Alert archive / Wisconsin / Winter Storm Watches in 2021

Winter Storm Watch 5, NWS La Crosse, WI

December 8, 20216 counties in Iowa; 12 counties in Wisconsin; 7 counties in Minnesota

NWS La Crosse, WI issued this winter storm watch at Dec 8, 2021, 2:41 AM CST for 6 counties in Iowa; 12 counties in Wisconsin; 7 counties in Minnesota. It took effect at Dec 10, 2021, 12:00 PM CST. It was in force for .

The area

The counties it named.

The facts

Issued
Dec 8, 2021, 2:41 AM CST (08:41 UTC)
In effect from
Dec 10, 2021, 12:00 PM CST
Expired
Dec 9, 2021, 1:50 PM CST
In force
Issued by
NWS La Crosse, WI
All 25 counties

Allamakee County, IA, Chickasaw 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, Wabasha County, MN, Winona County, MN, Adams County, WI, Buffalo County, WI, Clark County, WI, Crawford County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Monroe County, WI, Richland County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 26 km from the middle of the area, began a volume at 08:42 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 8.7 hours before the alert went out and 201 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2021-12-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2021-12-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
593 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
150 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

558 
WWUS43 KARX 080841
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
241 AM CST Wed Dec 8 2021

IAZ008>011-018-019-MNZ079-086>088-094>096-WIZ029-032>034-041>044-
053>055-082100-
/O.NEW.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Wabasha-
Dodge-Olmsted-Winona-Mower-Fillmore-Houston-Clark-Buffalo-
Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams-Vernon-Crawford-
Richland-
Including the cities of Osage, Cresco, Decorah, Waukon, 
Charles City, New Hampton, Wabasha, Dodge Center, Rochester, 
Winona, Austin, Preston, Caledonia, Neillsville, Alma, Arcadia, 
Whitehall, Black River Falls, La Crosse, Sparta, Tomah, Mauston, 
Friendship, Viroqua, Prairie Du Chien, and Richland Center
241 AM CST Wed Dec 8 2021

...WINTER STORM WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH
LATE FRIDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 4 to 8 
  inches possible.

* WHERE...Portions of southwest into central Wisconsin,  
  northeast Iowa and southeast Minnesota.

* WHEN...From Friday afternoon through late Friday night.

* IMPACTS...Travel could be very difficult. The hazardous
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

Rieck
10 follow-up statements
880 
WWUS43 KARX 081936
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
136 PM CST Wed Dec 8 2021

IAZ008>011-018-019-MNZ079-086>088-094>096-WIZ029-032>034-041>044-
053>055-091000-
/O.CON.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Wabasha-
Dodge-Olmsted-Winona-Mower-Fillmore-Houston-Clark-Buffalo-
Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams-Vernon-Crawford-
Richland-
Including the cities of Osage, Cresco, Decorah, Waukon, 
Charles City, New Hampton, Wabasha, Dodge Center, Rochester, 
Winona, Austin, Preston, Caledonia, Neillsville, Alma, Arcadia, 
Whitehall, Black River Falls, La Crosse, Sparta, Tomah, Mauston, 
Friendship, Viroqua, Prairie Du Chien, and Richland Center
136 PM CST Wed Dec 8 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 4 to 8 
  inches possible.

* WHERE...Portions of central, southwest and west central 
  Wisconsin, north central and northeast Iowa and southeast 
  Minnesota.

* WHEN...From Friday afternoon through late Friday night.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the Friday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

KAA
984 
WWUS43 KARX 082036
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
236 PM CST Wed Dec 8 2021

WIZ017-090445-
/O.EXA.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
Taylor-
Including the city of Medford
236 PM CST Wed Dec 8 2021

...WINTER STORM WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH
LATE FRIDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 5 to 9 
  inches possible.

* WHERE...Taylor County.

* WHEN...From Friday afternoon through late Friday night.

