Alert archive / Minnesota / Tornado Warnings in 1988

Tornado Warning 1, NWS Duluth, MN

July 31, 1988Saint Louis County, Minnesota

NWS Duluth, MN issued this tornado warning at Jul 31, 1988, 9:09 AM CDT for Saint Louis County, Minnesota. It was in force for 36 min.

The area

The counties it named.

The facts

Issued
Jul 31, 1988, 9:09 AM CDT (14:09 UTC)
Expired
Jul 31, 1988, 9:45 AM CDT
In force
36 min
Issued by
NWS Duluth, MN
Area
Whole counties

County Saint Louis County, MN

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 2.2 hours before the alert went out and 317 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 12:00Z on 1988-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 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 12:00Z on 1988-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.193958Sfc1 km3 km6 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1549 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
802 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.7

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 31, 4:26 AM CDTSevere Thunderstorm WarningDLHCass64 min
Jul 31, 8:51 AM CDTSevere Thunderstorm WarningDLHCarlton, Pine69 min

Nearby

Tornado Warnings in Minnesota, 1988Every tornado warning in 1988Tornadoes in 1988

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.