Alert archive / Montana / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 13, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jun 15, 1993, 6:56 PM MDT for Jefferson County, Lewis and Clark County, Montana. It was in force for 49 min.
The area
The counties it named.
The facts
- Issued
- Jun 15, 1993, 6:56 PM MDT (00:56 UTC)
- Expired
- Jun 15, 1993, 7:45 PM MDT
- In force
- 49 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
The nearest sounding before it
Great Falls, MT (KGTF), launched 00:00Z, 0.9 hours before the alert went out and 118 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
- 94 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1065 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 110 m²/s²
- 0-3 km storm-relative helicity
- 165 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS1 KHLN 160055 SVRTFX MTC043-049-160145- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HELENA MT 656 PM MDT TUE JUN 15 1993 THE NATIONAL WEATHER SERVICE IN HELENA MT HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 745 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWEST MONTANA ...NORTHWESTERN JEFFERSON COUNTY...LEWIS AND CLARK COUNTY A THUNDERSTORM THAT HAS PRODUCED SMALL HAIL AND STRONG WINDS IS MOVING TOWARDS LEWIS AND CLARK COUNTY AND IS GETTING STRONGER. THIS IS PRODUCING MANY DANGEROUS LIGHTNING STROKES AS WELL. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. &
What 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 15, 3:46 PM MDT, 3 hours 10 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MISSOULA, MT 345 PM MDT TUE JUN 15 1993 AT 330 PM MDT MISSOULA WEATHER RADAR INDICATED STRONG THUNDERSTORMS OVER THE IDAHO PANHANDLE AND WESTERN MONTANA. THE STRONGEST THUNDERSTORM IN IDAHO WAS LOCATED IN SOUTHEAST IDAHO COUNTY AND LIKELY CONTAINS HEAVY RAIN AND SMALL HAIL. THE STRONGEST THUNDER- STORMS IN MONTANA WERE LOCATED JUST SOUTHEAST OF KALISPELL...SOUTHEAST OF GREAT FALLS...AND ABOUT 30 MILES SOUTH OF BUTTE. THESE ALSO PROBABLY CONTAIN HEAVY RAIN AND SMALL HAIL AND/OR STRONG GUSTY WINDS. THESE THUNDERSTORMS ARE PART OF A LARGE AREA OF SHOWERS THAT COVERS ALL OF IDAHO AND THE WESTERN HALF OF MONTANA. MOVEMENT ORF THESE SHOWERS AND THUNDERSTORMS IS TO THE NORTHEAST AT 20 MPH. END/MAR
Special weather statement, Jun 15, 4:45 PM MDT, 2 hours 11 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTION NATIONAL WEATHER SERVICE MISSOULA, MT 445 PM MDT TUE JUN 15 1993 AT 4:25 PM MDT MISSOULA WEATHER RADAR SHOWED A LARGE AREA OF SCATTERED RAIN SHOWERS AND THUNDERSHOWERS WITHIN A 200 MILE RADIUS OF MISSOULA. THE STRONGEST THUNDERSTORMS WERE TO BE ALONG THE IDAHO...MONTANA BORDERS NEAR SALMON IDAHO AND EXTENDING INTO SOUTHWEST MONTANA TO THE EAST OF BUTTE. ALL ACTIVITY WAS MOVING TO THE NORTHEAST AT 20 TO 25 MPH. RADAR STORM STRUCTURE SUGGEST THESE STORMS ARE ACCOMPANIED BY LIGHTNING... HEAVY RAIN AND SMALL HAIL. END
