Severe Thunderstorm Warning 117, NWS Twin Cities, MN

452 
WWUS53 KMPX 211937
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
237 PM CDT Mon Jul 21 2025

MNC013-079-211947-
/O.CAN.KMPX.SV.W.0117.000000T0000Z-250721T2000Z/
Blue Earth MN-Le Sueur MN-
237 PM CDT Mon Jul 21 2025

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR NORTHEASTERN BLUE 
EARTH AND SOUTH CENTRAL LE SUEUR COUNTIES...

The storm which prompted the warning has moved out of the area. 
Therefore, the warning has been cancelled.

&&

LAT...LON 4420 9355 4404 9341 4403 9341 4399 9366
      4415 9377 4420 9377
TIME...MOT...LOC 1927Z 318DEG 29KT 4421 9374

$$


MNC161-212000-
/O.CON.KMPX.SV.W.0117.000000T0000Z-250721T2000Z/
Waseca MN-
237 PM CDT Mon Jul 21 2025

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 3 PM CDT FOR 
NORTHERN WASECA COUNTY...

At 237 PM CDT, a severe thunderstorm was located near Janesville, or 
17 miles east of Mankato, moving southeast at 35 mph.

HAZARD...60 mph wind gusts and small hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
  Waseca, Janesville, Elysian and Waseca Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4420 9355 4404 9341 4403 9341 4399 9366
      4415 9377 4420 9377
TIME...MOT...LOC 1927Z 315DEG 31KT 4418 9372

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Strus

481 
WWUS53 KMPX 211941
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
241 PM CDT Mon Jul 21 2025

MNC161-211951-
/O.CAN.KMPX.SV.W.0117.000000T0000Z-250721T2000Z/
Waseca MN-
241 PM CDT Mon Jul 21 2025

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR NORTHERN WASECA 
COUNTY...

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, gusty winds are 
still possible with this thunderstorm.

&&

LAT...LON 4420 9355 4404 9341 4403 9341 4399 9366
      4415 9377 4420 9377
TIME...MOT...LOC 1937Z 315DEG 31KT 4412 9363

$$

Strus

Area Forecast Discussion
National Weather Service Twin Cities/Chanhassen MN
1251 PM CDT Mon Jul 21 2025

.KEY MESSAGES...

- Cluster of thunderstorms over the Dakotas approaching MN this
  morning may contain strong wind gusts before dissipating by
  this afternoon.

- An active weather pattern will commence Tuesday and last
  through Thursday with multiple chances for
  showers/thunderstorms, including the potential for
  strong/severe storms during day and night periods.

- Excessive heat likely Tuesday and Wednesday, including heat
  index values rising to the upper 90s to low 100s.

&&

.DISCUSSION...
Issued at 447 AM CDT Mon Jul 21 2025

A potent cluster of thunderstorms approaching from the west
this morning continues to ride eastward, with an expected
southerly component turn, along an instability gradient. It
continues to be fed by SE surface winds as the WFO MPX coverage
area remains to the north of a stalled frontal boundary
extending across the CONUS from the northern Rockies through the
central Plains to the Ohio River valley. A potent shortwave
over the Dakotas is also helping nudge this cluster eastward but
it is expected to move into an areas of increased stability,
thus allowing it to dissipate before making much progress into
central-southern MN. That said, there are still several CAM
solutions that bring the complex into eastern MN, namely the TC
metro, indicating that this complex will take advantage of the
remaining nocturnal LLJ to maintain its severe potential
eastward so this will bear watching through late morning. There
have been a few severe-worthy wind reports out of this complex
while in SD.

Once past this morning MCS, focus turns to increasing moisture
as higher dewpoint air is brought in from the south, in
response to a building ridge from the Deep South nudging its way
northward. The surface front will still remain to the south,
helping keep the heat surge from making it this far north, at
least for today. Highs today will generally run from the mid 70s
to near 80, but a pocket of lower 80s is possible in far
western MN. Tonight into Tuesday, the aforementioned front to
the south will make its way northward, starting a period of not
only active weather with multiple periods of rain/thunderstorms
but also a return of excessive heat to the region.

