Alert archive / Minnesota / Severe Thunderstorm Watches in 2011

Severe Thunderstorm Watch 598

July 4, 201144 counties in Minnesota; 8 counties in North Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jul 4, 2011, 7:14 PM CDT for 44 counties in Minnesota; 8 counties in North Dakota. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued
Jul 4, 2011, 7:14 PM CDT (00:14 UTC)
Expired
Jul 5, 2011, 4:00 AM CDT
In force
9 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 52 counties

Aitkin County, MN, Becker County, MN, Beltrami County, MN, Benton County, MN, Carlton County, MN, Cass County, MN, Chippewa County, MN, Clay County, MN, Clearwater County, MN, Cook County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Itasca County, MN, Kanabec County, MN, Kandiyohi County, MN, Koochiching County, MN, Lac qui Parle County, MN, Lake County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Pine County, MN, Polk County, MN, Pope County, MN, Red Lake County, MN, Redwood County, MN, Renville County, MN, Roseau County, MN, Saint Louis County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Wadena County, MN, Wilkin County, MN, Yellow Medicine County, MN, Barnes County, ND, Cass County, ND, Grand Forks County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Traill County, ND

The radar

The Duluth radar (KDLH), 169 km from the middle of the area, began a volume at 00:15 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
10%
Ten or more severe wind reports
90%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 4, 7:19 PM CDTSevere Thunderstorm WarningFGFMarshall, Pennington, Polk, Red Lake56 min
Jul 4, 7:43 PM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater, Lake of the Woods48 min
Jul 4, 7:55 PM CDTTornado WarningFGFPolk, Red Lake50 min
Jul 4, 8:06 PM CDTSevere Thunderstorm WarningDLHItasca, Koochiching, Saint Louis54 min
Jul 4, 8:17 PM CDTSevere Thunderstorm WarningFGFNorman, Polk58 min
Jul 4, 8:50 PM CDTSevere Thunderstorm WarningDLHCass, Itasca, Saint Louis55 min
Jul 4, 8:50 PM CDTTornado WarningFGFNorman, Polk40 min
Jul 4, 8:55 PM CDTSevere Thunderstorm WarningDLHKoochiching, Saint Louis65 min
Jul 4, 9:12 PM CDTSevere Thunderstorm WarningFGFClay, Norman63 min
Jul 4, 9:21 PM CDTTornado WarningFGFClay39 min
Jul 4, 9:40 PM CDTSevere Thunderstorm WarningFGFClay65 min
Jul 4, 9:41 PM CDTSevere Thunderstorm WarningDLHItasca, Saint Louis64 min
Jul 4, 9:48 PM CDTSevere Thunderstorm WarningDLHCass, Itasca27 min
Jul 4, 9:51 PM CDTSevere Thunderstorm WarningDLHLake, Saint Louis39 min
Jul 4, 9:51 PM CDTTornado WarningFGFCass39 min
Jul 4, 10:06 PM CDTSevere Thunderstorm WarningDLHCook, Lake, Saint Louis54 min
Jul 4, 10:11 PM CDTSevere Thunderstorm WarningDLHAitkin, Cass, Itasca49 min
Jul 4, 10:25 PM CDTSevere Thunderstorm WarningDLHLake, Saint Louis35 min
Jul 4, 10:26 PM CDTSevere Thunderstorm WarningFGFCass, Ransom, Richland, Sargent64 min
Jul 4, 10:29 PM CDTSevere Thunderstorm WarningFGFClay, Otter Tail, Wilkin61 min
Jul 4, 10:34 PM CDTSevere Thunderstorm WarningDLHCook, Lake, Saint Louis41 min
Jul 4, 10:51 PM CDTSevere Thunderstorm WarningDLHCook39 min
Jul 4, 10:54 PM CDTSevere Thunderstorm WarningDLHAitkin, Carlton, Cass, Crow Wing, Saint Louis51 min
Jul 4, 10:57 PM CDTSevere Thunderstorm WarningDLHCarlton, Lake, Saint Louis48 min
Jul 4, 11:14 PM CDTSevere Thunderstorm WarningDLHCook, Lake13 min
Jul 4, 11:31 PM CDTSevere Thunderstorm WarningFGFGrant, Otter Tail, Wilkin59 min
Jul 5, 12:35 AM CDTSevere Thunderstorm WarningMPXStevens55 min
Jul 5, 12:40 AM CDTSevere Thunderstorm WarningFGFGrant26 min
Jul 5, 1:20 AM CDTSevere Thunderstorm WarningMPXLac qui Parle55 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

International Fa, MN (KINL), launched 00:00Z, 0.2 hours before the alert went out and 123 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, International Fa, MN at 00:00Z on 2011-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1540 joules per kilogram.LCLEL10008507005003002001001 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, International Fa, MN at 00:00Z on 2011-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.19395878Sfc1 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
1540 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1783 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
33 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 4, 10:42 PM CDTMesoscale DiscussionSPCAitkin, Becker, Benton, Carlton, Cass, Clay and 19 more2 hr
Jul 4, 11:41 PM CDTSevere Thunderstorm WatchSPCBig Stone, Cottonwood, Lincoln, Lyon, Murray, Pipestone and 1 more5 hr
Jul 5, 12:29 PM CDTMesoscale DiscussionSPCHouston91 min
Jul 5, 3:32 PM CDTMesoscale DiscussionSPCNobles, Rock88 min

Nearby

Severe Thunderstorm Watches in Minnesota, 2011Severe Thunderstorm Watches in North Dakota, 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.