Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 3, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at May 28, 2001, 5:47 PM MDT for Granite County, Powell County, Montana. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 28, 2001, 5:47 PM MDT (23:47 UTC)
- Expired
- May 28, 2001, 6:45 PM MDT
- In force
- 58 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
Counties Granite County, MT, Powell County, MT
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 11.8 hours before the alert went out and 217 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
- 1523 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 104 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 282349 SVRMSO MTC039-077-290045- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 547 PM MDT MON MAY 28 2001 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL GRANITE COUNTY IN WEST CENTRAL MONTANA EXTREME WEST CENTRAL POWELL COUNTY IN WEST CENTRAL MONTANA * UNTIL 645 PM MDT * AT 547 PM MDT...RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES SOUTH OF NIMROD...OR 16 MILES SOUTHWEST OF DRUMMOND...MOVING NORTH AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE... OVER NIMROD...6 MILES WEST OF BEARMOUTH AT 600 PM MDT 6 MILES WEST OF GARNET AT 620 PM MDT LARGE HAI L IS LIKELY WITH THIS SEVERE THUNDERSTORM. ...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.
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 May 28, 2:30 PM MDT, 3 hours 17 minutes earlier.
Area forecast discussion, May 28, 2:30 PM MDT, 3 hours 17 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 230 PM MDT MON MAY 28 2001 TROUGH MOVING INTO THE CWA EARLY THIS AFTERNOON. HAVE SEEN LITTLE TO NO PRECIP ASSOCIATED WITH THE TROUGH AS IT HAS BEEN MOVING ACROSS WA/OR. WILL KEEP A SLIGHT CHANCE OF SHOWERS IN FOR TONIGHT AS THE TROUGH MOVES THROUGH THE AREA. WILL CONFINE THE MENTION OF THUNDERSTORMS TO SOUTHWESTERN MONTANA. ON TUESDAY THE TROUGH HAS MOVED TO THE EAST AS THE UPPER LEVEL FLOW TURNS TO WESTERLY. AFTER SOME LINGERING MORNING SHOWERS...WILL GO DRY AND COOLER TUESDAY AND TUESDAY NIGHT. ON WEDNESDAY THE CWA IS IN A TRANSITION WITH THE BUILDING OF A RIDGE. SOME WARM AIR ADVECTION INTO THE AREA COULD PRODUCE A FEW SHOWERS IN THE NORTH BUT WILL KEEP POPS LOW FOR NOW. KOLATA EXTENDED...GOOD MODEL AGREEMENT FOR HIGHER CONFIDENCE FORECAST TODAY. RIDGE BUILDS ACROSS THE NORTHERN ROCKIES ON THURSDAY WITH WARM AIR MAKING A RETURN. THE RIDGE AXIS SHIFTS TO THE EAST ON FRIDAY WITH INCREASING SOUTHWEST FLOW ALOFT OVER WESTERN MT. INSTABILITY ALONG A PAC FRONT SO WILL KEEP A MENTION OF THUNDERSTORMS FRIDAY AFTERNOON. COOLER AIR SLIDES INTO WESTERN MT ON SATURDAY WITH A PRESSURE GRADIENT OVER THE REGION. A CUTOFF UPPER LOW MOVES INTO THE PAC NORTHWEST SUNDAY REINFORCING COOL AIR OVER THE AREA. MOISTURE DOES NOT LOOK TOO GREAT AT THIS POINT BUT THE PATTERN FAVORS AFTERNOON SHOWERS AND BELOW NORMAL TEMPERATURES SUNDAY AND MONDAY. BOLDT
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 3:35 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 25 min |
| May 28, 5:18 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Powell | 42 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.