Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 73, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Aug 28, 1997, 9:40 PM MDT for Fergus County, Montana. It was in force for 50 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 28, 1997, 9:40 PM MDT (03:40 UTC)
- Expired
- Aug 28, 1997, 10:30 PM MDT
- In force
- 50 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
County Fergus County, MT
The radar
The Billings radar (KBLX), 164 km from the middle of the area, began a volume at 03:41 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 28, 8:15 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 3.7 hours before the alert went out and 106 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
- 52 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 3129 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 106 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 290342 RRA SVRGTF MTC027-290430- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 940 PM MDT THU AUG 28 1997 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1030 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN CENTRAL MONTANA ...FERGUS COUNTY AT 935 PM...DOPPLER RADAR INDICATED TWO SEVERE STORMS...ONE IN NORTHEASTERN FERGUS COUNTY AND ANOTHER MOVING ACROSS THE SOUTHERN HALF OF FERGUS COUNTY. BOTH OF THESE STORMS ARE MOVING TO THE NORTHEAST AT 35 TO 40 MPH. THE NORTHERN STORM WILL MOVE INTO SOUTHWESTERN PHILLIPS COUNTY WITHIN THE NEXT HALF HOUR. THE SOUTHERN STORM WILL MOVE JUST SOUTH OF LEWISTOWN IN THE NEXT 15 MINUTES AND INTO FOREST GROVE IN THE NEXT HALF HOUR.
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.
In the hours before
Local storm report, Aug 28, 3:55 PM MDT, 5 hours 45 minutes before
PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE GREAT FALLS MT 350 PM MDT THU AUG 28 1997 TIME(MDT) ......CITY LOCATION...... MT ...EVENT............. DATE(MDT) ......COUNTY LOCATION.... ...REMARKS........... 530 PM WINDAM MT 1.00 INCH HAIL 08/27/97 JUDITH BASIN
Local storm report, Aug 28, 3:56 PM MDT, 5 hours 44 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTION FOR LOCATION NATIONAL WEATHER SERVICE GREAT FALLS MT 356 PM MDT THU AUG 28 1997 TIME(MDT) ......CITY LOCATION...... MT ...EVENT............. DATE(MDT) ......COUNTY LOCATION.... ...REMARKS........... 530 PM WINDHAM MT 1.00 INCH HAIL 08/27/97 JUDITH BASIN
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 6:50 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 40 min |
| Aug 28, 8:06 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin, Meagher | 54 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.