Alert archive / Montana / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 13, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 21, 2002, 8:08 PM MDT for Cascade County, Montana. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 21, 2002, 8:08 PM MDT (02:08 UTC)
- Expired
- Jun 21, 2002, 8:45 PM MDT
- In force
- 37 min
- Issued by
- NWS Great Falls, MT
- Area
- Counties, with a storm outline in the text
County Cascade County, MT
The radar
The Great Falls radar (KTFX), 40 km from the middle of the area, began a volume at 02:11 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, 2.1 hours before the alert went out and 72 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
- 354 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 2291 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 182 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS55 KTFX 220208 CCA
SVRTFX
MTC013-220245-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTION
NATIONAL WEATHER SERVICE GREAT FALLS MT
801 PM MDT FRI JUN 21 2002
THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTH CENTRAL CASCADE COUNTY IN CENTRAL MONTANA
* UNTIL 845 PM MDT
* AT 800 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM OVER EXTREME SOUTHWEST CASCADE COUNTY...OR
ABOUT 22 MILES SOUTH OF CASCADE...MOVING NORTHEAST AT 20 MPH.
* THE SEVERE THUNDERSTORM WILL BE REMAIN OVER...
RURAL AREAS OF CASCADE COUNTY THROUGH 845 PM.
HAIL UP TO ONE INCH AND WINDS TO 60 MPH ARE POSSIBLE WITH THIS STORM.
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 4732 11130 4717 11107 4701 11130 4701 11154
4691 11156 4698 11173The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 7:39 PM MDT | Severe Thunderstorm Warning | TFX | Jefferson | 36 min |
| Jun 21, 7:45 PM MDT | Severe Thunderstorm Warning | TFX | Jefferson | 30 min |
| Jun 21, 7:59 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater | 31 min |
| Jun 21, 8:03 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 42 min |
| Jun 21, 8:07 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 23 min |
| Jun 21, 8:28 PM MDT | Severe Thunderstorm Warning | TFX | Meagher | 32 min |
| Jun 21, 8:58 PM MDT | Severe Thunderstorm Warning | TFX | Meagher | 47 min |
| Jun 21, 9:11 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Meagher | 64 min |
| Jun 21, 9:57 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 48 min |
| Jun 22, 2:49 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 26 min |
| Jun 22, 3:20 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 55 min |
| Jun 22, 4:19 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 41 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2002Every severe thunderstorm warning in 2002
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.