Alert archive / Montana / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 4, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 5, 2000, 8:39 PM MDT for Chouteau County, Montana. It was in force for 36 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
- Jun 5, 2000, 8:39 PM MDT (02:39 UTC)
- Expired
- Jun 5, 2000, 9:15 PM MDT
- In force
- 36 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), 55 km from the middle of the area, began a volume at 02:43 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 5, 7:15 PM MDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 2.7 hours before the alert went out and 54 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
- 1296 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 2824 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.9
The text
As transmitted, in the capitals the NWS used until 2016.
048 WUUS55 KTFX 060241 SVRGTF MTC015-060315- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 839 PM MDT MON JUN 5 2000 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WEST CENTRAL...AND SOUTHWEST CHOUTEAU COUNTY IN NORTH CENTRAL MONTANA. THIS INCLUDES THE CITY OF FORT BENTON * UNTIL 915 PM MDT * AT 823 PM MDT...A SEVERE THUNDERSTORM WAS REPORTED 38 MILES WEST...SOUTHWEST OF FORT BENTON...OR ABOUT 20 MILES NORTHWEST OF GREAT FALLS...MOVING NORTHEAST AT 45 MPH. THIS STORM HAS A HISTORY OF PRODUCING HIGH WINDS. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN GREAT FALLS. LAT...LON 4787 11130 4773 11112 4782 11027 4808 11087 $$ BRITTON/BRUSDA NNNN
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 Jun 5, 3:00 PM MDT, 5 hours 39 minutes earlier.
Area forecast discussion, Jun 5, 3:00 PM MDT, 5 hours 39 minutes before
SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREAT FALLS MT 300 PM MDT MON JUN 5 2000 HIGH PRES RDG MOVG INTO ERN MT BY 00Z...WHILE SHORT WAVE TROF OVER WRN MT MOVES INTO GTF CWA THIS EVE. GOOD DYNAMICS WITH THIS SHORT WAVE...CAPE VALUES NEAR 1400 J/KG OVER NW GTF CWA...LI BTN -2 AND -4 DEG C...GOOD Q VECTOR CONV. FLOW ALF BECMG SWLY WITH DIFFLUENT FLOW AT H5 LEVEL. SHORT WAVE MOVES INTO ERN MT OVRNGHT AND WKN AS UPPER LEVEL RDG BLDS OVER THE AREA LATER TONIGHT THRU WED AS PER MDLS. E TO SELY FLOW AT LOW LEVELS CONTS E OF CONTDVD...AS SURFACE LOW WITH ASC COLD FRONT OVER ERN WA/NRN ID MOVES E TO KGTF BY 06Z. DEWPOINTS MNLY IN THE 45 TO 53 DEG RANGE FOR LOW LEVEL MOISTURE AS PER RAOB SOUNDING. WITH ALL OF THIS IN MIND...GOING FOR SCT EVE T-STORMS...SOME MAY CONTAIN STRONG GUSTY WINDS AND HAIL...DESPITE A LACK OF MOISTURE IN MID AND HIGH LEVELS. TEMPERATURES WILL BE A FEW DEGREES COOLER TUES AS PAC SFC HIGH BUILDS INTO WRN AND CNTRL MT...TEMPERATURES BOUND BACK UP WEDNESDAY AS UPR LEVEL RDG CONTS TO AMPLIFY. WILLIAMSON EXTENDED PERIOD...CONDITIONS LOOK TO BE UNSETTLED THROUGH 3 TO 5 DAY PERIOD WITH STATE UNDER SWLY FLOW ALOFT THRU PERIOD. ENSEMBLES SHOW MEAN TROUGH OVER ERN PAC THURSDAY...MOVING INTO WRN MT LATE FRIDAY. COLD FRONT AND ASSOCIATED SURFACE LOW MOVE ACROSS STATE THURSDAY NIGHT. THICKNESSES DROP SIGNIFICANTLY FRIDAY FOR COOLER TEMPERATURES INTO SATURDAY. WITH TROUGH OVER AREA THRU MUCH OF PERIOD...BELIEVE MENTION OF SCATTERED SHOWERS AND ISOLATED AFTERNOON THUNDERSTORMS WARRANTED. BRITTON CCF NUMBERS GTF BB 050/077 048/084 052 203111 CTB BB 046/073 046/081 048 204111 HLN BB 050/080 052/085 053 204111 BZN BB 044/080 050/084 048 204111 WEY BB 036/074 038/077 036 204112 DLN BB 046/076 047/081 046 203111 HVR BB 052/080 055/085 054 204111 LWT BB 046/075 048/081 050 203111
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 5, 7:14 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark, Teton | 31 min |
| Jun 5, 7:56 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Teton | 49 min |
| Jun 5, 8:43 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Pondera, Toole | 32 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.