Alert archive / Minnesota / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 49, NWS Duluth, MN

June 30, 2026Cook County, Lake County, Saint Louis County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jun 30, 2026, 1:10 AM CDT for Cook County, Lake County, Saint Louis County, Minnesota. It was in force for 65 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: Jun 30, 2026, 1:10 AM CDT (06:10 UTC)
Expired: Jun 30, 2026, 2:15 AM CDT
In force: 65 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cook County, MN, Lake County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 106 km from the middle of the area, began a volume at 06:11 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.

Issued	Product	Office	Lasted
Jun 29, 7:48 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 6.2 hours before the alert went out and 171 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 22 J/kg
Mixed-layer CIN: -616 J/kg
Mixed-layer LCL: 1314 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: -18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Duluth, MN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 29, 6:46 PM CDT, 6 hours 24 minutes earlier.

Area forecast discussion, Jun 29, 6:46 PM CDT, 6 hours 24 minutes before

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Hazardous weather outlook, Jun 29, 4:44 PM CDT, 8 hours 26 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 10:25 PM CDT	Special Marine Warning	DLH		22 min
Jun 29, 10:32 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DLH	Cass, Crow Wing	58 min
Jun 29, 10:52 PM CDT	Tornado Warning	DLH	Cass, Crow Wing	38 min
Jun 29, 11:08 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DLH	Aitkin, Cass, Crow Wing	67 min
Jun 29, 11:31 PM CDT	Areal Flood Advisory	DLH	Crow Wing	3 hr
Jun 29, 11:41 PM CDT	Severe Thunderstorm Warning Destructive damage threat	DLH	Aitkin, Carlton, Itasca, Saint Louis	64 min
Jun 29, 11:44 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	76 min
Jun 30, 12:23 AM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Itasca, Lake, Saint Louis	52 min
Jun 30, 12:51 AM CDT	Special Marine Warning	DLH		54 min
Jun 30, 1:14 AM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Lake, Saint Louis	61 min
Jun 30, 1:20 AM CDT	Special Marine Warning	DLH		55 min
Jun 30, 1:40 AM CDT	Special Marine Warning	DLH		31 min
Jun 30, 11:16 AM CDT	Marine Dense Fog Advisory	DLH		22 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2026 Every severe thunderstorm warning in 2026

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.