Alert archive / Minnesota / Severe Thunderstorm Watches in 2018

Severe Thunderstorm Watch 182

June 16, 201828 counties in Minnesota; 11 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at Jun 16, 2018, 9:47 PM CDT for 28 counties in Minnesota; 11 counties in Wisconsin. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 16, 2018, 9:47 PM CDT (02:47 UTC)
Expired
Jun 17, 2018, 4:23 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 39 counties

Aitkin County, MN, Becker County, MN, Benton County, MN, Carlton County, MN, Cass County, MN, Chisago County, MN, Cook County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Isanti County, MN, Itasca County, MN, Kanabec County, MN, Lake County, MN, Mille Lacs County, MN, Morrison County, MN, Otter Tail County, MN, Pine County, MN, Pope County, MN, Saint Louis County, MN, Sherburne County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Wadena County, MN, Wilkin County, MN, Ashland County, WI, Barron County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Iron County, WI, Polk County, WI, Price County, WI, Rusk County, WI, Sawyer County, WI, Washburn County, WI

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
50%
One or more gusts of 65 knots or more
20%
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
90%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 16, 10:02 PM CDTSevere Thunderstorm WarningDLHBurnett, Douglas, Washburn28 min
Jun 16, 10:12 PM CDTSevere Thunderstorm WarningMPXPope, Stearns33 min
Jun 16, 10:39 PM CDTFlash Flood WarningDLHAshland, Bayfield, Burnett, Douglas, Iron, Sawyer and 1 more8 hr
Jun 16, 10:52 PM CDTFlash Flood WarningFGFOtter Tail, Wadena6 hr
Jun 16, 11:06 PM CDTFlash Flood WarningDLHAitkin, Carlton, Pine5 hr
Jun 16, 11:11 PM CDTFlash Flood WarningDLHCass, Crow Wing4 hr
Jun 16, 11:37 PM CDTSevere Thunderstorm WarningMPXMorrison, Todd23 min
Jun 16, 11:46 PM CDTFlash Flood Warning EmergencyDLHBayfield5 hr
Jun 17, 12:11 AM CDTFlash Flood Warning EmergencyDLHCarlton, Pine5 hr
Jun 17, 12:15 AM CDTFlash Flood WarningFGFOtter Tail5 hr

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 00:00Z, 2.8 hours before the alert went out and 207 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 00:00Z on 2018-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4001 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2018-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 201 square meters per square second.193958Sfc1 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
4001 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
1122 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
201 m²/s²
0-3 km storm-relative helicity
519 m²/s²
Significant tornado parameter
6.0
Supercell composite
44.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 16, 9:01 PM CDTMesoscale DiscussionSPCBig Stone, Chippewa, Douglas, Grant, Kandiyohi, Lac qui Parle and 12 more119 min
Jun 16, 9:08 PM CDTMesoscale DiscussionSPCAitkin, Becker, Benton, Carlton, Cass, Crow Wing and 7 more67 min
Jun 16, 10:17 PM CDTMesoscale DiscussionSPCBig Stone, Traverse88 min
Jun 16, 11:44 PM CDTMesoscale DiscussionSPCAitkin, Anoka, Becker, Benton, Carlton, Cass and 28 more2 hr
Jun 17, 2:38 AM CDTMesoscale DiscussionSPCAitkin, Carlton, Chisago, Isanti, Kanabec, Mille Lacs and 1 more97 min
Jun 17, 12:12 PM CDTMesoscale DiscussionSPCAitkin, Anoka, Benton, Carlton, Carver, Chippewa and 20 more93 min
Jun 17, 12:34 PM CDTTornado WatchSPCAitkin, Anoka, Benton, Carlton, Chisago, Crow Wing and 10 more8 hr
Jun 17, 3:08 PM CDTMesoscale DiscussionSPCAnoka, Chisago, Hennepin, Isanti, Pine, Ramsey and 1 more97 min
Jun 17, 3:52 PM CDTMesoscale DiscussionSPCBlue Earth, Brown, Cottonwood, Jackson, Lyon, Martin and 8 more53 min
Jun 17, 5:23 PM CDTMesoscale DiscussionSPCAnoka, Chisago, Hennepin, Isanti, Ramsey, Sherburne and 2 more2 hr
Jun 17, 3:46 PM CDTSevere Thunderstorm WatchSPCClark, Florence, Forest, Langlade, Lincoln, Marathon and 10 more8 hr
Jun 17, 6:29 PM CDTMesoscale DiscussionSPCFlorence, Forest, Langlade, Lincoln, Marathon, Marinette and 8 more2 hr

Nearby

Severe Thunderstorm Watches in Minnesota, 2018Severe Thunderstorm Watches in Wisconsin, 2018Every severe thunderstorm watch in 2018

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.