Alert archive / Montana / Tornado Warnings in 1993

Tornado Warning 2, NWS Great Falls, MT

July 7, 1993Fergus County, Montana

NWS Great Falls, MT issued this tornado warning at Jul 7, 1993, 11:45 AM MDT for Fergus County, Montana. It was in force for 30 min.

The area

The counties it named.

The facts

Issued
Jul 7, 1993, 11:45 AM MDT (17:45 UTC)
Expired
Jul 7, 1993, 12:15 PM MDT
In force
30 min
Issued by
NWS Great Falls, MT
Area
Whole counties

County Fergus County, MT

The nearest sounding before it

Great_falls, MT (KTFX), launched 12:00Z, 5.8 hours before the alert went out and 106 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.

Skew-T log-pSkew-T log-p diagram, Great_falls, MT at 12:00Z on 1993-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 61 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Great_falls, MT at 12:00Z on 1993-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
61 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
957 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
38 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KGTF 071747
TORGTF
MTC027-071815-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
1145 AM MDT WED JUL 7 1993
 
THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1215 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTH CENTRAL MONTANA
 
   ...CENTRAL FERGUS COUNTY
 
FERGUS COUNTY SHERIFF DEPARTMENT REPORTED TORNADO ON THE GROUND AT 11:25
AM AT AIRPORT.
 
 
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.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING.  AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH
OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

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.