Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 48, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Jul 17, 1997, 9:05 PM MDT for Prairie County, Montana. It was in force for 55 min. 1 report 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
- Jul 17, 1997, 9:05 PM MDT (03:05 UTC)
- Expired
- Jul 17, 1997, 10:00 PM MDT
- In force
- 55 min
- Issued by
- NWS Glasgow, MT
- Area
- Whole counties
County Prairie County, MT
The radar
The Glasgow radar (KGGW), 176 km from the middle of the area, began a volume at 03:06 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 |
|---|---|---|---|
| Jul 17, 9:25 PM MDT | Thunderstorm Wind 52 | Terry, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 17, 4:00 PM MDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 3.1 hours before the alert went out and 177 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
- 482 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 2166 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 138 m²/s²
- 0-3 km storm-relative helicity
- 480 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.4
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 Jul 17, 8:41 PM MDT, 24 minutes earlier.
Area forecast discussion, Jul 17, 8:41 PM MDT, 24 minutes before
MTZ016>027-180800- NORTHEAST MONTANA AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GLASGOW MT 835 PM MDT THU JUL 17 1997 LINE OF SEVERE T-STORMS MOVING EAST THROUGH CENTRAL PORTION OF CWA WITH CLEARING BEHIND MAIN LINE AS COOL OUTFLOW STABILIZES AIRMASS. THE SURFACE LOW MOVES INTO THE DKTAS TOMORROW WITH THE EASTERLY FLOW TURNING NRTHLY AROUND NOON BEHIND COLD FRONT FOR SLIGHTLY COOLER TEMPS THROUGH THE PERIOD. SCATTERED T-STORMS ARE IN STORE FOR NE TOMORROW AFTERNOON WITH THE BEST POSSIBILITY OF ACTION IN S MT AHEAD OF UPPER TROUGH MOVING INTO W MT BY FRI PM. S MT WILL ALSO HAVE BETTER HEATING AND MOISTURE. PREVIOUS NUMBERS LOOK GOOD...SO NO CHANGES TO NUMBERS IN STORE IN ZONES. LOCKHART GGW 6232 062/085/060/078 GDV 9233 063/088/064/082
The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 6:20 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 55 min |
| Jul 17, 6:32 PM MDT | Tornado Warning | GGW | Valley | 58 min |
| Jul 17, 7:04 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 56 min |
| Jul 17, 7:17 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 58 min |
| Jul 17, 8:11 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 64 min |
| Jul 17, 8:17 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 58 min |
| Jul 17, 8:33 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 57 min |
| Jul 17, 8:55 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 65 min |
| Jul 17, 9:26 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 64 min |
| Jul 17, 9:39 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland | 66 min |
| Jul 17, 9:48 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 57 min |
| Jul 17, 10:04 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 56 min |
| Jul 17, 10:42 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland | 63 min |
| Jul 17, 11:12 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 48 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.