Severe Thunderstorm Warning 45, NWS La Crosse, WI

932 
WWUS53 KARX 150435
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1135 PM CDT Tue Apr 14 2026

WIC001-150445-
/O.EXP.KARX.SV.W.0045.000000T0000Z-260415T0445Z/
Adams WI-
1135 PM CDT Tue Apr 14 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ADAMS COUNTY WILL
EXPIRE AT 1145 PM CDT...

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

&&

LAT...LON 4364 8972 4371 8960 4364 8960
TIME...MOT...LOC 0435Z 240DEG 48KT 4366 8951 

$$

Skow

Area Forecast Discussion
National Weather Service La Crosse WI
636 PM CDT Tue Apr 14 2026

.KEY MESSAGES...

- Strong to severe storms possible today, primarily for the
  southeastern half of the forecast area with large hail,
  damaging winds, a few tornadoes as the primary threats. Heavy
  rainfall leading to flash flooding remains a secondary threat
  with overall fast storm motions expected.

- Storm chances continue through Tuesday night and Wednesday,
  eventually ceasing temporarily through Thursday. Additional
  strong to severe storm chances return Friday
  afternoon/evening/night.

&&

.DISCUSSION...
Issued at 1254 PM CDT Tue Apr 14 2026

Severe Storms Today

If you didn't get a slice of the action yesterday, have no fear
because we're in for another round of potentially higher end severe
weather again today. The main locations under the gun today will be
Northeastern Iowa into SW/Central Wisconsin. An outflow boundary
from last night/this mornings convection is expected to lift north
as an effective warm front. Current guidance is in good consensus
that this will stall out across NE Iowa into Central Wisconsin by
mid-afternoon. Satellite imagery is already showing this boundary
clearly across Central Iowa where skies have cleared early this
afternoon. Convective inhibition will erode through the coming
hours with daytime heating and ascent ahead of a shortwave
upper trough ejecting into the Upper Midwest will support
initiation by mid-afternoon. The airmass will be plenty
unstable with 2000-3000 J/kg of MLCAPE present on area soundings
once the cap finally erodes. Supercells are expected to go up
quickly with steep mid level lapse rates and abundant effective
bulk shear across the region (30-50+ kts). All hazards will be
in play with these storms but the main threats look to be large
to very large hail and a few tornadoes (potentially strong). The
parameter space is thermodynamically supportive of large hail.
Hodographs show a fairly straight, elongated hodograph with a
little bit of low level curvature. Think the best threat for
tornadoes will be along and near the boundary where low level
helicity can be maximized. The supercells are expected to move
quickly off to the east and grow upscale into a more linear
feature where damaging winds will take over as the primary
threat. Luckily, hydro concerns remain limited as storms are
expected to form in areas that didn't see significant rainfall
from yesterday's batch of storms. These storms should also be
moving at a good clip which will limit the impacts of heavy
rainfall in a given area. The environment is certainly favorable
for some significant storms this afternoon and early evening
with the Day 1 Enhanced Risk in place with significant hail and
tornado probabilities in place across southwestern Wisconsin and
northeastern Iowa.

Severe Storm Potential Wednesday

The severe threat for Wednesday will hinge a lot upon how much
the airmass can recover from this afternoon/evening's storms.
The airmass will remain persistently warm and moist as yet
another surface low will move into Iowa, likely putting
southeastern portions of our area in the warm sector - again.
Ongoing showers and storms may inhibit how much we can
destabilize by the afternoon. If we can destabilize and get
enough diurnal heating, the environment would be supportive of
strong to severe storms with around 1000 J/kg of CAPE. Shear
profiles this far north don't look particularly impressive but
low level helicity near the warm front may be enough to support
a low tornado risk. Again, this will depend heavily on lingering
convection tonight and into tomorrow morning with hopefully
better consensus among models with the 00Z and 06Z suites.

Storms Ramp Back Up Friday

After a brief lull in activity for Thursday, we ramp back up into
severe chances for Friday. A deep trough is expected to take shape
over the Rockies late in the week. As this slides east,
southwesterly flow is expected to increase across the area. At the
surface, a bit of a complicated pattern is set to take shape with
two semi-weak surface lows, one over the Northern Plains and
another over the Central Plains. Out ahead of these lows, a
broad warm sector will develop across much of the Mississippi
River Valley. With increasing ascent from the upper trough and
surface lift from a cold front that moves east, a line of
storms is expected to develop sometime Friday west of our area.
Steep mid level lapse rates and a strengthening low/mid level
jet at 40-60 kts will support initial supercell development
before storms form into a QLCS. Thermodynamic profiles show a
broad area of 2000-3000 J/kg across our area with slightly
curved and elongated hodographs. With all of this coming
together, SPC has put our area in a Day 4 Slight Risk with an
Enhanced Risk just off to our south and west, where shear and
overall forcing looks a bit more robust.

Snow Showers This Weekend?

