Alert archive / Montana / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 13, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 21, 1993, 5:15 PM MDT for Pondera County, Montana. It was in force for 30 min.
The area
The counties it named.
The facts
- Issued
- Jun 21, 1993, 5:15 PM MDT (23:15 UTC)
- Expired
- Jun 21, 1993, 5:45 PM MDT
- In force
- 30 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
County Pondera County, MT
The nearest sounding before it
Great Falls, MT (KGTF), launched 12:00Z, 11.3 hours before the alert went out and 108 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
- 205 J/kg
- Mixed-layer CIN
- -260 J/kg
- Mixed-layer LCL
- 2366 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 21, 3:29 PM MDT, 1 hour 46 minutes before
MTZALL-212330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 326 PM MDT MON JUN 21 1993 ...SEVERE THUNDERSTORM WATCH FOR WESTERN MONTANA UNTIL 8 PM MDT.. ...SEVERE THUNDERSTORM WATCH FOR CENTRAL MONTANA UNTIL 10 PM MDT... A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR CENTRAL MONTANA ALONG AND WEST OF A GLASGOW-MILES CITY LINE UNTIL 10 PM MDT. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR WESTERN MONTANA UNTIL 8 PM MDT. RADAR REPORTS AND LIGHTNING DETECTION CHARTS INDICATE THUNDERSTORMS ARE RAPIDLY DEVELOPING OVER WESTERN AND CENTRAL MONTANA. THUNDERSTORMS HAVE BEEN ACCOMPANIED BY STRONG GUSTY WINDS...UP TO 50 MPH NEAR DARBY. WEATHER SPOTTERS IN POWELL COUNTY REPORTED WINDS OF 20 TO 30 MPH AND RAIN COMING DOWN IN BUCKETS. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF SEVERE WEATHER. SO FAR...WE HAVE NOT RECEIVED ANY REPORTS OF SEVERE THUNDERSTORMS. LISTEN TO YOUR LOCAL RADIO OR TELEVISION STATION...OR THE WEATHER RADIO FOR THE LATEST WEATHER INFORMATION.
Special weather statement, Jun 21, 3:38 PM MDT, 1 hour 37 minutes before
MTZ005-220130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HAVRE MT 330 PM MDT WED JUN 22 1993 ...SEVERE THUNDERSTORM WATCH FOR PARTS OF NORTH-CENTRAL MONTANA UNTIL 10 PM... LATEST LIGHTNING AND RADAR REPORTS INDICATE THUNDERSTORMS DEVELOPIING FROM RED LODGE TO MISSOULA. THUNDERSTORMS HAVE ALSO BEEN REPORTED NEAR CUT BANK THESE STORMS ARE LIKELY TO SPREAD ACROSS LIBERTY...HILL AND BLAINE COUNTY LATER THIS AFTERNOON OR EARLY EVENING...ACCOMPANIED BY STRONG WINDS...LARGE HAIL AND BRIEF PERIODS OF HEAVY RAIN. IF A THREATENING STORM IS OBSERVED...SEEK SHELTER IMMEDIATELY. LISTEN TO YOUR LOCAL RADIO OR TV STATION...OR THE WEATHER RADIO FOR THE LATEST INFORMATION. NORTHERN HILL COUNTIES SHOULD BEWARE OF THIS KLUNDER OTHER STORMS ARE LIKELY TO FORM IN NORTH-CENTRAL MONTANA THIS EVENING. A SEVERE THUNDERSTORM WATCH MEANS LARGE HAIL...DAMAGING WINDS...HEAVY SHOWERS...AND FREQUENT LIGHTNING STRIKES ARE POSSIBLE. SIMONSEN
Special weather statement, Jun 21, 3:56 PM MDT, 1 hour 19 minutes before
MTZ005-220130- SPECIAL WEATHER STATEMENT COR NATIONAL WEATHER SERVICE HAVRE MT 330 PM MDT WED JUN 22 1993 ...SEVERE THUNDERSTORM WATCH FOR PARTS OF NORTH-CENTRAL MONTANA UNTIL 10 PM... LATEST LIGHTNING AND RADAR REPORTS INDICATE THUNDERSTORMS DEVELOPIING FROM RED LODGE TO MISSOULA. THUNDERSTORMS HAVE ALSO BEEN REPORTED NEAR CUT BANK THESE STORMS ARE LIKELY TO SPREAD ACROSS LIBERTY...HILL AND BLAINE COUNTY LATER THIS AFTERNOON OR EARLY EVENING...ACCOMPANIED BY STRONG WINDS...LARGE HAIL AND BRIEF PERIODS OF HEAVY RAIN. IF A THREATENING STORM IS OBSERVED...SEEK SHELTER IMMEDIATELY. LISTEN TO YOUR LOCAL RADIO OR TV STATION...OR THE WEATHER RADIO FOR THE LATEST INFORMATION. NORTHERN HILL COUNTIES SHOULD BEWARE OF THIS KLUNDER
