Alert archive / Wisconsin / Tornado Warnings in 2026

Tornado Warning 11, NWS Duluth, MN

July 17, 2026Ashland County, Iron County, Price County, Wisconsin

NWS Duluth, MN issued this tornado warning at Jul 17, 2026, 7:52 PM CDT for Ashland County, Iron County, Price County, Wisconsin. It was in force for 18 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 17, 2026, 7:52 PM CDT (00:52 UTC)
Expired
Jul 17, 2026, 8:10 PM CDT
In force
18 min
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

Counties Ashland County, WI, Iron County, WI, Price County, WI

The radar

The Duluth radar (KDLH), 154 km from the middle of the area, began a volume at 00:51 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.9 hours before the alert went out and 263 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, Green Bay/Straub, WI at 00:00Z on 2026-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1884 joules per kilogram.LCLEL10008507005003002001001 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, Green Bay/Straub, WI at 00:00Z on 2026-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 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
1884 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1453 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
193 m²/s²
Significant tornado parameter
0.7
Supercell composite
15.5

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 7:12 PM CDTSevere Thunderstorm WarningDLHAshland, Iron48 min
Jul 17, 7:27 PM CDTSevere Thunderstorm Warning Considerable damage threatDLHDouglas, Sawyer, Washburn48 min
Jul 17, 7:45 PM CDTSevere Thunderstorm Warning Considerable damage threatDLHAshland, Iron, Price, Sawyer60 min
Jul 17, 8:40 PM CDTSevere Thunderstorm WarningDLHPrice29 min

Nearby

Tornado Warnings in Wisconsin, 2026Every tornado warning in 2026Tornadoes 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.