Alert archive / Montana / Tornado Warnings in 1993
Tornado Warning 3, NWS Great Falls, MT
NWS Great Falls, MT issued this tornado warning at Jul 11, 1993, 7:24 PM MDT for Chouteau County, Montana. It was in force for 56 min.
The area
The counties it named.
The facts
- Issued
- Jul 11, 1993, 7:24 PM MDT (01:24 UTC)
- Expired
- Jul 11, 1993, 8:20 PM MDT
- In force
- 56 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
County Chouteau County, MT
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 1.4 hours before the alert went out and 48 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
- 144 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 1846 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 258 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KGTF 120129 TORGTF MTC015-120230- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 724 PM MDT SUN JUL 11 1993 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 830 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH CENTRAL MONTANA ...WEST CENTRAL CHOUTEAU COUNTY INCLUDING THE TOWN OF FORT BENTON... AT 723 PM MDT RADAR INDICATED A POSSIBLE TORNADO ABOUT 10 MILES SOUTHWEST OF FORT BENTON. THE STORM IS MOVING SOUTHEAST 5 TO 10 MPH. IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS... OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS.
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, Jul 11, 4:45 PM MDT, 2 hours 39 minutes before
MTZ003-120400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 445 PM MDT SUN JUL 11 1993 ...THUNDERSTORMS DEVELOPING OVER THE NORTHWEST CHINOOK ZONE... LATE THIS AFTERNOON RADAR AND SATELLITE PICTURES INDICATED SEVERAL THUNDERSTORMS BREAKING ACROSS THE PLAINS JUST EAST OF THE NORTHERN ROCKIES. AT 445 PM ONE STORM WAS LOCATED BETWEEN BROWNING AND CUTBANK ...A SECOND THUNDERSTORM WAS SEEN JUST SOUTHWEST OF CONRAD...AND A THIRD STORM WAS SOUTH OF CHOTEAU. THESE THUNDERSTORMS WERE MOVING GENERALLY EASTWARD ABOUT 15 MPH. BEFORE 4 PM A BROWNING OBSERVER REPORTED SMALL HAIL AND HEAVY RAIN. RADAR INDICATES THESE STORMS CAPABLE OF STONG WINDS...HAIL AND HEAVY RAIN. AN UPPER LEVEL LOW PRESSURE CENTER OVER NORTHWEST WASHINGTON WAS STEERING MOIST UNSTABLE AIR FROM THE SOUTHWEST INTO WESTERN MONTANA LATE TODAY AND FURTHER THUNDERSTORM DEVELOPMENT IS EXPECTED OVER WESTERN MONTANA...WITH A FEW STORMS MOVING EASTWARD ACROSS THE STATE OVERNIGHT. ANY SEVERE WEATHER REPORTS SHOULD BE RELAYED TO THE NATIONAL WEATHER SERVICE IN GREAT FALLS AT 453-2081...OR TO THE NEAREST LAW ENFORCEMENT AGENCY. RH NNNN
Special weather statement, Jul 11, 4:51 PM MDT, 2 hours 33 minutes before
MTZ003-120400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 445 PM MDT SUN JUL 11 1993 ...THUNDERSTORMS DEVELOPING OVER THE NORTHWEST CHINOOK ZONE... LATE THIS AFTERNOON RADAR AND SATELLITE PICTURES INDICATED SEVERAL THUNDERSTORMS BREAKING ACROSS THE PLAINS JUST EAST OF THE NORTHERN ROCKIES. AT 445 PM ONE STORM WAS LOCATED BETWEEN BROWNING AND CUTBANK ...A SECOND THUNDERSTORM WAS SEEN JUST SOUTHWEST OF CONRAD...AND A THIRD STORM WAS SOUTH OF CHOTEAU. THESE THUNDERSTORMS WERE MOVING GENERALLY EASTWARD ABOUT 15 MPH. BEFORE 4 PM A BROWNING OBSERVER REPORTED SMALL HAIL AND HEAVY RAIN. RADAR INDICATES THESE STORMS CAPABLE OF STONG WINDS...HAIL AND HEAVY RAIN. AN UPPER LEVEL LOW PRESSURE CENTER OVER NORTHWEST WASHINGTON WAS STEERING MOIST UNSTABLE AIR FROM THE SOUTHWEST INTO WESTERN MONTANA LATE TODAY AND FURTHER THUNDERSTORM DEVELOPMENT IS EXPECTED OVER WESTERN MONTANA...WITH A FEW STORMS MOVING EASTWARD ACRO SS THE STATE OVERNIGHT. ANY SEVERE WEATHER REPORTS SHOULD BE RELAYED TO THE NATIONAL WEATHER SERVICE IN GREAT FALLS AT 453-2081...OR TO THE NEAREST LAW ENFORCEMENT AGENCY. RH NNNN
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 6:25 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 70 min |
| Jul 11, 8:29 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus | 61 min |
| Jul 11, 9:15 PM MDT | Tornado Warning | TFX | Cascade | 60 min |
Nearby
Tornado Warnings in Montana, 1993Every tornado warning in 1993Tornadoes in 1993
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.