Frost Advisory 2, NWS La Crosse, WI

137 
WWUS73 KARX 010241
NPWARX

URGENT - WEATHER MESSAGE
National Weather Service La Crosse WI
941 PM CDT Thu Apr 30 2026

WIZ017-029-033-034-042>044-053-055-011300-
/O.CON.KARX.FZ.W.0002.260501T0500Z-260501T1300Z/
Taylor-Clark-Trempealeau-Jackson-Monroe-Juneau-Adams-Vernon-
Richland-
Including the cities of Mauston, Medford, Arcadia, Black River
Falls, Friendship, Sparta, Neillsville, Tomah, Viroqua, Richland
Center, and Whitehall
941 PM CDT Thu Apr 30 2026

...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM CDT FRIDAY...

* WHAT...Sub-freezing temperatures of 26 to 32 degrees expected.

* WHERE...Adams, Clark, Juneau, Taylor, Richland, Vernon, Jackson, 
  Monroe, and Trempealeau Counties.

* WHEN...Until 8 AM CDT Friday.

* IMPACTS...Frost and freeze conditions could kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

IAZ011-MNZ079-088-096-WIZ032-041-054-061-011300-
/O.CON.KARX.FR.Y.0002.260501T0500Z-260501T1300Z/
Allamakee-Wabasha-Winona-Houston-Buffalo-La Crosse-Crawford-Grant-
Including the cities of Wabasha, Caledonia, La Crosse, Alma,
Platteville, Prairie Du Chien, Winona, and Waukon
941 PM CDT Thu Apr 30 2026

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT FRIDAY...

* WHAT...Near freezing temperatures could result in frost formation.

* WHERE...In Iowa, Allamakee County. In Minnesota, Houston, Wabasha, 
  and Winona Counties. In Wisconsin, Crawford, Grant, Buffalo, and 
  La Crosse Counties.

* WHEN...Until 8 AM CDT Friday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Falkinham

955 
WWUS73 KARX 010725
NPWARX

URGENT - WEATHER MESSAGE
National Weather Service La Crosse WI
225 AM CDT Fri May 1 2026

WIZ017-029-033-034-042>044-053-055-011300-
/O.NEW.KARX.FZ.W.0003.260502T0500Z-260502T1300Z/
/O.CON.KARX.FZ.W.0002.000000T0000Z-260501T1300Z/
Taylor-Clark-Trempealeau-Jackson-Monroe-Juneau-Adams-Vernon-
Richland-
Including the cities of Whitehall, Black River Falls, Friendship,
Viroqua, Neillsville, Mauston, Sparta, Medford, Tomah, Richland
Center, and Arcadia
225 AM CDT Fri May 1 2026

...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING...
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM CDT 
SATURDAY...

* WHAT...For this morning's Freeze Warning, sub-freezing 
  temperatures as low as 25. For Saturday morning's Freeze Warning, 
  sub-freezing temperatures as low as 23 expected.

* WHERE...Adams, Clark, Juneau, Taylor, Richland, Vernon, Jackson, 
  Monroe, and Trempealeau Counties.

* WHEN...For the first Freeze Warning, until 8 AM CDT this morning. 
  For the second Freeze Warning, from midnight tonight to 8 AM CDT 
  Saturday.

* IMPACTS...Frost and freeze conditions could kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

WIZ032-041-054-061-011300-
/O.NEW.KARX.FZ.W.0003.260502T0500Z-260502T1300Z/
/O.CON.KARX.FR.Y.0002.000000T0000Z-260501T1300Z/
Buffalo-La Crosse-Crawford-Grant-
Including the cities of La Crosse, Prairie Du Chien, Platteville,
and Alma
225 AM CDT Fri May 1 2026

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING...
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM CDT 
SATURDAY...

* WHAT...For this morning's Frost Advisory, temperatures as low as 
  33 will result in frost formation. For the Freeze Warning, 
  sub-freezing temperatures as low as 29 expected.

* WHERE...Crawford, Grant, Buffalo, and La Crosse Counties.

* WHEN...For the Frost Advisory, until 8 AM CDT this morning. For 
  the Freeze Warning, from midnight tonight to 8 AM CDT Saturday.

* IMPACTS...Frost and freeze conditions could kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing. Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

IAZ011-MNZ079-088-096-011300-
/O.NEW.KARX.FR.Y.0003.260502T0500Z-260502T1300Z/
/O.CON.KARX.FR.Y.0002.000000T0000Z-260501T1300Z/
Allamakee-Wabasha-Winona-Houston-
Including the cities of Caledonia, Waukon, Wabasha, and Winona
225 AM CDT Fri May 1 2026

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING...
...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM CDT 
SATURDAY...

* WHAT...For this morning's Frost Advisory, temperatures as low as 
  33 will result in frost formation. For Saturday morning's Frost 
  Advisory, temperatures as low as 33 will result in frost formation.

