Alert archive / Utah / Flash Flood Warnings in 1998

Flash Flood Warning 36, NWS Salt Lake City, UT

August 9, 1998Kane County, Washington County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Aug 9, 1998, 1:32 PM MDT for Kane County, Washington County, Utah. It was in force for 118 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
Aug 9, 1998, 1:32 PM MDT (19:32 UTC)
Expired
Aug 9, 1998, 3:30 PM MDT
In force
118 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Kane County, UT, Washington County, UT

The radar

The Cedar City radar (KICX), 53 km from the middle of the area, began a volume at 19:35 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

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 7.5 hours before the alert went out and 239 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.

Skew-T log-pSkew-T log-p diagram, Flgstf/Belemont, AZ at 12:00Z on 1998-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 12:00Z on 1998-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -15 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
10 J/kg
Mixed-layer CIN
-130 J/kg
Mixed-layer LCL
2376 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-15 m²/s²
0-3 km storm-relative helicity
8 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSLC 091937
FFWSLC
UTC025-053-092130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
132 PM MDT SUN AUG 9 1998

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

   * FLASH FLOOD WARNING FOR...
     SOUTHEASTERN WASHINGTON COUNTY IN UTAH
     EXTREME SOUTHWESTERN KANE COUNTY IN UTAH

   * UNTIL 330 PM MDT

   * AT 129 PM MDT WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
     RAIN 2 MILES SOUTH OF SPRINGDALE...OR ABOUT 26 MILES WEST OF
     KANAB...MOVING NORTH AT 10 MILES PER HOUR.

   * OTHER LOCATIONS IN THE WARNING INCLUDE HILDALE...SPRINGDALE AND
     ZION NP

   * THUNDERSTORM WITH EXCESSIVE RAINFALL WILL BE...     
     OVER ZION NP SOUTH ENTRANCE AT 145 PM      

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT IS
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD AVOID
CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.


LAT...LON 3700 11319 3699 11289 3732 11281 3736 11308

What 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

Special weather statement, Aug 9, 12:00 PM MDT, 1 hour 32 minutes before
IDZ024-025-UTZ001>027-WYZ021-100000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1200 PM MDT SUN AUG 9 1998

...A CHANCE OF HEAVY RAINS FOR UTAH MONDAY AND TUESDAY...

FORMER TROPICAL STORM FRANK...NOW A TROPICAL DEPRESSION...IS MOVING
UP THROUGH BAJA CALIFORNIA.  FRANK IS EXPECTED TO DISSIPATE AS IT
MOVES CLOSER TO THE SOUTHERN CALIFORNIA DESERTS AND SOUTHERN ARIZONA.
THE REMNANTS OF THIS STORM WILL LIKELY BRING HEAVY RAINS TO PORTIONS
OF THE SOUTHWESTERN U.S. BEGINNING LATER TODAY.

WEATHER CHARTS INDICATE THAT WIDESPREAD HEAVY RAINS COULD OCCUR OVER
PORTIONS OF UTAH BEGINNING MONDAY AND CONTINUE INTO TUESDAY. IT IS
EVEN POSSIBLE FOR SOME LOCAL HEAVY SHOWERS IN EXTREME SOUTHWEST UTAH
TONIGHT.

AS WITH MOST TROPICAL RAIN SYSTEMS...PREDICTIONS CAN BE
DIFFICULT...THUS THOSE PLANNING OUTDOOR ACTIVITIES ESPECIALLY CAMPERS
AND HIKERS SHOULD BE AWARE OF POTENTIAL FLOODING AND STAY TUNED TO
LOCAL RADIO OR TELEVISION...CABLE TV OR NOAA WEATHER RADIO FOR
FURTHER UPDATES.
Special weather statement, Aug 9, 12:00 PM MDT, 1 hour 32 minutes before
IDZ024-025-UTZ001>027-WYZ021-100000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1200 PM MDT SUN AUG 9 1998

...A CHANCE OF HEAVY RAINS FOR UTAH MONDAY AND TUESDAY...

FORMER TROPICAL STORM FRANK...NOW A TROPICAL DEPRESSION...IS MOVING
UP THROUGH BAJA CALIFORNIA.  FRANK IS EXPECTED TO DISSIPATE AS IT
MOVES CLOSER TO THE SOUTHERN CALIFORNIA DESERTS AND SOUTHERN ARIZONA.
THE REMNANTS OF THIS STORM WILL LIKELY BRING HEAVY RAINS TO PORTIONS
OF THE SOUTHWESTERN U.S. BEGINNING LATER TODAY.

WEATHER CHARTS INDICATE THAT WIDESPREAD HEAVY RAINS COULD OCCUR OVER
PORTIONS OF UTAH BEGINNING MONDAY AND CONTINUE INTO TUESDAY. IT IS
EVEN POSSIBLE FOR SOME LOCAL HEAVY SHOWERS IN EXTREME SOUTHWEST UTAH
TONIGHT.

AS WITH MOST TROPICAL RAIN SYSTEMS...PREDICTIONS CAN BE
DIFFICULT...THUS THOSE PLANNING OUTDOOR ACTIVITIES ESPECIALLY CAMPERS
AND HIKERS SHOULD BE AWARE OF POTENTIAL FLOODING AND STAY TUNED TO
LOCAL RADIO OR TELEVISION...CABLE TV OR NOAA WEATHER RADIO FOR
FURTHER UPDATES.

The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 8, 8:25 PM MDTSevere Thunderstorm WarningSLCCache50 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.