Alert archive / Montana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 13, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jul 2, 1998, 8:28 PM MDT for Broadwater County, Jefferson County, Montana. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 2, 1998, 8:28 PM MDT (02:28 UTC)
- Expired
- Jul 2, 1998, 9:15 PM MDT
- In force
- 47 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
Counties Broadwater County, MT, Jefferson County, MT
The radar
The Great Falls radar (KTFX), 139 km from the middle of the area, began a volume at 02:31 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, 2.5 hours before the alert went out and 163 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
- 42 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 1450 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
302 WUUS1 KGTF 030230 RRA SVRGTF MTC043-007-030315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 828 PM MDT THU JUL 2 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN JEFFERSON COUNTY AND SOUTHERN BROADWATER COUNTY IN SOUTHWESTERN MONTANA * UNTIL 915 PM MDT * AT 824 PM MDT...DOPPLER RADAR AT GREAT FALLS INDICATED A SEVERE THUNDERSTORM 21 MILES SOUTHEAST OF BOULDER OR 12 MILES NORTHEAST OF CARDWELL MOVING NORTHEAST AT 20 MPH. ALSO AT 800 PM MDT A CAMPER AT PIPESTONE CAMPGROUND...22 MILES EAST OF BUTTE REPORTED HALF INCH HAIL...AND WIND GUSTS OF 40 TO 45 MPH. * THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS.
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.
In the hours before
Special weather statement, Jul 2, 5:04 PM MDT, 3 hours 24 minutes before
MTZALL-031200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 500 PM MDT THU JULY 2 1998 ...FOURTH OF JULY WEEKEND FORECAST... A PACIFIC LOW PRESSURE SYSTEM WILL CONTINUE MOVING OVER THE PACIFIC NORTHWEST THIS WEEKEND SENDING MOIST...UNSTABLE AIR OVER MONTANA. EAST OF THE DIVIDE... FOURTH OF JULY...SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS. MORNING LOWS IN THE 50S AND LOWER 60S. HIGHS IN THE 70S NORTHWEST AND 80S SOUTH AND EAST. THE REMAINDER OF THE FOURTH OF JULY WEEKEND...SHOWERS LIKELY WEST AND NORTH...AND A LITTLE COOLER. SOUTH AND EAST... SCATTERED SHOWERS AND AFTERNOON THUNDERSTORMS. LOWS IN THE 50S TO LOWER 60S. HIGHS 65 TO 75 WEST AND NORTH...OTHERWISE IN THE MID 70S TO 80S. WEST OF THE DIVIDE... FOURTH OF JULY....COOLER WITH A CHANCE OF SHOWERS AND AFTERNOON THUNDERSTORMS. MORNING LOWS 50 TO 60. HIGHS 70 TO 80. FOR THE REMAINDER OF THE FOURTH OF JULY WEEKEND...A CHANCE OF SHOWERS AND AFTERNOON THUNDERSTORMS. LOWS UPPER 40S TO MID 50S. HIGHS 70 TO 80.
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 9:02 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 58 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.