Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 29, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Aug 4, 2001, 1:10 PM MDT for Deer Lodge County, Silver Bow County, Montana. It was in force for 65 min. 2 reports came from 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, with what was reported inside it.
The facts
- Issued
- Aug 4, 2001, 1:10 PM MDT (19:10 UTC)
- Expired
- Aug 4, 2001, 2:15 PM MDT
- In force
- 65 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Deer Lodge County, MT, Silver Bow County, MT
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 4, 1:17 PM MDT | Hail 0.88 | Wise River, MT | Actual spotter location Wise River 3 W...0.23 inches of rain also fell in less than 5 minutes. |
| Aug 4, 1:55 PM MDT | Hail 1.5 | Butte, MT |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 7.2 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
- 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 041912 SVRMSO MTC023-093-042015- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 110 PM MDT SAT AUG 4 2001 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN DEER LODGE COUNTY IN WEST CENTRAL MONTANA NORTHERN SILVER BOW COUNTY IN WEST CENTRAL MONTANA * UNTIL 215 PM MDT * AT 110 PM MDT...SPOTTERS REPORTED A SEVERE THUNDERSTORM 15 MILES SOUTHWEST OF GREGSON HOT SPRINGS...OR 20 MILES SOUTH OF ANACONDA... MOVING NORTHEAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE... 6 MILES SOUTHEAST OF GREGSON HOT SPRINGS AT 120 PM MDT OVER SILVER BOW AT 130 PM MDT 6 MILES NORTHWEST OF BUTTE AT 145 PM MDT 4 MILES NORTHWEST OF WALKERVILLE AT 150 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 PR!OTECTION...GO INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL PROTECTED AREA. LAT...LON 4587 11308 4574 11290 4604 11239 4622 11264
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, 3 hours 39 minutes earlier.
Area forecast discussion, Aug 4, 9:31 AM MDT, 3 hours 39 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, 1:54 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 51 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.