Alert archive / Montana / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 9, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at May 31, 1993, 7:20 PM MDT for Mineral County, Missoula County, Sanders County, Montana. It was in force for 50 min.
The area
The counties it named.
The facts
- Issued
- May 31, 1993, 7:20 PM MDT (01:20 UTC)
- Expired
- May 31, 1993, 8:10 PM MDT
- In force
- 50 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
Counties Mineral County, MT, Missoula County, MT, Sanders County, MT
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 1.3 hours before the alert went out and 137 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
- 47 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 1403 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 263 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 KMSO 010122 RRA SVRMSO MTC047-061-063-089-010315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 720 PM MDT MON MAY 31 1993 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 915 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATIONS...S... IN WEST CENTRAL MONTANA ...LAKE COUNTY...MINERAL COUNTY...WESTERN MISSOULA COUNTY ...SANDERS COUNTY MISSOULA RADAR AND REPORTS CONTINUE TO INDICATE STRONG THUNDERSTORMS WITH LARGE HAIL...HEAVY RAIN...STRONG WINDS AND DANGEROUS LIGHTNING. WE HAVE REPORTS OF LARGE HAIL AT THOMPSON FALLS AND THE MISSOULA AIRPORT. THESE STORMS CONTINUE TO MOVE TO THE NORTH AT 20 TO 25 MPH. 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. & WWUS35KWBC ,
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, May 31, 4:00 PM MDT, 3 hours 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA, MT 400 PM MDT MON MAY 31 1993 ...THUNDERSTORMS AND RAINSHOWERS INCREASING IN COVERAGE AND INTENSITY... THE AREA OF THUNDERSTORMS AND RAIN SHOWERS TO THE SOUTHWEST OF MISSOULA COUNTY...LOCATED IN IDAHO COUNTY IDAHO...ARE RAPIDLY INCREASING IN BOTH INTENSITY AND COVERAGE. THESE STORMS ARE FORECAST TO MOVE NORTHEAST AT 25 TO 30 MPH. THESE STORMS SHOULD MOVE INTO MONTANA WITHIN THE NEXT ONE TO TWO HOURS. NATIONAL WEATHER WERVICE WILL CONTINUE TO MONITOR THESE AND ISSUE UPDATES AS REQUIRED. THUNDERSTORMS CAN AND DO PRODUCE LIGHTNING ...HEAVY RAIN AND HAIL. BE PREPARED TO TAKE PROTECTIVE ACTION...... END/HARDY WWUS35KMKE ,
Special weather statement, May 31, 4:04 PM MDT, 3 hours 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA, MT 400 PM MDT MON MAY 31 1993 ...THUNDERSTORMS AND RAINSHOWERS INCREASING IN COVERAGE AND INTENSITY... THE AREA OF THUNDERSTORMS AND RAIN SHOWERS TO THE SOUTHWEST OF MISSOULA COUNTY...LOCATED IN IDAHO COUNTY IDAHO...ARE RAPIDLY INCREASING IN BOTH INTENSITY AND COVERAGE. THESE STORMS ARE FORECAST TO MOVE NORTHEAST AT 25 TO 30 MPH. THESE STORMS SHOULD MOVE INTO MONTANA WITHIN THE NEXT ONE TO TWO HOURS. NATIONAL WEATHER WERVICE WILL CONTINUE TO MONITOR THESE AND ISSUE UPDATES AS REQUIRED. THUNDERSTORMS CAN AND DO PRODUCE LIGHTNING ...HEAVY RAIN AND HAIL. BE PREPARED TO TAKE PROTECTIVE ACTION...... END/HARDY
Special weather statement, May 31, 5:25 PM MDT, 1 hour 55 minutes before
MTZ001-010500- SPECIAL WEATHER STATEMENT...CORRECTION...5TH LINE... NATIONAL WEATHER SERVICE KALISPELL MT 525 PM MDT MON MAY 31 1993 ... A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR MOST OF WESTERN MONTANA TO INCLUDE LINCOLN AND FLATHEAD COUNTIES.... THE NATIONAL SEVERE STORMS FORECAST CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR MOST OF WESTERN MONTANA UNTIL 11 PM MDT THIS MONDAY EVENING...TO INCLUDE LINCOLN AND FLATHEAD COUNTIES. MISSOULA RADAR HAD INDICATED A VERY STRONG THUNDESTORM WITH HEAVY RAIN AND POSSIBLE HAIL OVER NORTH CENTRAL MINERAL COUNTY JUST BEFORE 5 PM MDT...MOVING NORTH AT 20 TO 25 MPH. OTHER STRONG THUNDERSTORMS WERE BUILDING OVER NORTHERN IDAHO. THESE STORMS COULD REACH SOUTHERN LINCOLN AND FLATHEAD COUNTIES IN A COUPLE OF HOURS. DEVELOPMENT OF STORMS COULD ALSO TAKE PLACE OVER AREAS OF BOTH THESE COUNTIES WITHIN THE WATCH PERIOD. REMEMBER THAT A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF SEVERE THUNDERSTORMS. ANYONE INVOLVED IN OUTDOOR ACTIVITIES...ESPECIALLY THOSE ON AREA LAKES THIS HOLIDAY AFTERNOON...SHOULD STAY ALERT AND CLOSELY MONITOR WEATHER CONDITIONS IN CASE THUNDERSTORMS APPROACH. THE THUNDERTORMS COULD PRODUCE VERY HEAVY RAINS...STRONG GUSTY WINDS...DEADLY LIGHTNING AND POSSIBLE HAIL. SHOULD THEATENING WEATHER APPROACH YOUR LOCATION...SEEK SHELTER QUICKLY. IF YOU ARE ON A LAKE...GET TO THE NEAREST SHORE AND GO TO A SAFE PLACE. REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT AGENCIES OR THE NATIONAL WEATHER SEVICE OFFICE AS SOON AS IT IS SAFE TO DO SO. STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO OR TELEVISION FOR UPDATES ON THIS DEVELOPING WEATHER SITUATION. END/ER WWUS34KMSO ,