* IMPACTS...Travel could be very difficult. The hazardous
  conditions could impact the Friday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

IAZ008>011-018-019-MNZ079-086>088-094>096-WIZ029-032>034-041>044-
053>055-090445-
/O.CON.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Wabasha-
Dodge-Olmsted-Winona-Mower-Fillmore-Houston-Clark-Buffalo-
Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams-Vernon-Crawford-
Richland-
Including the cities of Osage, Cresco, Decorah, Waukon, 
Charles City, New Hampton, Wabasha, Dodge Center, Rochester, 
Winona, Austin, Preston, Caledonia, Neillsville, Alma, Arcadia, 
Whitehall, Black River Falls, La Crosse, Sparta, Tomah, Mauston, 
Friendship, Viroqua, Prairie Du Chien, and Richland Center
236 PM CST Wed Dec 8 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 4 to 9 
  inches possible.

* WHERE...Portions of central, southwest and west central 
  Wisconsin, north central and northeast Iowa and southeast 
  Minnesota.

* WHEN...From Friday afternoon through late Friday night.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the Friday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
db
047 
WWUS43 KARX 082101
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
301 PM CST Wed Dec 8 2021

IAZ008>011-018-019-MNZ079-086>088-094>096-WIZ017-029-032>034-
041>044-053>055-090515-
/O.CON.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Wabasha-
Dodge-Olmsted-Winona-Mower-Fillmore-Houston-Taylor-Clark-Buffalo-
Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams-Vernon-Crawford-
Richland-
Including the cities of Osage, Cresco, Decorah, Waukon, 
Charles City, New Hampton, Wabasha, Dodge Center, Rochester, 
Winona, Austin, Preston, Caledonia, Medford, Neillsville, Alma, 
Arcadia, Whitehall, Black River Falls, La Crosse, Sparta, Tomah, 
Mauston, Friendship, Viroqua, Prairie Du Chien, 
and Richland Center
301 PM CST Wed Dec 8 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 5 to 9 
  inches possible.

* WHERE...Portions of central, southwest and west central 
  Wisconsin, north central and northeast Iowa and southeast 
  Minnesota.

* WHEN...From Friday afternoon through late Friday night.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the Friday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
Baumgardt
569 
WWUS43 KARX 090447
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
1047 PM CST Wed Dec 8 2021

IAZ008>011-018-019-MNZ079-086>088-094>096-WIZ017-029-032>034-
041>044-053>055-091300-
/O.CON.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Wabasha-
Dodge-Olmsted-Winona-Mower-Fillmore-Houston-Taylor-Clark-Buffalo-
Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams-Vernon-Crawford-
Richland-
Including the cities of Osage, Cresco, Decorah, Waukon, 
Charles City, New Hampton, Wabasha, Dodge Center, Rochester, 
Winona, Austin, Preston, Caledonia, Medford, Neillsville, Alma, 
Arcadia, Whitehall, Black River Falls, La Crosse, Sparta, Tomah, 
Mauston, Friendship, Viroqua, Prairie Du Chien, 
and Richland Center
1047 PM CST Wed Dec 8 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 5 to 9
  inches.

* WHERE...All of southeast Minnesota and much of west-central
  Wisconsin and northeastern Iowa.

* WHEN...The storm would move in midday Friday and exit by 
  sunrise on Saturday. The heaviest snow is likely to fall Friday 
  night.

* IMPACTS...Travel could be very difficult. The hazardous
  conditions could impact the Friday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

&&

$$

KDS
733 
WWUS43 KARX 091021
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
421 AM CST Thu Dec 9 2021

IAZ008>011-018-019-MNZ079-086>088-094>096-WIZ017-029-032>034-
041>044-053>055-091830-
/O.CON.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Wabasha-
Dodge-Olmsted-Winona-Mower-Fillmore-Houston-Taylor-Clark-Buffalo-
Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams-Vernon-Crawford-
Richland-
Including the cities of Osage, Cresco, Decorah, Waukon, 
Charles City, New Hampton, Wabasha, Dodge Center, Rochester, 
Winona, Austin, Preston, Caledonia, Medford, Neillsville, Alma, 
Arcadia, Whitehall, Black River Falls, La Crosse, Sparta, Tomah, 
Mauston, Friendship, Viroqua, Prairie Du Chien, 
and Richland Center
421 AM CST Thu Dec 9 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 5 to 
  12 inches possible.

