Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 99, NWS Twin Cities, MN

July 15, 1986Lac qui Parle County, Yellow Medicine County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 15, 1986, 8:33 AM CDT for Lac qui Parle County, Yellow Medicine County, Minnesota. It was in force for 57 min.

The area

The counties it named.

The facts

Issued
Jul 15, 1986, 8:33 AM CDT (13:33 UTC)
Expired
Jul 15, 1986, 9:30 AM CDT
In force
57 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Lac qui Parle County, MN, Yellow Medicine 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

Aberdeen, SD (KHON), launched 12:00Z, 1.6 hours before the alert went out and 188 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 12:00Z on 1986-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3436 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, Aberdeen, SD at 12:00Z on 1986-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 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
3436 J/kg
Mixed-layer CIN
-109 J/kg
Mixed-layer LCL
839 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.8
Supercell composite
6.0

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
Jul 15, 9:17 AM CDTSevere Thunderstorm WarningMPXRedwood, Renville43 min
Jul 15, 10:35 AM CDTSevere Thunderstorm WarningMPXMcLeod, Sibley55 min
Jul 15, 10:46 AM CDTSevere Thunderstorm WarningMPXLe Sueur, Nicollet49 min
Jul 15, 11:47 AM CDTSevere Thunderstorm WarningMPXFaribault, Martin53 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1986Every severe thunderstorm warning in 1986

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.