Alert archive / Wisconsin / Special Weather Statements in 2021

Special Weather Statement, NWS Milwaukee, WI

July 28, 2021Iowa County, Lafayette County, Wisconsin

NWS Milwaukee, WI issued this special weather statement at Jul 28, 2021, 1:52 AM CDT for Iowa County, Lafayette County, Wisconsin. It was in force for 53 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 28, 2021, 1:52 AM CDT (06:52 UTC)
Expired: Jul 28, 2021, 2:45 AM CDT
In force: 53 min
Issued by: NWS Milwaukee, WI

Counties Iowa County, WI, Lafayette County, WI

The radar

The Milwaukee radar (KMKX), 125 km from the middle of the area, began a volume at 06:55 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.

What was reported inside it

Time	Report	Where	Remark
Jul 28, 2:40 AM CDT	TSTM WND DMG	2 N Gratiot, WI	A FEW TREES DOWN. TIME ESTIMATED BASED ON RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 6.9 hours before the alert went out and 143 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: 1554 J/kg
Mixed-layer CIN: -284 J/kg
Mixed-layer LCL: 1342 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 148 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

980 
WWUS83 KMKX 280652
SPSMKX

Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
152 AM CDT Wed Jul 28 2021

WIZ062-063-067-280745-
Lafayette-Iowa-Dane-

...A STRONG THUNDERSTORM WILL AFFECT LAFAYETTE...IOWA AND
SOUTHWESTERN DANE COUNTIES...

At 150 AM CDT, a strong thunderstorm was located 8 miles southeast of
Fennimore, or 10 miles east of Lancaster, moving southeast at 35 mph.

Winds of 40 to 50 mph and half inch hail are possible with this
storm.

Locations impacted include...
Dodgeville, Mineral Point, Darlington, Shullsburg, Belmont, Benton,
Argyle, Blanchardville, Wiota, Highland, Ridgeway, Linden, New
Diggings, South Wayne, Waldwick, Elk Grove, Cobb, Fayette, Lamont and
Rewey.

If outdoors, consider seeking shelter inside a building.

LAT...LON 4318 9042 4296 8980 4286 8980 4286 8984
      4251 8984 4251 9043
TIME...MOT...LOC 0650Z 303DEG 30KT 4290 9052 

$$

MRC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 12:12 AM CDT	Special Weather Statement	MKX	Iowa, Sauk	63 min
Jul 28, 1:12 AM CDT	Special Weather Statement	MKX	Columbia, Dane, Iowa, Sauk	63 min
Jul 28, 2:09 AM CDT	Special Weather Statement	MKX	Dane	66 min
Jul 28, 2:28 AM CDT	Severe Thunderstorm Warning	MKX	Lafayette	47 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.