Alert archive / Minnesota / Tornado Warnings in 1992

Tornado Warning 9, NWS Grand Forks, ND

August 20, 1992Polk County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Aug 20, 1992, 5:24 PM CDT for Polk County, Minnesota. It was in force for 66 min.

The area

The counties it named.

The facts

Issued
Aug 20, 1992, 5:24 PM CDT (22:24 UTC)
Expired
Aug 20, 1992, 6:30 PM CDT
In force
66 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Polk County, MN

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 10.4 hours before the alert went out and 343 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, Bismarck Municip, ND at 12:00Z on 1992-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Bismarck Municip, ND at 12:00Z on 1992-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
0 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
198 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 Grand Forks, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 20, 4:46 PM CDTSevere Thunderstorm WarningFGFPennington59 min
Aug 20, 5:27 PM CDTSevere Thunderstorm WarningFGFLake of the Woods63 min
Aug 20, 6:00 PM CDTSevere Thunderstorm WarningFGFClearwater60 min

Nearby

Tornado Warnings in Minnesota, 1992Every tornado warning in 1992Tornadoes in 1992

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.