Alert archive / Minnesota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 53, NWS Duluth, MN

July 24, 2015Cass County, Crow Wing County, Itasca County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jul 24, 2015, 2:21 AM CDT for Cass County, Crow Wing County, Itasca County, Minnesota. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 24, 2015, 2:21 AM CDT (07:21 UTC)
Expired
Jul 24, 2015, 2:45 AM CDT
In force
24 min
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Cass County, MN, Crow Wing County, MN, Itasca County, MN

The radar

The Duluth radar (KDLH), 138 km from the middle of the area, began a volume at 07:24 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.

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 7.4 hours before the alert went out and 185 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 2015-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1023 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, International Fa, MN at 00:00Z on 2015-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 square meters per square second.1939Sfc1 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
1023 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
1612 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.1
Supercell composite
3.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Duluth, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 23, 7:00 PM CDTSpecial Weather StatementDLHLake30 min
Jul 24, 1:24 AM CDTSpecial Weather StatementDLHCrow Wing36 min
Jul 24, 1:30 AM CDTSpecial Weather StatementDLHCass45 min
Jul 24, 1:51 AM CDTSevere Thunderstorm WarningDLHCass, Itasca39 min
Jul 24, 1:59 AM CDTSevere Thunderstorm WarningDLHCass31 min
Jul 24, 2:24 AM CDTSevere Thunderstorm WarningDLHCass, Itasca, Koochiching51 min
Jul 24, 2:38 AM CDTSpecial Weather StatementDLHPine22 min
Jul 24, 2:47 AM CDTSpecial Weather StatementDLHCass, Crow Wing43 min
Jul 24, 3:00 AM CDTSpecial Weather StatementDLHItasca45 min
Jul 24, 3:08 AM CDTSpecial Weather StatementDLHPine7 min
Jul 24, 3:16 AM CDTSpecial Weather StatementDLHAitkin29 min
Jul 24, 3:24 AM CDTSpecial Weather StatementDLHItasca36 min
Jul 24, 4:32 PM CDTSpecial Weather StatementDLHCrow Wing13 min
Jul 24, 5:03 PM CDTSpecial Weather StatementDLHKanabec12 min
Jul 24, 5:27 PM CDTSpecial Weather StatementDLH33 min
Jul 24, 5:32 PM CDTSpecial Weather StatementDLHPine13 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2015Every severe thunderstorm warning in 2015

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.