Alert archive / Montana / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 18, NWS Missoula, MT

June 26, 1993Lewis and Clark County, Powell County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Jun 26, 1993, 6:59 PM MDT for Lewis and Clark County, Powell County, Montana. It was in force for 46 min.

The area

The counties it named.

The facts

Issued
Jun 26, 1993, 6:59 PM MDT (00:59 UTC)
Expired
Jun 26, 1993, 7:45 PM MDT
In force
46 min
Issued by
NWS Missoula, MT
Area
Whole counties

Counties Lewis and Clark County, MT, Powell County, MT

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 1.0 hours before the alert went out and 292 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, Spokane, WA at 00:00Z on 1993-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 454 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, Spokane, WA at 00:00Z on 1993-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
454 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
2715 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

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 Missoula, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 26, 9:12 PM MDTSevere Thunderstorm WarningMSOMineral48 min
Jun 26, 9:19 PM MDTSevere Thunderstorm WarningMSOMineral, Sanders41 min
Jun 26, 10:11 PM MDTSevere Thunderstorm WarningMSOLake, Missoula, Sanders49 min
Jun 26, 10:32 PM MDTSevere Thunderstorm WarningMSOFlathead43 min

Nearby

Severe Thunderstorm Warnings in Montana, 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.