Alert archive / Montana / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 12, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Aug 10, 2000, 3:46 PM MDT for Deer Lodge County, Granite County, Montana. It was in force for 44 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
- Aug 10, 2000, 3:46 PM MDT (21:46 UTC)
- Expired
- Aug 10, 2000, 4:30 PM MDT
- In force
- 44 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Deer Lodge County, MT, Granite County, MT
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 9.8 hours before the alert went out and 257 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
- 3630 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -32 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KMSO 102147 SVRMSO MTC023-039-102230- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 346 PM MDT THU AUG 10 2000 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN DEER LODGE COUNTY IN WEST CENTRAL MONTANA SOUTHEASTERN GRANITE COUNTY IN WEST CENTRAL MONTANA * UNTIL 430 PM MDT * AT 346 PM MDT...RADAR INDICATED A SEVERE THUNDERSTORM 12 MILES SOUTHWEST OF PORTERS CORNER...OR 27 MILES WEST OF ANACONDA...MOVING EAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE... 6 MILES SOUTH OF PORTERS CORNER AT 425 PM MDT OVER GEORGETOWN AT 430 PM MDT DAMAGING WINDS IN EXCESS OF 55 MPH ARE LIKELY WITH THIS SEVERE THUNDERSTORM. LARGE HAIL IS POSSIBLE...ALONG WITH FREQUENT LIGHTNING AND HEAVY RAIN. FOR YOUR PROTECTION...GO INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL PROTECTED AREA. g LAT...LON 4618 11363 4601 11354 4610 11304 4634 11315
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 Aug 10, 2:45 PM MDT, 1 hour 1 minute earlier.
Area forecast discussion, Aug 10, 2:45 PM MDT, 1 hour 1 minute before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 245 PM MDT THU AUG 10 2000 UPPER LOW LIFTING NORTHEAST ACROSS AREA OVERNIGHT. WHEN COMBINED WITH MID-LEVEL MOISTURE...INSTABILITY...AND UPPER-LEVEL JET...THIS SHOULD PRODUCE NUMEROUS THUNDERSTORMS THIS EVENING...AND LINGER INTO EARLY MORNING. STORMS STILL LOOK MAINLY DRY WITH LOW LEVELS REMAINING QUITE DRY...SO WINDS ARE THE MAIN CONCERN THIS EVENING...ESPECIALLY SINCE PRESSURE GRADIENTS ASSOCIATED WITH COOLER AIR PUSHING IN BEHIND THE UPPER LOW ARE ALSO INVOLVED. THERE IS AN INCREASE IN LOWER-LEVEL MOISTURE NEAR THE UPPER LOW...SO NORTHWEST MONTANA MIGHT HAVE A BETTER CHANCE OF SEEING A BIT MORE PRECIP FROM THESE STORMS AS THE LOW MOVES OVERHEAD NEAR MORNING. WITH WINDS AND CONVECTION THROUGH MUCH OF THE NIGHT...RED FLAG WARNING WILL BE EXTENDED THROUGH TONIGHT. PRESSURE GRADIENTS CONTINUE VERY STRONG ON FRIDAY FOR ANOTHER WINDY DAY...SO FIRE WEATHER WATCH FOR THAT TIME FRAME ALSO BEING WORKED ON. TEMPERATURES MUCH COOLER FRIDAY...THEN SLOW WARMING ON SATURDAY. BARKER. EXTENDED...NO RELIEF EXPECTED FOR FIRE SITUATION. ZONAL FLOW DEVELOPING OVER THE NORTHERN CONUS INTO EARLY NEXT WEEK WITH 126HR 12Z AVN CONTINUING 00Z MRF TREND SHOWING ONLY A WEAK RIPPLE...THOUGH DELAYED...OVER THE PACIFIC NORTHWEST TUESDAY. NOTHING INDICATED TO DEVIATE FROM DRY AND BREEZY FORECAST WITH NEAR NORMAL TEMPS. SIGLER
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 4:08 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Granite, Powell | 52 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.