Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 12, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jun 6, 1997, 1:55 PM MDT for Deer Lodge County, Silver Bow County, Montana. It was in force for 65 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 6, 1997, 1:55 PM MDT (19:55 UTC)
- Expired
- Jun 6, 1997, 3:00 PM MDT
- In force
- 65 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
Counties Deer Lodge County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 146 km from the middle of the area, began a volume at 19:55 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 7.9 hours before the alert went out and 238 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
- 986 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSO 062000 SVRMSO MTC023-093-062100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 155 PM MDT FRI JUN 6 1997 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 300 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWEST MONTANA ...EASTERN DEER LODGE COUNTY...WESTERN SILVER BOW COUNTY AT 150 P.M. MDT WEATHER RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES WEST OF BUTTE. THIS STORM WAS MOVING TO THE NORTHEAST AT 25 MPH. IT HAS A HISTORY OF PRODUCING HAIL AND HEAVY RAINS. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'TP USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
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.
NWS Missoula, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 6, 9:23 AM MDT, 4 hours 32 minutes earlier.
Area forecast discussion, Jun 6, 9:23 AM MDT, 4 hours 32 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION...COR NATIONAL WEATHER SERVICE MISSOULA MT 915 AM MDT FRI JUN 6 1997 FLOOD WARNINGS MONTANA ZONES 2-4>6...IDAHO ZONES 9-10. FLOOD WATCHES MONTANA ZONES 2-3. UPPER LEVEL LOW OVER SOUTHERN CALIFORNIA IN CONJUNCTION WITH LOW IN THE GULF OF ALASKA FORMS A DEFORMATION ZONE OVER WESTERN MONTANA THIS MORNING. THIS AXIS SHIFTS INTO SOUTHWEST MONTANA LATER THIS MORNING. WITH SOME CLEAR SPOTS THIS MORNING IN ZONE 8 EXPECT SOME AFTERNOON TSTMS TO DEVELOP...MAINLY IN THE EASTERN HALF ALONG THE DEFORMATION ZONE. THESE TSTMS SHOULD HEAD TOWARDS THERMAL TROF OVER CENTRAL MONTANA. BELIEVE TOO MUCH CLOUD COVER FOR TSTMS ZONES 4 THROUGH 6...BUT SINCE ONLY ISOLATED WILL LEAVE IN. NEW ETA FORECASTS SEVERAL VORT MAXES ROTATING THROUGH H5 UPPER FLOW TODAY THUS WILL KEEP POPS SCATTERED FOR ALL AREAS. LOOKS LIKE YO-YO EFFECT LAST 24 HOURS WITH POPS. WITH 00Z NGM AND ETA HAVE GOOD 700/300 MB COUPLET FOR SATURDAY AM WONDERING WHY POPS SO LOW. WILL BUMP POPS BACK UP TO 30 PER CENT EVEN THOUGH PREFER TO WAIT THIS AFTERNOON...BUT WITH ALL THE MOISTURE AND DYNAMICS...10 PER CENTS LOOKS WAY TOO LOW. IDAHO POPS FOR S80 AND P69 LOOK OK AS MAIN FOCUSING EAST OF THEM... BUT WILL ADJUST S80 A TAD UPWARD DUE TO ALL THE MOISTURE AND UPSLOPE PRESENT. PLAN ON UPDATE. HARMER ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 068/052 073/... ... 32323 FCA EE 068/052 074/050 072 32423 POL .. 069/051 073/... ... 32523 MSO CE 070/052 074/050 072 32523 HMM .. 073/052 076/... ... 32523 BTM .. 070/045 074/... ... 32533 S80 .. 066/046 070/... ... 32112 P69 .. 068/050 074/... ... 32112 SMN .. 074/053 077/... ... 32212
Nearby
Severe Thunderstorm Warnings in Montana, 1997Every severe thunderstorm warning in 1997
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; radar from the NEXRAD Level II archive.