Alert archive / Montana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 65, NWS Billings, MT

July 6, 1998Carter County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 6, 1998, 3:56 PM MDT for Carter County, Montana. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 6, 1998, 3:56 PM MDT (21:56 UTC)
Expired
Jul 6, 1998, 4:45 PM MDT
In force
49 min
Issued by
NWS Billings, MT
Area
Whole counties

County Carter County, MT

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 9.9 hours before the alert went out and 327 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, Bismarck Municip, ND at 12:00Z on 1998-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 16 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, Bismarck Municip, ND at 12:00Z on 1998-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -146 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
16 J/kg
Mixed-layer CIN
-306 J/kg
Mixed-layer LCL
1386 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
-146 m²/s²
0-3 km storm-relative helicity
34 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

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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 Billings, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 5, 6:19 PM MDTSevere Thunderstorm WarningBYZBig Horn61 min
Jul 5, 6:35 PM MDTSevere Thunderstorm WarningBYZCarbon, Yellowstone60 min
Jul 5, 7:16 PM MDTSevere Thunderstorm WarningBYZBig Horn, Yellowstone64 min
Jul 5, 7:19 PM MDTSevere Thunderstorm WarningBYZYellowstone61 min
Jul 5, 7:30 PM MDTSevere Thunderstorm WarningBYZPowder River65 min
Jul 5, 7:50 PM MDTSevere Thunderstorm WarningBYZBig Horn, Treasure, Yellowstone65 min
Jul 5, 8:29 PM MDTSevere Thunderstorm WarningBYZBig Horn61 min
Jul 5, 8:55 PM MDTSevere Thunderstorm WarningBYZRosebud, Treasure60 min
Jul 5, 9:30 PM MDTSevere Thunderstorm WarningBYZBig Horn65 min
Jul 5, 9:52 PM MDTSevere Thunderstorm WarningBYZCuster, Rosebud63 min
Jul 6, 5:16 PM MDTSevere Thunderstorm WarningBYZCuster, Fallon64 min

Nearby

Severe Thunderstorm Warnings in Montana, 1998Every severe thunderstorm warning in 1998

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.