Alert archive / Utah / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 63, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 30, 1998, 4:10 PM MDT for Duchesne County, Summit County, Wasatch County, Utah. It was in force for 50 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, 4:10 PM MDT (22:10 UTC)
- Expired
- Jul 30, 1998, 5:00 PM MDT
- In force
- 50 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Duchesne County, UT, Summit County, UT, Wasatch County, UT
The radar
The Salt Lake City radar (KMTX), 155 km from the middle of the area, began a volume at 22:11 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, 10.2 hours before the alert went out and 86 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.
024
WUUS1 KSLC 302214 RRA
SVRSLC
UTC013-043-051-302245-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
410 PM MDT THU JUL 30 1998
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WEST CENTRAL DUCHESNE COUNTY IN UTAH
EASTERN WASATCH COUNTY IN UTAH
* UNTIL 500 PM MDT
* AT 359 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 24 MILES SOUTHWEST OF HANNA...OR ABOUT 23
MILES SOUTHEAST OF HEBER CITY...MOVING NORTHEAST AT 20 MILES PER
HOUR.
* SEVERE THUNDERSTORM WILL BE...
17 MILES SOUTHWEST OF HANNA AT 420 PM MDT
13 MILES WEST OF HANNA AT 430 PM MDT
IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN
EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
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 4026 11130 4015 11113 4043 11061 4070 11091The 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, 4:22 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, 5:38 PM MDT | Severe Thunderstorm Warning | SLC | Davis, Weber | 52 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.