Alert archive / Montana / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 5, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jun 20, 1994, 7:48 PM MDT for Powell County, Montana. It was in force for 42 min.
The area
The counties it named.
The facts
- Issued
- Jun 20, 1994, 7:48 PM MDT (01:48 UTC)
- Expired
- Jun 20, 1994, 8:30 PM MDT
- In force
- 42 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Powell County, MT
The nearest sounding before it
Great Falls, MT (KGTF), launched 00:00Z, 1.8 hours before the alert went out and 142 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
- 2465 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 1801 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 8.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS1 KHLN 210148
SVRTFX
MTC077-210230-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HELENA MT
748 PM MDT MON JUN 20 1994
THE NATIONAL WEATHER SERVICE IN HELENA MT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 830 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
IN SOUTHWEST MONTANA
...EASTERN POWELL COUNTY
AT 745 PM MDT RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES NORTHEAST
OF THE TOWN OF DEER LODGE IN EASTERN POWELL COUNTY. THE STORM WAS
MOVING NORTHEAST AT 25 MPH, AND SHOULD PASS THROUGH THE TOWN OF
ELLISTON AND THE MACDONALD PASS AREA BY 815 PM.
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
ST. JEAN
x| WUUS
U6WWUS
<b6`WWUS
Bq`WWUS&
q6WWUS
u 6WWUS|
8e6WWUS4
.
VSBY..10-15Z)FPUS
KN V3-5F.../ #FXUS
t 30 XWOUS
VQ6WWUSB
hTWEB 210BHM- ALL HGGL XtWWUS
TL VSZ&6WWUS
$G>6WWUS
H6WWUS
ZF6WWUS*
\0What forecasters said that day
The local office's own words before this severe thunderstorm 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 20, 6:38 PM MDT, 1 hour 10 minutes before
MTZ002-210300- SPECIAL WEATHER STATEMENT AND RADAR NARRATIVE SUMMARY NATIONAL WEATHER SERVICE MISSOULA MT 645 PM MDT MON JUN 20 1994 ...STRONG THUNDERSTORMS WERE DEVELOPING OVER SOUTHWEST MONTANA... SCATTERED THUNDERSTORMS WERE DEVELOPING OVER SOUTHWEST MONTANA EARLY THIS EVENING. THE LATEST RADAR AND LIGHTNING DETECTION EQUIPMENT INDICATED THESE THUNDERSTORMS TO EXTENDED FROM THE TOWN OF HAMILTON MONTANA EAST TO CARBON COUNTY MONTANA, 70 MILES SOUTHWEST OF THE CITY OF BILLINGS MONTANA. THE STRONGEST STORMS WERE LOCATED OVER RAVALLI COUNTY SOUTH OF MISSOULA AND WERE MOVING TOWARD THE MISSOULA AREA. THESE STORMS WILL BE AFFECTING MISSOULA WITHIN THE NEXT HOUR. IT WILL CONTAIN STRONG GUSTY WINDS, BRIEF HEAVY RAIN, AND DANGEROUS LIGHTNING. PLEASE GO TO A PLACE OF SAFETY IF YOU SEE THREATENING WEATHER AND STAY TUNED TO THIS SOURCE FOR FURTHER STATEMENTS REGARDING THESE STORMS. END
Special weather statement, Jun 20, 6:45 PM MDT, 1 hour 3 minutes before
MTZ002-210300- SPECIAL WEATHER STATEMENT AND RADAR NARRATIVE SUMMARY NATIONAL WEATHER SERVICE MISSOULA MT 645 PM MDT MON JUN 20 1994 ...STRONG THUNDERSTORMS WERE DEVELOPING OVER SOUTHWEST MONTANA... SCATTERED THUNDERSTORMS WERE DEVELOPING OVER SOUTHWEST MONTANA EARLY THIS EVENING. THE LATEST RADAR AND LIGHTNING DETECTION EQUIPMENT INDICATED THESE THUNDERSTORMS TO EXTENDED FROM THE TOWN OF HAMILTON MONTANA EAST TO CARBON COUNTY MONTANA, 70 MILES SOUTHWEST OF THE CITY OF BILLINGS MONTANA. THE STRONGEST STORMS WERE LOCATED OVER RAVALLI COUNTY SOUTH OF MISSOULA AND WERE MOVING TOWARD THE MISSOULA AREA. THESE STORMS WILL BE AFFECTING MISSOULA WITHIN THE NEXT HOUR. IT WILL CONTAIN STRONG GUSTY WINDS, BRIEF HEAVY RAIN, AND DANGEROUS LIGHTNING. PLEASE GO TO A PLACE OF SAFETY IF YOU SEE THREATENING WEATHER AND STAY TUNED TO THIS SOURCE FOR FURTHER STATEMENTS REGARDING THESE STORMS. END
Nearby
Severe Thunderstorm Warnings in Montana, 1994Every severe thunderstorm warning in 1994
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.