Alert archive / Wisconsin / Tornado Watches in 2024

Tornado Watch 279

May 21, 202420 counties in Wisconsin

The Storm Prediction Center issued this tornado watch at May 21, 2024, 3:58 PM CDT for 20 counties in Wisconsin. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued: May 21, 2024, 3:58 PM CDT (20:58 UTC)
Expired: May 22, 2024, 12:50 AM CDT
In force: 9 hr
Issued by: the Storm Prediction Center
Largest hail expected: 3 in
Strongest gust expected: 65 kt

Counties Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Kenosha County, WI, Lafayette County, WI, Marquette County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Rock County, WI, Sauk County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 83 km from the middle of the area, began a volume at 20:59 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 50%
One or more EF2 to EF5 tornadoes: 30%
Ten or more severe wind reports: 70%
One or more gusts of 65 knots or more: 50%
Ten or more severe hail reports: 50%
One or more hailstones of 2 inches or more: 40%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

42 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 21, 4:45 PM CDT	Severe Thunderstorm Warning	MKX	Iowa	30 min
May 21, 6:03 PM CDT	Severe Thunderstorm Warning	MKX	Iowa, Lafayette	42 min
May 21, 6:27 PM CDT	Severe Thunderstorm Warning	MKX	Iowa, Lafayette	48 min
May 21, 6:28 PM CDT	Severe Thunderstorm Warning	MKX	Sauk	47 min
May 21, 6:47 PM CDT	Severe Thunderstorm Warning	MKX	Iowa, Lafayette	58 min
May 21, 6:48 PM CDT	Tornado Warning	MKX	Columbia, Dane, Iowa, Sauk	27 min
May 21, 7:04 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane, Green, Sauk	56 min
May 21, 7:07 PM CDT	Tornado Warning	MKX	Dane, Iowa	23 min
May 21, 7:10 PM CDT	Tornado Warning	MKX	Columbia, Sauk	35 min
May 21, 7:18 PM CDT	Tornado Warning	MKX	Columbia, Dane, Iowa, Sauk	42 min
May 21, 7:28 PM CDT	Tornado Warning	MKX	Columbia, Green Lake, Marquette, Sauk	47 min
May 21, 7:41 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MKX	Dane, Green, Iowa, Lafayette	64 min
May 21, 7:47 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MKX	Columbia, Dane, Green Lake, Marquette	73 min
May 21, 7:51 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MKX	Dane, Jefferson, Rock	39 min
May 21, 7:52 PM CDT	Tornado Warning	MKX	Columbia, Dane, Dodge	38 min
May 21, 7:56 PM CDT	Tornado Warning	MKX	Green, Lafayette	34 min
May 21, 7:58 PM CDT	Tornado Warning	MKX	Dane	32 min
May 21, 8:04 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MKX	Columbia, Dane, Dodge, Fond du Lac, Green Lake, Marquette and 1 more	56 min
May 21, 8:11 PM CDT	Tornado Warning	MKX	Fond du Lac, Green Lake, Marquette	34 min
May 21, 8:18 PM CDT	Tornado Warning	MKX	Dodge, Fond du Lac	42 min
May 21, 8:22 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MKX	Iowa, Sauk	38 min
May 21, 8:32 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MKX	Dane, Dodge, Green, Jefferson, Rock, Waukesha	71 min
May 21, 8:41 PM CDT	Tornado Warning	MKX	Fond du Lac	34 min
May 21, 8:44 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Green, Iowa, Lafayette	46 min
May 21, 8:47 PM CDT	Severe Thunderstorm Warning	MKX	Rock, Walworth	28 min
May 21, 8:52 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Green Lake, Marquette, Sauk	23 min
May 21, 8:59 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dodge, Fond du Lac, Sheboygan, Washington	46 min
May 21, 9:00 PM CDT	Tornado Warning	MKX	Fond du Lac, Sheboygan	30 min
May 21, 9:03 PM CDT	Severe Thunderstorm Warning	MKX	Fond du Lac	27 min
May 21, 9:13 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Waukesha	32 min
May 21, 9:22 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MKX	Fond du Lac, Sheboygan	38 min
May 21, 9:28 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Green	47 min
May 21, 9:39 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane, Dodge	36 min
May 21, 10:10 PM CDT	Severe Thunderstorm Warning	MKX	Green, Rock	50 min
May 21, 10:14 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Dodge, Jefferson	46 min
May 21, 10:25 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Dodge, Jefferson, Rock	50 min
May 21, 10:40 PM CDT	Tornado Warning	MKX	Dane, Jefferson	19 min
May 21, 10:45 PM CDT	Tornado Warning	MKX	Dane, Jefferson, Rock	30 min
May 21, 10:48 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Jefferson, Rock	42 min
May 21, 11:33 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Walworth, Waukesha	42 min
May 21, 11:47 PM CDT	Severe Thunderstorm Warning	MKX	Racine, Walworth, Waukesha	43 min
May 22, 12:10 AM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Ozaukee, Washington, Waukesha	31 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 21, 12:32 PM CDT	Mesoscale Discussion	SPC	Crawford, Grant, La Crosse, Vernon	118 min
May 21, 1:14 PM CDT	Tornado Watch PDS	SPC	Buffalo, Crawford, Grant, La Crosse, Pepin, Richland and 2 more	8 hr
May 21, 1:15 PM CDT	Mesoscale Discussion	SPC	Adams, Calumet, Columbia, Dane, Dodge, Fond du Lac and 9 more	90 min
May 21, 5:09 PM CDT	Mesoscale Discussion	SPC	Crawford	96 min
May 21, 6:18 PM CDT	Mesoscale Discussion	SPC	Adams, Barron, Calumet, Chippewa, Clark, Dunn and 18 more	87 min
May 21, 6:42 PM CDT	Tornado Watch	SPC	Adams, Brown, Calumet, Chippewa, Clark, Door and 20 more	5 hr

Nearby

Tornado Watches in Wisconsin, 2024 Every tornado watch in 2024

Sources

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