Alert archive / Montana / Tornado Warnings in 1990
Tornado Warning 7, NWS Billings, MT
NWS Billings, MT issued this tornado warning at Jul 6, 1990, 10:13 PM MDT for Custer County, Rosebud County, Montana. It was in force for 32 min.
The area
The counties it named.
The facts
- Issued
- Jul 6, 1990, 10:13 PM MDT (04:13 UTC)
- Expired
- Jul 6, 1990, 10:45 PM MDT
- In force
- 32 min
- Issued by
- NWS Billings, MT
- Area
- Whole counties
Counties Custer County, MT, Rosebud 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, 4.2 hours before the alert went out and 223 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
- 352 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 2419 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 156 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KBIL 070413
TORBIL
MTC017-087-070445-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BILLINGS MT
1013 PM MDT FRI JUL 6 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 1045 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE STATE OF MONTANA
SOUTHWEST CUSTER...EAST CENTRAL ROSEBUD
AT 10 05 PM MDT...A TORNADO WAS INDICATED BY RADAR 25 MILES
SOUTHEAST OF FORSYTH IN EAST CENTRAL ROSEBUD COUNTY OF MONTANA AND
WAS MOVING EAST AT 35 MPH.
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE TO BE IS IN
A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...FIND SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS.
IF YOU ARE CAUGHT OUTSIDE...FIND SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...TAKE SHELTER IN A CULVERT...DITCH...
OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
STAY ALERT. IF THREATENING WEATHER IS SIGHTED GO TO A SAFE PLACE
IMMEDIATELY. WHEN IT IS SAFE PLEASE RELAY YOUR REPORT OF SEVERE
WEATHER TO THE NEAREST LAW ENFORCEMNENT AGENCY.
KARRWhat 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, Jul 6, 4:51 PM MDT, 5 hours 22 minutes before
MTZ005-006-007-008-070045- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE BILLINGS MT 445 PM MDT FRI JUL 6 1990 THUNDERSTORMS CONTINUED TO GRUMBLE IN CENTRAL AND NORTH CENTRAL MONTANA. AT 435 PM MDT...THE STRONGEST STORMS WERE 45 MILES NORTH OF WINNETT IN SOUTHERN PHILLIPS COUNTY...45 MILES SOUTHWEST OF JORDAN IN SOUTHWEST GARFIELD COUTY...AND 10 MILES NORTHEAST AND 15 MILES SOUTHWEST OF ROUNDUP IN MUSSELSHELL COUNTY. THE STORM WERE MOVING NORTHEAST AT 30 MPH AND SHOULD PRODUCE HEAVY RAINS...STRONG AND GUSTY WINDS...AND POSSIBLE HAIL. PEOPLE IN SOUTHERN PHILLIPS...GARFIELD AND MUSSELSHELL COUNTIES OF MONTANA SHOULD REMAIN ALERT FOR THESE STORMS UNTIL 6 45 PM MDT. OTHER SHOWERS AND THUNDERSTORMS WERE NOTED IN THE CENTRAL AND NORTH CENTRAL MONTANA COUNTIES OF WHEATLAND...JUDITH BASIN...FERGUS... PETROLEUM...PHILLIPS...GARFIELD...MUSSELSHELL...AND GOLDEN VALLEY. THESE SHOWERS AND THUNDERSTORMS WERE ALSO MOVING NORTHEAST AT 30 MPH. END/KARR
Special weather statement, Jul 6, 4:57 PM MDT, 5 hours 16 minutes before
MTZ005-006-007-008-070045- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTED TYPO NATIONAL WEATHER SERVICE BILLINGS MT 445 PM MDT FRI JUL 6 1990 THUNDERSTORMS CONTINUED TO GRUMBLE IN CENTRAL AND NORTH CENTRAL MONTANA. AT 435 PM MDT...THE STRONGEST STORMS WERE 45 MILES NORTH OF WINNETT IN SOUTHERN PHILLIPS COUNTY...45 MILES SOUTHWEST OF JORDAN IN SOUTHWEST GARFIELD COUNTY...AND 10 MILES NORTHEAST AND 15 MILES SOUTHWEST OF ROUNDUP IN MUSSELSHELL COUNTY. THE STORMS WERE MOVING NORTHEAST AT 30 MPH AND SHOULD PRODUCE HEAVY RAINS...STRONG AND GUSTY WINDS...AND POSSIBLE HAIL. PEOPLE IN SOUTHERN PHILLIPS...GARFIELD AND MUSSELSHELL COUNTIES OF MONTANA SHOULD REMAIN ALERT FOR THESE STORMS UNTIL 6 45 PM MDT. OTHER SHOWERS AND THUNDERSTORMS WERE NOTED IN THE CENTRAL AND NORTH CENTRAL MONTANA COUNTIES OF WHEATLAND...JUDITH BASIN...FERGUS... PETROLEUM...PHILLIPS...GARFIELD...MUSSELSHELL...AND GOLDEN VALLEY. THESE SHOWERS AND THUNDERSTORMS WERE ALSO MOVING NORTHEAST AT 30 MPH. END/KARR
The office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 8:24 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Treasure | 66 min |
| Jul 6, 9:42 PM MDT | Tornado Warning | BYZ | Rosebud | 33 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.