* WHERE...Portions of central, north central, southwest and west 
  central Wisconsin, north central and northeast Iowa and 
  southeast Minnesota.

* WHEN...From Friday afternoon through late Friday night.

* IMPACTS...Travel could be very difficult. Patchy blowing snow 
  could significantly reduce visibility. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

Zapotocny
762 
WWUS43 KARX 091123
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
523 AM CST Thu Dec 9 2021

IAZ008>011-018-019-MNZ086>088-094>096-WIZ053>055-091930-
/O.NEW.KARX.WW.Y.0013.211209T1123Z-211209T1500Z/
/O.CON.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Dodge-
Olmsted-Winona-Mower-Fillmore-Houston-Vernon-Crawford-Richland-
Including the cities of Osage, Cresco, Decorah, Waukon, 
Charles City, New Hampton, Dodge Center, Rochester, Winona, 
Austin, Preston, Caledonia, Viroqua, Prairie Du Chien, 
and Richland Center
523 AM CST Thu Dec 9 2021

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 9 AM CST THIS
MORNING...
...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...

* WHAT...For the Winter Weather Advisory,a mix of freezing rain,
  sleet and snow transitioning to all snow. Snow accumulations a 
  trace to one inch. For the Winter Storm Watch, heavy snow 
  possible. Total snow accumulations of 5 to 12 inches possible.

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

* WHEN...For the Winter Weather Advisory, until 9 AM CST this 
  morning. For the Winter Storm Watch, from Friday afternoon 
  through late Friday night.

* IMPACTS...This morning, roads may become slippery. For Friday
  night, travel could be very difficult. The hazardous conditions
  could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

Monitor the latest forecasts for updates on this situation. 

For the latest road conditions, check 511ia.org in Iowa,
511mn.org in Minnesota, and 511wi.gov in Wisconsin.

&&

$$

IAZ029-030-WIZ061-091500-
/O.NEW.KARX.WW.Y.0013.211209T1123Z-211209T1500Z/
Fayette-Clayton-Grant-
Including the cities of Oelwein, Elkader, and Platteville
523 AM CST Thu Dec 9 2021

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 9 AM CST THIS
MORNING...

* WHAT...A mix of freezing rain, sleet and snow. A light glaze of
  ice. Snow accumulations a trace to one inch.

* WHERE...In Wisconsin, Grant County. In Iowa, Fayette and 
  Clayton Counties.

* WHEN...Until 9 AM CST this morning.

* IMPACTS...This morning, roads may become slippery. For Friday
  night, travel could be very difficult. The hazardous conditions
  could impact the morning or evening commute.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For the latest road conditions, check 511ia.org in Iowa,
511mn.org in Minnesota, and 511wi.gov in Wisconsin.

&&

$$

MNZ079-WIZ017-029-032>034-041>044-091930-
/O.CON.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
Wabasha-Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-
Juneau-Adams-
Including the cities of Wabasha, Medford, Neillsville, Alma, 
Arcadia, Whitehall, Black River Falls, La Crosse, Sparta, Tomah, 
Mauston, and Friendship
523 AM CST Thu Dec 9 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 5 to 
  12 inches possible.

* WHERE...Portions of central, north central and west central 
  Wisconsin and southeast Minnesota.

* WHEN...From Friday afternoon through late Friday night.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

Zapotocny
497 
WWUS43 KARX 091429
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
829 AM CST Thu Dec 9 2021

...Wintry Mix Causing Some Slick Roads This Morning...

