Alert archive / Montana / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 21, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 28, 1993, 3:45 PM MDT for Judith Basin County, Montana. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Jun 28, 1993, 3:45 PM MDT (21:45 UTC)
- Expired
- Jun 28, 1993, 4:45 PM MDT
- In force
- 60 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
County Judith Basin County, MT
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 9.8 hours before the alert went out and 52 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1037 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS1 KGTF 282149 RRA SVRGTF MTC045-282245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 345 PM MDT MON JUN 28 1993 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 445 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH CENTRAL MONTANA ...JUDITH BASIN COUNTY RADAR INDICATES STRONG THUNDERSTORMS HAVE MOVED INTO NORTHWESTERN JUDITH BASIN COUNTY. THESE STORMS HAVE A HISTORY OF PRODUCING DAMAGING HAIL AND STRONG WINDS. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS.
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 28, 10:00 AM MDT, 5 hours 45 minutes before
MTZ003>009-281600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 1000 AM MDT MON JUN 28 1993 ...SEVERE THUNDERSTORMS LIKELY IN MONTANA EAST OF THE CONTINENTAL DIVIDE THIS AFTERNOON AND EARLY TONIGHT... A STRONG UPPER LEVEL LOW PRESSURE SYSTEM IN THE PACIFIC NORTHWEST WILL BE MOVING INTO THE NORTHERN GREAT BASIN THIS AFTERNOON AND MONTANA TONIGHT. THE AIR IN MONTANA AHEAD OF THIS LOW IS MOIST AND UNSTABLE. ALREADY THIS MORNING...SCATTERED THUNDERSTORMS ARE OCCURRING AROUND THE STATE. THIS LOW WILL GENERATE STRONG THUNDERSTORMS IN MONTANA EAST OF THE DIVIDE. SOME LIKELY WILL BE SEVERE WITH DAMAGING WINDS...LARGE HAIL ...AND BRIEF HEAVY RAIN. TORNADOES ARE EVEN POSSIBLE. THE STRONG THUNDERSTORMS SHOULD DEVELOP IN THE WESTERN PORTION EAST OF THE DIVIDE EARLY AND MID AFTERNOON AND TRACK OUT INTO EASTERN MONTANA EARLY TONIGHT. THIS LIKELY WILL BE A MAJOR SEVERE WEATHER EVENT FOR MONTANA. RESIDENTS EAST OF THE DIVIDE SHOULD STAY TUNED TO THE RADIO OR TELEVISION FOR THE LATEST WATCHES AND WARNINGS. IF THREATENING WEATHER APPROACHES BE PREPARED TO SEEK SHELTER IMMEDIATELY. OARD
Special weather statement, Jun 28, 1:15 PM MDT, 2 hours 30 minutes before
MTZ003>009-290100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 115 PM MDT MON JUN 28 1993 ...TORNADO WATCHES IN EFFECT FOR ALL OF MONTANA EAST OF THE CONTINENTAL DIVIDE... THE ATMOSPHERE OVER MONTANA HAS BECOME VERY UNSTABLE AND NUMEROUS THUNDERSTORMS ARE DEVELOPING ACROSS THE STATE. EASTERLY SURFACE WINDS ARE BRINGING LOW LEVEL MOISTURE INTO THE STATE...WHILE SOUTHWESTERLY FLOW ALOFT WILL BRING A STRONG UPPER LEVEL DISTURBANCE ACROSS THE AREA. THIS WILL COMBINE TO ALLOW STRONG THUNDERSTORMS TO DEVELOP...SOME PRODUCING LARGE HAIL...DANGEROUS LIGHTNING...DAMAGING WINDS...LOCALLY HEAVY RAINS AND POSSIBLY TORNADOES. THE TORNADO WATCHES ARE IN EFFECT UNTIL THE EARLY EVENING HOURS. PEOPLE IN MONTANA EAST OF THE CONTINENTAL DIVIDE SHOULD BE PREPARED FOR SEVERE WEATHER AND POSSIBLY TORNADOES AND BE PREPARED TO TAKE ACTION SHOULD THREATENING WEATHER APPROACH. BORSUM
