Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 17, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 13, 2001, 5:43 PM MDT for Silver Bow County, Montana. It was in force for 37 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 13, 2001, 5:43 PM MDT (23:43 UTC)
- Expired
- Jul 13, 2001, 6:20 PM MDT
- In force
- 37 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Silver Bow 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 13, 2:15 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 11.7 hours before the alert went out and 255 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
- 100 J/kg
- Mixed-layer CIN
- -251 J/kg
- Mixed-layer LCL
- 1561 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 41 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 132345 SVRMSO MTC093-140020- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 543 PM MDT FRI JUL 13 2001 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN SILVER BOW COUNTY IN WEST CENTRAL MONTANA * UNTIL 620 PM MDT * AT 543 PM MDT...RADAR INDICATED A SEVERE THUNDERSTORM 11 MILES SOUTHWEST OF DIVIDE...OR 30 MILES SOUTHWEST OF BUTTE...MOVING EAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE... 3 MILES SOUTHEAST OF DIVIDE AT 555 PM MDT LARGE HAIL IS LIKELY WITH THIS SEVERE THUNDERSTORM. DAMAGING WINDS IN EXCESS OF 55 MPH ARE POSSIBLE...ALONG WITH FREQUENT LIGHTNIKNG 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 4572 11313 4555 11305 4569 11223 4593 11233
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 13, 2:30 PM MDT, 3 hours 13 minutes earlier.
Area forecast discussion, Jul 13, 2:30 PM MDT, 3 hours 13 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 230 PM MDT FRI JUL 13 2001 .SHORT TERM...MOIST SOUTHWEST FLOW OVER THE CWA TONIGHT. SHOWERS/THUNDERSTORMS FIRING OFF ACROSS THE SOUTHERN ZONES THIS AFTERNOON. THUNDERSTORMS ARE INCREASING ACROSS WESTERN MONTANA AND NORTH CENTRAL IDAHO THIS AFTERNOON. LARGE AMOUNT OF MOISTURE IS MOVING UP FROM THE SOUTHWEST AND SHOULD SUPPORT STRONG THUNDERSTORMS. ON SATURDAY THE UPPER LEVEL FLOW BECOMES MORE WESTERLY AND A LITTLE MORE STABLE...SO HAVE DECREASED THE POPS TO A SLIGHT CHANCE. ON SUNDAY A SYSTEM FROM THE PACIFIC NORTHWEST MOVES CLOSER AND BRINGS A BETTER CHANCE OF SHOWERS BY AFTERNOON. KOLATA .EXTENDED...MODELS IN GOOD AGREEMENT FOR EXTENDED. PATTERN STAYS CONSISTENT WITH UPPER TROF OVER THE PAC NORTHWEST AND SOUTHWEST FLOW OVER CWA. DAYS 3 THRU 5 COOLER WITH CLOUDS AND SHOWERS. UPPER LOW BEGINS TO MOVE ACROSS THE AREA ON WEDNESDAY. DRIER CONDITIONS FOR DAYS 6&7 AS SFC HIGH BUILDS IN. TAD OF A WARM UP ON THURSDAY AND FRIDAY. KPB .MSO...SVR THUNDERSTORM WATCH UNTIL 7 PM MDT.
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 6:16 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 44 min |
| Jul 13, 2:32 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 33 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.