.A wintry mix continues to shift through the area and roads are
slick and crashes have been reported by the Department of 
Transportation in Minnesota and Iowa. Freezing rain is now 
changing over to sleet and snow in many areas. The precipitation 
will be finished by 10 am in Minnesota and Iowa.

Mainly sleet and snow will fall through early afternoon in  
Wisconsin, however a brief period of freezing rain could occur and
make roads slick. 

IAZ008>011-018-019-MNZ086>088-094>096-WIZ053>055-092230-
/O.CON.KARX.WW.Y.0013.000000T0000Z-211209T1500Z/
/O.CON.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Dodge-
Olmsted-Winona-Mower-Fillmore-Houston-Vernon-Crawford-Richland-
Including the cities of Osage, Cresco, Decorah, Waukon, 
Charles City, New Hampton, Dodge Center, Rochester, Winona, 
Austin, Preston, Caledonia, Viroqua, Prairie Du Chien, 
and Richland Center
829 AM CST Thu Dec 9 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST THIS
MORNING...
...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...

* WHAT...For the Winter Weather Advisory,a mix of freezing rain, 
  sleet and snow transitioning to all snow. Snow accumulations a 
  trace to one inch. For the Winter Storm Watch, heavy snow 
  possible. Total snow accumulations of 5 to 12 inches possible.

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

* WHEN...For the Winter Weather Advisory, until 9 AM CST this 
  morning. For the Winter Storm Watch, from Friday afternoon 
  through late Friday night.

* IMPACTS...This morning, roads may become slippery. For Friday 
  night, travel could be very difficult. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

Monitor the latest forecasts for updates on this situation. 

For the latest road conditions, check 511ia.org in Iowa,
511mn.org in Minnesota, and 511wi.gov in Wisconsin.

&&

$$

IAZ029-030-WIZ061-091530-
/O.CON.KARX.WW.Y.0013.000000T0000Z-211209T1500Z/
Fayette-Clayton-Grant-
Including the cities of Oelwein, Elkader, and Platteville
829 AM CST Thu Dec 9 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST THIS
MORNING...

* WHAT...A mix of freezing rain, sleet and snow. A light glaze 
  of ice. Snow accumulations a trace to one inch.

* WHERE...In Wisconsin, Grant County. In Iowa, Fayette and 
  Clayton Counties.

* WHEN...Until 9 AM CST this morning.

* IMPACTS...This morning, roads may become slippery. For Friday 
  night, travel could be very difficult. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For the latest road conditions, check 511ia.org in Iowa,
511mn.org in Minnesota, and 511wi.gov in Wisconsin.

&&

$$

MNZ079-WIZ017-029-032>034-041>044-092230-
/O.CON.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
Wabasha-Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-
Juneau-Adams-
Including the cities of Wabasha, Medford, Neillsville, Alma, 
Arcadia, Whitehall, Black River Falls, La Crosse, Sparta, Tomah, 
Mauston, and Friendship
829 AM CST Thu Dec 9 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 5 to 
  12 inches possible.

* WHERE...Portions of central, north central and west central 
  Wisconsin and southeast Minnesota.

* WHEN...From Friday afternoon through late Friday night.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
462 
WWUS43 KARX 091459
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
859 AM CST Thu Dec 9 2021

...The Threat for Additional Freezing Rain Has Passed...

.A wintry mix, including freezing rain and light icing, affected 
the area early this morning. Over the next hours, the 
precipitation will end if it has not already, and thus the threat 
for additional hazardous weather is ending. 

Some roads may still be slick, especially those untreated and less
traveled. 

The snow storm for Friday still looks on track with the heaviest
snows north and west of La Crosse, Wisconsin. 

