Flash Flood Warning 10, NWS La Crosse, WI

660 
WGUS73 KARX 102354
FFSARX

Flash Flood Statement
National Weather Service La Crosse WI
654 PM CDT Sun Aug 10 2025

IAC043-110115-
/O.CON.KARX.FF.W.0010.000000T0000Z-250811T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clayton IA-
654 PM CDT Sun Aug 10 2025

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM CDT THIS 
EVENING FOR CLAYTON COUNTY...

At 654 PM CDT, Doppler radar indicated that the thunderstorms which 
were producing the heavy rain across the warned area have moved east 
into Grant County. Between 2 and 6 inches of rain have fallen today. 
This rain did wash out a road north of Guttenberg. Flash flooding is 
ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Guttenberg, Elkader, Strawberry Point, Garnavillo, Volga, North 
  Buena Vista, St. Olaf, Garber, Osterdock, Clayton, Elkport, 
  Millville, Motor, Communia, Littleport, Clayton Center, 
  Mederville, Osborne, Wood and Updegraff.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4288 9110 4283 9109 4283 9108 4275 9106
      4268 9095 4267 9090 4265 9090 4264 9161
      4290 9161 4299 9116 4291 9115

FLASH FLOOD...RADAR INDICATED

$$

JSB

677 
WGUS73 KARX 110113
FFSARX

Flash Flood Statement
National Weather Service La Crosse WI
813 PM CDT Sun Aug 10 2025

IAC043-110123-
/O.EXP.KARX.FF.W.0010.000000T0000Z-250811T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clayton IA-
813 PM CDT Sun Aug 10 2025

...FLASH FLOOD WARNING WILL EXPIRE AT 815 PM CDT THIS EVENING FOR 
CLAYTON COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

&&

LAT...LON 4268 9095 4267 9090 4265 9090 4264 9161
      4290 9161 4299 9116 4291 9115 4288 9110
      4275 9106

$$

JSB

Area Forecast Discussion
National Weather Service La Crosse WI
434 PM CDT Sun Aug 10 2025

.KEY MESSAGES...

- Showers and storms continue this afternoon, moving eastward
  this evening. Fog is possible overnight into Monday morning.

- Showers/Storms are possible Monday (10-20%) and again Tuesday
  (15-30%)

- Lower rain probabilities and more seasonal temperatures by
  mid-week. Temperatures begin to warm up by the end of the
  week.

&&

.DISCUSSION...
Issued at 259 PM CDT Sun Aug 10 2025

This Afternoon and Tonight

An MCV has been spinning northeastward across Iowa through much
of the day, which has made its way into the Upper Mississippi
River Valley. Forcing associated with this feature has sparked
some additional showers across the region this afternoon. The
environment has largely struggled to recover from this mornings
convection, with the highest instability (500-1500 J/kg)
residing over far southwestern Wisconsin westward into northeast
Iowa. As such, not expecting much of a lightning threat with
the bulk of the showers although can't rule out a few rumbles of
thunder. Areas across northeast Iowa and southwest Wisconsin
are most poised to see storms develop this afternoon with
additional brief heavy rainfall on an already saturated area
(40-70%). As such, some flooding concern continues for areas in
northeast Iowa and southwest Wisconsin. Showers/storms are
expected to move eastward this evening.

As we head into the overnight hours, mid to upper level drying
should occur from the northwest allowing for a decrease in cloud
cover. Given the additional rainfall from today combined with
clearing skies, fog development appears favorable for much of
the area into Monday morning.

Showers and Storms Monday and Tuesday

Monday is expected to be a relatively mundane weather day apart
from the morning's fog. Weak surface high pressure slides
southeastward, keeping the majority of our area dry through the
day. Across the Kansas/Missouri region, an MCV develops and
moves northward through the day, bringing low probabilities of
showers/storms to southwest Wisconsin and northeast Iowa
(10-20%). Confidence is not high regarding Monday's
precipitation probabilities as the high pressure could result
in the showers/storms staying southeast. However, several
shortwave impulses also move through the region so the
additional forcing could aid in convective development. CAMs
have struggled to agree on a solution regarding the evolution of
possible convection on Monday, so have gone with the lower end
probabilities for the time being.

