Alert archive / Minnesota / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 15, NWS Grand Forks, ND

July 3, 1993Stevens County, Traverse County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 3, 1993, 9:05 PM CDT for Stevens County, Traverse County, Minnesota. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Jul 3, 1993, 9:05 PM CDT (02:05 UTC)
Expired
Jul 3, 1993, 10:00 PM CDT
In force
55 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

Counties Stevens County, MN, Traverse County, MN

The nearest sounding before it

Aberdeen, SD (KHON), launched 00:00Z, 2.1 hours before the alert went out and 190 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, Aberdeen, SD at 00:00Z on 1993-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4540 joules per kilogram.LCLEL10008507005003002001001 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, Aberdeen, SD at 00:00Z on 1993-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 127 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
4540 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1223 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
127 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
1.9
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
Jul 4, 12:13 AM CDTSevere Thunderstorm WarningFGFDouglas, Otter Tail32 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1993Every severe thunderstorm warning in 1993

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.