Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 31, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 28, 1997, 6:30 PM MDT for Cascade County, Montana. It was in force for 60 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 28, 1997, 6:30 PM MDT (00:30 UTC)
- Expired
- Jun 28, 1997, 7:30 PM MDT
- In force
- 60 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
County Cascade County, MT
The radar
The Great Falls radar (KTFX), 17 km from the middle of the area, began a volume at 00:33 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 28, 6:52 PM MDT | Hail 0.75 | Great Falls, MT | |
| Jun 28, 7:06 PM MDT | Hail 1.25 | Great Falls, MT |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 0.5 hours before the alert went out and 59 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
- 568 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 2249 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KGTF 290030 RRA
SVRGTF
MTC013-290130-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
630 PM MDT SAT JUN 28 1997
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 730 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE NORTH CENTRAL PART OF MONTANA
CASCADE
SEVERE THUNDERSTORMS OVER THE TOWN OF CASCADE WITH 1 AND 1/4 INCH
HAIL REPORTEDx AT 615 OM MDT. THE THUNDERSTORM IS MOVING TOWARDS
THE NORTHEAST AT 20 MPH. SEVERAL THUNDERSTORMS AFE DEVELOPING AND
SHOULD REACH THE COMMUNITIES OF SIMMS...GREAT FALLS AND SURROUNDING
AREAS BY 730 PM MDT.The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 7:30 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 45 min |
| Jun 28, 8:20 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 55 min |
| Jun 28, 8:36 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 54 min |
| Jun 29, 2:53 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 67 min |
| Jun 29, 3:30 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Meagher | 60 min |
| Jun 29, 4:39 PM MDT | Tornado Warning | TFX | Judith Basin | 36 min |
| Jun 29, 5:18 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 57 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.