Lows early Tuesday morning will range through the 60s north of
I-94 and into the lower 70s south of I-94. This will be
followed by highs on Tuesday from the mid 80s to lower 90s.
However, the moisture advection will continues, bringing
dewpoints into the low-mid 70s. Thus, heat index values on
Tuesday will range 90-100 degrees, highest along and south of
the Minnesota River. While the heat dome builds just to the east
of our coverage area, allowing for southwest flow with multiple
disturbances riding along it, a cold front dropping in from
south-central Canada will add another potent lifting mechanism
to a mix already containing highly unstable and moist air. Thus,
starting midday Tuesday, periods of rain with embedded
thunderstorms capable of strong/severe hail and/or winds will be
the rule across the area. Trying to pin where/when would have
the best potential of severe storms late Tuesday through late
Wednesday will be highly dependent on where minor shortwave
troughs/disturbances riding around the periphery of the upper
ridge and also dropping SE from Canada with the front, so
details still need to be resolved regarding severe potential.
That said, high confidence is there in having some storms
producing moderate to heavy rain at times. Not expecting any
flooding issues due to the high capacity of the ground to accept
plentiful rains, but cannot rules out rises on area rivers.

A small proverbial break in the action looks to come late
Wednesday morning followed by another round of fairly
widespread rain/thunderstorms Wednesday afternoon through
Wednesday night. Another day of bulk shear in the 35-40kt range,
MUCAPE over 4000 j/kg and next to no capping will promote
strong-severe thunderstorm development but the question of
where/when still exists, plus how much of the area will maintain
its instability versus being worked over from time to time. In
another repeat, excessive heat and humidity will be present but
shifting more into southern MN and western WI, with heat index
values again in the upper 90s to low 100s.

The aforementioned Canadian cold front will push through the WFO
MPX coverage area by late Thursday morning, bringing with it
some of the excessive heat and also the strong/severe potential
to the east. Some scattered showers/thunderstorms are still
possible on Thursday but post-frontal activity will be decidedly
weaker. Also, highs will drop back to the low-mid 80s both
Thursday and Friday.

Precipitation chances continue to decrease going into the
weekend but another surge of heat/humidity is looking more
viable for that period. Highs return to the mid-upper 80s with
another surge in moisture, bringing heat index values well into
the 90s. Will need to see how the forecast details play out over
the next bunch of days before going down the road of viewing
the upcoming weekend under the lens of excessive heat.

&&

.AVIATION /18Z TAFS THROUGH 18Z TUESDAY/...
Issued at 1239 PM CDT Mon Jul 21 2025

A wide mix of conditions across the region this afternoon with
some clear skies mixed with low clouds and showers/thunderstorms
coming off of outflow boundaries from this morning. One better
defined outflow boundary should continue to produce some showers
and storms into this afternoon for STC, RNH, and EAU. Things
should clear out overnight before another chance of rain and
thunderstorms arrives through the day tomorrow, with the best
chance for most terminals in the afternoon. STC may see some
morning showers and thunderstorms.

KMSP...Some thunderstorms are inbound for MSP early this
afternoon, which could lead to a quick brief reduction in
visibility with gusty winds and lightning. Things should clear
out after that passes, though a little pop up shower or
thunderstorm can't be ruled out late this afternoon into the
early evening. Tomorrow, there could be some morning showers,
but current forecasts suggest most of the precipitation should
stay to the north. A better chance for some storms in the
afternoon.

/OUTLOOK FOR KMSP/
WED...Mainly VFR. Chc P.M. MVFR/SHRA/TSRA. Wind SW 8-12 kts.
THU...Mainly VFR. Chc MVFR/SHRA/TSRA. Wind SW 5-10 kts.
FRI...VFR, Wind N 5-10 kts.

&&

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

&&

DISCUSSION...
AVIATION...WFO MPX

Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
341 AM CDT Mon Jul 21 2025

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
220830-
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-
341 AM CDT Mon Jul 21 2025

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

.DAY ONE...Today and Tonight.

