Alert archive / Montana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 95, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Sep 9, 1998, 3:50 PM MDT for Blaine County, Hill County, Montana. It was in force for 60 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
- Sep 9, 1998, 3:50 PM MDT (21:50 UTC)
- Expired
- Sep 9, 1998, 4:50 PM MDT
- In force
- 60 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
Counties Blaine County, MT, Hill County, MT
The radar
The Great Falls radar (KTFX), 182 km from the middle of the area, began a volume at 21:50 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 9, 4:04 PM MDT | Thunderstorm Wind 55 | (Hvr)Havre City-Co A, 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 nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 9.8 hours before the alert went out and 143 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1709 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
435 WUUS1 KGTF 092151 RRA SVRGTF MTC005-041-051-092250- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 350 PM MDT WED SEP 9 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BLAINE COUNTY IN NORTH CENTRAL MONTANA HILL COUNTY IN NORTH CENTRAL MONTANA LIBERTY COUNTY IN NORTH CENTRAL MONTANA * UNTIL 450 PM MDT *DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS AT 340 PM MDT EXTENDDING FROM SOUTHERN LINERTY COUNTY...ACROSS SOUTHERN HILL COUNTY AND ALONG THE CHOUTEAU-BLAINE COUNTY BORDER...MOVING TOWARDS THE NORTHEAST AT 35 TO 40 MPH. WIND GUSTS NEAR 70 MPH CAN BE EXPECTED WITH THESE THUNDERSTORMS ALONG WITH BRIEF HEAVY RAIN AND SMALL HAIL. *THIS LINE OF THUNDERSTORMS PRODUCED WINDS IN EXCESS OF 60 MPH OVER CASCADE COUNTY EARLIER THIS AFTERNOON.
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 9, 2:03 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin, Meagher | 62 min |
| Sep 9, 2:03 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 62 min |
| Sep 9, 3:04 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 46 min |
| Sep 9, 3:50 PM MDT | Severe Thunderstorm Warning | TFX | Liberty | 60 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; radar from the NEXRAD Level II archive.