IAZ008>011-018-019-MNZ086>088-094>096-WIZ053>055-092300-
/O.EXP.KARX.WW.Y.0013.000000T0000Z-211209T1500Z/
/O.CON.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Dodge-
Olmsted-Winona-Mower-Fillmore-Houston-Vernon-Crawford-Richland-
Including the cities of Osage, Cresco, Decorah, Waukon, 
Charles City, New Hampton, Dodge Center, Rochester, Winona, 
Austin, Preston, Caledonia, Viroqua, Prairie Du Chien, 
and Richland Center
859 AM CST Thu Dec 9 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...
...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM CST THIS MORNING...

* WHAT...Heavy snow possible. Total snow accumulations of 5 to 12 
  inches possible.

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

* WHEN...Friday afternoon through late Friday night.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

IAZ029-030-WIZ061-091600-
/O.EXP.KARX.WW.Y.0013.000000T0000Z-211209T1500Z/
Fayette-Clayton-Grant-
Including the cities of Oelwein, Elkader, and Platteville
859 AM CST Thu Dec 9 2021

...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM CST THIS MORNING...

Precipitation will be ending and conditions improving.

$$

MNZ079-WIZ017-029-032>034-041>044-092300-
/O.CON.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
Wabasha-Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-
Juneau-Adams-
Including the cities of Wabasha, Medford, Neillsville, Alma, 
Arcadia, Whitehall, Black River Falls, La Crosse, Sparta, Tomah, 
Mauston, and Friendship
859 AM CST Thu Dec 9 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 5 to 
  12 inches possible.

* WHERE...Portions of central, north central and west central 
  Wisconsin and southeast Minnesota.

* WHEN...From Friday afternoon through late Friday night.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
Baumgardt
929 
WWUS43 KARX 091741
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
1141 AM CST Thu Dec 9 2021

MNZ079-086>088-094-095-WIZ032>034-100145-
/O.UPG.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
/O.NEW.KARX.WS.W.0006.211210T1500Z-211211T1200Z/
Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Buffalo-Trempealeau-
Jackson-
Including the cities of Wabasha, Dodge Center, Rochester, Winona,
Austin, Preston, Alma, Arcadia, Whitehall, and Black River Falls
1141 AM CST Thu Dec 9 2021

...WINTER STORM WARNING IN EFFECT FROM 9 AM FRIDAY TO 6 AM CST
SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 8 to 12 
  inches.

* WHERE...Portions of west central Wisconsin and southeast 
  Minnesota.

* WHEN...From 9 AM Friday to 6 AM CST Saturday. The heaviest snow
  period will be Friday late afternoon and evening. 

* IMPACTS...Travel could be very difficult. Patchy blowing snow
  could significantly reduce visibility. The hazardous conditions
  will impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For the latest road conditions, check 511ia.org in Iowa,
511mn.org in Minnesota, and 511wi.gov in Wisconsin.

&&

$$

WIZ017-029-100145-
/O.UPG.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
/O.NEW.KARX.WS.W.0006.211210T1800Z-211211T1200Z/
Taylor-Clark-
Including the cities of Medford and Neillsville
1141 AM CST Thu Dec 9 2021

...WINTER STORM WARNING IN EFFECT FROM NOON FRIDAY TO 6 AM CST
SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 8 to 12 inches.

* WHERE...Taylor and Clark Counties.

* WHEN...From noon Friday to 6 AM CST Saturday. The heaviest snow
  period will be Friday evening. 

* IMPACTS...Travel could be very difficult. The hazardous
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For the latest road conditions, check 511ia.org in Iowa,
511mn.org in Minnesota, and 511wi.gov in Wisconsin.

&&

$$

IAZ008>011-018-019-MNZ096-WIZ041>044-053>055-100145-
/O.CON.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Houston-
La Crosse-Monroe-Juneau-Adams-Vernon-Crawford-Richland-
Including the cities of Osage, Cresco, Decorah, Waukon, 
Charles City, New Hampton, Caledonia, La Crosse, Sparta, Tomah, 
Mauston, Friendship, Viroqua, Prairie Du Chien, 
and Richland Center
1141 AM CST Thu Dec 9 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of 5 to 9 
  inches possible.