As the aforementioned surface low(s) move off to the north and east
into Ontario by 12Z Saturday, the long draping cold front will have
finally made its way through the area. With the low strengthening
slightly, the pressure gradient will remain tight enough to allow
strong cold air advection into the area early Saturday. While
high temperatures Friday will be in the 70s areawide, highs by
Saturday will have fallen 20-30 degrees into the low 40s to mid
50s. Model guidance is even indicating some the precipitation on
the back side of the low could be a rain/snow mix or just all
light snow. Which is a wild thing to think about after a week of
70+ degree temperatures but such is life in the midwest during
spring. Any snow should not be impactful with no accumulations
expected given that ground temperatures should support melting
on contact.

&&

.AVIATION /00Z TAFS THROUGH 00Z THURSDAY/...
Issued at 636 PM CDT Tue Apr 14 2026

During the next hour, KLSE has a chance of seeing a few storms.
A few might be strong. Once these move through the remainder of
the night will be dry with VFR conditions. Some areas of dense
fog will develop toward sunrise. This fog will burn off my mid-
morning. This will leave VFR conditions for the remainder of
the day.

&&

.HYDROLOGY...
Issued at 1254 PM CDT Tue Apr 14 2026

Widespread hydrologic concerns are not expected with this
afternoon and evenings activity given the fast expected storm
motion and overall impacted location being south of where the
heaviest rain for yesterday's event has fallen. Given that SW
Wisconsin is under threat, the main basin of concern would be
the Kickapoo as it's notoriously flashy and could see rises into
Action/Minor with this activity.

Flood watches and warnings continue for locations along the
Black and Trempealeau Rivers primarily with other locations
impacted including the Yellow River at Necedah and various spots
along the Wisconsin River. The larger basins seem more at risk
as we move through the rest of the week with continued chances
for rain today, tomorrow, and Friday. None of these events look
to provide particularly heavy rain but the repeated activity
will likely cause river rises along area basins. Flash flooding
is not of great concern either but rain rates with the strongest
thunderstorms may support local ponding.

&&

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

&&

DISCUSSION...Barendse
AVIATION...Boyne
HYDROLOGY...Barendse

Hazardous Weather Outlook
National Weather Service La Crosse WI
129 PM CDT Tue Apr 14 2026

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-152230-
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-
129 PM CDT Tue Apr 14 2026

This Hazardous Weather Outlook is for portions of southeast
Minnesota...northeast Iowa and southwest into central Wisconsin.

.DAY ONE...This Afternoon and Tonight

Severe thunderstorms are likely this afternoon across northeastern
Iowa and southern Wisconsin with a lesser storm risk further to
the northwest. All storms will be capable of large hail of 2
inches or greater in diameter, damaging winds, and a few
tornadoes. Locally heavy rainfall will be more of a secondary
threat as storms will be moving fairly quickly and shouldn't
linger over any one area for too long.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

The threat for severe weather lingers for Wednesday afternoon and
possibly Friday evening. Uncertainty remains with tomorrow's
activity as ongoing showers/storms tomorrow morning may limit how
strong storms across our area can get. Details on severe weather
for Friday will be refined in the coming days.

.SPOTTER INFORMATION STATEMENT...

Spotter reports may be needed this afternoon and again Wednesday
afternoon.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

Preliminary Local Storm Report
National Weather Service La Crosse WI
543 PM CDT Tue Apr 14 2026

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

0540 PM     Hail             1 WNW Harmony           43.56N 92.03W
04/14/2026  M1.50 Inch       Fillmore           MN   Trained Spotter

&&

jar

Preliminary Local Storm Report
National Weather Service La Crosse WI
555 PM CDT Tue Apr 14 2026

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

0555 PM     Hail             6 ENE Wonewoc           43.70N 90.11W
04/14/2026  M1.00 Inch       Juneau             WI   Emergency Mngr

&&

Preliminary Local Storm Report
National Weather Service La Crosse WI
614 PM CDT Tue Apr 14 2026

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

0600 PM     Hail             4 SSW Plainville        43.67N 89.83W
04/14/2026  M3.00 Inch       Juneau             WI   Trained Spotter

&&

jar

Preliminary Local Storm Report
National Weather Service La Crosse WI
633 PM CDT Tue Apr 14 2026

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

0625 PM     Hail             Bratsberg               43.74N 91.77W
04/14/2026  E1.25 Inch       Fillmore           MN   Public

            1 to 1 1/4 inch hail.

&&

KB

Preliminary Local Storm Report
National Weather Service La Crosse WI
701 PM CDT Tue Apr 14 2026

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

0654 PM     Tstm Wnd Gst     3 W Sinsinawa           42.52N 90.61W
04/14/2026  M70 MPH          Grant              WI   Emergency Mngr

&&

Preliminary Local Storm Report
National Weather Service La Crosse WI
748 PM CDT Tue Apr 14 2026

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

0537 PM     Tornado          2 WNW Union Center      43.69N 90.29W
04/14/2026                   Juneau             WI   Emergency Mngr

            Radar confirmed tornado with debris
            signature. House destroyed on Raese Rd
            northwest of Union Center. The tornado was
            reported to continue northeast crossing
            State Highway 80 before dissipating
            northeast of Union Center. Lots of tree and
            power pole damage along its path.

&&