Alert archive / Minnesota / Severe Thunderstorm Watches in 2011

Severe Thunderstorm Watch 392

May 28, 201130 counties in Minnesota; 17 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at May 28, 2011, 2:11 PM CDT for 30 counties in Minnesota; 17 counties in Wisconsin. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 28, 2011, 2:11 PM CDT (19:11 UTC)
Expired
May 28, 2011, 8:12 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 47 counties

Aitkin County, MN, Anoka County, MN, Benton County, MN, Blue Earth County, MN, Brown County, MN, Carlton County, MN, Carver County, MN, Chisago County, MN, Dakota County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Lake County, MN, Le Sueur County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Nicollet County, MN, Pine County, MN, Ramsey County, MN, Rice County, MN, Saint Louis County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Steele County, MN, Waseca County, MN, Washington County, MN, Wright County, MN, Ashland County, WI, Barron County, WI, Bayfield County, WI, Burnett County, WI, Chippewa County, WI, Douglas County, WI, Dunn County, WI, Eau Claire County, WI, Iron County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Price County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 93 km from the middle of the area, began a volume at 19:11 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
5%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
50%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 28, 2:16 PM CDTSevere Thunderstorm WarningMPXCarver, Dakota, Le Sueur, McLeod, Rice, Scott and 1 more44 min
May 28, 2:25 PM CDTSevere Thunderstorm WarningDLHLake, Saint Louis50 min
May 28, 2:39 PM CDTTornado WarningMPXCarver, Scott, Sibley36 min
May 28, 2:46 PM CDTSevere Thunderstorm WarningDLHLake, Saint Louis44 min
May 28, 3:00 PM CDTTornado WarningDLHLake45 min
May 28, 3:06 PM CDTTornado WarningMPXCarver, Le Sueur, Rice, Scott, Sibley39 min
May 28, 3:33 PM CDTSevere Thunderstorm WarningDLHCook, Lake19 min
May 28, 3:45 PM CDTSevere Thunderstorm WarningMPXDakota, Goodhue, Rice, Scott45 min
May 28, 3:57 PM CDTTornado WarningMPXDakota, Goodhue, Rice, Scott33 min
May 28, 4:35 PM CDTSevere Thunderstorm WarningDLHCook, Lake25 min
May 28, 4:35 PM CDTSevere Thunderstorm WarningMPXDakota, Goodhue40 min
May 28, 5:08 PM CDTSevere Thunderstorm WarningDLHAitkin, Pine37 min
May 28, 5:36 PM CDTSevere Thunderstorm WarningDLHCarlton, Pine39 min
May 28, 5:39 PM CDTSevere Thunderstorm WarningDLHLake, Saint Louis51 min
May 28, 6:03 PM CDTSevere Thunderstorm WarningDLHCarlton, Saint Louis42 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, 7.2 hours before the alert went out and 153 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-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2011-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2011-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 135 square meters per square second.1939587897117136156Sfc1 km3 km6 km9 kmRMLM
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
918 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
135 m²/s²
0-3 km storm-relative helicity
172 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.

IssuedProductOfficeCountiesLasted
May 28, 1:11 PM CDTMesoscale DiscussionSPCAitkin, Anoka, Becker, Beltrami, Benton, Carlton and 38 more94 min
May 28, 5:22 PM CDTMesoscale DiscussionSPCAitkin, Anoka, Carlton, Chisago, Dakota, Goodhue and 9 more53 min

Nearby

Severe Thunderstorm Watches in Minnesota, 2011Severe Thunderstorm Watches in Wisconsin, 2011Every severe thunderstorm watch in 2011

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.