* WHERE...In Iowa, Allamakee County. In Minnesota, Houston, Wabasha, 
  and Winona Counties.

* WHEN...For the first Frost Advisory, until 8 AM CDT this morning. 
  For the second Frost Advisory, from midnight tonight to 8 AM CDT 
  Saturday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

IAZ008>010-018-019-029-030-MNZ086-087-094-095-011300-
/O.NEW.KARX.FR.Y.0003.260502T0500Z-260502T1300Z/
Mitchell-Howard-Winneshiek-Floyd-Chickasaw-Fayette-Clayton-Dodge-
Olmsted-Mower-Fillmore-
Including the cities of Rochester, Dodge Center, Oelwein, Cresco,
Charles City, Osage, New Hampton, Decorah, Preston, Austin, and
Elkader
225 AM CDT Fri May 1 2026

...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM CDT 
SATURDAY...

* WHAT...Temperatures as low as 33 will result in frost formation.

* WHERE...Portions of north central and northeast Iowa and southeast 
  Minnesota.

* WHEN...From midnight tonight to 8 AM CDT Saturday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Ferguson

028 
WWUS73 KARX 011301
NPWARX

URGENT - WEATHER MESSAGE
National Weather Service La Crosse WI
801 AM CDT Fri May 1 2026

WIZ017-029-033-034-042>044-053-055-012115-
/O.EXP.KARX.FZ.W.0002.000000T0000Z-260501T1300Z/
/O.CON.KARX.FZ.W.0003.260502T0500Z-260502T1300Z/
Taylor-Clark-Trempealeau-Jackson-Monroe-Juneau-Adams-Vernon-
Richland-
Including the cities of Viroqua, Friendship, Richland Center,
Whitehall, Arcadia, Mauston, Tomah, Medford, Neillsville, Sparta,
and Black River Falls
801 AM CDT Fri May 1 2026

...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM 
CDT SATURDAY...

* WHAT...Sub-freezing temperatures as low as 23 to 30 degrees 
  expected.

* WHERE...Adams, Clark, Juneau, Taylor, Richland, Vernon, Jackson, 
  Monroe, and Trempealeau Counties.

* WHEN...From midnight tonight to 8 AM CDT Saturday.

* IMPACTS...Frost and freeze conditions could kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

WIZ032-041-054-061-012115-
/O.EXP.KARX.FR.Y.0002.000000T0000Z-260501T1300Z/
/O.CON.KARX.FZ.W.0003.260502T0500Z-260502T1300Z/
Buffalo-La Crosse-Crawford-Grant-
Including the cities of Platteville, Alma, Prairie Du Chien, and
La Crosse
801 AM CDT Fri May 1 2026

...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM 
CDT SATURDAY...

* WHAT...Sub-freezing temperatures as low as 23 to 30 degrees 
  expected.

* WHERE...Crawford, Grant, Buffalo, and La Crosse Counties.

* WHEN...From midnight tonight to 8 AM CDT Saturday.

* IMPACTS...Frost and freeze conditions could kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

IAZ011-MNZ079-088-096-012115-
/O.EXP.KARX.FR.Y.0002.000000T0000Z-260501T1300Z/
/O.CON.KARX.FR.Y.0003.260502T0500Z-260502T1300Z/
Allamakee-Wabasha-Winona-Houston-
Including the cities of Waukon, Winona, Caledonia, and Wabasha
801 AM CDT Fri May 1 2026

...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM 
CDT SATURDAY...

* WHAT...Temperatures as low as 32 degrees will result in frost 
  formation.

* WHERE...In Iowa, Allamakee County. In Minnesota, Houston, Wabasha, 
  and Winona Counties.

* WHEN...From midnight tonight to 8 AM CDT Saturday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

IAZ008>010-018-019-029-030-MNZ086-087-094-095-012115-
/O.CON.KARX.FR.Y.0003.260502T0500Z-260502T1300Z/
Mitchell-Howard-Winneshiek-Floyd-Chickasaw-Fayette-Clayton-Dodge-
Olmsted-Mower-Fillmore-
Including the cities of Oelwein, Rochester, Cresco, New Hampton,
Charles City, Preston, Elkader, Dodge Center, Decorah, Osage, and
Austin
801 AM CDT Fri May 1 2026

...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM 
CDT SATURDAY...

* WHAT...Temperatures as low as 32 degrees will result in frost 
  formation.

* WHERE...Portions of north central and northeast Iowa and southeast 
  Minnesota.

* WHEN...From midnight tonight to 8 AM CDT Saturday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Skow

Area Forecast Discussion
National Weather Service La Crosse WI
1220 PM CDT Thu Apr 30 2026

.KEY MESSAGES...

- Cool weather continues through Friday with highs in the 50s
  and lows in the 30s, leading to periods of frost/freeze
  concern during the overnights. Temperatures warm towards
  normal this weekend and into next week.

- Isolated to scattered showers are possible this afternoon and
  again Friday afternoon (10-30%), but overall timing and
  location predictability is low.

