Alert archive / Wisconsin / Special Weather Statements in 2021

Special Weather Statement, NWS La Crosse, WI

October 20, 2021Clark County, Jackson County, Wisconsin

NWS La Crosse, WI issued this special weather statement at Oct 20, 2021, 3:01 PM CDT for Clark County, Jackson County, Wisconsin. It was in force for 44 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: Oct 20, 2021, 3:01 PM CDT (20:01 UTC)
Expired: Oct 20, 2021, 3:45 PM CDT
In force: 44 min
Issued by: NWS La Crosse, WI
Hail: 0.25 in
Wind: 30

Counties Clark County, WI, Jackson County, WI

The radar

The La Crosse radar (KARX), 104 km from the middle of the area, began a volume at 20:02 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.0 hours before the alert went out and 208 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1547 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 328 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

404 
WWUS83 KARX 202001
SPSARX

Special Weather Statement
National Weather Service La Crosse WI
301 PM CDT Wed Oct 20 2021
 
WIZ029-034-202045-
Jackson WI-Clark WI-
301 PM CDT Wed Oct 20 2021

...Strong thunderstorms will impact portions of Clark and central
Jackson Counties through 345 PM CDT...

At 300 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Lake Wissota to near Humbird to near Black
River Falls. Movement was northeast at 45 mph.

HAZARD...Pea size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

Locations impacted include...
Black River Falls, Neillsville, Thorp, Loyal, Greenwood, Owen, Price,
Humbird, Hatfield, Shortville, Lynn, Longwood, Reseburg, Northfield,
Merrillan, Willard, Alma Center, Levis, Withee and Hixton.

This includes Interstate 94 between mile markers 98 and 121.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4503 9032 4435 9032 4420 9099 4460 9116
      4460 9092 4503 9092
TIME...MOT...LOC 2000Z 240DEG 39KT 4494 9126 4448 9082 4423 9091 

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...<30 MPH

$$

Peters

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 20, 1:44 PM CDT	Special Weather Statement	ARX	Buffalo	61 min
Oct 20, 2:30 PM CDT	Special Weather Statement	ARX	Trempealeau	30 min
Oct 20, 12:35 PM CDT	Special Weather Statement	ARX	Howard	25 min
Oct 19, 8:06 PM CDT	Special Weather Statement	ARX	Fillmore	24 min
Oct 20, 1:12 PM CDT	Special Weather Statement	ARX	Fillmore	63 min

Nearby

Special Weather Statements in Wisconsin, 2021 Every 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.