Flash Flood Warning 72, NWS Salt Lake City, UT

092 
WGUS75 KSLC 120052
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
652 PM MDT Tue Aug 11 2026

UTC017-120230-
/O.CON.KSLC.FF.W.0072.000000T0000Z-260812T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Garfield UT-
652 PM MDT Tue Aug 11 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM MDT THIS
EVENING FOR CENTRAL GARFIELD COUNTY...

At 652 PM MDT, Between 1 and 1.5 inches of rain have fallen in the
Upper Escalante River as well as North Creek, Birch Creek, Wide
Hollow, and Death Hollow. Flash flooding is ongoing.

HAZARD...Heavy rainfall from thunderstorms producing life-
         threatening flash flooding in the Upper Escalante River.

SOURCE...Radar indicated.

IMPACT...Life threatening flash flooding of creeks and streams,
         normally dry washes, and backcountry roads.

Some locations that will experience flash flooding include...
  The Upper Escalante River, North Creek, Birch Creek, Wide Hollow,
  and Death Hollow with flows anticipated to move downstream through
  the Upper Escalante River Canyon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Move to higher ground now. Act quickly to protect your life.

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

&&

LAT...LON 3790 11187 3794 11179 3798 11161 3787 11152
      3778 11144 3776 11132 3773 11128 3771 11130
      3775 11139 3777 11161 3775 11172 3778 11183
      3785 11188 3787 11189

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

BW

328 
WGUS75 KSLC 120225
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
825 PM MDT Tue Aug 11 2026

UTC017-120235-
/O.EXP.KSLC.FF.W.0072.000000T0000Z-260812T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Garfield UT-
825 PM MDT Tue Aug 11 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 830 PM MDT THIS EVENING FOR
CENTRAL GARFIELD COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a
threat.

&&

LAT...LON 3790 11187 3794 11179 3798 11161 3787 11152
      3778 11144 3776 11132 3773 11128 3771 11130
      3775 11139 3777 11161 3775 11172 3778 11183
      3785 11188 3787 11189

$$

BW

Area Forecast Discussion
National Weather Service Salt Lake City UT
1226 PM MDT Tue Aug 11 2026

.KEY MESSAGES...

- A marginal risk of excessive rainfall will continue across much
  of Utah through at least Friday. This risk expands further north
  on Thursday and Friday.

- Temperatures will decrease 10-15 degrees by the end of the week
  with slightly drier air pushing into the area by the weekend.

&&

.DISCUSSION...Monsoon moisture will remain in place through Friday
as the ridge responsible for this influx gradually shifts to the
east. As this ridge shifts to the east a weak trough will push
into the western CONUS. This will enhance lift on Thursday and
Friday to expand widespread convection across all of Utah and SW
Wyoming. The flash flooding risk will gradually expand into
northern Utah Thursday and Friday with slot canyons, normal dry
washes, urban areas, and recent burn scars will be most
susceptible to flooding.

Convection will develop each afternoon and persist through the
early evening before gradually diminishing overnight. The caveat
with this will be for the potential for nocturnal convection.
Guidance continues to hint at lingering moisture overnight, such
as tonight across northern Utah, but models struggle to capture
these features accurately. The most likely time for nocturnal
activity will come Thursday and Friday as forcing increases.
Temperatures will also trend down 10-15 degrees with the increased
cloud coverage and cooling temperatures aloft.

Slightly drier air moves into the area this weekend with most of
the diurnal convection confined to the higher terrain. Moisture
moves back into the area next week as the ridge re-positions
itself over the Four Corners. This active pattern looks to remain
across the area, in some form, through the next couple of weeks.

&&

.AVIATION...

KSLC...Winds will remain southerly until a transition to
northwesterly expected between 19-20z. There is a 25-35% chance of
showers and thunderstorms in the Salt Lake Valley between 20Z-06Z,
and any shower or thunderstorm will be capable of producing gusty
and erratic winds. VFR conditions will largely prevail, but can't
rule out reductions in VIS from heavy rain and/or blowing dust if a
thunderstorm core passes over the terminal.

REST OF UTAH AND SOUTHWEST WYOMING...Terrain-driven showers and
thunderstorms will be in place this afternoon and evening, with some
of this activity surviving off of the terrain and moving towards the
northeast. Any shower or thunderstorm will be capable of producing
briefly heavy rain and gusty/erratic winds. Latest high-resolution
models insist that a complex of showers and thunderstorms will
overspread northern Utah during the late evening hours before moving
across northeast Utah and SW Wyoming during the late evening and
early morning hours Wednesday.

&&

.FIRE WEATHER...Monsoon moisture will continue to surge into Utah
through the remainder of the week with storms developing during the
afternoon and weakening late evening and overnight. Some nocturnal
activity will remain and persist, but the details of when and where
with these storms will likely remain uncertain until the day of.
Storms will be capable of producing gusty and erratic outflow winds
along with frequent lightning and brief heavy rain.

A storm system approaches by Thursday that will increase southwesterly
winds, but RH will remain elevated. This storm system will help to
expand precipitation across most of northern Utah, persisting through
Friday. Temperatures will cool 10-15 degrees across the area as this
system brings a cooler airmass. By the weekend, a slightly drier
airmass will limit most of the diurnal storms to the high terrain
before better moisture returns next week.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...None.
WY...None.
&&

PUBLIC...Mahan
AVIATION...ADeSmet
FIRE WEATHER...Mahan

For more information from NOAA's National Weather Service visit...
http://weather.gov/saltlakecity

Preliminary Local Storm Report
National Weather Service Salt Lake City UT
206 PM MDT Tue Aug 11 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0131 PM     Flash Flood      5 SSE Marysvale         38.38N 112.23W
08/11/2026                   Piute              UT   Dept of Highways

            UDOT reported a complete closure of HWY 89
            at MP 173 due to flooding across the roadway
            originating from the Cottonwood burn scar.

&&

AD