Alert archive / Utah / Flash Flood Warnings in 1998
Flash Flood Warning 34, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 29, 1998, 7:00 PM MDT for Sanpete County, Utah. It was in force for 75 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 29, 1998, 7:00 PM MDT (01:00 UTC)
- Expired
- Jul 29, 1998, 8:15 PM MDT
- In force
- 75 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Sanpete County, UT
The radar
The Salt Lake City radar (KMTX), 216 km from the middle of the area, began a volume at 01:01 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 00:00Z, 1.0 hours before the alert went out and 151 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
- 621 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 2346 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- -8 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 300100
FFWSLC
UTC039-300215-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
700 PM MDT WED JUL 29 1998
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL SANPETE COUNTY IN UTAH
* UNTIL 815 PM MDT
* AT 650 MDT WEATHER SERVICE DOPPLER RADAR INDICATED MODERATE TO
HEAVY RAIN OVER SAN PETE COUNTY.
MODERATE TO HEAVY RAIN WILL MOVE UP CANAL CANYON SOUTHEAST OF SPRING
CITY. THIS CANYON IS PRONE TO FLASH FLOODING FROM EVEN MODEST
AMOUNTS OF RAIN DUE TO RECENT FLOODING AND NUMEROUS DEBRIS DAMS IN
THE CANYON.
PEOPLES IN SPRING CITY AND SOUTHEAST TOWARDS THE CANYON SHOULD
PREPARE FOR THE POSSIBILITY OF FLASH FLOODING AFTER 715 PM.
TO REPORT FLASH FLOODING HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY.
STAY TUNED TO LOCAL TELEVISION...RADIO...CABLE TV...OR NOAA WEATHER
RADIO FOR UPDATES.
LAT...LON 3938 11165 3935 11138 3960 11132 3956 11156The 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, 7:33 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, 5:38 PM MDT | Severe Thunderstorm Warning | SLC | Davis, Weber | 52 min |
| Jul 30, 5:59 PM MDT | Severe Thunderstorm Warning | SLC | Weber | 31 min |
Nearby
Flash Flood Warnings in Utah, 1998Every flash flood 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.