Alert archive / Minnesota / Severe Thunderstorm Watches in 2018

Severe Thunderstorm Watch 244

June 29, 201825 counties in Minnesota; Bayfield County, Douglas County, Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at Jun 29, 2018, 11:56 PM CDT for 25 counties in Minnesota; Bayfield County, Douglas County, Wisconsin. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jun 29, 2018, 11:56 PM CDT (04:56 UTC)
Expired
Jun 30, 2018, 5:20 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 27 counties

Aitkin County, MN, Benton County, MN, Carlton County, MN, Cass County, MN, Chippewa County, MN, Cook County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Itasca County, MN, Kanabec County, MN, Kandiyohi County, MN, Lac qui Parle 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, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Wadena County, MN, Bayfield County, WI, Douglas County, WI

The radar

The Duluth radar (KDLH), 89 km from the middle of the area, began a volume at 04:58 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
5%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 29, 11:58 PM CDTSevere Thunderstorm WarningMPXTodd47 min
Jun 30, 12:05 AM CDTSevere Thunderstorm WarningMPXDouglas, Pope55 min
Jun 30, 12:15 AM CDTSevere Thunderstorm WarningFGFWadena37 min
Jun 30, 12:18 AM CDTSevere Thunderstorm WarningMPXTodd42 min
Jun 30, 12:43 AM CDTSevere Thunderstorm WarningMPXStearns, Todd47 min
Jun 30, 1:06 AM CDTSevere Thunderstorm WarningMPXMorrison39 min
Jun 30, 1:29 AM CDTSevere Thunderstorm WarningMPXMorrison, Stearns, Todd46 min
Jun 30, 1:41 AM CDTSevere Thunderstorm WarningDLHAitkin, Crow Wing49 min
Jun 30, 2:02 AM CDTSevere Thunderstorm WarningMPXBenton, Mille Lacs, Morrison, Stearns43 min
Jun 30, 2:27 AM CDTSevere Thunderstorm WarningMPXKanabec, Mille Lacs33 min
Jun 30, 2:28 AM CDTSevere Thunderstorm WarningDLHAitkin, Carlton, Pine, Saint Louis32 min
Jun 30, 3:00 AM CDTSevere Thunderstorm WarningDLHAitkin, Carlton, Pine, Saint Louis45 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 00:00Z, 4.9 hours before the alert went out and 188 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 2018-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3333 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 2018-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 142 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
3333 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
1867 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
142 m²/s²
0-3 km storm-relative helicity
233 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
Jun 29, 10:57 PM CDTMesoscale DiscussionSPCAitkin, Benton, Big Stone, Carlton, Cass, Chippewa and 16 more63 min
Jun 30, 3:21 AM CDTMesoscale DiscussionSPCAitkin, Carlton, Cook, Itasca, Kanabec, Lake and 2 more114 min
Jun 30, 12:40 PM CDTMesoscale DiscussionSPCDodge, Faribault, Fillmore, Freeborn, Martin, Mower and 3 more3 hr
Jun 30, 1:39 PM CDTSevere Thunderstorm WatchSPCBlue Earth, Dakota, Dodge, Faribault, Fillmore, Freeborn and 13 more7 hr
Jun 30, 3:40 PM CDTMesoscale DiscussionSPCDodge, Fillmore, Freeborn, Goodhue, Houston, Mower and 4 more2 hr
Jun 30, 4:23 PM CDTMesoscale DiscussionSPCAdams, Brown, Calumet, Clark, Columbia, Crawford and 34 more67 min
Jun 30, 4:41 PM CDTSevere Thunderstorm WatchSPCBrown, Calumet, Columbia, Dane, Florence, Forest and 21 more6 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; radar from the NEXRAD Level II archive.