Predictability increases for Tuesday as global deterministic
models are in better agreement regarding an upper level trough
pivoting eastward across the Northern Plains and Great Lakes
with a surface boundary being dragged southeastward through the
region. These features appear to move through the bulk of our
area during the morning areas, limiting precipitation potential
to areas north of I- 90 until the afternoon where stronger
instability and increasing moisture could allow for development
towards central Wisconsin.

Drier and More Seasonable by Mid-Week

A zonal to slight ridging pattern develops in the wake of the
upper trough by mid week, bringing a pattern more favorable for
drier weather. Temperatures will be more seasonable Wednesday
behind the surface boundary, in the upper 70s to low 80s.
Temperatures look to increase to the mid to upper 80s by the end
of the week.

&&

.AVIATION /18Z TAFS THROUGH 18Z MONDAY/...
Issued at 110 PM CDT Sun Aug 10 2025

Showers/storms from this morning have dissipated across the
region this afternoon. Additional showers have developed across
south-central Minnesota and north-central Iowa and are expected
to propagate eastward through the afternoon, although not
overly confident in the eventual evolution of them through our
region. Greater confidence in additional showers/storms
developing in eastern Iowa and moving into far southwestern
Wisconsin from 21z-00z.

Mist/Fog is expected to develop again tonight into Monday
morning given the ample moisture from the rainfall of the past
few days. MVFR/IFR visibilities are possible across the region
through the morning hours with the fog.

&&

.HYDROLOGY...
Issued at 433 PM CDT Sun Aug 10 2025

Additional showers/storms are possible (40-70%) over northeast
Iowa into southwest Wisconsin this afternoon. Rain amounts are
not expected to be as high as they were this morning (1-2"),
but the additional rain on already saturated soils results in
flooding concerns.

Rivers in the area did respond with the abundant rainfall this
morning with several reaching Action Stage. Most rivers are
expected to crest soon if they haven't already, but additional
rainfall this afternoon could see river rises again.

&&

.ARX WATCHES/WARNINGS/ADVISORIES...
WI...Flood Watch until 7 PM CDT this evening for WIZ054-055-061.
MN...None.
IA...Flood Watch until 7 PM CDT this evening for IAZ029-030.

&&

DISCUSSION...Falkinham
AVIATION...Falkinham
HYDROLOGY...Falkinham

Hazardous Weather Outlook
National Weather Service La Crosse WI
405 AM CDT Sun Aug 10 2025

IAZ008>011-018-019-MNZ079-086>088-094>096-WIZ017-029-032>034-
041>044-053-111200-
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Wabasha-
Dodge-Olmsted-Winona-Mower-Fillmore-Houston-Taylor-Clark-Buffalo-
Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams-Vernon-
405 AM CDT Sun Aug 10 2025

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

.DAY ONE...Today and Tonight

Scattered storms will be possible today. The main threat will be
lightning.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

No action needed.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

IAZ029-030-WIZ054-055-061-111200-
Fayette-Clayton-Crawford-Richland-Grant-
405 AM CDT Sun Aug 10 2025

This Hazardous Weather Outlook is for portions of northeast Iowa
and southwest Wisconsin.

.DAY ONE...Today and Tonight

Flood Watch through today. Storms producing heavy rainfall
expected across southwest WI and portions of northeast IA today.
If storms repeat over the same locations, rainfall totals of 2 to
4 inches may occur (15-25% chance), with locally higher amounts,
which could lead to flash flooding.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

No action needed.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

Baumgardt

Preliminary Local Storm Report
National Weather Service La Crosse WI
144 PM CDT Sun Aug 10 2025

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

0712 AM     Flash Flood      Bagley                  42.90N 91.10W
08/10/2025                   Grant              WI   Emergency Mngr

            Debris blocking a railroad bridge resulted
            in storm water to overflow into portions of
            Bagley and inundate some residences.

&&