Alert archive / Minnesota / Red Flag Warnings in 2026

Red Flag Warning 2, NWS Duluth, MN

April 16, 2026Cass County, Minnesota

NWS Duluth, MN issued this red flag warning at Apr 16, 2026, 10:34 AM CDT for Cass County, Minnesota. It took effect at Apr 16, 2026, 2:00 PM CDT. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 16, 2026, 10:34 AM CDT (15:34 UTC)
In effect from: Apr 16, 2026, 2:00 PM CDT
Expired: Apr 16, 2026, 8:00 PM CDT
In force: 6 hr
Issued by: NWS Duluth, MN

County Cass County, MN

The radar

The Duluth radar (KDLH), 161 km from the middle of the area, began a volume at 15:35 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 12:00Z, 3.6 hours before the alert went out and 240 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1800 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 47 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 red flag 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 red flag warning went out at Apr 16, 6:07 AM CDT, 4 hours 27 minutes earlier.

Area forecast discussion, Apr 16, 6:07 AM CDT, 4 hours 27 minutes before

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Hazardous weather outlook, Apr 16, 3:57 AM CDT, 6 hours 37 minutes before

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In the hours before

Special weather statement, Apr 16, 6:25 AM CDT, 4 hours 9 minutes before

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Nearby

Red Flag Warnings in Minnesota, 2026 Every red flag 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.