Alert archive / Utah / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 108, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Sep 11, 1997, 2:38 PM MDT for Cache County, Utah; Franklin County, Idaho. 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
- Sep 11, 1997, 2:38 PM MDT (20:38 UTC)
- Expired
- Sep 11, 1997, 3:25 PM MDT
- In force
- 47 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
Counties Franklin County, ID, Cache County, UT
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 11, 1:45 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 12:00Z, 8.6 hours before the alert went out and 131 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
- 262 J/kg
- Mixed-layer CIN
- -144 J/kg
- Mixed-layer LCL
- 2379 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 123 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSLC 112039 RRA SVRSLC IDC041-UTC005-112125- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 238 PM MDT THU SEP 11 1997 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 325 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTHWESTERN UTAH ...EXTREME NORTHWESTERN CACHE COUNTY IN SOUTHEASTERN IDAHO ...SOUTHERN FRANKLIN COUNTY AT 235 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER RADAR OVER EXTREME NORTHWEST CACHE COUNTY 10 MILES SOUTHWEST OF FRANKLIN OR 7 MILES SOUTHWEST OF FAIRVIEW MOVING NORTHEAST AT 40 MPH. THIS STORM CAN BE EXPECTED IN THE VICINITY OF... FAIRVIEW AT AROUND 244 PM MDT FRANKLIN AT AROUND 247 PM MDT PRESTON AT AROUND 249 PM MDT THIS THUNDERSTORM MAY PRODUCE STRONG GUSTY WIND...LARGE HAIL...AND FREQUENT LIGHTNING. TAKE COVER WHEN THREATENING WEATHER APPROACHES.
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 6:40 PM MDT | Flash Flood Warning | SLC | Garfield | 85 min |
| Sep 10, 11:14 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 61 min |
| Sep 11, 12:33 PM MDT | Flash Flood Warning | SLC | Kane | 47 min |
| Sep 11, 1:22 PM MDT | Flash Flood Warning | SLC | Kane | 58 min |
| Sep 11, 2:02 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 48 min |
| Sep 11, 3:01 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 49 min |
| Sep 11, 3:17 PM MDT | Severe Thunderstorm Warning | SLC | Kane, San Juan | 43 min |
| Sep 11, 3:46 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 44 min |
| Sep 11, 4:16 PM MDT | Severe Thunderstorm Warning | SLC | Cache | 34 min |
| Sep 11, 4:42 PM MDT | Severe Thunderstorm Warning | SLC | Bear Lake | 28 min |
Nearby
Severe Thunderstorm Warnings in Utah, 1997Severe Thunderstorm Warnings in Idaho, 1997Every severe thunderstorm warning in 1997
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.