Alert archive / Montana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 9, NWS Glasgow, MT

June 23, 1998Dawson County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jun 23, 1998, 6:40 PM MDT for Dawson County, Montana. It was in force for 60 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: Jun 23, 1998, 6:40 PM MDT (00:40 UTC)
Expired: Jun 23, 1998, 7:40 PM MDT
In force: 60 min
Issued by: NWS Glasgow, MT
Area: Whole counties

County Dawson County, MT

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 0.7 hours before the alert went out and 166 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 650 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1747 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Glasgow, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 23, 2:38 PM MDT, 4 hours 2 minutes earlier.

Area forecast discussion, Jun 23, 2:38 PM MDT, 4 hours 2 minutes before

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The office that day

Everything else NWS Glasgow, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 23, 6:23 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt	62 min
Jun 23, 6:27 PM MDT	Severe Thunderstorm Warning	GGW	Daniels	63 min
Jun 23, 6:47 PM MDT	Severe Thunderstorm Warning	GGW	Richland	63 min
Jun 23, 7:35 PM MDT	Severe Thunderstorm Warning	GGW	Valley	60 min
Jun 23, 7:50 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt	60 min
Jun 23, 8:51 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt	64 min
Jun 23, 9:15 PM MDT	Flash Flood Warning	GGW	Roosevelt	115 min

Nearby

Severe Thunderstorm Warnings in Montana, 1998 Every 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.