Special weather statement, Jun 15, 4:53 PM MDT, 2 hours 3 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MISSOULA, MT 445 PM MDT TUE JUN 15 1993 AT 4:25 PM MDT MISSOULA WEATHER RADAR SHOWED A LARGE AREA OF SCATTERED RAIN SHOWERS AND THUNDERSHOWERS WITHIN A 200 MILE RADIUS OF MISSOULA. THE STRONGEST THUNDERSTORMS APPEARED TO BE ALONG THE IDAHO...MONTANA BORDERS NEAR SALMON IDAHO AND EXTENDING INTO SOUTHWEST MONTANA TO THE EAST OF BUTTE. ALL ACTIVITY WAS MOVING TO THE NORTHEAST AT 20 TO 25 MPH. RADAR STORM STRUCTURE SUGGEST THESE STORMS ARE ACCOMPANIED BY LIGHTNING... HEAVY RAIN AND SMALL HAIL. END
Special weather statement, Jun 15, 4:56 PM MDT, 2 hours before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTION NATIONAL WEATHER SERVICE MISSOULA, MT 445 PM MDT TUE JUN 15 1993 AT 4:25 PM MDT MISSOULA WEATHER RADAR SHOWED A LARGE AREA OF SCATTERED RAIN SHOWERS AND THUNDERSHOWERS WITHIN A 200 MILE RADIUS OF MISSOULA. THE STRONGEST THUNDERSTORMS WERE TO BE ALONG THE IDAHO...MONTANA BORDERS NEAR SALMON IDAHO AND EXTENDING INTO SOUTHWEST MONTANA TO THE EAST OF BUTTE. ALL ACTIVITY WAS MOVING TO THE NORTHEAST AT 20 TO 25 MPH. RADAR STORM STRUCTURE SUGGEST THESE STORMS ARE ACCOMPANIED BY LIGHTNING... HEAVY RAIN AND SMALL HAIL. END
Special weather statement, Jun 15, 5:45 PM MDT, 1 hour 11 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MISSOULA, MT 545 PM MDT TUE JUN 15 1993 AT 5:25 PM MDT MISSOULA WEATHER RADAR SHOWED A LARGE AREA OF SCATTERED RAIN SHOWERS AND THUNDERSTORMS WITHIN A 200 MILE RADIUS OF MISSOULA. THE STRONGEST THUNDERSTORMS WERE IN SOUTHERN RAVALLI COUNTY MOVING INTO SOUTHERN GRANITE COUNTY OF MONTANA WEST OF THE DIVIDE. MORE STRONG THUNDERSTORMS WERE IN SOUTHERN LEWIS AND CLARK COUNNTY TO THE NORTH OF HELENA. ALL ACTIVITY WAS MOVING NORTHEAST AT 20 TO 25 MPH. RADAR INDICATES THAT THESE STORMS WERE PRODUCING HEAVY RAINFALL...STRONG GUSTY WINDS AND SMALL HAIL. IF SEVERE WEATHER IS NOTED FROM THESE STORMS...CALL YOUR NEAREST LAW ENFORCEMENT AGENCY OR THE NATIONAL WEATHER SERVICE. END
Special weather statement, Jun 15, 5:57 PM MDT, 59 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MISSOULA, MT 545 PM MDT TUE JUN 15 1993 AT 5:25 PM MDT MISSOULA WEATHER RADAR SHOWED A LARGE AREA OF SCATTERED RAIN SHOWERS AND THUNDERSTORMS WITHIN A 200 MILE RADIUS OF MISSOULA. THE STRONGEST THUNDERSTORMS WERE IN SOUTHERN RAVALLI COUNTY MOVING INTO SOUTHERN GRANITE COUNTY OF MONTANA WEST OF THE DIVIDE. MORE STRONG THUNDERSTORMS WERE IN SOUTHERN LEWIS AND CLARK COUNNTY TO THE NORTH OF HELENA. ALL ACTIVITY WAS MOVING NORTHEAST AT 20 TO 25 MPH. RADAR INDICATES THAT THESE STORMS WERE PRODUCING HEAVY RAINFALL...STRONG GUSTY WINDS AND SMALL HAIL. IF SEVERE WEATHER IS NOTED FROM THESE STORMS...CALL YOUR NEAREST LAW ENFORCEMENT AGENCY OR THE NATIONAL WEATHER SERVICE. END
Nearby
Severe Thunderstorm Warnings in Montana, 1993Every severe thunderstorm warning 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.