Alert archive / Montana / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 56, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jul 5, 2000, 10:20 PM MDT for Blaine County, Montana. It was in force for 40 min. 1 report came from 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, with what was reported inside it.
The facts
- Issued
- Jul 5, 2000, 10:20 PM MDT (04:20 UTC)
- Expired
- Jul 5, 2000, 11:00 PM MDT
- In force
- 40 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Blaine County, MT
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 5, 10:30 PM MDT | Hail 1.25 | Landusky, MT |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 5, 6:30 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 4.3 hours before the alert went out and 162 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
- 1390 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 1773 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 4.6
The text
As transmitted, in the capitals the NWS used until 2016.
540 WUUS55 KTFX 060420 SVRGTF MTC005-060445- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 1020 PM MDT WED JUL 5 2000 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN BLAINE COUNTY IN NORTH CENTRAL MONTANA * UNTIL 1100 PM MDT * AT 1010 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES WEST OF HAYS...OR ABOUT 48 MILES SOUTH OF CHINOOK...MOVING EAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... OVER HAYS AT 1035 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 MIDNIGHT MDT THURSDAY MORNING FOR NORTHWESTERN MONTANA. LAT...LON 4799 10903 4782 10894 4795 10831 4816 10842
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 5, 9:00 PM MDT, 1 hour 20 minutes earlier.
Area forecast discussion, Jul 5, 9:00 PM MDT, 1 hour 20 minutes before
SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREAT FALLS MT 900 PM MDT WED JUL 5 2000 WORKING SEVERE WEATHER TONIGHT...HAVE ALREADY UPDATED A NUMBER OF ZONES. OARD CCF NUMBERS GTF WB 050/073 048/082 052 084621 CTB WB 045/070 045/078 048 084621 HLN WB 048/075 050/084 053 085621 BZN WB 048/076 050/084 050 085622 WEY WB 038/070 038/077 038 085622 DLN WB 045/075 047/083 049 085521 HVR WB 048/080 050/085 054 083631 LWT TB 048/075 050/081 050 085621
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 7:29 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin | 31 min |
| Jul 5, 8:09 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 36 min |
| Jul 5, 8:16 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Meagher | 29 min |
| Jul 5, 8:27 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin | 33 min |
| Jul 5, 8:43 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 32 min |
| Jul 5, 8:50 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin | 25 min |
| Jul 5, 8:54 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 36 min |
| Jul 5, 9:11 PM MDT | Tornado Warning | TFX | Cascade, Judith Basin | 34 min |
| Jul 5, 9:17 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Fergus | 28 min |
| Jul 5, 9:39 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 36 min |
| Jul 5, 9:44 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 31 min |
| Jul 5, 10:16 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 29 min |
| Jul 5, 10:46 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 59 min |
| Jul 5, 11:07 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 38 min |
| Jul 6, 5:03 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Meagher | 42 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.