Alert archive / Montana / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 17, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Sep 1, 2000, 7:30 PM MDT for Granite County, Missoula County, Ravalli County, Montana. It was in force for 45 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
- Sep 1, 2000, 7:30 PM MDT (01:30 UTC)
- Expired
- Sep 1, 2000, 8:15 PM MDT
- In force
- 45 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Granite County, MT, Missoula County, MT, Ravalli County, MT
The radar
The Missoula radar (KMSX), 50 km from the middle of the area, began a volume at 01:33 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 1.5 hours before the alert went out and 222 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
- 1553 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 82 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 020133 COR SVRMSO MTC039-063-081-020215- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 733 PM MDT FRI SEP 1 2000 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN GRANITE COUNTY IN WEST CENTRAL MONTANA SOUTHEASTERN MISSOULA COUNTY IN WEST CENTRAL MONTANA NORTHEASTERN RAVALLI COUNTY IN WEST CENTRAL MONTANA * UNTIL 815 PM MDT * AT 730 PM MDT...RADAR INDICATED A SEVERE THUNDERSTORM OVER STEVENSVILLE...OR 15 MILES NORTH OF HAMILTON...MOVING NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL MOVE EAST OF FLORENCE AND OVER REMOTE AREAS. 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 4648 11426 4636 11407 4672 11345 4691 11373
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 Sep 1, 2:45 PM MDT, 4 hours 45 minutes earlier.
Area forecast discussion, Sep 1, 2:45 PM MDT, 4 hours 45 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 245 PM MDT FRI SEP 1 2000 WV AND IR SATELLITE IMAGERY SHOWS GOOD SHOT OF MOISTURE MOVING UP INTO THE CWA FROM THE SOUTHWEST THIS EVENING ON THE NOSE OF A JET SWINGING AROUND THE LOW OFF THE COAST. AIRMASS GETTING MORE UNSTABLE ACROSS THE CWA WITH SOME THUNDERSTORMS MOVING INTO THE SOUTHERN SECTIONS LATE THIS AFTERNOON...THESE WILL SPREAD ACROSS THE AREA THIS EVENING. LOW OFF VANCOUVER ISLAND DIGGING SLOWLY SOUTH WILL REMAIN WEST OF THE CWA THROUGH THE SHORT TERM FORECAST. NEXT STRONG SHORTWAVE SWINGS AROUND THE LOW DURING THE DAY ON SATURDAY AND INTO THE CWA FROM THE SOUTHWEST. THICKNESS VALUES FALL ON SATURDAY AND SUNDAY FOR COOLER TEMPERATURES EACH DAY. WEAKER SHORTWAVES CONTINUE ACROSS THE CWA ON SUNDAY AND WILL KEEP IN A MENTION OF SHOWERS. KOLATA EXTENDED...COOL UNSETTLED PATTERN TO CONTINUE AS UPPER LOW OPENS INTO BROAD TROUGH AND SLOWLY MOVES INLAND. TOUGH TO SORT OUT FINE DETAILS IN THIS SCENARIO AND MODELS SHOWING SOME INCONSISTENCY ON SPEED OF PROGRESSION. BOTTOM LINE IS LITTLE CHANGE IN THE WEATHER THROUGH WEDNESDAY...AND WILL BROADBRUSH CHANCE OF SHOWERS EACH DAY WITH NO REAL CHANGE IN TEMPERATURES. SULLIVAN
Nearby
Severe Thunderstorm Warnings in Montana, 2000Every severe thunderstorm warning in 2000
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; radar from the NEXRAD Level II archive.