Alert archive / Minnesota / Severe Thunderstorm Watches in 2020

Severe Thunderstorm Watch 239

June 2, 202019 counties in Iowa; 23 counties in Minnesota; 17 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at Jun 2, 2020, 4:39 PM CDT for 19 counties in Iowa; 23 counties in Minnesota; 17 counties in Wisconsin. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jun 2, 2020, 4:39 PM CDT (21:39 UTC)
Expired: Jun 2, 2020, 9:34 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 65 kt

All 59 counties

Allamakee County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clay County, IA, Clayton County, IA, Dickinson County, IA, Emmet County, IA, Fayette County, IA, Floyd County, IA, Hancock County, IA, Howard County, IA, Kossuth County, IA, Mitchell County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Blue Earth County, MN, Brown County, MN, Cottonwood County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Houston County, MN, Jackson County, MN, Le Sueur County, MN, Martin County, MN, Mower County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Olmsted County, MN, Rice County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Watonwan County, MN, Winona County, MN, Adams County, WI, Buffalo County, WI, Chippewa County, WI, Crawford County, WI, Dunn County, WI, Eau Claire County, WI, Grant County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Monroe County, WI, Pepin County, WI, Pierce County, WI, Richland County, WI, Saint Croix County, WI, Trempealeau County, WI, Vernon County, WI

The radar

The Minneapolis radar (KMPX), 119 km from the middle of the area, began a volume at 21:42 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: 10%
One or more EF2 to EF5 tornadoes: 5%
Ten or more severe wind reports: 60%
One or more gusts of 65 knots or more: 60%
Ten or more severe hail reports: 60%
One or more hailstones of 2 inches or more: 60%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 2, 4:48 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Nicollet	27 min
Jun 2, 5:09 PM CDT	Tornado Warning Tornado observed	MPX	Blue Earth	36 min
Jun 2, 5:14 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Martin, Watonwan	31 min
Jun 2, 5:18 PM CDT	Severe Thunderstorm Warning	ARX	Winona	42 min
Jun 2, 5:31 PM CDT	Severe Thunderstorm Warning	ARX	Jackson	44 min
Jun 2, 5:35 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Jackson, Trempealeau	40 min
Jun 2, 5:39 PM CDT	Tornado Warning Tornado observed	MPX	Blue Earth, Waseca	51 min
Jun 2, 5:42 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Martin, Watonwan	48 min
Jun 2, 5:52 PM CDT	Severe Thunderstorm Warning	ARX	Jackson, Trempealeau	38 min
Jun 2, 5:58 PM CDT	Severe Thunderstorm Warning	ARX	Winona	47 min
Jun 2, 5:59 PM CDT	Severe Thunderstorm Warning	ARX	Jackson, Trempealeau	31 min
Jun 2, 6:07 PM CDT	Severe Thunderstorm Warning	FSD	Osceola	36 min
Jun 2, 6:07 PM CDT	Severe Thunderstorm Warning	ARX	Winona	23 min
Jun 2, 6:09 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Jackson	39 min
Jun 2, 6:14 PM CDT	Severe Thunderstorm Warning	DMX	Emmet, Kossuth, Palo Alto	46 min
Jun 2, 6:17 PM CDT	Severe Thunderstorm Warning	FSD	Dickinson	43 min
Jun 2, 6:18 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn, Steele, Waseca	42 min
Jun 2, 6:19 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Martin	56 min
Jun 2, 6:25 PM CDT	Severe Thunderstorm Warning	ARX	Jackson, Juneau, La Crosse, Monroe, Trempealeau	50 min
Jun 2, 6:31 PM CDT	Severe Thunderstorm Warning	ARX	Dodge, Mower, Olmsted	89 min
Jun 2, 6:32 PM CDT	Severe Thunderstorm Warning	ARX	Houston, Winona	43 min
Jun 2, 6:32 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	58 min
Jun 2, 6:33 PM CDT	Severe Thunderstorm Warning	DMX	Winnebago, Worth	42 min
Jun 2, 6:44 PM CDT	Severe Thunderstorm Warning	ARX	Adams, Juneau	46 min
Jun 2, 6:55 PM CDT	Severe Thunderstorm Warning	ARX	Mitchell	80 min
Jun 2, 6:59 PM CDT	Severe Thunderstorm Warning	ARX	Adams, Juneau, Richland, Vernon	61 min
Jun 2, 7:07 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee	53 min
Jun 2, 7:13 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock, Winnebago, Worth	27 min
Jun 2, 7:18 PM CDT	Tornado Warning	ARX	Mower	27 min
Jun 2, 7:48 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Olmsted	44 min
Jun 2, 7:55 PM CDT	Severe Thunderstorm Warning	ARX	Chickasaw, Floyd, Howard, Mitchell	50 min
Jun 2, 8:18 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Houston, Winona	31 min

Discussions around it

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

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.7 hours before the alert went out and 119 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: 55 J/kg
Mixed-layer CIN: -557 J/kg
Mixed-layer LCL: 2144 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -33 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 2, 3:52 PM CDT	Mesoscale Discussion	SPC	Clay, Dickinson, Emmet, Howard, Kossuth, Lyon and 8 more	113 min
Jun 2, 5:32 PM CDT	Mesoscale Discussion	SPC	Allamakee, Cerro Gordo, Chickasaw, Clayton, Dickinson, Emmet and 7 more	118 min
Jun 2, 7:42 AM CDT	Mesoscale Discussion	SPC	Big Stone, Douglas, Grant, Lac qui Parle, Otter Tail, Stevens and 3 more	93 min
Jun 2, 1:27 PM CDT	Mesoscale Discussion	SPC	Benton, Big Stone, Chippewa, Douglas, Isanti, Kanabec and 14 more	93 min
Jun 2, 5:48 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Calumet, Columbia, Dane, Dodge, Fond du Lac and 24 more	5 hr

Nearby

Severe Thunderstorm Watches in Minnesota, 2020 Severe Thunderstorm Watches in Iowa, 2020 Severe Thunderstorm Watches in Wisconsin, 2020 Every severe thunderstorm watch in 2020

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.