Alert archive / Utah / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 34, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jun 25, 1998, 7:47 PM MDT for Box Elder County, Utah. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Jun 25, 1998, 7:47 PM MDT (01:47 UTC)
- Expired
- Jun 25, 1998, 8:30 PM MDT
- In force
- 43 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Box Elder County, UT
The radar
The Salt Lake City radar (KMTX), 75 km from the middle of the area, began a volume at 01:48 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
Elko, NV (KLKN), launched 00:00Z, 1.8 hours before the alert went out and 98 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
- 376 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 2469 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
983
WUUS1 KSLC 260149 RRA
SVRSLC
UTC003-260230-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
747 PM MDT THU JUN 25 1998
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL BOX ELDER COUNTY IN UTAH
* UNTIL 830 PM MDT
* AT 736 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 38 MILES SOUTHWEST OF KELTON...OR ABOUT 39
MILES SOUTH OF PARK VALLEY...MOVING NORTHEAST AT 45 MILES PER
HOUR.
* OTHER LOCATIONS IN THE WARNING INCLUDE KELTON
* SEVERE THUNDERSTORM WILL BE...
24 MILES SOUTHWEST OF KELTON AT 755 PM MDT
16 MILES SOUTH OF KELTON AT 805 PM MDT
6 MILES SOUTH OF KELTON AT 820 PM MDT
VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE
IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A
SUBSTANTIAL SHELTER.
REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN SALT LAKE CITY.
LAT...LON 4129 11357 4117 11341 4161 11279 4187 11323The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 25, 6:22 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 38 min |
| Jun 25, 6:48 PM MDT | Severe Thunderstorm Warning | SLC | Tooele | 42 min |
| Jun 25, 7:17 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder, Tooele | 28 min |
| Jun 25, 8:23 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 52 min |
Nearby
Severe Thunderstorm Warnings in Utah, 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.