Alert archive / Montana / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 19, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 22, 2000, 2:02 PM MDT for Madison County, Montana. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Jun 22, 2000, 2:02 PM MDT (20:02 UTC)
- Expired
- Jun 22, 2000, 2:30 PM MDT
- In force
- 28 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Madison County, MT
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 8.0 hours before the alert went out and 244 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
- 1365 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- -61 m²/s²
- 0-3 km storm-relative helicity
- 156 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
257 WUUS55 KTFX 222002 SVRGTF MTC057-222030- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 202 PM MDT THU JUN 22 2000 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN MADISON COUNTY IN SOUTHWEST MONTANA * UNTIL 230 PM MDT * AT 159 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 16 MILES NORTHWEST OF TWIN BRIDGES...OR ABOUT 17 MILES SOUTH OF BUTTE...MOVING EAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... 7 MILES NORTH OF TWIN BRIDGES AT 220 PM MDT 3 MILES SOUTH OF SILVER STAR AT 225 PM MDT VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A SUBSTANTIAL SHELTER. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN GREAT FALLS. LAT...LON 4574 11267 4553 11267 4548 11202 4574 11198
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 Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 22, 9:30 AM MDT, 4 hours 32 minutes earlier.
Area forecast discussion, Jun 22, 9:30 AM MDT, 4 hours 32 minutes before
SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREAT FALLS MT 930 AM MDT THU JUN 22 2000 ...UPDATE PLANNED BY 1000 AM... NESDIS GOES SOUNDINGS INDICATED MOST OF MONTANA EAST OF DIVIDE IS UNSTABLE. RADAR SHOWS SCATTERED RAINSHOWERS OVER PARTS OF NORTHERN ZONES AS WELL AS SOUTH CENTRAL ZONES...ALONG WITH A FEW THUNDERSTORMS. THESE APPEAR TO BE ASSOCIATED WITH A WEAK SHORT WAVE CROSSING THE ROCKIES AND SHOULD CONTINUE TO MOVE EAST. WESTERLY FLOW ALOFT IS FAIRLY MOIST HOWEVER WATER VAPOR INDICATES DRY AIR MOVING ACROSS NORTHERN ROCKIES AND THE AIR MASS WILL BE DRYING FROM THE NORTHWEST...BUT MID LEVELS REMAIN MOIST. ALOS....INDICES SHOW WIDESPREAD WEAK INSTABLITY AGAIN THIS AFTERNOON. SW MT UNDER AREA OF DIVERGENCE ALOFT...COMBINED WITH INSTABILITY AND MOISTURE CONVERGENCE APPEARS SHOULD BE AREA OF HIGHEST POPS FOR TODAY. ANOTHER SHORT WAVE MOVES ACROSS NORTHERN ZONES AFTER 00Z AND SHOULD BE ENOUGH TO KICK OFF A FEW THUNDERSTORMS TOWARDS FRIDAY MORNING. ZELZER CCF NUMBERS GTF BB 078/054 072/045 069 201334 CTB BB 074/050 068/043 066 202335 HLN BE 083/054 076/050 083 202333 BZN BE 082/050 076/044 081 202333 WEY BE 075/035 070/039 075 203334 DLN BE 081/050 076/048 083 202233 HVR BB 081/054 074/049 076 202225 LWT BE 075/050 068/046 068 203245
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 1:09 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead | 36 min |
| Jun 22, 2:35 PM MDT | Severe Thunderstorm Warning | TFX | Madison | 40 min |
| Jun 22, 2:59 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 46 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2000Every severe thunderstorm warning in 2000
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.