Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 61, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Aug 7, 1997, 6:09 PM MDT for Liberty County, Pondera County, Toole County, Montana. It was in force for 66 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
- Aug 7, 1997, 6:09 PM MDT (00:09 UTC)
- Expired
- Aug 7, 1997, 7:15 PM MDT
- In force
- 66 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
Counties Liberty County, MT, Pondera County, MT, Toole County, MT
The radar
The Great Falls radar (KTFX), 115 km from the middle of the area, began a volume at 00:09 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 0.2 hours before the alert went out and 138 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
- 655 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 2423 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
886 WUUS1 KGTF 080012 RRA SVRGTF MTC073-099-101-051-080115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 609 PM MDT THU AUG 7 1997 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 715 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTH MONTANA ...EASTERN PONDERA COUNTY...EASTERN TETON COUNTY ...SOUTHERN TOOLE COUNTY...SOUTHERN LIBERTY COUNTY AT 605 PM...RADAR INDICATED A SEVERE THUNDERSTORMS 20 MILES NORTHEAST OF CONRAD...10 MILES SOUTHWEST OF CONRAD AND 15 MILES WEST OF CHOTEAU IN CENTRAL TETON COUNTY. THESE STORMS WERE MOVING EAST AT 30 MPH. THE STORM NORTHEAST OF CONRAD WILL AFFECT THE TIBER DAM AREA WITHIN THE NEXT HOUR. THE STORM SOUTHWEST OF CONRAD WILL BE MOVING THROUGH EASTERN PONDERA COUNTY. THE STORM OVER TETON COUNTY WILL BE MOVING THROUGH EASTERN TETON COUNTY OVER THE NEXT HOUR. LARGE HAIL...DAMAGING WIND...STRONG WIND AND DANGEROUS LIGHTNING ARE LIKELY WITH THESE STORMS. &
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 6:09 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 66 min |
| Aug 7, 6:42 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 63 min |
| Aug 7, 6:57 PM MDT | Severe Thunderstorm Warning | TFX | Meagher | 63 min |
| Aug 7, 7:38 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 52 min |
| Aug 7, 9:00 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 60 min |
Nearby
Severe Thunderstorm Warnings in Montana, 1997Every severe thunderstorm warning in 1997
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; radar from the NEXRAD Level II archive.