Severe Thunderstorm Warning 166, NWS La Crosse, WI

863 
WWUS53 KARX 072051
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
351 PM CDT Fri Aug 7 2026

IAC065-072145-
/O.CON.KARX.SV.W.0166.000000T0000Z-260807T2145Z/
Fayette IA-
351 PM CDT Fri Aug 7 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR SOUTHERN FAYETTE COUNTY...

At 350 PM CDT, a severe thunderstorm was located near Sumner, or 13
miles northwest of Oelwein, moving east at 30 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Oelwein, Fayette, Fairbank, Maynard, Arlington, Stanley, Wadena, 
Westgate, Randalia, Volga River State Park, and Albany.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
La Crosse.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4288 9208 4289 9192 4286 9161 4264 9161
      4264 9208
TIME...MOT...LOC 2050Z 290DEG 27KT 4279 9213 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Ferguson

221 
WWUS53 KARX 072123
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
423 PM CDT Fri Aug 7 2026

IAC065-072145-
/O.CON.KARX.SV.W.0166.000000T0000Z-260807T2145Z/
Fayette IA-
423 PM CDT Fri Aug 7 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR SOUTHERN FAYETTE COUNTY...

At 423 PM CDT, a severe thunderstorm was located near Stanley, or
near Oelwein, moving east at 30 mph.

HAZARD...Two inch hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Oelwein, Fairbank, Maynard, Arlington, Stanley, and Westgate.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
La Crosse.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4278 9205 4281 9195 4277 9161 4264 9161
      4264 9208
TIME...MOT...LOC 2123Z 290DEG 27KT 4270 9181 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Ferguson

065 
WWUS53 KARX 072130
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
430 PM CDT Fri Aug 7 2026

IAC065-072145-
/O.CON.KARX.SV.W.0166.000000T0000Z-260807T2145Z/
Fayette IA-
430 PM CDT Fri Aug 7 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR SOUTHERN FAYETTE COUNTY...

At 429 PM CDT, a severe thunderstorm was located near Aurora, or 8
miles east of Oelwein, moving east at 30 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.

Locations impacted include...
Oelwein, Fairbank, Maynard, Arlington, and Stanley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
La Crosse.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4277 9161 4264 9161 4264 9208 4280 9189
TIME...MOT...LOC 2129Z 290DEG 27KT 4268 9175 

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

$$

Ferguson

699 
WWUS53 KARX 072139
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
439 PM CDT Fri Aug 7 2026

IAC065-072148-
/O.EXP.KARX.SV.W.0166.000000T0000Z-260807T2145Z/
Fayette IA-
439 PM CDT Fri Aug 7 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN FAYETTE COUNTY WILL
EXPIRE AT 445 PM CDT...

The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
northeastern Iowa.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
La Crosse.

&&

LAT...LON 4277 9161 4264 9161 4264 9208 4280 9189
TIME...MOT...LOC 2138Z 290DEG 27KT 4266 9167 

$$

Ferguson

Area Forecast Discussion
National Weather Service La Crosse WI
111 PM CDT Fri Aug 7 2026

.KEY MESSAGES...

- Severe storm risk this afternoon remains a lower confidence
  forecast owing to early morning storms. Pockets of damaging
  winds and heavy rain would be the main threats, which look to
  be focusing over south-central MN and north-central IA.

- Additional rounds of storms return to the forecast from early
  Sunday morning through midweek. There may exist a severe
  weather threat with these storms, but confidence in such
  details is low at this time.

- Seasonal temperatures continue for the weekend with a slight
  cooling trend by midweek as the storm risk pushes south.

&&

.DISCUSSION...
Issued at 110 PM CDT Fri Aug 7 2026

This Afternoon: Storm Details

Several rounds of storms have developed since sunrise on the
nose of a 850-700-mb theta-e ridge that is advancing eastward
just ahead of a surface cold front bifurcating Minnesota from
SW to NE. As expected, the complex hodographs and linear
forcing, coupled with a narrow instability axis in which storms
have little residence time, have resulted in transient storm
structures and a rapid upscale growth. The southern side of the
line has become the dominant feature as of 18Z and is making the
southeastward turn as the cold pool becomes established. This
trend will continue over the next few hours, with damaging winds
being the main threat.

Additional storms may form along the nose the the theta-e ridge,
but time is running out for this to occur before the cold front
arrives. The cold front may serve as a source for additional
convective initiation, but there has been ample anvil shading
along the front and any risk for these storms may be displaced
further north towards northern Wisconsin.

Sunday Morning: Next Round of Storms, Heavy Rain Threat?

Cooler and more stable air filters southward tonight in the wake of
the cold front and persists for much of Saturday as the front stalls
and pivots near I-80 in Iowa. Lee cyclogenesis along the Front Range
helps push this (now warm) front northward across the region once
again late Saturday night into Sunday morning. Aided by a 30-40 kt
LLJ, these storms could be more robust in nature and produce heavy
rainfall. While confidence is increasing that there will be some
sort of MCS across the region, the devil is in the details as to
when exactly it will form, which will dictate its track. Aided by
increasing Gulf moisture and PWATs of 1.5 to 2 inches, coupled with
an increasing line parallel storm motion, this complex could put
down efficient rainfall rates in short order and will need to be
monitored for any flooding risk.

