Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 83, NWS Twin Cities, MN

July 4, 1986Morrison County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 4, 1986, 7:00 AM CDT for Morrison County, Minnesota. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Jul 4, 1986, 7:00 AM CDT (12:00 UTC)
Expired
Jul 4, 1986, 8:00 AM CDT
In force
60 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Morrison 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, 0.0 hours before the alert went out and 139 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 1986-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 601 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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 1986-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 206 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
601 J/kg
Mixed-layer CIN
-423 J/kg
Mixed-layer LCL
823 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
206 m²/s²
0-3 km storm-relative helicity
249 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.1

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 4, 2:05 AM CDTSevere Thunderstorm WarningMPXMille Lacs, Morrison30 min
Jul 4, 3:08 AM CDTSevere Thunderstorm WarningMPXChisago52 min
Jul 4, 6:30 AM CDTSevere Thunderstorm WarningMPXTodd45 min
Jul 4, 7:30 AM CDTSevere Thunderstorm WarningMPXMille Lacs, Morrison60 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.