&&

.DISCUSSION...
Issued at 1150 PM CDT Wed Apr 29 2026

Cool Temperatures then Warming

Cool temperatures linger today and Friday as an upper level low
churns over the Great Lakes region. Confidence remains high in these
temperatures as very little spread in the 25th-75th percentiles,
on the order of 5 degrees or less, is noted within the majority
of the ensemble suite. During the overnight hours, the cold air
stagnates under clear to mostly clear skies with nearly calm
surface winds. This set up favors frost/freeze conditions, which
are expected through Saturday morning with the current
frost/freeze headlines possibly needing to be expanded into
other counties for the coming nights.

As we head into the weekend, temperatures trend warmer as the upper
low shifts eastward, allowing warmer air to advect into the region.
High temperatures on Saturday reach into the 60s, again with
little variability in the 25th-75th percentiles. A bit more
uncertainty in exact temperatures comes into play as we head
into Sunday and early next week. Looking at the 30.00z
AIFS Ens/AIGEFS, the 25th-75th temperature spread begins to
increase beyond Saturday, upwards of 10-15 degrees. The
important thing to note is that while the exact temperature is
uncertain, the overall warming trend is still depicted despite
the variation.

Showers This Afternoon and Friday

With the bowling ball of a low sitting atop the Great Lakes region
through Friday, sending shortwave trough after shortwave trough into
the Upper Mississippi River Valley within the northwest flow and
cold air advection regime, isolated to scattered shower development
appears reasonable to expect both this afternoon and Friday
afternoon. The primary 500hPa shortwave trough this afternoon shifts
southeastward through the morning hours, sparking some weak surface
cyclogenesis over eastern Iowa and northwestern Illinois this
afternoon that eventually lifts slightly northward into
Wisconsin. Forcing associated with these features combined with
0-3km lapse rates steepening to 7-8C/km per the 30.03z RAP
should provide enough upward motion for some isolated showers
during the afternoon, primarily across Wisconsin where the
forcing will be maximized. A similar set-up occurs for Friday,
albeit without the cyclogenesis, as another shortwave pivots
through the Upper Mississippi River Valley with coverage
expected to be a bit more expansive as compared to today. Those
further north, especially north of I-94, may even see some
snowflakes mix in with the rain during the afternoons. RAP/HRRR
soundings show the mixed layer reaching into the DGZ while
surface temperatures remain near freezing with the possibility
to wet-bulb below freezing. The main limiting factor to
precipitation both days is low level saturation. These same
model soundings depict some dry air below 5kft which may prove
challenging for hydrometeors to fall through, dependent on how
strong the forcing associated with the showers ultimately ends
up being.

&&

.AVIATION /18Z TAFS THROUGH 18Z FRIDAY/...
Issued at 1220 PM CDT Thu Apr 30 2026

VFR conditions through the TAF period. Northwest winds
sustained at 10 to 15 mph through the afternoon, with locations
west of the Mississippi River seeing up to 20 mph. Winds
diminish overnight and then increase to 5 to 10 mph by mid
Friday morning. Scattered rain showers are possible (10 to 25%)
for areas north of I-94 and in far southwest Wisconsin this
afternoon. Light rain chances return tonight and continue into
Friday morning for southeast Minnesota and northeast Iowa. As
the afternoon arrives, the entire region could see scattered
rain showers into the evening. CIGS remain between 5kft and
10kft with coverage between SCT and BKN.

&&

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

&&

DISCUSSION...Falkinham
AVIATION...Cecava

Hazardous Weather Outlook
National Weather Service La Crosse WI
756 AM CDT Thu Apr 30 2026

IAZ011-MNZ079-088-096-WIZ017-029-032>034-041>044-053>055-061-
011700-
Allamakee-Wabasha-Winona-Houston-Taylor-Clark-Buffalo-Trempealeau-
Jackson-La Crosse-Monroe-Juneau-Adams-Vernon-Crawford-Richland-
Grant-
756 AM CDT Thu Apr 30 2026

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

.DAY ONE...Today and Tonight

Temperatures tonight will fall to near or below freezing, which
could damage sensitive vegetation.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Overnight low temperatures will fall to near or below freezing
during the morning hours on Saturday, which could damage sensitive
vegetation.

.SPOTTER INFORMATION STATEMENT...

No action needed.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

IAZ008>010-018-019-029-030-MNZ086-087-094-095-011700-
Mitchell-Howard-Winneshiek-Floyd-Chickasaw-Fayette-Clayton-Dodge-
Olmsted-Mower-Fillmore-
756 AM CDT Thu Apr 30 2026

This Hazardous Weather Outlook is for portions of north central
Iowa...northeast Iowa and southeast Minnesota.

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Overnight low temperatures may fall to near or below freezing
during the morning hours on Saturday, which could damage sensitive
vegetation.

.SPOTTER INFORMATION STATEMENT...

No action needed.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

KDS