Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 10, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 11, 2001, 6:10 PM MDT for Missoula County, Montana. It was in force for 50 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 11, 2001, 6:10 PM MDT (00:10 UTC)
- Expired
- Jul 11, 2001, 7:00 PM MDT
- In force
- 50 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Missoula County, MT
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 0.2 hours before the alert went out and 225 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
- 2177 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- -13 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 120012 SVRMSO MTC063-120100- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 610 PM MDT WED JUL 11 2001 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN MISSOULA COUNTY IN WEST CENTRAL MONTANA * UNTIL 700 PM MDT * AT 610 PM MDT...SPOTTERS REPORTED A SEVERE THUNDERSTORM 5 MILES SOUTHWEST OF CLINTON...NEAR MILLER CREEK IN SOUTH MISSOULA... MOVING NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE... OVER EAST MISSOULA AT 615 PM MDT OVER POTOMAC AT 630 PM MDT DAMAGING WINDS IN EXCESS OF 55 MPH ARE LIKELY WITH THIS SEVERE THUNDERSTORM. 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 4677 11396 4664 11378 4694 11326 4712 11352
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 11, 2:31 PM MDT, 3 hours 39 minutes earlier.
Area forecast discussion, Jul 11, 2:31 PM MDT, 3 hours 39 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 231 PM MDT WED JUL 11 2001 .SHORT TERM...MSX RADAR SHOWS SCATTERED SHOWERS AND THUNDERSTORMS FORMING ACROSS LEMHI COUNTY THIS AFTERNOON. SATELLITE VISIBLE IMAGERY AND SURFACE INDICATED SOME CU BUILDING UP ALONG THE WESTERN BORDER OF THE CWA AND TO THE NORTH. HIGH PRESSURE REMAINS OVER CENTRAL U.S. THROUGH THE FORECAST PERIOD WITH A SOUTHWEST FLOW OVER THE CWA. WEAK SHORT WAVES CONTINUE TO MOVE IN THE FLOW AND ACROSS THE CWA EACH DAY. STILL NOT TOO IMPRESSED BY ANY ON THE WAVES MOVING ACROSS THE AREA...SO WILL KEEP THE POPS IN THE LOW CHANCE CATEGORY. BY FRIDAY THE TROUGH OFF THE NORTHWEST PACIFIC COAST MOVES CLOSER AND DEEPENS. TEMPERATURES COOL A FEW DEGREES THURSDAY FROM TODAY AND THEN A FEW MORE DEGREES ON FRIDAY. KOLATA .EXTENDED...MODELS IN GOOD AGREEMENT THROUGH EARLY SUNDAY WITH THE AREA IN SOUTHWEST FLOW WITH A CUT OFF LOW DIGGING DOWN THE WEST COAST INTO WASHINGTON. LATER SUNDAY INTO WEDNESDAY MRF/AVN MOVE DEEPENING UPPER LOW INTO WESTERN OREGON WITH MRF MOVING IT OFF THE COAST BY WEDNESDAY. ECMWF ON THE OTHER HAND WEAKENS THIS LOW MONDAY AND EJECTS IT NORTHEAST INTO CENTRAL CANADA. SINCE AVN PREFERRED SHORT/MID TERM MODEL AND IN MORE AGREEMENT WITH MRF WILL USE THEIR SOLUTION. ALSO MRF HAS BEEN MORE CONSISTENT THAN THE ECMWF. TEMPERATURES WILL BE COOLER THROUGHOUT THE PERIOD...BUT NOT AS COOL AS PREVIOUS MODELS INDICATE OR GUIDANCE. A CHANCE OF SHOWERS/THUNDERSTORMS EXPECTED EACH DAY...EXCEPT SATURDAY WHERE THE NORTH MAY ESCAPE ANY ACTIVITY. BELTZ .MSO...NONE.
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 2:23 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 52 min |
| Jul 12, 4:36 PM MDT | Flash Flood Warning | MSO | Granite, Ravalli | 114 min |
| Jul 12, 5:16 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Granite, Powell | 59 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.