Special weather statement, Jun 21, 4:00 PM MDT, 1 hour 15 minutes before
MTZ004-212300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HELENA MT 352 PM MDT MON JUN 21 1993 ...STRONG THUNDERSTORMS CONTINUE THOUGHOUT SOUTHWEST MONTANA... ...SEVERE THUNDERSTORM WATCHS IS IN EFFECT UNTIL 8 PM AND 10 PM... AT 3:30 PM MDT AN AREA OF STRONG THUNDERSTORMS WAS MOVING THROUGH DEER LODGE AND POWELL COUNTIES INTO NORTHERN JEFFERSON AND LEWIS AND CLARK COUNTIES. HEAVY RAINS WERE REPORTED IN THE LINCOLN AND MARYSVILLE AREAS WITH WIND GUSTS OF 30 TO 40 MPH. WIND GUSTS TO 40 MPH WERE REPORTEAT THE HELENA AIRPORT WITH FREQUENT LIGHTNING AND STRONG THUNDERSTORMS MOVING ACROSS TO THE WEST AND NORTH OF THE HELENA VALLEY. ANOTHER AREA OF STRONG THUNDERSTORMS WAS DEVELOPING IN EASTERN IDAHO AND MOVING TOWARDS THE WEST YELLOWSTONE AREA. THESE THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE HEAVY RAINS, LARGE HAIL, AND DAMAGING WINDS. &
Special weather statement, Jun 21, 4:02 PM MDT, 1 hour 13 minutes before
MTZ004-212300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HELENA MT 352 PM MDT MON JUN 21 1993 ...STRONG THUNDERSTORMS CONTINUE THOUGHOUT SOUTHWEST MONTANA... ...SEVERE THUNDERSTORM WATCHES ARE IN EFFECT UNTIL 8 PM AND 10 PM... AT 3:30 PM MDT AN AREA OF STRONG THUNDERSTORMS WAS MOVING THROUGH DEER LODGE AND POWELL COUNTIES INTO NORTHERN JEFFERSON AND LEWIS AND CLARK COUNTIES. HEAVY RAINS WERE REPORTED IN THE LINCOLN AND MARYSVILLE AREAS WITH WIND GUSTS OF 30 TO 40 MPH. WIND GUSTS TO 40 MPH WERE REPORTE AT THE HELENA AIRPORT WITH FREQUENT LIGHTNING AND STRONG THUNDERSTORMS MOVING ACROSS TO THE WEST AND NORTH OF THE HELENA VALLEY. ANOTHER AREA OF STRONG THUNDERSTORMS WAS DEVELOPING IN EASTERN IDAHO AND MOVING TOWARDS THE WEST YELLOWSTONE AREA. THESE THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE HEAVY RAINS, LARGE HAIL, AND DAMAGING WINDS. &
Special weather statement, Jun 21, 4:38 PM MDT, 37 minutes before
MTZ005-060130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HAVRE MT 615 PM MDT WED AUG 5 1992 ...SEVERE THUNDERSTORM WATCH FOR PARTS OF NORTH-CENTRAL MONTANA UNTIL 9 PM... RADAR REPORTS AND LIGHTNING STRIKE CHARTS SHOWED SCATTERED STRONG THUNDERSTORMS IN BLAINE COUNTY...MOVING EAST AT 25 MPH. HEAVY SHOWERS AND GUSTY WINDS OCCURRED WITH THE STORMS...BUT NOTHING SEVERE HAS BEEN REPORTED. ELSEWHERE AT 610 PM...A SEVERE THUNDERSTORM WAS MOVING EAST ACROSS SOUTHERN ALBERTA...NOT FAR FROM THE U.S BORDER...NORTH OF LIBERTY COUNTY. THIS STORM REPORTEDLY PRODUCED SEVERE WEATHER...INCLUDING 3 TORNADOES IN EXTREME SOUTHERN ALBERTA. PERSONS IN EXTREME NORTHERN LIBERTY AND EXTREME NORTHERN HILL COUNTIES SHOULD BEWARE OF THIS STORM. OTHER STORMS ARE LIKELY TO FORM IN NORTH-CENTRAL MONTANA THIS EVENING. A SEVERE THUNDERSTORM WATCH MEANS LARGE HAIL...DAMAGING WINDS...HEAVY SHOWERS...AND FREQUENT LIGHTNING STRIKES ARE POSSIBLE. SIMONSEN
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 4:28 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 62 min |
| Jun 21, 4:39 PM MDT | Severe Thunderstorm Warning | TFX | Pondera | 66 min |
| Jun 21, 4:54 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 66 min |
| Jun 21, 5:12 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 33 min |
| Jun 21, 5:30 PM MDT | Tornado Warning | TFX | Pondera, Toole | 30 min |
| Jun 21, 5:50 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Toole | 55 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.