Alert archive / Utah / Flash Flood Warnings in 1998
Flash Flood Warning 24, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 27, 1998, 1:25 AM MDT for Box Elder County, Utah. It was in force for 65 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 27, 1998, 1:25 AM MDT (07:25 UTC)
- Expired
- Jul 27, 1998, 2:30 AM MDT
- In force
- 65 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County Box Elder County, UT
The radar
The Salt Lake City radar (KMTX), 60 km from the middle of the area, began a volume at 07:24 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, 7.4 hours before the alert went out and 118 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 270732 COR
FFWSLC
UTC003-270830-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
125 AM MDT MON JUL 27 1998
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHWESTERN BOX ELDER COUNTY IN UTAH
* UNTIL 230 AM MDT
* AT 119 AM MDT WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
RAIN IN WEST CENTRAL BOX ELDER COUNTY ALONG STATE ROUTE 30.
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OVER
STATE ROUTE 30 EAST OF GROUSE CREEK JUNCTION. IN ADDITION...SMALL
CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES WILL
EXPERIENCE FLASH FLOODING.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
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 RADIO FOR UPDATES.
LAT...LON 4153 11367 4154 1134n3 4212 11342 4210 11379The 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 26, 9:21 PM MDT | Flash Flood Warning | SLC | Box Elder | 54 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.