* WHERE...Portions of southwest into central Wisconsin, 
  northeast Iowa and southeast Minnesota.

* WHEN...Friday afternoon through late Friday night.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

Baumgardt
957 
WWUS43 KARX 091950
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
150 PM CST Thu Dec 9 2021

IAZ008-009-MNZ096-WIZ041-042-053-100400-
/O.UPG.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
/O.EXA.KARX.WS.W.0006.211210T1500Z-211211T1200Z/
Mitchell-Howard-Houston-La Crosse-Monroe-Vernon-
Including the cities of Osage, Cresco, Caledonia, La Crosse, 
Sparta, Tomah, and Viroqua
150 PM CST Thu Dec 9 2021

...WINTER STORM WARNING IN EFFECT FROM 9 AM FRIDAY TO 6 AM CST
SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 7
  inches. Winds gusting as high as 35 mph creating some blowing
  and drifting snow.

* WHERE...Portions of southwest and west central Wisconsin, 
  north central and northeast Iowa and southeast Minnesota.

* WHEN...From 9 AM Friday to 6 AM CST Saturday.

* IMPACTS...Travel could be very difficult. Patchy blowing snow 
  could significantly reduce visibility. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For the latest road conditions, check 511ia.org in Iowa,
511mn.org in Minnesota, and 511wi.gov in Wisconsin.

&&

$$

WIZ043-044-100400-
/O.UPG.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
/O.EXA.KARX.WS.W.0006.211210T1800Z-211211T1200Z/
Juneau-Adams-
Including the cities of Mauston and Friendship
150 PM CST Thu Dec 9 2021

...WINTER STORM WARNING IN EFFECT FROM NOON FRIDAY TO 6 AM CST
SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 7
  inches.

* WHERE...Juneau and Adams Counties.

* WHEN...From noon Friday to 6 AM CST Saturday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For the latest road conditions, check 511ia.org in Iowa,
511mn.org in Minnesota, and 511wi.gov in Wisconsin.

&&

$$

MNZ079-086>088-094-095-WIZ032>034-100400-
/O.CON.KARX.WS.W.0006.211210T1500Z-211211T1200Z/
Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Buffalo-Trempealeau-
Jackson-
Including the cities of Wabasha, Dodge Center, Rochester, Winona,
Austin, Preston, Alma, Arcadia, Whitehall, and Black River Falls
150 PM CST Thu Dec 9 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 9 AM FRIDAY TO
6 AM CST SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 7 to 13
  inches. Winds gusting as high as 35 mph creating some blowing
  and drifting snow.

* WHERE...Portions of west central Wisconsin and southeast 
  Minnesota.

* WHEN...From 9 AM Friday to 6 AM CST Saturday.

* IMPACTS...Travel could be very difficult to impossible. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For the latest road conditions, check 511ia.org in Iowa,
511mn.org in Minnesota, and 511wi.gov in Wisconsin.

&&

$$

WIZ017-029-100400-
/O.CON.KARX.WS.W.0006.211210T1800Z-211211T1200Z/
Taylor-Clark-
Including the cities of Medford and Neillsville
150 PM CST Thu Dec 9 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM NOON FRIDAY TO
6 AM CST SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 8 to 11
  inches. Winds gusting as high as 30 mph creating some blowing 
  and drifting snow.

* WHERE...Taylor and Clark Counties.

* WHEN...From noon Friday to 6 AM CST Saturday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For the latest road conditions, check 511ia.org in Iowa,
511mn.org in Minnesota, and 511wi.gov in Wisconsin.

