Alert archive / Utah / Flash Flood Warnings in 1998
Flash Flood Warning 23, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 26, 1998, 9:21 PM MDT for Box Elder County, Utah. It was in force for 54 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 26, 1998, 9:21 PM MDT (03:21 UTC)
- Expired
- Jul 26, 1998, 10:15 PM MDT
- In force
- 54 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Box Elder County, UT
The radar
The Salt Lake City radar (KMTX), 105 km from the middle of the area, began a volume at 03:21 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
Elko, NV (KLKN), launched 00:00Z, 3.4 hours before the alert went out and 84 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
- 154 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 2567 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 12 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 270325
FFWSLC
UTC003-270415-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
921 PM MDT SUN JUL 26 1998
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
WEST CENTRAL BOX ELDER COUNTY IN UTAH
* UNTIL 1015 PM MDT
* AT 909 PM MDT WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
RAIN OVER WEST CENTRAL BOX ELDER COUNTY...OR ABOUT 37 MILES
SOUTHWEST OF PARK VALLEY...MOVING SOUTHWEST AT 5 MILES PER HOUR.
THE THUNDERSTORM THAT IS GENERATING THE RAIN HAS BEEN MOVING VERY
SLOWLY TO THE SOUTHWEST JUST TO THE WEST OF HIGHWAY 30. WATER
ACROSS SOME SECTIONS OF HIGHWAY 30 IS LIKELY. NEVER TRY TO CROSS A
FLOODED ROADWAY.
TO REPORT FLASH FLOODING HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN IN SALT LAKE
CITY. STAY TUNED TO LOCAL TELEVISION...RADIO...CABLE TV...OR NOAA
WEATHER RADIOZ FOR UPDATES.
LAT...LON 4150 11352 4165 11362 4150 11388 4137 11377The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 6:15 PM MDT | Flash Flood Warning | SLC | Davis, Morgan, Weber | 30 min |
| Jul 26, 6:30 PM MDT | Flash Flood Warning | SLC | Davis, Morgan, Weber | 15 min |
| Jul 27, 1:25 AM MDT | Flash Flood Warning | SLC | Box Elder | 65 min |
| Jul 27, 2:10 PM MDT | Flash Flood Warning | SLC | Garfield, Iron, Kane | 2 hr |
| Jul 27, 2:51 PM MDT | Flash Flood Warning | SLC | Washington | 3 hr |
| Jul 27, 5:37 PM MDT | Flash Flood Warning | SLC | Iron, Washington | 83 min |
| Jul 27, 5:47 PM MDT | Flash Flood Warning | SLC | Iron, Washington | 73 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.