Alert archive / Minnesota / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 66, NWS Twin Cities, MN

May 26, 2026Kandiyohi County, Renville County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 26, 2026, 5:46 AM CDT for Kandiyohi County, Renville County, Minnesota. It was in force for 36 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: May 26, 2026, 5:46 AM CDT (10:46 UTC)
Expired: May 26, 2026, 6:22 AM CDT
In force: 36 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

Counties Kandiyohi County, MN, Renville County, MN

The radar

The Minneapolis radar (KMPX), 128 km from the middle of the area, began a volume at 10:49 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
May 26, 5:57 AM CDT	HAIL 1	1 W Prinsburg, MN	Report from mPING: Quarter (1.00 in.).

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 11 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 10.8 hours before the alert went out and 125 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: 1536 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 1778 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

420 
WUUS53 KMPX 261046
SVRMPX
MNC067-129-261130-
/O.NEW.KMPX.SV.W.0066.260526T1046Z-260526T1130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
546 AM CDT Tue May 26 2026

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southwestern Kandiyohi County in central Minnesota...
  North Central Renville County in central Minnesota...

* Until 630 AM CDT.

* At 546 AM CDT, a severe thunderstorm was located near Prinsburg, or
  20 miles south of Willmar, moving north at 15 mph.

  HAZARD...Half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Prinsburg, Blomkest, Raymond and Svea.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing large hail.

&&

LAT...LON 4489 9524 4499 9525 4504 9525 4502 9495
      4480 9511 4482 9524
TIME...MOT...LOC 1045Z 188DEG 14KT 4486 9517

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Borghoff

3 follow-up statements

859 
WWUS53 KMPX 261100
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
600 AM CDT Tue May 26 2026

MNC067-129-261130-
/O.CON.KMPX.SV.W.0066.000000T0000Z-260526T1130Z/
Kandiyohi MN-Renville MN-
600 AM CDT Tue May 26 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM CDT FOR
SOUTHWESTERN KANDIYOHI AND NORTH CENTRAL RENVILLE COUNTIES...

At 600 AM CDT, a severe thunderstorm was located over Prinsburg, or
16 miles southwest of Willmar, moving north at 20 mph.

HAZARD...Half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
  Prinsburg, Blomkest, Svea and Raymond.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing large hail.

&&

LAT...LON 4489 9524 4497 9525 4504 9525 4502 9498
      4482 9510 4483 9524
TIME...MOT...LOC 1046Z 177DEG 15KT 4487 9519

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Borghoff

149 
WWUS53 KMPX 261116
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
616 AM CDT Tue May 26 2026

MNC067-129-261130-
/O.CON.KMPX.SV.W.0066.000000T0000Z-260526T1130Z/
Kandiyohi MN-Renville MN-
616 AM CDT Tue May 26 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM CDT FOR
SOUTHWESTERN KANDIYOHI AND NORTH CENTRAL RENVILLE COUNTIES...

At 616 AM CDT, a severe thunderstorm was located over Prinsburg and
Raymond, or 14 miles southwest of Willmar, moving north at 15 mph.

HAZARD...Quarter size hail. At 557 AM, the public reported quarter
         size hail in Prinsburg.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
  Prinsburg, Raymond, Blomkest and Svea.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from
windows. These storms are capable of producing large hail.

&&

LAT...LON 4489 9524 4497 9525 4504 9525 4502 9498
      4482 9510 4483 9524
TIME...MOT...LOC 1100Z 182DEG 12KT 4486 9524 4499 9524 4497 9513 4484
9507 4482 9513

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Borghoff

541 
WWUS53 KMPX 261122
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
622 AM CDT Tue May 26 2026

MNC067-129-261132-
/O.CAN.KMPX.SV.W.0066.000000T0000Z-260526T1130Z/
Kandiyohi MN-Renville MN-
622 AM CDT Tue May 26 2026

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR SOUTHWESTERN
KANDIYOHI AND NORTH CENTRAL RENVILLE COUNTIES...

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 has been cancelled. However, heavy rain is
still possible with these thunderstorms.

&&

LAT...LON 4489 9524 4497 9525 4504 9525 4502 9498
      4482 9510 4483 9524
TIME...MOT...LOC 1116Z 182DEG 12KT 4492 9523 4504 9523 4503 9513 4490
9507 4488 9512

$$

Borghoff

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Twin Cities, MN wrote its last area forecast discussion before this severe thunderstorm warning went out at May 26, 2:09 AM CDT, 3 hours 37 minutes earlier. Its key messages:

Warm temperatures continue through the forecast period, with today likely the hottest with low 90s possible.
Chances for thunderstorms through Wednesday, then a prolonged dry pattern sets up.

Area forecast discussion, May 26, 2:09 AM CDT, 3 hours 37 minutes before

Area Forecast Discussion
National Weather Service Twin Cities/Chanhassen MN
209 AM CDT Tue May 26 2026

.KEY MESSAGES...

- Warm temperatures continue through the forecast period, with
  today likely the hottest with low 90s possible.

- Chances for thunderstorms through Wednesday, then a prolonged
  dry pattern sets up.