&&

$$

IAZ010-011-018-019-WIZ054-055-100400-
/O.UPG.KARX.WS.A.0005.211210T1800Z-211211T1200Z/
/O.NEW.KARX.WW.Y.0014.211210T1800Z-211211T1200Z/
Winneshiek-Allamakee-Floyd-Chickasaw-Crawford-Richland-
Including the cities of Decorah, Waukon, Charles City, 
New Hampton, Prairie Du Chien, and Richland Center
150 PM CST Thu Dec 9 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM NOON FRIDAY TO 6 AM CST
SATURDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 6 inches.
  Winds gusting as high as 35 mph creating some blowing and
  drifting snow.

* WHERE...Portions of southwest Wisconsin and north central and 
  northeast Iowa.

* WHEN...From noon Friday to 6 AM CST Saturday.

* IMPACTS...Travel could be very difficult. Patchy blowing snow 
  could significantly reduce visibility. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For the latest road conditions, check 511ia.org in Iowa,
511mn.org in Minnesota, and 511wi.gov in Wisconsin.

&&

$$

04

What forecasters said that day

The local office's own words before this winter storm watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS La Crosse, WI wrote its last area forecast discussion before this winter storm watch went out at Dec 7, 10:45 PM CST, 3 hours 56 minutes earlier.

Area forecast discussion, Dec 7, 10:45 PM CST, 3 hours 56 minutes before
Area Forecast Discussion
National Weather Service La Crosse WI
1045 PM CST Tue Dec 7 2021

.UPDATE...
Issued at 423 PM CST Tue Dec 7 2021

Have extended PoPs for another 4-6 hours this evening given the
current location and trajectories of a pair of shortwaves upstream
over western MN. Snow--albeit light--continues to be reported as
far west as Willmar/Glenwood, MN in conjunction with the second
wave up towards the Red River Valley. The heaviest snow should be
in the next 3-4 hours with very high snow ratios resulting in a
quick inch or more of snow in most locales along a broad swath of
the I-94 corridor. Areas around Rochester reported upwards of
2-3+ inches of snow with this system earlier in the day.

&&

.SHORT TERM...(Tonight through Wednesday)
Issued at 222 PM CST Tue Dec 7 2021

Still dealing with impact of passing short wave trough this
afternoon, which might be a bit stronger than previously thought.
Surface low as of 20z is is tracking across far southern Minnesota
with area of snow advancing along with it. Lift through dendritic
zone is maximizing this afternoon just ahead of this feature so
quick 1-2 inches of 25:1 snow being observed. And with a stronger
low, seeing tighter pressure gradient and some drifting given how
fluffy snow is. Still expect this to gradually end from west to east
going into the evening as feature moves out.

A bit of a break on Wednesday with short term ridging. Even with
colder airmass should see more sunshine and light winds for a
seasonal day.

.LONG TERM...(Wednesday Night through Tuesday)
Issued at 222 PM CST Tue Dec 7 2021

By Wednesday night, mid level ridge passage will begin shift of
overall flow. Next short wave trough will exit the Plains and as
this approaches, expect low level warm air advection and lift to
help saturate and break out precipitation by Thursday morning. This
is especially true east of the Mississippi River. Bulk of this
should be snow but some temperature profiles could support brief mix
with hints of some melting. In any event, precipitation looks fairly
light. If short duration mixed or freezing precipitation does
materialize, might see some matching brief impacts to travel.

Dive into late week details continues to support growing confidence
for an impactful winter event. Medium range guidance and ensembles
continue to be in good agreement that parts of our service area are
in play for heavy snow potential along with a mixed precipitation
threat.

This potential storm has many classic characteristics, including
coupled jet structure aiding lift, positive tilt with ample
moisture, strong quasi-geostropic forcing signal, strong lift
through the dendritic growth zone, clear deformation zone with
persistent mid-level frontogenetic band, and likely longer
precipitation time. Ensemble data continues to support possible
deformation zone crossing our west and northern counties but some
differences in clusters between model groups. Did notice some
increase in blend of models /NBM/ and tighter snowfall gradient but
still not locked on to one solution.

