Alert archive / Wisconsin / Severe Thunderstorm Watches in 2013

Severe Thunderstorm Watch 261

May 31, 20134 states

The Storm Prediction Center issued this severe thunderstorm watch at May 31, 2013, 2:35 PM CDT for 4 states. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued: May 31, 2013, 2:35 PM CDT (19:35 UTC)
Expired: Jun 1, 2013, 12:00 AM CDT
In force: 9 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 74 counties

Allamakee County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Floyd County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Baraga County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Ontonagon County, MI, Anoka County, MN, Carlton County, MN, Chisago County, MN, Cook County, MN, Dakota County, MN, Dodge County, MN, Fillmore County, MN, Goodhue County, MN, Houston County, MN, Isanti County, MN, Kanabec County, MN, Lake County, MN, Mower County, MN, Olmsted County, MN, Pine County, MN, Ramsey County, MN, Saint Louis County, MN, Wabasha County, MN, Washington County, MN, Winona County, MN, Adams County, WI, Ashland County, WI, Barron County, WI, Bayfield County, WI, Buffalo County, WI, Burnett County, WI, Chippewa County, WI, Clark County, WI, Crawford County, WI, Douglas County, WI, Dunn County, WI, Eau Claire County, WI, Forest County, WI, Grant County, WI, Iron County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Monroe County, WI, Oneida County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Portage County, WI, Price County, WI, Richland County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Shawano County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI, Vilas County, WI, Washburn County, WI, Waupaca County, WI, Waushara County, WI, Wood County, WI

