Wind Advisory 5, NWS La Crosse, WI

Allamakee County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Floyd County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Dodge County, MN, Fillmore County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Winona County, MN, Adams County, WI, Crawford County, WI, Grant County, WI, Juneau County, WI, La Crosse County, WI, Monroe County, WI, Richland County, WI, Vernon County, WI

779 
WWUS73 KARX 130058
NPWARX

URGENT - WEATHER MESSAGE
National Weather Service La Crosse WI
758 PM CDT Tue May 12 2026

IAZ008>011-018-019-029-030-MNZ086>088-094>096-WIZ041>044-053>055-061-
130200-
/O.EXP.KARX.WI.Y.0005.000000T0000Z-260513T0100Z/
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-
Clayton-Dodge-Olmsted-Winona-Mower-Fillmore-Houston-La Crosse-
Monroe-Juneau-Adams-Vernon-Crawford-Richland-Grant-
Including the cities of Winona, Mauston, Austin, New Hampton,
Friendship, Charles City, Tomah, Prairie Du Chien, Decorah,
Osage, La Crosse, Richland Center, Sparta, Dodge Center, Elkader,
Rochester, Cresco, Oelwein, Viroqua, Waukon, Platteville,
Caledonia, and Preston
758 PM CDT Tue May 12 2026

...WIND ADVISORY WILL EXPIRE AT 8 PM CDT THIS EVENING...

The stronger winds have begun to subside. Winds will continue to 
diminish during the evening.

$$

Cecava

Area Forecast Discussion
National Weather Service La Crosse WI
225 PM CDT Tue May 12 2026

.KEY MESSAGES...

- A stray shower or storm possible (10-20%) in central
  Wisconsin this afternoon.

- Large scale pattern shift brings periodic potential for
  showers and thunderstorms Thursday onward. Temperatures will
  also tend to shift to the 70s and perhaps 80s, above normal
  for mid-May.

- Monitoring Sunday and Monday for low severe storm potential.

&&

.DISCUSSION...
Issued at 219 PM CDT Tue May 12 2026

Stray shower possible in central Wisconsin

18z satellite shows an area of cumulus developing over
central/northern MN into northwest WI as a stout upper wave dives
southeast over the Great Lakes. While cumulus field is flat at this
time, cannot rule out a stray shower or thunderstorm developing as
the field advances southeast over central WI given the strength of
the upper wave and efficient mixing in the low levels. Aside from
lightning, risk with any of this convection would be strong gusts at
the surface given deep, well-mixed boundary layer.

Pattern shift ahead - periodic rain and warm weather

Persistent northwest flow aloft quits persisting past Thursday as
quasi-zonal flow alot becomes predominant through the weekend before
southwesterly flow takes over early next week. The end result will
be warmer conditions and multiple chances for precip as some return
flow does start to edge into the region, particularly into Sunday
and Monday, as described below. While 12.13z NBM highs
Friday/Saturday are in the lower 80s, inspection of components going
into the NBM shows a disconnect between warmer bias corrected
members and raw members, which are in the 70s. Therefore, while
Friday and Saturday should be warmer than normal, do not be
surprised if things remain below 80.

Aside from the severe storm potential discussed later, only period
of potential intrigue looks to be Friday when a strong northern
stream wave moves over southern Manitoba with a stacked
500/700/850mb jet on the equatorward side of this feature. This
setup looks to bring relatively warm, dry, and windy conditions to
portions of the upper midwest, leading to fire weather conditions.
For our forecast area, operational guidance, probabilities within
each of the 12.00z GEFS/ECENS/CMCE, and probabilities after cluster
analysis of 12.00z LREF members suggest the overlap of strong winds
and dry conditions should remain to our west.

Low potential for severe thunderstorms Sunday and Monday

Southerly flow in the low levels starting Saturday should bring
enough moisture to the region for thunderstorms as a shortwave
ejects northeast Sunday and the main body of an upper trough
approaches Monday. Given increasing southwesterly flow aloft atop
southerlies at the surface, this could lead to severe thunderstorms
depending on the timing of the aforementioned upper trough and lead
shortwave and, for Monday, if ongoing convection prevents
destabilization from occurring. 5 to 6 days to go so cannot make any
big pronouncements other than both 12.00z ML guidance and LREF
probabilities suggest continued monitoring is prudent.

&&

.AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/...
Issued at 1223 PM CDT Tue May 12 2026

VFR conditions should prevail over the next 24 hours however
there is potential for a few clouds around 3-4 kft to be present
north/east of a RGK-OVS line between 06z and 18z Wednesday.
Northwesterly gusts to 35 knots are expected this afternoon
west of the Mississippi valley while areas to the east will see
these gusts up to 25-30 knots as winds turn from southwesterly
to northwesterly.

&&

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

&&

DISCUSSION...Ferguson
AVIATION...Ferguson

Hazardous Weather Outlook
National Weather Service La Crosse WI
232 PM CDT Tue May 12 2026

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-132345-
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-
232 PM CDT Tue May 12 2026

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

.DAY ONE...This Afternoon and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Strong to severe storms may occur south of Interstate 90 on
Sunday.

.SPOTTER INFORMATION STATEMENT...

No action needed.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

APF