Alert archive / Montana / Tornado Warnings in 1990
Tornado Warning 1, NWS Great Falls, MT
NWS Great Falls, MT issued this tornado warning at May 28, 1990, 4:33 PM MDT for Cascade County, Montana. It was in force for 27 min.
The area
The counties it named.
The facts
- Issued
- May 28, 1990, 4:33 PM MDT (22:33 UTC)
- Expired
- May 28, 1990, 5:00 PM MDT
- In force
- 27 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
County Cascade 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
Great Falls, MT (KGTF), launched 12:00Z, 10.6 hours before the alert went out and 19 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
- 3 J/kg
- Mixed-layer CIN
- -174 J/kg
- Mixed-layer LCL
- 854 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KGTF 282233 TORGTF MTC013-282300- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 433 PM MDT MON MAY 28 1990 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 500 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION...... IN NORTH CENTRAL MONTANA ...NORTHERN CASCADE COUNTY AT 430PM MDT TIME A FUNNEL CLOUD WAS OBSERVED OVER THE CITY OF GREAT FALLS. 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, May 28, 4:09 PM MDT, 24 minutes before
MTZ003-290000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 410 PM MDT MON MAY 28 1990 THUNDERSTORMS WITH HEAVY RAIN HAD DEVELOPED OVER SOUTHERN CASCADE COUNTY AT 4PM MDT. THESE THUNDERSTORMS WERE MOVING ONLY SLOWLY TO THE NORTH AND WILL CAUSE HEAVY RAINS OVER THE GREAT FALLS AREA DURING THE NEXT COUPLE HOURS. SOME FLOODING OF STREETS AND UNDERPASSES MAY OCCUR IN GREAT FALLS AS THE THUNDERSTORMS MOVE SLOWLY NORTHWARD THIS AFTERNOON. IN ADDITION RESIDENTS NEAR THE SMALLER CREEKS AND STREAMS SHOULD WATCH FOR RISING WATER AND POSSIBLE FLOODING IF HEAVY RAINS CONTINUE. END PATERSON
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.