Alert archive / Minnesota / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 83, NWS Duluth, MN

August 25, 2013Koochiching County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Aug 25, 2013, 1:28 AM CDT for Koochiching County, Minnesota. It was in force for 32 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 25, 2013, 1:28 AM CDT (06:28 UTC)
Expired
Aug 25, 2013, 2:00 AM CDT
In force
32 min
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Koochiching County, MN

The radar

The Duluth radar (KDLH), 196 km from the middle of the area, began a volume at 06:31 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, 6.5 hours before the alert went out and 51 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 2013-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2085 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 2013-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 114 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
2085 J/kg
Mixed-layer CIN
-60 J/kg
Mixed-layer LCL
1272 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
114 m²/s²
0-3 km storm-relative helicity
194 m²/s²
Significant tornado parameter
1.2
Supercell composite
9.1

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 24, 9:16 PM CDTSpecial Weather StatementDLHKoochiching29 min
Aug 24, 9:57 PM CDTSpecial Weather StatementDLHKoochiching33 min
Aug 25, 12:38 AM CDTSpecial Weather StatementDLHKoochiching22 min
Aug 25, 12:46 AM CDTSevere Thunderstorm WarningDLHKoochiching44 min
Aug 25, 2:03 AM CDTSpecial Weather StatementDLHKoochiching27 min
Aug 25, 2:13 AM CDTSpecial Weather StatementDLHKoochiching32 min
Aug 25, 2:50 AM CDTSpecial Weather StatementDLH25 min
Aug 25, 3:53 AM CDTSpecial Weather StatementDLHLake37 min
Aug 25, 4:36 AM CDTSpecial Weather StatementDLHCook39 min
Aug 25, 5:11 AM CDTSpecial Weather StatementDLHCook19 min
Aug 25, 5:20 AM CDTSpecial Weather StatementDLHCrow Wing25 min
Aug 25, 5:33 AM CDTSpecial Weather StatementDLHItasca27 min
Aug 25, 5:34 AM CDTSpecial Weather StatementDLHCass41 min
Aug 25, 8:20 AM CDTSpecial Weather StatementDLHLake25 min
Aug 25, 8:45 AM CDTSpecial Weather StatementDLHItasca15 min
Aug 25, 6:03 PM CDTSpecial Weather StatementDLHHubbard42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2013Every severe thunderstorm warning in 2013

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.