Alert archive / North Dakota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 83, NWS Grand Forks, ND

August 24, 1991LaMoure County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 24, 1991, 7:27 PM CDT for LaMoure County, North Dakota. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Aug 24, 1991, 7:27 PM CDT (00:27 UTC)
Expired
Aug 24, 1991, 8:30 PM CDT
In force
63 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County LaMoure County, ND

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 0.5 hours before the alert went out and 423 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 1991-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2335 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 1991-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 106 square meters per square second.1939Sfc1 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
2335 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
1192 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
183 m²/s²
Significant tornado parameter
1.6
Supercell composite
12.9

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 25, 1:02 AM CDTSevere Thunderstorm WarningFGFClay58 min
Aug 24, 10:48 PM CDTSevere Thunderstorm WarningFGFRansom, Richland57 min
Aug 24, 11:57 PM CDTSevere Thunderstorm WarningFGFCass, Richland63 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1991Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive.