Alert archive / Minnesota / Tornado Warnings in 1991

Tornado Warning 7, NWS Duluth, MN

July 5, 1991Aitkin County, Kanabec County, Minnesota

NWS Duluth, MN issued this tornado warning at Jul 5, 1991, 8:35 PM CDT for Aitkin County, Kanabec County, Minnesota. It was in force for 55 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
Jul 5, 1991, 8:35 PM CDT (01:35 UTC)
Expired
Jul 5, 1991, 9:30 PM CDT
In force
55 min
Issued by
NWS Duluth, MN
Area
Whole counties

Counties Aitkin County, MN, Kanabec County, MN

What was reported inside it

TimeReportWhereRemark
Jul 5, 9:05 PM CDTThunderstorm Wind 0Kanabec, MN
Jul 5, 9:20 PM CDTTornado F1Kanabec, 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

International Fa, MN (KINL), launched 00:00Z, 1.6 hours before the alert went out and 255 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, International Fa, MN at 00:00Z on 1991-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 785 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, International Fa, MN at 00:00Z on 1991-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 254 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
785 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
734 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
254 m²/s²
0-3 km storm-relative helicity
319 m²/s²
Significant tornado parameter
1.1
Supercell composite
6.1

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
Jul 5, 7:29 PM CDTTornado WarningDLHCass, Crow Wing46 min
Jul 5, 8:05 PM CDTSevere Thunderstorm WarningDLHAitkin55 min
Jul 5, 8:12 PM CDTTornado WarningDLHSaint Louis33 min
Jul 5, 8:19 PM CDTSevere Thunderstorm WarningDLHSaint Louis56 min
Jul 5, 9:02 PM CDTTornado WarningDLHPine58 min
Jul 5, 9:36 PM CDTTornado WarningDLHBurnett69 min
Jul 5, 10:44 PM CDTSevere Thunderstorm WarningDLHBurnett, Washburn46 min
Jul 5, 11:22 PM CDTSevere Thunderstorm WarningDLHSawyer68 min
Jul 6, 3:21 AM CDTSevere Thunderstorm WarningDLHOneida54 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.