Alert archive / Utah / Flash Flood Warnings in 1998
Flash Flood Warning 11, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 24, 1998, 6:29 PM MDT for Summit County, Utah. It was in force for 2 hr. 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 24, 1998, 6:29 PM MDT (00:29 UTC)
- Expired
- Jul 24, 1998, 8:30 PM MDT
- In force
- 2 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Summit County, UT
The radar
The Salt Lake City radar (KMTX), 103 km from the middle of the area, began a volume at 00:30 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, 0.5 hours before the alert went out and 41 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
- 408 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 1293 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 62 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 250036
FFWSLC
UTC043-250230-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
629 PM MDT FRI JUL 24 1998
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN SUMMIT COUNTY IN UTAH
* UNTIL 830 PM MDT
* AT 624 PM MDT WEATHER SERVICE DOPPLER RADAR AND SPOTTER
REPORTS INDICATE VERY HEAVY RAIN FALLING ALONG I-80 IN
SOUTHWEST SUMMIT COUNTY. A WEATHER SERVICE SPOTTER IN THE
KIMBALL JUNCTION AREA REPORTS 1.60 INCHES OF RAIN HAS FALLEN
IN LESS THAN AN HOUR. RADAR ESTIMATES INDICATE AS MUCH AS 3
INCHES OF RAIN HAS FALLEN JUST SOUTH OF I-80 IN WHITE PINE
CANYON AREA.
NORMALLY DRY WASHES AND SMALL STREAMS WILL BE RUNNING FULL.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.
LAT...LON 4074 11162 4067 11149 4073 11114 4091 11121What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Local storm report, Jul 24, 1:00 PM MDT, 5 hours 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
100 PM MDT FRI JUL 24 1998
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1120 AM NEWCASTLE UT TORNADO
07/23/98 IRON TORNADO BRIEFLY TOUCHED
DOWN OFF OF HIGHWAY 56
SOUTHEAST OF NEWCASTLE.
NO APPARENT DAMAGE.
0740 PM NATURAL BRIDGES NM UT FLASH FLOODING
07/23/98 SAN JUAN FLASH FLOOD IN SEVERAL
CANYONS AND SMALL STREAMS
WITHIN PARK BOUNDARIES.
ENDThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 3:14 AM MDT | Flash Flood Warning | SLC | Weber | 3 hr |
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.