Alert archive / Minnesota / Tornado Warnings in 1990

Tornado Warning 1, NWS Twin Cities, MN

April 23, 1990Swift County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Apr 23, 1990, 3:19 PM CDT for Swift County, Minnesota. It was in force for 26 min.

The area

The counties it named.

The facts

Issued
Apr 23, 1990, 3:19 PM CDT (20:19 UTC)
Expired
Apr 23, 1990, 3:45 PM CDT
In force
26 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Swift 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, 8.3 hours before the alert went out and 170 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 1990-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 114 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 12:00Z on 1990-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 149 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
114 J/kg
Mixed-layer CIN
-246 J/kg
Mixed-layer LCL
1060 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
149 m²/s²
0-3 km storm-relative helicity
83 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 23, 4:06 PM CDTSevere Thunderstorm WarningMPXPope, Stearns, Todd39 min
Apr 23, 5:49 PM CDTSevere Thunderstorm WarningMPXMorrison41 min

Nearby

Tornado Warnings in Minnesota, 1990Every tornado warning in 1990Tornadoes in 1990

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.