Warmer air aloft does advect into southern areas ahead of system
which could create more mixed precipitation south of KLSE, including
more liquid closer to KDBQ. Convective threat could produce more
sleet. In addition, possibility of dry slot and loss of ice exists
so plenty of questions regarding location of these threats.

Possibility of headlines could start up next forecast period.

The other weather aspect that has been well advertised is the warm
up behind the early weekend event. As broad upper ridge quickly sets
in across mid CONUS, warm air advection will return quickly. But
this might all be tempered somewhat with a fresh snowpack so have
moderated amount of warmup for time being.

&&

.AVIATION...(For the 06Z TAFS through 06Z Wednesday night)
Issued at 1029 PM CST Tue Dec 7 2021

Mainly VFR conditions are forecast for the TAF period as light
snow moves out of the area, but some MVFR ceilings/visibilities
are possible over southeast MN and western Wisconsin towards the
09-15Z timeframe (mainly affecting the RST TAF). Confidence in
this possibility was not high enough to mention in the TAFs at
this time. Light and variable winds now shift to the northwest
overnight, then back to the south Wednesday afternoon.

&&

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

UPDATE...Skow
SHORT TERM...Shea
LONG TERM...Shea
AVIATION...Skow
Hazardous weather outlook, Dec 7, 10:50 PM CST, 3 hours 51 minutes before
Hazardous Weather Outlook
National Weather Service La Crosse WI
1050 PM CST Tue Dec 7 2021

MNZ079-WIZ017-029-032>034-090900-
Wabasha-Taylor-Clark-Buffalo-Trempealeau-Jackson-
1050 PM CST Tue Dec 7 2021

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

.DAY ONE...Tonight

Light snow gradually ends this evening from and west to east with
slick roads still possible at times.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Another round of snow is likely Thursday. Accumulations from 1"
north of I-94 to a few tenths south of there are currently
expected.

A winter storm moves in for Friday into Saturday. Confidence is
high the storm will produce a heavy snow band, likely some
blowing and drifting snow, along with the threat for freezing
precipitation. However, with some uncertainty on the storm track,
details on what falls where and how much is unclear. Travel
impacts are expected and should be planned for.

.SPOTTER INFORMATION STATEMENT...

Snowfall reports are appreciated.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

IAZ008>011-018-019-029-030-MNZ086>088-094>096-WIZ041>044-053>055-
061-090900-
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-
Clayton-Dodge-Olmsted-Winona-Mower-Fillmore-Houston-La Crosse-
Monroe-Juneau-Adams-Vernon-Crawford-Richland-Grant-
1050 PM CST Tue Dec 7 2021

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

.DAY ONE...Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Another round of snow is likely Thursday. Accumulations from 1"
north of I-94 to a few tenths south of there are currently
expected.

A winter storm moves in for Friday into Saturday. Confidence is
high the storm will produce a heavy snow band, likely some
blowing and drifting snow, along with the threat for freezing
precipitation. However, with some uncertainty on the storm track,
details on what falls where and how much is unclear. Travel
impacts are expected and should be planned for.

.SPOTTER INFORMATION STATEMENT...

No action needed.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

NOFWD
KDS

In the hours before

Local storm report, Dec 7, 8:49 PM CST, 5 hours 52 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
849 PM CST TUE DEC 7 2021

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

0726 PM     SNOW             5 NE MONTANA            44.40N 91.61W
12/07/2021  E3.0 INCH        BUFFALO            WI   PUBLIC

&&
Local storm report, Dec 7, 8:50 PM CST, 5 hours 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
850 PM CST TUE DEC 7 2021

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

0850 PM     SNOW             KASSON                  44.03N 92.75W
12/07/2021  M3.0 INCH        DODGE              MN   PUBLIC

&&

Nearby

Winter Storm Watches in Wisconsin, 2021Winter Storm Watches in Minnesota, 2021Winter Storm Watches in Iowa, 2021Every winter storm watch in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.