Alert archive / Montana / Tornado Watches in 1997
Tornado Watch 542
The Storm Prediction Center issued this tornado watch at Jun 29, 1997, 7:15 PM MDT for 17 counties in Montana. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 29, 1997, 7:15 PM MDT (01:15 UTC)
- Expired
- Jun 30, 1997, 1:00 AM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
Counties Carter County, MT, Custer County, MT, Daniels County, MT, Dawson County, MT, Fallon County, MT, Garfield County, MT, McCone County, MT, Phillips County, MT, Powder River County, MT, Prairie County, MT, Richland County, MT, Roosevelt County, MT, Rosebud County, MT, Sheridan County, MT, Treasure County, MT, Valley County, MT, Wibaux County, MT
The radar
The Glasgow radar (KGGW), 102 km from the middle of the area, began a volume at 01:17 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.
Warnings issued inside it
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 7:18 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 57 min |
| Jun 29, 7:40 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River | 60 min |
| Jun 29, 7:52 PM MDT | Tornado Warning | BYZ | Custer, Rosebud | 48 min |
| Jun 29, 8:11 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River | 59 min |
| Jun 29, 8:14 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 61 min |
| Jun 29, 9:08 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer, Fallon | 62 min |
| Jun 29, 11:00 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 60 min |
| Jun 29, 11:24 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 61 min |
| Jun 29, 11:55 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 60 min |
| Jun 30, 12:56 AM MDT | Severe Thunderstorm Warning | BYZ | Carter | 44 min |
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 1.3 hours before the alert went out and 102 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
- 552 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 2316 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 171 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.9
The text
As transmitted, in the capitals the NWS used until 2016.
954 WWUS9 KMKC 300034 SEL2 MKC WW 300034 MTZ000-300700- BULLETIN - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 542 STORM PREDICTION CENTER NORMAN OK 634 PM MDT SUN JUN 29 1997 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF EASTERN MONTANA EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 715 PM UNTIL 100 AM MDT. TORNADOES...HAIL TO 2 1/4 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 90 STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH OF GLASGOW MONTANA TO 10 MILES SOUTH SOUTHEAST OF BROADUS MONTANA. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO WATCH NUMBER 538. WATCH NUMBER 538 WILL NOT BE IN EFFECT AFTER 715 PM MDT. CONTINUE...WW 539...WW 540...WW 541... DISCUSSION...INTENSE THUNDERSTORMS...SOME EXHIBITING SUPERCELL CHARACTERISITICS CONTINUE MOVING NE ACROSS MONTANA. SEVERE THREAT SHOULD INCREASE ACROSS PORTIONS OF EASTERN MONTANA DURING THE EVENING AS SHORTWAVE CROSSES THE AREA. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 1/4 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 25030. ...VESCIO 490,1043 451,1032 451,1071 490,1083
Nearby
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.