Early Next Week: Continued Storm Risk

The lower tropospheric front stalls between central Iowa and
southern Minnesota for later Sunday through Tuesday, presenting
multiple windows of opportunities for convection that could
bring heavy rain. However, details of these storms remain very
nebulous and will be refined over the coming days.

Mid to Late Week: Drier and Cooler

The medium to longer range solutions are in general agreement
that a a polar airmass will build southward through mid to late
week as the surface baroclinic zone sags southward. This should
result in cooler and drier weather, though with the surface
front not far away, it will not take much of a wobble in the
forecast to bring this rain back northward.

&&

.AVIATION /18Z TAFS THROUGH 18Z SATURDAY/...
Issued at 1200 PM CDT Fri Aug 7 2026

Primary concern over the next 24 hours is the likelihood (60%)
for TS to move west to east across the area this afternoon and
evening, affecting both LSE/RST. Have maintained previous TAF
posture of TS mentions with TEMPO groups of IFR visibility but
with timing adjustments. After TS departs to the east,
northwesterly winds should be predominant and should (80%)
serve to keep stratus/fog concerns confined to the Wisconsin
River valley around OVS overnight into Saturday morning.

&&

.ARX WATCHES/WARNINGS/ADVISORIES...
WI...None.
MN...None.
IA...None.

&&

DISCUSSION...Skow
AVIATION...Ferguson

Hazardous Weather Outlook
National Weather Service La Crosse WI
908 AM CDT Fri Aug 7 2026

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-081815-
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-
Clayton-Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston-
Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau-
Adams-Vernon-Crawford-Richland-Grant-
908 AM CDT Fri Aug 7 2026

This Hazardous Weather Outlook is for portions of northeast Iowa.

.DAY ONE...Today and Tonight

Strong storms are possible this afternoon and evening with
damaging winds (15% chance) as the main hazard.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Additional rounds of storms are possible on Sunday and into early
next week, some of which may approach severe levels and produce
heavy rain.

.SPOTTER INFORMATION STATEMENT...

No action needed.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

KDS

Special Weather Statement
National Weather Service La Crosse WI
240 PM CDT Fri Aug 7 2026

IAZ009-018-019-072015-
Floyd IA-Chickasaw IA-Howard IA-
240 PM CDT Fri Aug 7 2026

...STRONG THUNDERSTORMS WILL IMPACT SOUTHERN HOWARD...EASTERN FLOYD
AND CHICKASAW COUNTIES THROUGH 315 PM CDT...

At 239 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Elma to near Charles City to 7 miles
southwest of Greene. Movement was east at 40 mph.

HAZARD...Wind gusts up to 50 mph and nickel size hail.

SOURCE...Radar indicated.

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

Strong thunderstorms will be near...
  Charles City and Elma around 245 PM CDT.
  Nashua and Ionia around 250 PM CDT.
  New Hampton and Jerico around 255 PM CDT.
  Protivin around 300 PM CDT.

Other locations impacted by these storms include Bradford,
Chickasaw, Oakwood, New Hampton Airport, Powersville, Republic,
Colwell County Park, and Alta Vista.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
north central and northeastern Iowa.

&&

LAT...LON 4300 9280 4321 9259 4321 9255 4325 9255
      4335 9245 4329 9208 4323 9208 4299 9233
      4291 9244 4291 9292
TIME...MOT...LOC 1939Z 275DEG 33KT 4329 9242 4300 9273 4284 9294

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

Ferguson

Special Weather Statement
National Weather Service La Crosse WI
317 PM CDT Fri Aug 7 2026

MNZ087-088-094>096-WIZ032>034-041-072045-
Olmsted MN-Fillmore MN-Winona MN-Mower MN-Houston MN-Buffalo WI-
Jackson WI-Trempealeau WI-La Crosse WI-
317 PM CDT Fri Aug 7 2026

...STRONG THUNDERSTORMS WILL IMPACT WINONA...SOUTHEASTERN OLMSTED...
SOUTHEASTERN MOWER...WESTERN HOUSTON...FILLMORE...SOUTHEASTERN
BUFFALO...NORTHWESTERN LA CROSSE...WESTERN JACKSON AND TREMPEALEAU
COUNTIES THROUGH 345 PM CDT...

At 315 PM CDT, Doppler radar was tracking decaying thunderstorms
generating strong wind gusts along a line extending from near Blair
to near St. Charles to 8 miles southwest of Preston. Movement was
east at 45 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Winona, Black River Falls, Arcadia, Whitehall, Preston, Buffalo,
Holmen, Goodview, St. Charles, Chatfield, Spring Valley, Eyota,
Rushford, Lewiston, Trempealeau, Galesville, Blair, Independence,
Spring Grove, and Strum.

This includes the following highways...
 Interstate 94 between mile markers 92 and 121.
 Interstate 90 in Minnesota between mile markers 224 and 271.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
northeastern Iowa.

&&

LAT...LON 4400 9221 4419 9195 4420 9187 4424 9189
      4459 9142 4453 9105 4428 9068 4384 9149
      4350 9165 4351 9264
TIME...MOT...LOC 2015Z 276DEG 37KT 4428 9132 4390 9200 4358 9219

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Ferguson