Alert archive / Montana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 45, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jul 4, 1998, 6:05 PM MDT for Pondera County, Teton County, Montana. It was in force for 65 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 4, 1998, 6:05 PM MDT (00:05 UTC)
- Expired
- Jul 4, 1998, 7:10 PM MDT
- In force
- 65 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
Counties Pondera County, MT, Teton County, MT
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 4, 7:15 PM MDT | Hail 1.75 | Brady, 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 4, 2:30 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 0.1 hours before the alert went out and 138 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
- 1001 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 1485 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
859 WUUS1 KGTF 050007 RRA SVRGTF MTC073-099-050110- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 605 PM MDT SAT JUL 4 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN PONDERA COUNTY IN NORTHWESTERN MONTANA EASTERN TETON COUNTY IN NORTHWESTERN MONTANA * UNTIL 710 PM MDT * AT 603 PM MDT... DOPPLER RADAR AT GREAT FALLS INDICATED A SEVERE THUNDERSTORM 9 MILES SOUTHWEST OF CONRAD OR 8 MILES WEST OF BRADY MOVING EAST AT 15 MPH. * SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE... CONRAD... BRADY AND COLLINS AREA.
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 6:00 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 65 min |
| Jul 4, 7:05 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Pondera | 60 min |
| Jul 4, 7:12 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 58 min |
| Jul 4, 9:31 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 64 min |
| Jul 5, 3:45 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 60 min |
| Jul 5, 4:15 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 45 min |
| Jul 5, 4:50 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 60 min |
| Jul 5, 5:00 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Toole | 65 min |
| Jul 5, 5:37 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 63 min |
Nearby
Severe Thunderstorm Warnings in Montana, 1998Every severe thunderstorm warning in 1998
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.