Alert archive / Minnesota / Tornado Warnings in 1991

Tornado Warning 4, NWS Duluth, MN

June 28, 1991Aitkin County, Kanabec County, Minnesota

NWS Duluth, MN issued this tornado warning at Jun 28, 1991, 9:02 PM CDT for Aitkin County, Kanabec County, Minnesota. It was in force for 58 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jun 28, 1991, 9:02 PM CDT (02:02 UTC)
Expired
Jun 28, 1991, 10:00 PM CDT
In force
58 min
Issued by
NWS Duluth, MN
Area
Whole counties

Counties Aitkin County, MN, Kanabec County, MN

What was reported inside it

TimeReportWhereRemark
Jun 28, 9:15 PM CDTThunderstorm Wind 0Aitkin, MN
Jun 28, 9:30 PM CDTThunderstorm Wind 0Kanabec, MN

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 2.0 hours before the alert went out and 160 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 1991-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3476 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 1991-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 385 square meters per square second.19395878Sfc1 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
3476 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
941 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
385 m²/s²
0-3 km storm-relative helicity
583 m²/s²
Significant tornado parameter
11.6
Supercell composite
41.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 7:26 PM CDTTornado WarningDLHItasca64 min
Jun 28, 7:44 PM CDTSevere Thunderstorm WarningDLHCrow Wing61 min
Jun 28, 8:19 PM CDTTornado WarningDLHAitkin, Crow Wing56 min
Jun 28, 8:30 PM CDTSevere Thunderstorm WarningDLHItasca, Saint Louis60 min
Jun 29, 12:01 AM CDTSevere Thunderstorm WarningDLHAshland, Price, Sawyer59 min
Jun 29, 12:58 AM CDTSevere Thunderstorm WarningDLHOneida, Vilas62 min
Jun 29, 1:52 AM CDTSevere Thunderstorm WarningDLHBayfield68 min

Nearby

Tornado Warnings in Minnesota, 1991Every tornado warning in 1991Tornadoes in 1991

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.