Alert archive / Montana / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 22, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jul 1, 2000, 8:15 PM MDT for Blaine 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 counties it named.
The facts
- Issued
- Jul 1, 2000, 8:15 PM MDT (02:15 UTC)
- Expired
- Jul 1, 2000, 9:00 PM MDT
- In force
- 45 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
County Blaine County, MT
The radar
The Glasgow radar (KGGW), 174 km from the middle of the area, began a volume at 02:14 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 00:00Z, 2.3 hours before the alert went out and 163 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
- 497 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 2161 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.0
The text
As transmitted, in the capitals the NWS used until 2016.
848 WUUS55 KTFX 020218 SVRGTF MTC005-020300- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 815 PM MDT SAT JUL 1 2000 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN BLAINE COUNTY IN NORTH CENTRAL MONTANA * UNTIL 900 PM MDT * AT 812 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 27 MILES NORTHWEST OF TURNER...OR ABOUT 42 MILES NORTHEAST OF CHINOOK...MOVING SOUTHEAST AT 20 MPH. VERY LARGE HAIL AND STRONG...GUSTY WINDS ARE POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A SUBSTANTIAL SHELTER. 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 4914 10900 4848 10865 4872 10781 4919 10861
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 1, 8:10 PM MDT, 5 minutes earlier.
Area forecast discussion, Jul 1, 8:10 PM MDT, 5 minutes before
SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREAT FALLS MT 810 PM MDT SAT JUL 1 2000 ...WILL UPDATE ZONE AND STATE FORECASTS BY 900 PM... DEEPENING UPPER TROUGH OVER PAC NW WITH STATE UNDER SWLY FLOW ALOFT. SATELLITE IMAGERY SHOWS MOISTURE CONTINUING TO STREAM INTO STATE. QUITE A NUMBER OF THUNDERSTORMS HAVE SWEPT FROM SW MT NEWD INTO THE NORTH CENTRAL PART OF THE STATE THIS EVENING. ALTHOUGH NO REPORTS OF SEVERE WX WERE RECEIVED MANY LOCATIONS RECEIVED BRIEF HEAVY RAIN WITH THE STORMS. THIS IS IN KEEPING WITH 00Z TFX SOUNDING WHICH INDICATES A LIFTED INDEX OF -5 AND AN INCH OF PRECIPITABLE WATER. BRUNT OF CONVECTIVE ACTIVITY IS NOW OVER ERN PORTION GTF CWFA. SOME STORMS ARE LINGERING FROM NORTH OF DILLON TO S OF HELENA TO ALONG THE ROCKY MOUNTAIN FRONT THOUGH. EXPECT MOST OF THESE SRN STORMS TO DIE OUT OVER NEXT COUPLE OF HOURS. HOWEVER STORMS ALONG THE HI-LINE MAY LINGER UNTIL AROUND MIDNIGHT. WILL UPDATE ZONE AND STATE FORECASTS TO FRESHEN WORDING. OTHERWISE CURRENT FORECAST HANDLES SITUATION WELL. BRITTON EXTENDED...MEAN UPPER TROUGH REMAINS IN PLACE OVER ERN PAC AND WRN US THROUGH EXTENDED PERIOD. UPPER LOW OVER SRN ALBERTA DRAGS TROUGH AND ASSOCIATED COLD FRONT ACROSS STATE ON TUESDAY. THIS WILL KEEP GTF CWFA UNDER SWLY FLOW ALOFT AND WILL PRODUCE A CHANCE OF SHOWERS AND THUNDERSTORMS ON THE FOURTH OF JULY. UPPER LOW SPLITS WITH ONE LOW TO MOVE SLOWLY ACROSS SRN PRAIRIE PROVINCES WHILE THE OTHER LOW WOBBLES OVR W COAST. HEIGHTS RISE A LITTLE WEDNESDAY AND THURSDAY AS WEAK... NEGATIVELY TILTED RIDGE PUSHES NWWD BETWEEN TWO UPPER LOWS RESULTING IN WARMING TREND BEGINNING WED. WITH WEAK SFC LOW PRESSURE OVER AREA WED AND THU AS WELL AS RESIDUAL MOISTURE FROM PREVIOUS SYSTEM WILL KEEP MENTION OF ISOLATED SHOWERS AND THUNDERSTORMS BOTH DAYS. BRITTON CCF NUMBERS GTF WB 054/075 050/072 048 044643 CTB EN 049/072 046/068 044 0/42322 HLN WE 056/076 054/073 049 046655 BZN TW 052/078 052/073 047 046666 WEY TT 045/073 044/073 041 046666 DLN TW 050/078 048/073 045 045666 HVR WB 055/078 052/075 051 043533 LWT WB 052/078 050/074 045 046664
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 4:12 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 33 min |
| Jul 2, 4:20 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 25 min |
| Jul 2, 4:59 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 31 min |
| Jul 2, 5:29 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 46 min |
| Jul 2, 5:32 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 43 min |
| Jul 2, 5:34 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 41 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.