Alert archive / Montana / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 29, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 29, 1996, 3:18 PM MDT for Silver Bow County, Montana. It was in force for 57 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
- Jul 29, 1996, 3:18 PM MDT (21:18 UTC)
- Expired
- Jul 29, 1996, 4:15 PM MDT
- In force
- 57 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Silver Bow County, MT
The radar
The Missoula radar (KMSX), 162 km from the middle of the area, began a volume at 21:19 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, 9.3 hours before the alert went out and 234 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
- 2514 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -44 m²/s²
- 0-3 km storm-relative helicity
- -5 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 292118 SVRMSO MTC093-292215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 318 PM MDT MON JUL 29 1996 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 415 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHWEST MONTANA ...SILVER BOW COUNTY AT 315 PM MDT...MISSOULA DOPPLER RADAR INDICATES A SEVERE THUNDERSTORM IN CENTRAL SILVER BOW COUNTY...2 MILES WEST OF BUTTE. THE STORM IS MOVING VERY SLOWLY AND WILL AFFECT THE CITY OF BUTTE THROUGH 400 PM MDT. EARLIER STORMS IN THIS AREA PRODUCED 1 INCH HAIL AND OVER 1/2 INCH OF RAIN IN 20 MINUTES. 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. END/BARKER
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 Jul 29, 1:30 PM MDT, 1 hour 48 minutes earlier.
Area forecast discussion, Jul 29, 1:30 PM MDT, 1 hour 48 minutes before
CONVECTION FIRING ALONG CONVERGENCE LINE IN THE CENTER OF THE THERMAL TROUGH RUNNING FROM ABOUT MULLAN TO BETWEEN MISSOULA AND HAMILTON AND THEN SOUTH OF BUTTE. PLENTY OF MOISTURE SOUTH OF THIS LINE AND WISDOM JUST GOT 1 INCH HAIL. THIS AXIS MOVES VERY SLOWLY EAST TONIGHT...AND VORT MAX MOVES OUT OF AREA BY EARLY TOMORROW...BUT LEAVES SUFFICIENT MOISTURE AND LOTS OF INSTABILITY FOR A DECENT DAY OF THUNDER TOMORROW AS WELL...ESPECIALLY IN THE SOUTH. WILL MAKE MAX POPS IN MONTANA ZONE 2 TONIGHT...AND WILL BACK OFF FOR TOMORROW AND IN THE NORTHWEST JUST A BIT. BARKER. FCA 2211 055/090/053/090 LIB 2211 057/086/055/086 POL 2222 060/086/055/086 MSO 3222 059/090/055/090 HMM 4322 056/091/053/091 FN/01
In the hours before
Special weather statement, Jul 29, 12:35 PM MDT, 2 hours 43 minutes before
MTZ002-004-IDZ010-292130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 1230 PM MDT MON JUL 29 1996 ...THUNDERSTORMS BEGINNING TO DEVELOP IN WEST CENTRAL AND SOUTHWEST MONTANA...AND EAST CENTRAL IDAHO MOUNTAINS... AT 1230 PM MDT DOPPLER RADAR...SATELLITE IMAGERY...AND AUTOMATED LIGHTING DETECTION EQUIPMENT INDICATE THAT SCATTERED THUNDERSTORMS ARE BEGINNING TO BUILD OVER THE MOUNTAINS OF WEST CENTRAL AND SOUTHWEST MONTANA...AND THE EAST CENTRAL MOUNTAINS OF IDAHO. THESE STORMS ARE MAINLY SOUTH OF A LINE RUNNING FROM STEVENSVILLE TO BUTTE...AND ARE MOVING ONLY VERY SLOWLY TO THE NORTH. THE STORMS IN MONTANA ARE OCCURRING OVER AREAS WITH VERY DRY AIR AT THE LOW LEVELS...AND THEY WILL LIKELY BRING GUSTY WINDS TO AREAS OF SOUTHWEST AND WEST CENTRAL MONTANA OVER THE NEXT FEW HOURS. THE STORMS FURTHER SOUTH IN IDAHO HAVE DEEPER MOISTURE TO WORK WITH...AND HEAVY RAINFALL IS A POSSIBILITY WITH THESE STORMS. AS THE AFTERNOON PROGRESSES...THE DEEPER MOISTURE WILL WORK ITS WAY INTO MONTANA BRINGING THE POSSIBILITY OF HEAVY RAINFALL INTO THIS AREA AS WELL LATER THIS EVENING. ALL THESE STORMS WILL PRODUCE LIGHTNING AND POSSIBLY SMALL HAIL. IF THUNDERSTORMS APPROACH YOUR AREA...SEEK SHELTER INDOORS. REMEMBER THAT LIGHTNING CAN KILL. STAY TUNED FOR FURTHER UPDATES ON THESE STORMS. END/BARKER
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 1:10 PM MDT | Severe Thunderstorm Warning | MSO | Beaverhead, Deer Lodge, Silver Bow | 65 min |
| Jul 29, 4:26 PM MDT | Flash Flood Warning | MSO | Silver Bow | 3 hr |
Nearby
Severe Thunderstorm Warnings in Montana, 1996Every severe thunderstorm warning in 1996
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.