Alert archive / Montana / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 113, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Aug 20, 2002, 8:24 PM MDT for Judith Basin 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 as issued.
The facts
- Issued
- Aug 20, 2002, 8:24 PM MDT (02:24 UTC)
- Expired
- Aug 20, 2002, 9:00 PM MDT
- In force
- 36 min
- Issued by
- NWS Great Falls, MT
- Area
- Counties, with a storm outline in the text
County Judith Basin County, MT
The radar
The Great Falls radar (KTFX), 114 km from the middle of the area, began a volume at 02:23 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, 2.4 hours before the alert went out and 77 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
- 87 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 2116 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 200 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
966
WUUS55 KTFX 210224
SVRTFX
MTC045-210300-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
823 PM MDT TUE AUG 20 2002
THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN JUDITH BASIN COUNTY IN CENTRAL MONTANA
* UNTIL 900 PM MDT
* AT 818 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM OVER EXTREME SOUTH CENTRAL JUDITH BASIN
COUNTY...OR ABOUT 28 MILES NORTHEAST OF WHITE SULPHUR SPRINGS...
MOVING NORTHEAST AT 35 MPH.
* THE SEVERE THUNDERSTORM WILL REMAIN OVER...RURAL SOUTHERN JUDITH
BASIN COUNTY.
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 4682 11055 4669 11038 4678 10983 4689 10986
4693 11003The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 6:55 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Meagher | 50 min |
| Aug 20, 8:02 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 58 min |
| Aug 20, 8:58 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 62 min |
| Aug 21, 3:04 PM MDT | Severe Thunderstorm Warning | TFX | Jefferson, Madison | 56 min |
| Aug 21, 4:21 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 39 min |
| Aug 21, 4:46 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 44 min |
| Aug 21, 5:13 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead | 47 min |
| Aug 21, 5:15 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead | 45 min |
| Aug 21, 5:30 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 60 min |
| Aug 21, 5:43 PM MDT | Severe Thunderstorm Warning | TFX | Madison | 47 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.