Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 35, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Aug 13, 2001, 4:08 PM MDT for Mineral County, Missoula County, Montana. It was in force for 52 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 13, 2001, 4:08 PM MDT (22:08 UTC)
- Expired
- Aug 13, 2001, 5:00 PM MDT
- In force
- 52 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Mineral County, MT, Missoula County, MT
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 10.1 hours before the alert went out and 159 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
- 111 J/kg
- Mixed-layer CIN
- -212 J/kg
- Mixed-layer LCL
- 2980 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
262 WUUS55 KMSO 132208 SVRMSO MTC061-063-132300- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 408 PM MDT MON AUG 13 2001 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN MINERAL COUNTY IN WEST CENTRAL MONTANA WESTERN MISSOULA COUNTY IN WEST CENTRAL MONTANA * UNTIL 500 PM MDT * AT 408 PM MDT...RADAR INDICATED A SEVERE THUNDERSTORM OVER TARKIO...OR 14 MILES SOUTHEAST OF SUPERIOR...MOVING EAST AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE... 3 MILES NORTH OF ALBERTON AT 430 PM MDT 3 MILES NORTHWEST OF FRENCHTOWN AT 500 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. LAT...LON 4714 11475 4696 11475 4692 11416 4711 11419 SULLIVAN
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 13, 2:00 PM MDT, 2 hours 8 minutes earlier.
Area forecast discussion, Aug 13, 2:00 PM MDT, 2 hours 8 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
200 PM MDT MON AUG 13 2001
.SHORT TERM...SHORTWAVE MOVING ACROSS NORTHERN IDAHO WILL CONTINUE
TO KEEP NORTH CENTRAL IDAHO AND NORTHWEST MONTANA WITH THE THREAT OF
THUNDERSTORMS UNTIL EARLY THIS EVENING. ANOTHER WAVE MOVING ACROSS
THE SOUTH SHOULD ALLOW SCATTERED THUNDERSTORMS TO DEVELOP AND MOVE
ACROSS THESE AREAS. MOISTURE REMAINS VERY LIMITED AND BASED ON
INVERTED V TYPE SOUNDING STRONG GUSTY WINDS ARE THE MAIN THREAT...
ALONG WITH LIGHTNING. RIDGE AXIS BUILDS OVER IDAHO ON TUESDAY WITH
WEAK NORTHERLY FLOW OVER THE EASTERN HALF OF THE FORECAST AREA.
GENERAL INSTABILITY NOTED THROUGHOUT THE AREA TUESDAY INTO WEDNESDAY
AS RIDGE FURTHER AMPLIFIES. MOISTURE AND DYNAMICS VERY WEAK BOTH DAYS
SO WILL ONLY MENTION A SLIGHT CHANCE OF CONVECTION. WEAK NORTHERLY
FLOW AND BREAKDOWN OF THERMAL RIDGE WILL ALLOW TEMPERATURES TO BE A
FEW DEGREES COOLER TUESDAY...BUT TEMPERATURES REBOUND ON WEDNESDAY AS
THERMAL TROUGH AND RIDGE RE-ESTABLISH THEMSELVES. BELTZ
.EXTENDED...RIDGE LINE ALOFT RIGHT OVER THE FORECAST AREA ON THURSDAY
FOR DRY CONDITIONS...BEGINS TO SHIFT EAST OVER CENTRAL MT FRIDAY FOR
A SLIGHT CHANCE OF LATE DAY THUNDERSTORMS AND THE WARMEST DAY. OVER
THE WEEKEND...THE OFFSHORE TROUGH BEGINS TO MOVE INLAND WITH WESTERLY
FLOW ALOFT. COOLER TEMPS ARE EXPECTED WITH BEST INSTABILITY BEING TO
THE SOUTH OVER LEMHI AND SILVER BOW COUNTIES. FELSCH
.MSO...RED FLAG WARNING THROUGH THIS EVENING FOR DRY LIGHTNING AND
LOW HUMIDITIES ALL FIRE ZONES 102 THROUGH 111.The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 2:53 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 52 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.