Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 30, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Aug 4, 2001, 1:54 PM MDT for Powell County, Montana. It was in force for 51 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 4, 2001, 1:54 PM MDT (19:54 UTC)
- Expired
- Aug 4, 2001, 2:45 PM MDT
- In force
- 51 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Powell County, MT
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 7.9 hours before the alert went out and 205 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
- 38 J/kg
- Mixed-layer CIN
- -272 J/kg
- Mixed-layer LCL
- 2483 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -70 m²/s²
- 0-3 km storm-relative helicity
- -33 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 041956 SVRMSO MTC077-042045- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 154 PM MDT SAT AUG 4 2001 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL POWELL COUNTY IN WEST CENTRAL MONTANA * UNTIL 245 PM MDT * AT 154 PM MDT...RADAR INDICATED A SEVERE THUNDERSTORM 16 MILES SOUTHWEST OF GARRISON...OR 13 MILES WEST OF DEER LODGE...MOVING NORTH AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE... 6 MILES WEST OF GARRISON AT 210 PM MDT LARGE HAIL IS LIKELY WITH THIS SEVERE THUNDERSTORM. DAMAGING WINDS IN EXCESS OF 55 MPH ARE 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. LAT...LON 4632 11313 4628 11288 4690 11264 4695 11300
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 4, 9:31 AM MDT, 4 hours 23 minutes earlier.
Area forecast discussion, Aug 4, 9:31 AM MDT, 4 hours 23 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 931 AM MDT SAT AUG 4 2001 .SHORT TERM...HAVE UPDATED ZFP AND SFP. MSX RADAR AND SATELLITE IMAGERY SHOWS SOME SHOWERS/THUNDERSTORMS MOVING INTO SOUTHERN RAVALLI COUNTY IN THE SOUTHWEST FLOW. CLOUDS MOVING ACROSS NORTHERN IDAHO AND INTO THE NORTHWEST CORNER OF MONTANA...AHEAD OF THE UPPER TROUGH MOVING ACROSS WASHINGTON. EXPECT SCATTERED SHOWERS/THUNDERSTORMS TODAY AS THE TROUGH MOVES ACROSS THE AREA... ALONG WITH BREEZY WINDS. RIDGE REBUILDS ON SUNDAY WITH A WARMING TREND. KOLATA .MSO...NONE.
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 1:10 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Silver Bow | 65 min |
| Aug 4, 2:29 PM MDT | Severe Thunderstorm Warning | MSO | Silver Bow | 61 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2001Every severe thunderstorm warning in 2001
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.