Special weather statement, Jun 28, 1:26 PM MDT, 2 hours 19 minutes before
MTZ003>009-290100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 115 PM MDT MON JUN 28 1993 ...TORNADO WATCHES IN EFFECT FOR ALL OF MONTANA EAST OF THE CONTINENTAL DIVIDE... THE ATMOSPHERE OVER MONTANA HAS BECOME VERY UNSTABLE AND NUMEROUS THUNDERSTORMS ARE DEVELOPING ACROSS THE STATE. EASTERLY SURFACE WINDS ARE BRINGING LOW LEVEL MOISTURE INTO THE STATE...WHILE SOUTHWESTERLY FLOW ALOFT WILL BRING A STRONG UPPER LEVEL DISTURBANCE ACROSS THE AREA. THIS WILL COMBINE TO ALLOW STRONG THUNDERSTORMS TO DEVELOP...SOME PRODUCING LARGE HAIL...DANGEROUS LIGHTNING...DAMAGING WINDS...LOCALLY HEAVY RAINS AND POSSIBLY TORNADOES. THE TORNADO WATCHES ARE IN EFFECT UNTIL THE EAR:LY EVENING HOURS. PEOPLE IN MONTANA EAST OF THE CONTINENTAL DIVIDE SHOULD BE PREPARED FOR SEVERE WEATHER AND POSSIBLY TORNADOES AND BE PREPARED TO TAKE ACTION SHOULD THREATENING WEATHER APPROACH. BORSUM
Special weather statement, Jun 28, 2:59 PM MDT, 46 minutes before
MTZ004-282200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HELENA MT 259 PM MDT MON JUN 28 1993 ...THUNDERSTORMS CONTINUE TO MOVE ACROSS SOUTHWEST MONTANA... THUNDERSTORMS CONTINUE IN HELENA AND BUTTE. THUNDERSTORMS ARE NEAR BOZEMAN AND SHOULD MOVE INTO THAT CITY BY 3PM. SPOTTERS REPORT SOFT SMALL HAIL NEAR CLANCY...10 MILES SOUTH OF HELENA. THE STRONGEST STORMS AS DEPICTED BY RADAR ARE IN SOUTHERN CASCADE AND EXTRME NORTHWEST MEAGHER COUNTY. THEY CONTINUE TO MOVE TO THE NORTHEAST AT 30 TO 35 MPH. ALL OF SOUTHWEST MONTANA IS UNDER A TORNADO WATCH UNTIL 7PM MDT THIS MONDAY EVENING. STAY TUNED TO YOUR FAVORITE WEATHER SOURCE FOR FUTHER INFORMATION ON THE WATCH AND POS SIBLE WARNINGS. &
Local storm report, Jun 28, 3:45 PM MDT, 0 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HELENA, MT
345 PM MDT MON JUN 28 1993
STORM REPORTS FOR JUNE 28 1993
TIME LOCATION EVENT
1243 MARYSVILLE MARBLE SIZED HAIL
CANYON CREKK DIME SIZED HAIL
115 PM MDT DOWNTOWN HELENA REPORTS OF HAIL 1/2 TO 11/2 INCH IN
DIAMETER.
144 PM MDT JEFFERSON CITY HAIL UP TO 3 INCHES. STORM SURVEY BY
ET FOUND 1 1/2 TO 2 INCH.
326 PM MDT WINSTON SMALL SOFT HAILLocal storm report, Jun 28, 3:45 PM MDT, 0 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HELENA, MT
345 PM MDT MON JUN 28 1993
STORM REPORTS FOR JUNE 28 1993
TIME LOCATION EVENT
1243 MARYSVILLE MARBLE SIZED HAIL
CANYON CREKK DIME SIZED HAIL
115 PM MDT DOWNTOWN HELENA REPORTS OF HAIL 1/2 TO 11/2 INCH IN
DIAMETER.
144 PM MDT JEFFERSON CITY HAIL UP TO 3 INCHES. STORM SURVEY BY
ET FOUND 1 1/2 TO 2 INCH.
326 PM MDT WINSTON SMALL SOFT HAILThe office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 9:17 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 43 min |
| Jun 28, 1:00 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 60 min |
| Jun 28, 3:00 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 60 min |
| Jun 28, 3:11 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 64 min |
| Jun 28, 4:13 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 62 min |
| Jun 28, 4:55 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 65 min |
| Jun 28, 5:27 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 63 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.