Alert archive / Iowa / Winter Storm Watches in 2021

Winter Storm Watch 4, NWS La Crosse, WI

March 13, 2021Mower County, Minnesota; 5 counties in Iowa

NWS La Crosse, WI issued this winter storm watch at Mar 13, 2021, 3:20 AM CST for Mower County, Minnesota; 5 counties in Iowa. It took effect at Mar 15, 2021, 1:00 AM CDT. It was in force for .

The area

The counties it named.

The facts

Issued
Mar 13, 2021, 3:20 AM CST (09:20 UTC)
In effect from
Mar 15, 2021, 1:00 AM CDT
Expired
Mar 14, 2021, 4:06 AM CDT
In force
Issued by
NWS La Crosse, WI

Counties Chickasaw County, IA, Fayette County, IA, Floyd County, IA, Howard County, IA, Mitchell County, IA, Mower County, MN

The radar

The La Crosse radar (KARX), 122 km from the middle of the area, began a volume at 09:25 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, 9.3 hours before the alert went out and 202 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 2021-03-13Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2021-03-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 square meters per square second.1939587897117136Sfc1 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
1554 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

524 
WWUS43 KARX 130920
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
320 AM CST Sat Mar 13 2021

...Winter Weather To Make A Return...

.Winter weather looks like it will return to the area starting
Sunday night and continue through Monday morning. Accumulating
snow is expected with amounts ranging from 4 to 6 inches, with
locally higher totals possible. This snow should impact the 
Monday morning commute with slippery road conditions. In addition,
east winds gusting as high as 30 mph will likely create some 
drifting of the heavy, wet snow.

IAZ008-009-018-019-131730-
/O.NEW.KARX.WS.A.0004.210315T0600Z-210315T1800Z/
Mitchell-Howard-Floyd-Chickasaw-
Including the cities of Osage, Cresco, Charles City, 
and New Hampton
320 AM CST Sat Mar 13 2021

...WINTER STORM WATCH IN EFFECT FROM SUNDAY NIGHT THROUGH MONDAY 
MORNING...

* WHAT...Heavy wet snow possible. Total snow accumulations of 4 to
  6 inches possible. East winds gusting as high as 30 mph will
  likely create some drifting snow.

* WHERE...Mitchell, Howard, Floyd and Chickasaw Counties.

* WHEN...From Sunday night through Monday morning.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Monday morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

04
4 follow-up statements
868 
WWUS43 KARX 131508
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
908 AM CST Sat Mar 13 2021

...Winter Weather Returning on Sunday Night...

.Winter weather will move into the area on Sunday night and 
continue through early Monday afternoon. Accumulating snow is 
expected with amounts ranging from 4 to 6 inches, with locally 
higher totals possible. This snow should impact the Monday morning
commute with slippery road conditions. In addition, east winds 
gusting as high as 30 mph will likely create some drifting of the 
heavy, wet snow.

IAZ008-009-018-019-132315-
/O.CON.KARX.WS.A.0004.210315T0600Z-210315T1800Z/
Mitchell-Howard-Floyd-Chickasaw-
Including the cities of Osage, Cresco, Charles City, 
and New Hampton
908 AM CST Sat Mar 13 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE SUNDAY NIGHT
THROUGH EARLY MONDAY AFTERNOON...

* WHAT...Heavy wet snow possible. Total snow accumulations of 4 
  to 6 inches possible.  Locally higher amounts possible.

* WHERE...Chickasaw, Floyd, Mitchell and Howard Counties.

* WHEN...From late Sunday night through early Monday afternoon.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Monday morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

Boyne
019 
WWUS43 KARX 131956
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
156 PM CST Sat Mar 13 2021

...Winter Weather Moving in Sunday Night...

.Winter weather will move into the area on Sunday night and
continue through Monday. Accumulating snow is expected with 
amounts ranging from 4 to 7 inches, with locally higher totals 
possible. This snow should impact the Monday morning commute with 
slippery road conditions. 

Depending on temperatures, there may be some light icing on
Monday afternoon. 

In addition, east winds gusting as high as 30 mph will likely 
create some drifting of the heavy, wet snow.

IAZ029-MNZ094-140400-
/O.EXB.KARX.WS.A.0004.210315T0600Z-210315T2300Z/
Fayette-Mower-
Including the cities of Oelwein and Austin
156 PM CST Sat Mar 13 2021

...WINTER STORM WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH
MONDAY AFTERNOON...

* WHAT...Heavy wet snow possible. Total snow accumulations of 4 
  to 6 inches and ice accumulations of a light glaze possible.

* WHERE...In Iowa, Fayette County. In Minnesota, Mower County.

* WHEN...From late Sunday night through Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

IAZ008-009-018-019-140400-
/O.EXT.KARX.WS.A.0004.210315T0600Z-210315T2300Z/
Mitchell-Howard-Floyd-Chickasaw-
Including the cities of Osage, Cresco, Charles City, 
and New Hampton
156 PM CST Sat Mar 13 2021

...WINTER STORM WATCH NOW IN EFFECT FROM LATE SUNDAY NIGHT
THROUGH MONDAY AFTERNOON...

