Alert archive / Minnesota / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 44, NWS Duluth, MN

July 12, 2013Itasca County, Koochiching County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jul 12, 2013, 9:13 PM CDT for Itasca County, Koochiching County, Minnesota. It was in force for 47 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 12, 2013, 9:13 PM CDT (02:13 UTC)
Expired
Jul 12, 2013, 10:00 PM CDT
In force
47 min
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Itasca County, MN, Koochiching County, MN

The radar

The Duluth radar (KDLH), 162 km from the middle of the area, began a volume at 02:13 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 12, 3:55 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 2.2 hours before the alert went out and 83 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 2013-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1422 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 2013-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 93 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
1422 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
1176 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
93 m²/s²
0-3 km storm-relative helicity
175 m²/s²
Significant tornado parameter
1.1
Supercell composite
8.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 8:07 PM CDTSpecial Weather StatementDLHKoochiching38 min
Jul 12, 8:34 PM CDTSevere Thunderstorm WarningDLHItasca, Koochiching41 min
Jul 12, 10:11 PM CDTSpecial Weather StatementDLHItasca34 min
Jul 12, 10:32 PM CDTSpecial Weather StatementDLHCass28 min
Jul 12, 10:56 PM CDTSpecial Weather StatementDLHItasca34 min
Jul 12, 11:35 PM CDTSpecial Weather StatementDLHCass, Itasca, Saint Louis40 min
Jul 13, 12:22 AM CDTSpecial Weather StatementDLHSaint Louis38 min
Jul 13, 1:02 AM CDTSpecial Weather StatementDLHSaint Louis43 min
Jul 13, 1:47 AM CDTSpecial Weather StatementDLHSaint Louis43 min
Jul 13, 2:12 AM CDTSpecial Weather StatementDLHLake48 min
Jul 13, 2:36 AM CDTSpecial Weather StatementDLHKanabec39 min
Jul 13, 3:18 AM CDTSpecial Weather StatementDLHPine27 min
Jul 13, 4:03 AM CDTSpecial Weather StatementDLHPine42 min
Jul 13, 6:51 PM CDTSpecial Weather StatementDLH9 min
Jul 13, 2:56 AM CDTSpecial Weather StatementDLHBayfield49 min
Jul 13, 4:00 AM CDTSpecial Weather StatementDLHBayfield, Douglas30 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.