Alert archive / Minnesota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 106, NWS Duluth, MN

August 16, 2015Cass County, Crow Wing County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Aug 16, 2015, 12:50 AM CDT for Cass County, Crow Wing County, Minnesota. It was in force for 40 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
Aug 16, 2015, 12:50 AM CDT (05:50 UTC)
Expired
Aug 16, 2015, 1:30 AM CDT
In force
40 min
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Cass County, MN, Crow Wing County, MN

The radar

The Duluth radar (KDLH), 152 km from the middle of the area, began a volume at 05:52 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

Minneapolis, MN (KMPX), launched 00:00Z, 5.8 hours before the alert went out and 213 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 2015-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 140 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 2015-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 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
140 J/kg
Mixed-layer CIN
-264 J/kg
Mixed-layer LCL
1394 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
52 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 15, 11:49 PM CDTSpecial Weather StatementDLHKoochiching26 min
Aug 16, 12:07 AM CDTSpecial Weather StatementDLHItasca23 min
Aug 16, 12:14 AM CDTSpecial Weather StatementDLHKoochiching16 min
Aug 16, 12:15 AM CDTSpecial Weather StatementDLHCass30 min
Aug 16, 12:24 AM CDTSpecial Weather StatementDLHKoochiching36 min
Aug 16, 12:35 AM CDTSpecial Weather StatementDLHCrow Wing25 min
Aug 16, 12:41 AM CDTSpecial Weather StatementDLHItasca34 min
Aug 16, 12:55 AM CDTSpecial Weather StatementDLHKoochiching20 min
Aug 16, 1:18 AM CDTSpecial Weather StatementDLHItasca27 min
Aug 16, 1:30 AM CDTSevere Thunderstorm WarningDLHAitkin, Cass, Crow Wing27 min
Aug 16, 1:50 AM CDTSpecial Weather StatementDLHItasca10 min
Aug 16, 1:58 AM CDTSpecial Weather StatementDLHItasca32 min
Aug 16, 2:13 AM CDTSpecial Weather StatementDLH32 min
Aug 16, 2:27 AM CDTSpecial Weather StatementDLHSaint Louis33 min
Aug 16, 2:44 AM CDTSpecial Weather StatementDLH31 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.