Special weather statement, May 31, 5:36 PM MDT, 1 hour 44 minutes before
MTZ001-010500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE KALISPELL MT 525 PM MDT MON MAY 31 1993 ... A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR MOST OF WESTERN MONTANA TO INCLUDE LINCOLN AND FLATHEAD COUNTIES.... THE NATIONAL SEVERE STORMS FORECAST CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR MOST OF WESTERN MONTANA UNTIL 11 PM MDT THIS SUNDAY EVENING...TO INCLUDE LINCOLN AND FLATHEAD COUNTIES. MISSOULA RADAR HAD INDICATED A VERY STRONG THUNDESTORM WITH HEAVY RAIN AND POSSIBLE HAIL OVER NORTH CENTRAL MINERAL COUNTY JUST BEFORE 5 PM MDT...MOVING NORTH AT 20 TO 25 MPH. OTHER STRONG THUNDERSTORMS WERE BUILDING OVER NORTHERN IDAHO. THESE STORMS COULD REACH SOUTHERN LINCOLN AND FLATHEAD COUNTIES IN A COUPLE OF HOURS. DEVELOPMENT OF STORMS COULD ALSO TAKE PLACE OVER AREAS OF BOTH THESE COUNTIES WITHIN THE WATCH PERIOD. REMEMBER THAT A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF SEVERE THUNDERSTORMS. ANYONE INVOLVED IN OUTDOOR ACTIVITIES...ESPECIALLY THOSE ON AREA LAKES THIS HOLIDAY AFTERNOON...SHOULD STAY ALERT AND CLOSELY MONITOR WEATHER CONDITIONS IN CASE THUNDERSTORMS APPROACH. THE THUNDERTORMS COULD PRODUCE VERY HEAVY RAINS...STRONG GUSTY WINDS...DEADLY LIGHTNING AND POSSIBLE HAIL. SHOULD THEATENING WEATHER APPROACH YOUR LOCATION...SEEK SHELTER QUICKLY. IF YOU ARE ON A LAKE...GET TO THE NEAREST SHORE AND GO TO A SAFE PLACE. REPORT SEVERE WEATHER TO LHOCAL LAW ENFORCEMENT AGENCIES OR THE NATIONAL WEATHER SEVICE OFFICE AS SOON AS IT IS SAFE TO DO SO. STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO OR TELEVISION FOR UPDATES ON THIS DEVELOPING WEATHER SITUATION. END/ER
Special weather statement, May 31, 5:41 PM MDT, 1 hour 39 minutes before
MTZ001-010500- SPECIAL WEATHER STATEMENT...CORRECTION...5TH LINE... NATIONAL WEATHER SERVICE KALISPELL MT 525 PM MDT MON MAY 31 1993 ... A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR MOST OF WESTERN MONTANA TO INCLUDE LINCOLN AND FLATHEAD COUNTIES.... THE NATIONAL SEVERE STORMS FORECAST CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR MOST OF WESTERN MONTANA UNTIL 11 PM MDT THIS MONDAY EVENING...TO INCLUDE LINCOLN AND FLATHEAD COUNTIES. MISSOULA RADAR HAD INDICATED A VERY STRONG THUNDESTORM WITH HEAVY RAIN AND POSSIBLE HAIL OVER NORTH CENTRAL MINERAL COUNTY JUST BEFORE 5 PM MDT...MOVING NORTH AT 20 TO 25 MPH. OTHER STRONG THUNDERSTORMS WERE BUILDING OVER NORTHERN IDAHO. THESE STORMS COULD REACH SOUTHERN LINCOLN AND FLATHEAD COUNTIES IN A COUPLE OF HOURS. DEVELOPMENT OF STORMS COULD ALSO TAKE PLACE OVER AREAS OF BOTH THESE COUNTIES WITHIN THE WATCH PERIOD. REMEMBER THAT A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF SEVERE THUNDERSTORMS. ANYONE INVOLVED IN OUTDOOR ACTIVITIES...ESPECIALLY THOSE ON AREA LAKES THIS HOLIDAY AFTERNOON...SHOULD STAY ALERT AND CLOSELY MONITOR WEATHER CONDITIONS IN CASE THUNDERSTORMS APPROACH. THE THUNDERTORMS COULD PRODUCE VERY HEAVY RAINS...STRONG GUSTY WINDS...DEADLY LIGHTNING AND POSSIBLE HAIL. SHOULD THEATENING WEATHER APPROACH YOUR LOCATION...SEEK SHELTER QUICKLY. IF YOU ARE ON A LAKE...GET TO THE NEAREST SHORE AND GO TO A SAFE PLACE. REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT AGENCIES OR THE NATIONAL WEATHER SEVICE OFFICE AS SOON AS IT IS SAFE TO DO SO. STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO OR TELEVISION FOR UPDATES ON THIS DEVELOPING WEATHER SITUATION.L END/ER
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 6:34 PM MDT | Severe Thunderstorm Warning | MSO | Mineral, Missoula, Sanders | 116 min |
| May 31, 7:20 PM MDT | Severe Thunderstorm Warning | MSO | Lake | 50 min |
| May 31, 7:28 PM MDT | Severe Thunderstorm Warning | MSO | Granite | 42 min |
| May 31, 8:19 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 71 min |
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.