm was located 6 miles west of
Maynard, or 6 miles southeast of Montevideo, moving northeast at 50
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 storm will be near...
Maynard around 700 PM CDT.
Other locations in the path of this severe thunderstorm include Clara
City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4490 9574 4493 9573 4494 9576 4513 9537
4497 9525 4490 9525 4489 9519 4472 9572
4489 9578
TIME...MOT...LOC 2353Z 241DEG 42KT 4490 9559
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
BPHThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 16, 5:45 PM CDT | Tornado Warning | MPX | Morrison, Todd | 33 min |
| Sep 16, 6:14 PM CDT | Special Weather Statement | MPX | Morrison | 31 min |
| Sep 16, 6:25 PM CDT | Severe Thunderstorm Warning | MPX | Morrison | 35 min |
| Sep 16, 6:26 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Morrison, Stearns | 49 min |
| Sep 16, 6:30 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Kandiyohi, Swift | 45 min |
| Sep 16, 6:32 PM CDT | Special Weather Statement | MPX | Stearns | 43 min |
| Sep 16, 6:32 PM CDT | Tornado Warning | MPX | Mille Lacs, Morrison | 43 min |
| Sep 16, 6:48 PM CDT | Severe Thunderstorm Warning | MPX | Stearns | 42 min |
Nearby
Severe 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.