Alert archive / Minnesota / Tornado Warnings in 2026
Tornado Warning 23, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Sep 11, 2026, 7:46 PM CDT for Stevens County, Minnesota. It was in force for 23 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
- Sep 11, 2026, 7:46 PM CDT (00:46 UTC)
- Expired
- Sep 11, 2026, 8:09 PM CDT
- In force
- 23 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Tornado
- Observed
- Hail
- 0.0 in
County Stevens County, MN
The radar
The Aberdeen radar (KABR), 178 km from the middle of the area, began a volume at 00:48 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 |
|---|---|---|---|
| Sep 11, 7:50 PM CDT | NON-TSTM WND DMG | 8 S Alberta, MN | 8 power poles blocking county highway 9 near Trinity Lutheran Cemetery, likely caused by severe winds from the rear flank downdraft. |
| Sep 11, 7:50 PM CDT | TORNADO | 8 S Alberta, MN | 8 power poles blocking county highway 9 near Trinity Lutheran Cemetery. |
| Sep 11, 7:51 PM CDT | TORNADO | 7 Ne Artichoke, MN | Tornado touchdown reported 7 miles northeast of Artichoke. Location estimated. |
| Sep 11, 7:53 PM CDT | HAIL 1.75 | 5 E Artichoke, MN | Report from mPING: Golf Ball (1.75 in.). |
| Sep 11, 7:54 PM CDT | HAIL 1.75 | 7 S Alberta, MN | Golf ball sized hail 8 miles northeast of Artichoke MN reported by Trained Spotter. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 11, 6:39 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 0.8 hours before the alert went out and 189 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
- 1015 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 1133 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -85 m²/s²
- 0-3 km storm-relative helicity
- -56 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.1
The text
As transmitted.
066
WFUS53 KMPX 120046
TORMPX
MNC149-120115-
/O.NEW.KMPX.TO.W.0023.260912T0046Z-260912T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
746 PM CDT Fri Sep 11 2026
The National Weather Service in the Twin Cities has issued a
* Tornado Warning for...
Southwestern Stevens County in west central Minnesota...
* Until 815 PM CDT.
* At 746 PM CDT, a confirmed tornado was located near Lake Hattie, or
12 miles southwest of Morris, moving southeast at 10 mph.
HAZARD...Damaging tornado.
SOURCE...Weather spotters confirmed tornado.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows and vehicles will occur. Tree damage is
likely.
* This tornado will be near...
Lake Hattie around 750 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to an interior room on the lowest floor of a well-built building
away from windows. If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter and protect yourself
from flying debris.
&&
LAT...LON 4551 9624 4556 9606 4541 9588 4541 9624
TIME...MOT...LOC 0046Z 322DEG 6KT 4547 9609
TORNADO...OBSERVED
MAX HAIL SIZE...0.00 IN
$$
ETA2 follow-up statements
991
WWUS53 KMPX 120051 RRA
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
751 PM CDT Fri Sep 11 2026
MNC149-120115-
/O.CON.KMPX.TO.W.0023.000000T0000Z-260912T0115Z/
Stevens MN-
751 PM CDT Fri Sep 11 2026
...TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR
SOUTHWESTERN STEVENS COUNTY...
At 751 PM CDT, a confirmed tornado was located near Lake Hattie, or
12 miles southwest of Morris, moving southeast at 10 mph.
HAZARD...Damaging tornado and tennis ball size hail.
SOURCE...Weather spotters confirmed tornado.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows and vehicles will occur. Tree damage is
likely.
This tornadic storm will remain over mainly rural areas of
Southwestern Stevens County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to an interior room on the lowest floor of a well-built building
away from windows. If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter and protect yourself
from flying debris.
&&
LAT...LON 4551 9624 4556 9606 4541 9588 4541 9624
TIME...MOT...LOC 0046Z 322DEG 6KT 4547 9609
TORNADO...OBSERVED
MAX HAIL SIZE...2.50 IN
$$
ETA013 WWUS53 KMPX 120109 SVSMPX Severe Weather Statement National Weather Service Twin Cities/Chanhassen MN 809 PM CDT Fri Sep 11 2026 MNC149-120119- /O.CAN.KMPX.TO.W.0023.000000T0000Z-260912T0115Z/ Stevens MN- 809 PM CDT Fri Sep 11 2026 ...TORNADO WARNING IS CANCELLED FOR SOUTHWESTERN STEVENS COUNTY... The storm which prompted the warning has moved out of the area. Therefore, the warning has been cancelled. To report severe weather, contact your nearest law enforcement agency. They will send your report to the National Weather Service office. A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for a portion of west central Minnesota. && LAT...LON 4551 9624 4556 9606 4541 9588 4541 9624 TIME...MOT...LOC 0051Z 289DEG 22KT 4549 9607 $$ ETA
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 7:41 PM CDT | Severe Thunderstorm Warning | MPX | Stevens | 38 min |
| Sep 11, 8:04 PM CDT | Tornado Warning | MPX | Stevens | 18 min |
| Sep 11, 8:32 PM CDT | Severe Thunderstorm Warning | MPX | Stevens, Swift | 16 min |
| Sep 11, 9:09 PM CDT | Severe Thunderstorm Warning | MPX | Kandiyohi, Pope, Swift | 18 min |
Nearby
Tornado Warnings in Minnesota, 2026Every tornado warning in 2026Tornadoes in 2026
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.