The radar

The Duluth radar (KDLH), 114 km from the middle of the area, began a volume at 19:36 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: 20%
One or more EF2 to EF5 tornadoes: 2%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 60%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
May 31, 2:50 PM CDT	Severe Thunderstorm Warning	DLH	Douglas, Washburn	25 min
May 31, 3:03 PM CDT	Severe Thunderstorm Warning	ARX	Olmsted, Wabasha, Winona	57 min
May 31, 3:15 PM CDT	Severe Thunderstorm Warning	DLH	Douglas	45 min
May 31, 3:16 PM CDT	Severe Thunderstorm Warning	DLH	Carlton, Saint Louis	44 min
May 31, 3:20 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Dunn, Eau Claire, Pepin	40 min
May 31, 3:29 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	46 min
May 31, 3:29 PM CDT	Severe Thunderstorm Warning	DLH	Iron	46 min
May 31, 3:40 PM CDT	Severe Thunderstorm Warning	MQT	Gogebic	50 min
May 31, 3:47 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	28 min
May 31, 3:56 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	19 min
May 31, 4:01 PM CDT	Severe Thunderstorm Warning	MPX	Eau Claire	29 min
May 31, 4:03 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo	27 min
May 31, 4:21 PM CDT	Severe Thunderstorm Warning	MPX	Eau Claire	24 min
May 31, 4:24 PM CDT	Severe Thunderstorm Warning	ARX	Jackson, Trempealeau	36 min
May 31, 5:09 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Polk	21 min
May 31, 5:11 PM CDT	Severe Thunderstorm Warning	MPX	Saint Croix	19 min
May 31, 5:22 PM CDT	Severe Thunderstorm Warning	DLH	Ashland	23 min
May 31, 5:27 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Dunn, Polk, Saint Croix	33 min
May 31, 5:30 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	45 min
May 31, 5:31 PM CDT	Severe Thunderstorm Warning	DLH	Ashland, Iron, Price, Sawyer	44 min
May 31, 5:33 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Polk	27 min
May 31, 5:36 PM CDT	Severe Thunderstorm Warning	DLH	Price	39 min
May 31, 5:39 PM CDT	Severe Thunderstorm Warning	MPX	Dunn, Saint Croix	21 min
May 31, 5:57 PM CDT	Severe Thunderstorm Warning	MPX	Dunn	33 min
May 31, 6:00 PM CDT	Severe Thunderstorm Warning	DLH	Bayfield	45 min
May 31, 6:09 PM CDT	Severe Thunderstorm Warning	MPX	Dunn	21 min
May 31, 6:22 PM CDT	Severe Thunderstorm Warning	MPX	Dunn	23 min
May 31, 6:26 PM CDT	Tornado Warning Tornado observed	ARX	Howard, Mitchell	34 min
May 31, 6:27 PM CDT	Severe Thunderstorm Warning	ARX	Wabasha, Winona	63 min
May 31, 6:30 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Dunn	30 min
May 31, 6:35 PM CDT	Severe Thunderstorm Warning	MQT	Dickinson, Iron	25 min
May 31, 6:42 PM CDT	Severe Thunderstorm Warning	MPX	Eau Claire, Pepin	33 min
May 31, 6:55 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Dunn, Eau Claire	35 min
May 31, 6:59 PM CDT	Severe Thunderstorm Warning	MQT	Baraga, Dickinson, Iron, Marquette	46 min
May 31, 7:02 PM CDT	Severe Thunderstorm Warning	GRB	Florence, Forest, Oneida, Vilas	58 min
May 31, 7:08 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Rusk	37 min
May 31, 7:37 PM CDT	Severe Thunderstorm Warning	MQT	Baraga, Marquette	38 min
May 31, 8:01 PM CDT	Tornado Warning	ARX	Jackson, Trempealeau	29 min
May 31, 8:27 PM CDT	Tornado Warning	ARX	Clark, Jackson	33 min
May 31, 8:43 PM CDT	Severe Thunderstorm Warning	ARX	Mower, Olmsted	62 min
May 31, 9:03 PM CDT	Severe Thunderstorm Warning	ARX	Howard, Mitchell	42 min
May 31, 9:24 PM CDT	Severe Thunderstorm Warning	ARX	Olmsted, Wabasha, Winona	66 min
May 31, 9:41 PM CDT	Tornado Warning	ARX	Olmsted	34 min
May 31, 9:44 PM CDT	Severe Thunderstorm Warning	MPX	Dunn, Pepin	46 min
May 31, 9:45 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo	15 min
May 31, 9:50 PM CDT	Severe Thunderstorm Warning	ARX	Howard, Mitchell, Winneshiek	55 min
May 31, 9:50 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Rusk	40 min
May 31, 10:20 PM CDT	Flash Flood Warning	ARX	Mitchell	6 hr
May 31, 10:25 PM CDT	Severe Thunderstorm Warning	ARX	Winona	50 min
May 31, 10:48 PM CDT	Severe Thunderstorm Warning	ARX	Floyd, Howard, Mitchell	42 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, 7.6 hours before the alert went out and 222 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: 60 J/kg
Mixed-layer CIN: -221 J/kg
Mixed-layer LCL: 1191 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 256 m²/s²
0-3 km storm-relative helicity: 269 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 30, 7:41 PM CDT	Mesoscale Discussion	SPC	Cass, Crawford, Fremont, Harrison, Ida, Mills and 6 more	2 hr
May 31, 12:26 PM CDT	Mesoscale Discussion	SPC	Lenawee, Macomb, Monroe, Oakland, Saint Clair, Sanilac and 2 more	94 min
May 31, 2:12 PM CDT	Mesoscale Discussion	SPC	Chisago, Dakota, Goodhue, Pine, Ramsey, Wabasha and 1 more	2 hr
May 30, 9:14 PM CDT	Mesoscale Discussion	SPC	Brown, Calumet, Kenosha, Kewaunee, Manitowoc, Marinette and 7 more	61 min

Nearby

Severe Thunderstorm Watches in Wisconsin, 2013 Severe Thunderstorm Watches in Minnesota, 2013 Severe Thunderstorm Watches in Iowa, 2013 Every severe thunderstorm watch in 2013

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.