Alert archive / Minnesota / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 42, NWS Duluth, MN

July 7, 2013Koochiching County, Saint Louis County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jul 7, 2013, 7:29 PM CDT for Koochiching County, Saint Louis County, Minnesota. It was in force for 46 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 7, 2013, 7:29 PM CDT (00:29 UTC)
Expired
Jul 7, 2013, 8:15 PM CDT
In force
46 min
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Koochiching County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 138 km from the middle of the area, began a volume at 00:30 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, 0.5 hours before the alert went out and 343 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 2013-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1851 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 2013-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
1851 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
1349 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.7

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 8:15 PM CDTSpecial Weather StatementDLHPine30 min
Jul 7, 9:24 PM CDTSpecial Weather StatementDLHItasca36 min
Jul 8, 3:31 PM CDTMarine Dense Fog AdvisoryDLH24 hr
Jul 8, 3:37 PM CDTDense Fog AdvisoryDLHCarlton, Cook, Lake, Saint Louis20 hr
Jul 7, 7:35 PM CDTSpecial Weather StatementDLHBurnett40 min
Jul 7, 8:47 PM CDTSpecial Weather StatementDLHPrice13 min
Jul 7, 9:00 PM CDTSpecial Weather StatementDLHPrice15 min
Jul 7, 9:17 PM CDTSpecial Weather StatementDLHPrice28 min
Jul 7, 9:48 PM CDTSpecial Weather StatementDLHPrice42 min
Jul 7, 10:04 PM CDTSpecial Weather StatementDLHIron26 min
Jul 7, 10:17 PM CDTSpecial Weather StatementDLHDouglas43 min
Jul 7, 10:23 PM CDTSpecial Weather StatementDLHIron22 min
Jul 7, 10:46 PM CDTSpecial Weather StatementDLHIron29 min
Jul 7, 11:01 PM CDTSpecial Weather StatementDLHBayfield29 min
Jul 7, 11:19 PM CDTSpecial Weather StatementDLHIron26 min
Jul 7, 11:35 PM CDTSpecial Weather StatementDLHAshland25 min
Jul 7, 11:44 PM CDTSpecial Weather StatementDLHPrice16 min
Jul 7, 11:47 PM CDTSpecial Weather StatementDLHIron13 min
Jul 7, 11:51 PM CDTSpecial Weather StatementDLHSawyer24 min
Jul 8, 12:02 AM CDTSpecial Weather StatementDLHPrice13 min
Jul 8, 12:05 AM CDTSpecial Weather StatementDLHIron25 min
Jul 8, 12:19 AM CDTSpecial Weather StatementDLHPrice11 min
Jul 8, 1:19 AM CDTSpecial Weather StatementDLHPrice26 min
Jul 8, 1:58 AM CDTSpecial Weather StatementDLHPrice17 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.