Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 20, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 16, 2001, 1:59 PM MDT for Powell County, Montana. It was in force for 46 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
- Jul 16, 2001, 1:59 PM MDT (19:59 UTC)
- Expired
- Jul 16, 2001, 2:45 PM MDT
- In force
- 46 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Powell County, MT
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 16, 1:45 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 8.0 hours before the alert went out and 196 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
- 1797 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 56 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 162003 SVRMSO MTC077-162045- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 159 PM MDT MON JUL 16 2001 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN POWELL COUNTY IN WEST CENTRAL MONTANA * UNTIL 245 PM MDT * AT 159 PM MDT...RADAR INDICATED SEVERE THUNDERSTORMS 10 MILES WEST OF DEER LODGE AND 10 MILES EAST OF DEER LODGE...MOVING NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORMS WILL REMAIN OVER RURAL SOUTHEAST POWELL COUNTY. SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND HAIL...ALONG WITH FREQUENT LIGHTNING AND HEAVY RAIN. FOR YOUR PROTECTION...GO INDO^ORS AND STAY AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL PROTECTED AREA. LAT...LON 4640 11304 4626 11262 4652 11233 4675 11266
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 16, 8:51 AM MDT, 5 hours 8 minutes earlier.
Area forecast discussion, Jul 16, 8:51 AM MDT, 5 hours 8 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 851 AM MDT MON JUL 16 2001 .SHORT TERM...UNSEASONABLY COLD UPPER TROF CONTINUES TO DIG INTO WA STATE. NICE BAROCLINIC ZONE WITH WIDESPREAD PRECIP IS CONTINUING TO DEVELOP ALONG EAST SIDE OF TROF FROM EXTREME NW MT TO ERN OR. A FEW LIGHTNING STRIKES REPORTED IN CENTRAL ID IN WARM SECTOR AHEAD OF FRONT. EXPECT THE FRONTAL BAND TO EDGE SLOWLY EASTWARD TODAY WITH LIKELY POPS EVERYWHERE. DAYTIME HEATING IN THE WARM SECTOR WILL DESTABILIZE ATMOSPHERE OVER SRN CWA THIS AFTERNOON FOR THUNDERSTORM DEVELOPMENT. THE POTENTIAL FOR LOCALLY HEAVY RAIN WITH ANY THUNDERSTORM EXISTS SO WILL CONTINUE FLASH FLOOD WATCH FOR THE BURN AREAS. INSTABILITY IS ONLY MARGINAL...BUT CAN NOT RULE A SEVERE CELL OR TWO SE CWA. FRONTAL BAND STALLS AND WEAKENS OVER ERN CWA OVERNIGHT FOR A CONTINUED SHOWER THREAT AS A VORT LOBE ROUNDS THE BASE OF THE TROF EARLY TUESDAY. THE AIRMASS BECOMES SOMEWHAT DRIER AND MORE STABLE ON TUESDAY...BUT WITH COLD AIR ALOFT THE THREAT OF WIDELY SCATTERED SHOWERS WILL CONTINUE. MINOR UPDATES PLANNED. PETRESCU .MSO...FLASH FLOOD WATCH FOR THE BURN AREAS OF RAVALLI COUNTY TODAY.
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 2:35 PM MDT | Severe Thunderstorm Warning | MSO | Silver Bow | 25 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.