Alert archive / Montana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 97, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Sep 18, 1998, 2:32 PM MDT for Gallatin County, Montana. It was in force for 33 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
- Sep 18, 1998, 2:32 PM MDT (20:32 UTC)
- Expired
- Sep 18, 1998, 3:05 PM MDT
- In force
- 33 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
County Gallatin County, MT
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 8.5 hours before the alert went out and 218 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 859 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
846 WUUS1 KGTF 182033 RRA SVRGTF MTC031-182105- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 232 PM MDT FRI SEP 18 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN GALLATIN COUNTY IN SOUTHWESTERN MONTANA * UNTIL 305 PM MDT * AT 223 PM MDT... DOPPLER RADAR AT GREAT FALLS INDICATED A SEVERE THUNDERSTORM IN THE VICINITY OF BOZEMAN OR IN THE VICINITY OF BELGRADE MOVING NORTHEAST AT 40 MPH. * SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE... BELGRADE AND BOZEMAN.
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 2:49 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 51 min |
| Sep 18, 3:35 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Teton | 50 min |
| Sep 18, 4:37 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Liberty | 38 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.