Alert archive / Utah / Flash Flood Warnings in 1998
Flash Flood Warning 55, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Sep 6, 1998, 6:41 PM MDT for Piute County, Sevier County, Utah. It was in force for 49 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
- Sep 6, 1998, 6:41 PM MDT (00:41 UTC)
- Expired
- Sep 6, 1998, 7:30 PM MDT
- In force
- 49 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Piute County, UT, Sevier County, UT
The radar
The Cedar City radar (KICX), 122 km from the middle of the area, began a volume at 00:45 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, 0.7 hours before the alert went out and 258 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
- 12 J/kg
- Mixed-layer CIN
- -221 J/kg
- Mixed-layer LCL
- 2586 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 11 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 070042
FFWSLC
UTC031-041-070130-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
641 PM MDT SUN SEP 6 1998
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL SEVIER COUNTY IN UTAH
NORTHEASTERN PIUTE COUNTY IN UTAH
* UNTIL 730 PM MDT
* AT 639 PM MDT WEATHER SERVICE DOPPLER RADAR CONTINUED
TO SHOW THUNDERSTORMS WITH HEAVY RAIN CENTERED OVER SOUTH
CENTRAL SEVIER COUNTY BETWEEN BURRVILLE AND MONROE...MOVING
NORTH AT 12 MILES PER HOUR.
DOPPLER RADAR INDICATES THAT THESE THUNDERSTORMS WERE BEGINNING TO
MOVE SLOWLY TO THE NORTH. STORM TOTAL AMOUNTS OF BETWEEN 2 AND 4
INCHES OF RAIN HAVE FALLEN OVER THE MOUNTAINS WEST OF KOOSHAREM IN
SEVIER COUNTY. EXCESS RUNOFF FROM THESE THUNDERSTORMS WILL CAUSE
FLASH FLOODING...MUD SLIDES...AND ROCK SLIDES IN THE BOX CREEK
RESERVOIR AREA IN EXTREME NORTHEAST PIUTE COUNTY AND POINTS NORTH
INTO SOUTH CENTRAL SEVIER COUNTY.
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 3832 11210 3834 11187 3867 11189 3865 11213What 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, Sep 6, 1:00 PM MDT, 5 hours 41 minutes before
LOCAL STORM REPORT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 100 PM MDT SUN SEP 6 1998 TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS.... ...COUNTY LOCATION.... 0430 PM 28 W OF ~BIG WATER UT FLASH FLOODING. ROADS 09/05/98 KANE WASHED OUT. END
Local storm report, Sep 6, 1:00 PM MDT, 5 hours 41 minutes before
LOCAL STORM REPORT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 100 PM MDT SUN SEP 6 1998 TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS.... ...COUNTY LOCATION.... 0430 PM 28 W OF ~BIG WATER UT FLASH FLOODING. ROADS 09/05/98 KANE WASHED OUT. END
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.