Alert archive / Utah / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 65, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Aug 10, 1997, 7:29 PM MDT for Box Elder County, Utah. It was in force for 61 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
- Aug 10, 1997, 7:29 PM MDT (01:29 UTC)
- Expired
- Aug 10, 1997, 8:30 PM MDT
- In force
- 61 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County Box Elder County, UT
The radar
The Salt Lake City radar (KMTX), 60 km from the middle of the area, began a volume at 01:31 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 10, 8:40 PM MDT | Thunderstorm Wind 58 | (Bmc)Brigham City Ar, UT |
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
Elko, NV (KLKN), launched 00:00Z, 1.5 hours before the alert went out and 118 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
- 13 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 2798 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSLC 110134 RRA SVRSLC UTC003-110230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 729 PM MDT SUN AUG 10 1997 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 830 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHWESTERN UTAH ...NORTHEASTERN BOX ELDER COUNTY AT 724 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER RADAR 33 MILES NORTHWEST OF BRIGHAM CITY OR 7 MILES SOUTHWEST OF PORTAGE MOVING EAST AT 10 MPH. THIS STORM CAN BE EXPECTED IN THE VICINITY OF... PORTAGE AT AROUND 750 PM MDT WASHAKIE AT AROUND 755 PM MDT PLYMOUTH AT AROUND 800 PM MDT THIS STORM WILL ALSO AFFECT I-15 NORTH OF TREMONTON LARGE HAIL AND WINDS TO 60 MPH CAN BE EXPECTED FROM THIS STORM.
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 6:15 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder, Tooele | 55 min |
| Aug 10, 7:10 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder, Tooele | |
| Aug 10, 7:10 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder, Tooele | 60 min |
| Aug 10, 8:15 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder, Davis, Weber | 75 min |
| Aug 10, 9:33 PM MDT | Severe Thunderstorm Warning | SLC | Davis, Morgan, Summit, Weber | 47 min |
| Aug 10, 10:03 PM MDT | Severe Thunderstorm Warning | SLC | Salt Lake, Utah | 42 min |
| Aug 11, 3:34 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 46 min |
| Aug 11, 3:43 PM MDT | Flash Flood Warning | SLC | Garfield | 3 hr |
| Aug 11, 5:59 PM MDT | Flash Flood Warning | SLC | Garfield | 46 min |
| Aug 11, 5:59 PM MDT | Severe Thunderstorm Warning | SLC | Garfield | 46 min |
Nearby
Severe Thunderstorm Warnings in Utah, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.