Alert archive / Wisconsin / Special Weather Statements in 2021
Special Weather Statement, NWS La Crosse, WI
NWS La Crosse, WI issued this special weather statement at Aug 21, 2021, 12:39 AM CDT for La Crosse County, Wisconsin; Houston County, Minnesota. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 21, 2021, 12:39 AM CDT (05:39 UTC)
- Expired
- Aug 21, 2021, 1:30 AM CDT
- In force
- 51 min
- Issued by
- NWS La Crosse, WI
- Hail
- 0.00 in
- Wind
- 30
Counties Houston County, MN, La Crosse County, WI
The radar
The La Crosse radar (KARX), 16 km from the middle of the area, began a volume at 05:41 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, 5.7 hours before the alert went out and 207 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.
- Mixed-layer CAPE
- 395 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 1368 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 233 m²/s²
- 0-3 km storm-relative helicity
- 303 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.4
The text
As transmitted.
184
WWUS83 KARX 210539
SPSARX
Special Weather Statement
National Weather Service La Crosse WI
1239 AM CDT Sat Aug 21 2021
IAZ010-011-MNZ088-095-096-WIZ041-053-210630-
Winneshiek IA-Allamakee IA-Fillmore MN-Winona MN-Houston MN-
Vernon WI-La Crosse WI-
1239 AM CDT Sat Aug 21 2021
...Strong thunderstorms will impact parts of northeast
Iowa...southeast Minnesota...and west-central Wisconsin
through 130 AM CDT...
At 1237 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 9 miles northeast of Canton to near Mabel to 6
miles southeast of Decorah. Movement was northeast at 40 mph.
HAZARD...Winds in excess of 30 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Strong thunderstorms will be near...
Spring Grove around 1250 AM CDT.
Rushford around 1255 AM CDT.
Caledonia and Houston around 100 AM CDT.
Hokah, New Albin and Brownsville around 115 AM CDT.
Dakota around 120 AM CDT.
La Crescent and Brice Prairie around 125 AM CDT.
La Crosse, Onalaska, Holmen, West Salem, Stoddard, French Island
and La Crosse Airport around 130 AM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4343 9173 4366 9190 4402 9153 4400 9144
4398 9142 4398 9133 4399 9132 4402 9134
4403 9134 4407 9131 4406 9128 4407 9127
4405 9122 4409 9119 4409 9117 4407 9115
4407 9102 4404 9100 4367 9097 4314 9170
TIME...MOT...LOC 0537Z 220DEG 36KT 4363 9182 4347 9170 4325 9168
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH
$$
JSBThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 10:27 PM CDT | Special Weather Statement | ARX | Buffalo | 48 min |
| Aug 20, 10:43 PM CDT | Special Weather Statement | ARX | Buffalo | 62 min |
| Aug 20, 11:26 PM CDT | Special Weather Statement | ARX | Buffalo | 64 min |
| Aug 20, 11:05 PM CDT | Special Weather Statement | ARX | Chickasaw, Howard, Winneshiek | 55 min |
| Aug 20, 11:56 PM CDT | Special Weather Statement | ARX | Howard, Winneshiek | 64 min |
Nearby
Special Weather Statements in Wisconsin, 2021Special Weather Statements in Minnesota, 2021Every special weather statement 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.