* WHAT...Heavy wet snow possible. Total snow accumulations of 5 
  to 7 inches and ice accumulations of a light glaze possible.

* WHERE...Chickasaw, Floyd, Mitchell and Howard Counties.

* WHEN...From late Sunday night through Monday.

* 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. 

&&

$$

Boyne
934 
WWUS43 KARX 140314
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
914 PM CST Sat Mar 13 2021

...Winter Weather returns Sunday Night...

.Winter weather will move into the area on Sunday night continuing 
through Monday. Accumulating snow is expected with amounts ranging
from 4 to 7 inches. Locally higher totals are possible. This snow
would impact the Monday morning commute with slippery road 
conditions. Depending on temperatures, there may be some light 
icing Monday afternoon. In addition, east winds gusting as high as
30 mph will likely create some drifting of the heavy, wet snow.

IAZ008-009-018-019-029-MNZ094-141200-
/O.CON.KARX.WS.A.0004.210315T0600Z-210315T2300Z/
Mitchell-Howard-Floyd-Chickasaw-Fayette-Mower-
Including the cities of Osage, Cresco, Charles City, New Hampton,
Oelwein, and Austin
914 PM CST Sat Mar 13 2021

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

* WHAT...Heavy wet snow possible. Total snow accumulations of 4 
  to 7 inches and ice accumulations of a light glaze possible.

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

* WHEN...From late Sunday night through Monday afternoon.

* IMPACTS...Travel could be difficult. The hazardous conditions
  could impact the Monday morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

&&

$$

Peters
812 
WWUS43 KARX 140906
WSWARX

URGENT - WINTER WEATHER MESSAGE
National Weather Service La Crosse WI
406 AM CDT Sun Mar 14 2021

...Accumulating Snow Returns For Tonight And Monday...

.Snow will move into areas west of the Mississippi River late
tonight and then work northeast through Monday morning. As the
snow ends Monday afternoon, there is the potential for some light
freezing rain to occur. Accumulations of 3 to 5 inches are
expected in the advisory area and up to 6 inches in the warning.
Some light icing will be possible if the freezing rain occurs. In
addition, east winds gusting as high as 30 mph will likely create
some drifting snow. The winter weather could impact both the 
morning and evening commutes Monday.

IAZ018-141715-
/O.UPG.KARX.WS.A.0004.210315T0600Z-210315T2300Z/
/O.NEW.KARX.WS.W.0004.210315T0900Z-210315T2100Z/
Floyd-
Including the city of Charles City
406 AM CDT Sun Mar 14 2021

...WINTER STORM WARNING IN EFFECT FROM 4 AM TO 4 PM CDT MONDAY...

* WHAT...Heavy mixed precipitation expected. Total snow
  accumulations of 4 to 6 inches and ice accumulations of a light
  glaze. Winds gusting as high as 30 mph will likely create some 
  drifting snow.

* WHERE...Floyd County.

* WHEN...From 4 AM to 4 PM CDT Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ008-009-019-029-MNZ094-141715-
/O.UPG.KARX.WS.A.0004.210315T0600Z-210315T2300Z/
/O.NEW.KARX.WW.Y.0009.210315T0900Z-210315T2100Z/
Mitchell-Howard-Chickasaw-Fayette-Mower-
Including the cities of Osage, Cresco, New Hampton, Oelwein, 
and Austin
406 AM CDT Sun Mar 14 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 4 PM CDT
MONDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  3 to 5 inches and ice accumulations of a light glaze. Winds
  gusting as high as 35 mph will likely create some drifting snow.

* WHERE...In Iowa, Mitchell, Howard, Chickasaw and Fayette 
  Counties. In Minnesota, Mower County.

* WHEN...From 4 AM to 4 PM CDT Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ010-030-MNZ086-087-095-141715-
/O.NEW.KARX.WW.Y.0009.210315T0900Z-210315T2100Z/
Winneshiek-Clayton-Dodge-Olmsted-Fillmore-
Including the cities of Decorah, Elkader, Dodge Center, 
Rochester, and Preston
406 AM CDT Sun Mar 14 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 4 PM CDT
MONDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations 
  of 2 to 4 inches and ice accumulations of a light glaze.

* WHERE...In Iowa, Winneshiek and Clayton Counties. In 
  Minnesota, Dodge, Olmsted and Fillmore Counties.

* WHEN...From 4 AM to 4 PM CDT Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

IAZ011-MNZ079-088-096-WIZ032-033-041-053>055-061-141715-
/O.NEW.KARX.WW.Y.0009.210315T1200Z-210316T0000Z/
Allamakee-Wabasha-Winona-Houston-Buffalo-Trempealeau-La Crosse-
Vernon-Crawford-Richland-Grant-
Including the cities of Waukon, Wabasha, Winona, Caledonia, Alma,
Arcadia, Whitehall, La Crosse, Viroqua, Prairie Du Chien, 
Richland Center, and Platteville
406 AM CDT Sun Mar 14 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM TO 7 PM CDT
MONDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations 
  of 2 to 4 inches and ice accumulations of around one tenth of 
  an inch.

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

* WHEN...From 7 AM to 7 PM CDT Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

04

Nearby

Winter Storm Watches in Iowa, 2021Winter Storm Watches in Minnesota, 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.