A cluster of thunderstorms approaching from the Dakotas this
morning may be strong to severe, capable of producing damaging
wind gusts.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Excessive heat is possible Tuesday and Wednesday, including heat
index values as high as the upper 90s to low 100s.

Several rounds of thunderstorms are expected Tuesday through
Thursday. Some of these thunderstorms may be strong to severe late
Tuesday through late Wednesday, possibly producing large hail or
damaging winds.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation may be needed this morning and possibly
later this week.

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
937 AM CDT Mon Jul 21 2025

MNZ076-077-211500-
Rice MN-Le Sueur MN-
937 AM CDT Mon Jul 21 2025

...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN RICE AND
SOUTHEASTERN LE SUEUR COUNTIES UNTIL 10 AM CDT...

At 937 AM CDT, Doppler radar was tracking a strong thunderstorm near
Le Center, or 19 miles west of Faribault, moving east at 35 mph.

HAZARD...Wind gusts up to 30 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is possible.

Locations impacted include...
  Montgomery, Le Center, Waterville, Morristown, Kilkenny and
  Sakatah Lake State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 4429 9379 4446 9369 4441 9334 4420 9342
TIME...MOT...LOC 1436Z 285DEG 30KT 4436 9366

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

BPH

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1214 PM CDT Mon Jul 21 2025

MNZ066>068-211800-
Sibley MN-Carver MN-McLeod MN-
1214 PM CDT Mon Jul 21 2025

...A STRONG THUNDERSTORM WILL IMPACT MCLEOD...WEST CENTRAL CARVER
AND NORTH CENTRAL SIBLEY COUNTIES UNTIL 1 PM CDT...

At 1214 PM CDT, Doppler radar was tracking a strong thunderstorm
near Hutchinson, moving east at 30 mph.

HAZARD...Wind gusts up to 40 mph and half inch size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is possible.

Locations impacted include...
  Hutchinson, Glencoe, Lester Prairie, Silver Lake, Green Isle,
  Sumter, New Germany, Plato, Biscay, Lake Marion Regional Park,
  Glencoe Airport and Hutchinson Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

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 4493 9450 4494 9450 4489 9397 4467 9401
      4477 9450
TIME...MOT...LOC 1714Z 279DEG 24KT 4485 9445

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

Strus

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1241 PM CDT Mon Jul 21 2025

MNZ066-067-211800-
Sibley MN-McLeod MN-
1241 PM CDT Mon Jul 21 2025

...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN MCLEOD AND NORTH
CENTRAL SIBLEY COUNTIES UNTIL 1 PM CDT...

At 1241 PM CDT, Doppler radar was tracking a strong thunderstorm
near Brownton, or 14 miles south of Hutchinson, moving south at 25
mph.

HAZARD...Wind gusts up to 40 mph and half inch size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is possible.

Locations impacted include...
  Brownton, Green Isle and New Auburn.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

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 4476 9440 4468 9398 4454 9429
TIME...MOT...LOC 1741Z 341DEG 22KT 4469 9431

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

Strus

Preliminary Local Storm Report
National Weather Service Twin Cities/Chanhassen MN
134 PM CDT Mon Jul 21 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0120 PM     Tstm Wnd Dmg     4 W Arlington           44.61N 94.17W
07/21/2025                   Sibley             MN   Public

            Many 3 to 4 inch branches down, and one tree
            down.

&&

jrb

Preliminary Local Storm Report
National Weather Service Twin Cities/Chanhassen MN
209 PM CDT Mon Jul 21 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0158 PM     Hail             1 NNE St. Peter         44.35N 93.95W
07/21/2025  M1.00 Inch       Nicollet           MN   Trained Spotter

            Quarter sized hail near the Kwik Trip in St
            Peter.

&&

BED

Preliminary Local Storm Report
National Weather Service Twin Cities/Chanhassen MN
224 PM CDT Mon Jul 21 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0215 PM     Hail             3 N Madison Lake        44.24N 93.81W
07/21/2025  M1.00 Inch       Le Sueur           MN   Trained Spotter

&&

jrb