&&

.DISCUSSION...
Issued at 209 AM CDT Tue May 26 2026

Scattered thunderstorms have developed from eastern Yellow
Medicine County southeastward into north central IA early this
morning on the leading edge of richer pwats. These storms will
continue working northeast during the next several hours toward
the MN River Valley before likely dissipating mid morning. Some
of the storms may contain hail. A boundary shifted north around
midnight and temperatures jumped 5 to 10 degrees quickly behind
it with MSP still sitting at 77 degrees as of 145 AM. It will
be another very warm day today with highs in the upper 80s to
lower 90s. Lower 90s may be more widespread if residual cloud
cover from morning convection is minimized and redevelopment of
convection holds off until late in the day. MUCAPE of 1500-2500
J/kg is expected to develop as the day progresses thanks to
steep mid level lapse rates and pwats increasing to 1.5 inches.
Shear will be quite weak so convection will not be particularly
organized. However, some large hail is possible with the
stronger updrafts given the steep mid lapse rates and moderate
to strong CAPE. Gusty winds are also possible given the
relatively dry layer below 10 kft. Initial development may occur
by mid afternoon. Several outflow boundaries from initial
activity may act as a focus for additional development. Coverage
will peak in the early to mid evening before nocturnal
stabilization begins to decay convection thereafter. A backdoor
cold front will make southwestward progress Wednesday to the
Mississippi River late Wednesday afternoon. Additional
development may occur along it and ahead of it during peak
heating, but coverage will be more isolated than today.

High pressure will build south into the Great Lakes late week
through early next week. Surface winds will shift easterly and
much drier air will work in, ending the shower and thunderstorm
chances for a while. Temperatures will remain warm in the low to
mid 80s each day, ending May on a much warmer note.

&&

.AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/...
Issued at 1246 AM CDT Tue May 26 2026

Isolated thunderstorms have developed at TAF issuance time along
the IA/MN border southwest of MKT. This activity should spread
north overnight toward MKT and RWF and may persist through mid
morning before dissipating. Additional showers and storms are
likely to develop late in the day and this evening, but
coverage, timing, and location are of low confidence so kept any
mention of this round out of the TAFs for now. It may need to be
added for the 12Z issuance if confidence increases.

KMSP...Showers and storms should remain south overnight.
Additional TS may develop at any time later this afternoon and
evening. While the current TAF is optimistic, once details
become a bit clearer TS will likely be introduced in some form
in a future update.

/OUTLOOK FOR KMSP/
WED...VFR. Chc aftn -TSRA. Wind NE 5-10 kts.
THU...VFR. Wind E 5-10 kts.
FRI...VFR. Wind SE 5-10 kts.

&&

.MPX WATCHES/WARNINGS/ADVISORIES...
MN...None.
WI...None.

&&

DISCUSSION...Borghoff
AVIATION...Borghoff

Hazardous weather outlook, May 26, 3:23 AM CDT, 2 hours 23 minutes before

Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
323 AM CDT Tue May 26 2026

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
270830-
Douglas-Todd-Morrison-Mille Lacs-Kanabec-Stevens-Pope-Stearns-
Benton-Sherburne-Isanti-Chisago-Lac Qui Parle-Swift-Chippewa-
Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington-
Yellow Medicine-Renville-McLeod-Sibley-Carver-Scott-Dakota-
Redwood-Brown-Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth-
Waseca-Steele-Martin-Faribault-Freeborn-Polk-Barron-Rusk-
St. Croix-Pierce-Dunn-Pepin-Eau Claire-
323 AM CDT Tue May 26 2026

This Hazardous Weather Outlook is for portions of central and
southern Minnesota, and west central Wisconsin.

.DAY ONE...Today and Tonight.

Scattered thunderstorms are expected to develop this afternoon
that will continue into the evening. A few of these storms could
be severe with wind gusts near 60 mph and hail near 1 inch in
diameter.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation may be needed this afternoon.

In the hours before

Special weather statement, May 26, 5:18 AM CDT, 28 minutes before

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
518 AM CDT Tue May 26 2026

MNZ065-261045-
Renville MN-
518 AM CDT Tue May 26 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTH CENTRAL RENVILLE COUNTY
UNTIL 545 AM CDT...

At 518 AM CDT, Doppler radar was tracking a strong thunderstorm 5
miles southeast of Renville, or 13 miles north of Redwood Falls,
moving northeast at 10 mph.

HAZARD...Penny size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

Locations impacted include...
  Danube.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4467 9517 4474 9526 4485 9512 4475 9501
TIME...MOT...LOC 1018Z 234DEG 10KT 4473 9516

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...<30 MPH

Borghoff

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 26, 5:18 AM CDT	Special Weather Statement	MPX	Renville	27 min
May 26, 5:39 PM CDT	Special Weather Statement	MPX	Morrison	36 min
May 26, 5:46 PM CDT	Special Weather Statement	MPX	Todd	29 min
May 26, 6:46 PM CDT	Special Weather Statement	MPX	Mille Lacs	44 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2026 Every severe thunderstorm warning 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.