Alert archive / Montana / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 61, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jul 8, 2000, 5:40 PM MDT for Chouteau County, Montana. It was in force for 35 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 8, 2000, 5:40 PM MDT (23:40 UTC)
- Expired
- Jul 8, 2000, 6:15 PM MDT
- In force
- 35 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Chouteau County, MT
The radar
The Great Falls radar (KTFX), 92 km from the middle of the area, began a volume at 23:43 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
Great_falls, MT (KTFX), launched 12:00Z, 11.7 hours before the alert went out and 38 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
- 2167 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
173 WUUS55 KTFX 082344 SVRGTF MTC015-090015- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 540 PM MDT SAT JUL 8 2000 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTH CENTRAL CHOUTEAU COUNTY IN NORTH CENTRAL MONTANA * UNTIL 615 PM MDT * AT 529 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES WEST OF SQUARE BUTTE...OR ABOUT 26 MILES NORTH OF STANFORD...MOVING NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... RURAL SOUTHERN CHOUTEAU COUNTY AT 550 PM MDT RURAL SOUTHEASTERN CHOUTEAU COUNTY AT 610 PM MDT REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN GREAT FALLS. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM MDT SATURDAY EVENING FOR WESTERN MONTANA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL MIDNIGHT MDT SUNDAY MORNING FOR WESTERN MONTANA. LAT...LON 4763 11044 4744 11019 4774 10984 4790 11007
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 Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 8, 3:00 PM MDT, 2 hours 40 minutes earlier.
Area forecast discussion, Jul 8, 3:00 PM MDT, 2 hours 40 minutes before
SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREAT FALLS MT 300 PM MDT SAT JUL 8 2000 WAITING FOR CONVECTION TO KICK OFF THIS AFTERNOON. DEW POINTS SLOWLY RISING AT THIS TIME WITH SATELLITE IMAGERY INDICATING CUMULUS DEVELOPING OVER SOUTHWEST MONTANA AS WELL AS OVER BELT MOUNTAINS. MESOETA TAKES SHORTWAVE NOW OVER IDAHO AND MOVES IT ACROSS CENTRAL MONTANA THIS EVENING AND EVENTUALLY INTO NORTHEAST MONTANA. STRONG OMEGA VALUES AS WELL AS GOOD CAPE AND HELICITY NUMBERS ALL POINT TO AN ACTIVE CONVECTIVE EVENING. LATEST MESOSCALE DISCUSSION INDICATES A WATCH BOX MAY BE FORTHCOMING WITHIN THE NEXT COUPLE OF HOURS AS SPC FIGURES ACTIVITY GEARING UP BY 22Z. CLOSED UPPER LOW AND ASSOCIATED TROF MOVE FURTHER EAST SUNDAY WITH AIRMASS OVER CWA REMAINING UNSTABLE. SHORTWAVES CONTINUE TO ROTATE OUT OF TROF FOR A CONTINUED CHANCE OF AFTERNOON CONVECTION. LOW BEGINS TO LIFT OUT MONDAY WITH AXIS OF TROF FINALLY PASSING OVER CWA. UNTIL THIS HAPPENS...WILL GO WITH SCATTERED THUNDERSTORMS EACH PERIOD. TEMPERATURES CHANGE LITTLE NEXT 48 HOURS ALTHOUGH...WILL DROP THEM A TAD FOR MONDAY. EMANUEL EXTENDED DISCUSSION...NEW LONG RANGE PROGS INDICATE UPPER TROUGH HAS WEAKENED CONSIDERABLY BY TUESDAY. UPPER RIDGE BUILDS INTO EASTERN MONTANA OR DAKOTAS WEDNESDAY AND THURSDAY. THIS INDICATES TEMPERATURES WILL RISE WITH LESS CHANCE OF THUNDERSTORMS IN 3 TO 5 DAY PERIOD. OARD CCF NUMBERS GTF TB 052/080 050/077 048 085333 CTB TB 048/076 046/073 045 084333 HLN TB 051/080 049/078 052 084333 BZN TB 047/082 045/078 048 084333 WEY TB 040/078 038/074 040 084444 DLN TB 046/082 043/078 046 083333 HVR TB 054/082 052/082 054 084433 LWT TB 050/080 047/077 048 086433
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 5:09 PM MDT | Tornado Warning | TFX | Lewis and Clark | 51 min |
| Jul 8, 5:50 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 25 min |
| Jul 8, 5:54 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 51 min |
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.