Alert archive / Montana / Tornado Warnings in 1990
Tornado Warning 1, NWS Glasgow, MT
NWS Glasgow, MT issued this tornado warning at Jun 27, 1990, 8:05 PM MDT for Roosevelt County, Montana. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- Jun 27, 1990, 8:05 PM MDT (02:05 UTC)
- Expired
- Jun 27, 1990, 9:00 PM MDT
- In force
- 55 min
- Issued by
- NWS Glasgow, MT
- Area
- Whole counties
County Roosevelt County, MT
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 2.1 hours before the alert went out and 118 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
- 510 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 2784 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 100 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KGGW 280210
TORGGW
MTC085-280300-
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GLASGOW MT
805 PM MDT WED JUN 27 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE
UNTIL 900 PM MDT FOR PERSONS IN THE FOLLOWING AREAS OF MONTANA.
SOUTHERN ROOSEVELT COUNTY INCLUDING THE CITY OF BOCKTON
AT APPOXIMATELY 8 PM THIS WEDNESDAY EVENING WILLISTON RADAR
INDICATED A TORNADO IN THE VICINITY OF BROCKTON. THIS WAS ALSO
SEEN BY A SPOTTER JUST SOUTH OF BROCKTON.
THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY. IF YOU ARE IN THE
PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF AVAILABLE.
OTHERWISE...GO TO A SMALL INTERhIOR ROOM ON THE LOWEST FLOOR POSSIBLE.
AVOID WINDOWS. ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING
OR GET INTO A DITCH OR CULVERT.What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jun 27, 6:30 PM MDT, 1 hour 35 minutes before
MTZ008-280020- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GLASGOW MT 620 PM MDT WED JUN 27 1990 THE SEVERE THUNDERSTORM WARNING FOR SHERIDAN COUNTY HAS EXPIRED HOWEVER...THE SEVERE THUNDERSTORM WATCH IS STILL IN EFFECT FOR NORTHEAST MONTANA UNTIL 11 PM MDT TONIGHT. WILLISTON RADAR INDICATES THAT THERE ARE STILL VERY STRONG THUNDERSTORMS 20 MILES SOUTHWEST OF PLENTYWOOD. THESE STORMS ARE MOVING TO THE EAST-NORTHEAST AT 25 MILES AN HOUR. BILLINGS RADAR ALSO INDICATES STRONG STORMS IN VALLEY...ROOSEVELT...DANIELS AND SHERIDAN COUNTIES. YOUR NATIONAL WEATHER SERVICE IS CONTINUOUSLY MONITORING THESE STORMS.
Special weather statement, Jun 27, 6:31 PM MDT, 1 hour 34 minutes before
MTZ008-280020- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GLASGOW MT 620 PM MDT WED JUN 27 1990 THE SEVERE THUNDERSTORM WARNING FOR SHERIDAN COUNTY HAS EXPIRED HOWEVER...THE SEVERE THUNDERSTORM WATCH IS STILL IN EFFECT FOR NORTHEAST MONTANA UNTIL 11 PM MDT TONIGHT. WILLISTON RADAR INDICATES THAT THERE ARE STILL VERY STRONG THUNDERSTORMS 20 MILES SOUTHWEST OF PLENTYWOOD. THESE STORMS ARE MOVING TO THE EAST-NORTHEAST AT 25 MILES AN HOUR. BILLINGS RADAR ALSO INDICATES STRONG STORMS IN VALLEY...ROOSEVELT...DANIELS AND SHERIDAN COUNTIES. YOUR NATIONAL WEATHER SERVICE IS CONTINUOUSLY MONITORING THESE STORMS. WALKER
The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 7:35 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 60 min |
| Jun 27, 9:00 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 60 min |
| Jun 27, 9:30 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 30 min |
| Jun 28, 5:15 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 60 min |
Nearby
Tornado Warnings in Montana, 1990Every tornado warning in 1990Tornadoes in 1990
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.