Alert archive / Utah / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 66, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 30, 1998, 5:38 PM MDT for Davis County, Weber County, Utah. It was in force for 52 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
- Jul 30, 1998, 5:38 PM MDT (23:38 UTC)
- Expired
- Jul 30, 1998, 6:30 PM MDT
- In force
- 52 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Davis County, UT, Weber County, UT
The radar
The Salt Lake City radar (KMTX), 44 km from the middle of the area, began a volume at 23:37 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
Salt Lake City I, UT (KSLC), launched 12:00Z, 11.6 hours before the alert went out and 35 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
- 22 J/kg
- Mixed-layer CIN
- -357 J/kg
- Mixed-layer LCL
- 1900 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
565
WUUS1 KSLC 302340 RRA
SVRSLC
UTC011-057-310030-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
538 PM MDT THU JUL 30 1998
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTH CENTRAL WEBER COUNTY IN UTAH
NORTH CENTRAL DAVIS COUNTY IN UTAH
INCLUDING KAYSVILLE AND LAYTON
* UNTIL 630 PM MDT
* AT 532 PM MDT A SEVERE THUNDERSTORM WAS REPORTED 2 MILES WEST OF
KAYSVILLE...MOVING NORTH AT 20 MILES PER HOUR.
* SEVERE THUNDERSTORM WILL BE...
OVER LAYTON AT 540 PM MDT
OVER HILL AFB AT 550 PM MDT
3 MILES EAST OF ROY AT 600 PM MDT
7 MILES NORTHEAST OF ROY AT 615 PM MDT
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 4100 11196 4118 11188 4120 11207 4102 11206The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 6:02 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 43 min |
| Jul 29, 7:00 PM MDT | Flash Flood Warning | SLC | Sanpete | 75 min |
| Jul 29, 7:33 PM MDT | Severe Thunderstorm Warning | SLC | Davis, Salt Lake | 42 min |
| Jul 29, 8:06 PM MDT | Severe Thunderstorm Warning | SLC | Davis, Morgan, Salt Lake | 39 min |
| Jul 30, 4:10 PM MDT | Severe Thunderstorm Warning | SLC | Duchesne, Summit, Wasatch | 50 min |
| Jul 30, 4:22 PM MDT | Severe Thunderstorm Warning | SLC | Beaver, Iron | 53 min |
| Jul 30, 4:32 PM MDT | Severe Thunderstorm Warning | SLC | Emery | 43 min |
| Jul 30, 5:59 PM MDT | Severe Thunderstorm Warning | SLC | Weber | 31 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.