Flash Flood Warning 90, NWS Salt Lake City, UT

217 
WGUS75 KSLC 300127
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
727 PM MDT Sat Aug 29 2026

UTC025-300445-
/O.CON.KSLC.FF.W.0090.000000T0000Z-260830T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kane UT-
727 PM MDT Sat Aug 29 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM MDT THIS
EVENING FOR CENTRAL KANE COUNTY...

At 727 PM MDT, the public reported flows on Wahweap Creek from
earlier thunderstorms that produced heavy rainfall over the warned
area. Heavy rain fell primarily over upper reaches of the Paria River
and over the Paria River near the confluence with Cottonwood Creek
over to Wahweap Creek. Water will continue to flow downstream through
Lower Hackberry Canyon, Bull Valley Gorge, and the Lower Paria River
Canyon. Up to 1.00 inches of rain have fallen. Flash flooding is
ongoing or expected to begin shortly.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Public reported.

IMPACT...Life threatening flash flooding of creeks, streams, slot
         canyons, and normally dry washes.

Some locations that will experience flash flooding include...
  areas within the Paria River drainage, including Bull Valley Gorge,
  Herm Pollock Slot Canyon, Lower Hackberry Canyon, and Lower Paria
  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.

Remain alert for flooding even in locations not receiving rain. Dry
washes, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.

&&

LAT...LON 3747 11222 3753 11213 3753 11181 3712 11162
      3700 11144 3700 11184 3707 11195 3735 11211

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

JAC

826 
WGUS75 KSLC 300441
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
1041 PM MDT Sat Aug 29 2026

UTC025-300451-
/O.EXP.KSLC.FF.W.0090.000000T0000Z-260830T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kane UT-
1041 PM MDT Sat Aug 29 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 1045 PM MDT THIS EVENING FOR
CENTRAL KANE COUNTY...

The heavy rain has ended. Please continue to heed remaining road
closures.

A Flood Watch remains in effect until 900 PM MDT Monday for portions
of central, southern, and southwest Utah.

&&

LAT...LON 3747 11222 3753 11213 3753 11181 3712 11162
      3700 11144 3700 11184 3707 11195 3735 11211

$$

JAC

Area Forecast Discussion
National Weather Service Salt Lake City UT
1226 PM MDT Sat Aug 29 2026

.KEY MESSAGES, Issued 1151 AM MDT Sat Aug 29 2026...

- Multiple rounds of scattered showers and thunderstorms are
  expected to occur this afternoon across UT, primarily northern
  and central UT where strong to severe storms are expected.

- Flash flooding concerns exist across UT today through at least
  Monday. Of the days within this stretch, Monday looks to be the
  most concerning.

- Weather areawide may calm down somewhat by midweek, though some
  uncertainties remain regarding this solution.

&&

.DISCUSSION, Issued 1151 AM MDT Sat Aug 29 2026...
Currently, a deepening upper trough is pushing
inland with its axis centered over WA/OR with a shortwave to its
southeast progressing NE through the Great Basin. Ample mid-level
mass response has developed an enhanced belt of southwesterlies
atop strong mid-level frontogenesis, serving as a focal point for
thunderstorm development across northern UT this morning. A few
severe wind gusts have been observed primarily across the Great
Salt Lake Desert with sub-severe hail closer to the Wasatch Front,
though northeasterly winds and surface temperatures in the 60s
have largely limited the severe threat keeping storms elevated
instead of surface based due to a stable boundary layer. A few
stronger gusts can't be ruled out with this complex as it moves
further east into the Uinta basin where surface temperatures have
continually warmed this morning in the absence of cloud cover,
though gusts are not expected to be widespread.

Through the remainder of the afternoon, multiple shortwave
perturbations embedded within the flow will traverse northwest UT
serving as a focal point for thunderstorm development. Continual
moistening of the boundary layer with daytime heating increasing
with the erosion of a persistent cloud deck should result in
increasing instability generally south of a line extending from
Wendover to Salt Lake City yielding MLCAPE values from
1000-1500J/kg, perhaps higher if cloud cover clears faster.
Additionally, enhanced southwest flow aloft will result in Eff.
Shear values exceeding 40kts across a large portion of northern UT
to central UT, supporting the development of supercells capable of
wind gusts potentially in excess of 70mph and hail to around 1".

Flooding remains a concern today as well, particularly if more
supercellular convection develops given the moist environment
characterized by PWATs from 1-1.3" of water. However, this threat
may be limited by fast ENE storm motions today, though would still
pose a problem if storms are to track over problematic terrain and
burn scars.

Tomorrow, the upper trough progresses through ID serving as a
focal point for widespread thunderstorm development tomorrow
afternoon across UT. Moisture, instability, and shear leave much
to be desired, though portions of southern UT may see some flash
flood threat develop with slower moving storms associated with a
trailing wave. Come Monday, the threat for flash flooding across
southern UT increases substantially as a stronger moisture surge
races north. High PWATs, potentially as high as 1.3-1.5" of water
are expected to advect north amidst an environment favorable for
slow moving (and potentially backbuilding) storms. Some
uncertainties exist regarding this, though Monday is shaping up to
be quite wet across southern UT in particular.

&&

.AVIATION, Issued 1216 PM MDT Sat Aug 29 2026...

KSLC...Southerly winds will vie with northerlies with passing
showers and thunderstorms this afternoon into early evening.
Widespread storms are expected to redevelop across northern Utah
after 22z and are expected to impact the terminal at times through
the remainder of the evening. Storms this afternoon will be capable
of producing gusty and erratic outflow winds in excess of 50 kts,
hail, and heavy rainfall that may result in periods of MVFR to IFR
conditions.

REST OF UTAH AND SOUTHWEST WYOMING...Widespread showers and
thunderstorms have redeveloped across much of the airspace and are
expected to persist through this evening. Storms this afternoon
will be capable of producing gusty and erratic outflow winds in
excess of 50 kts, hail, and heavy rainfall that may result in
periods of MVFR to IFR conditions, mainly across northern Utah.

&&

.FIRE WEATHER...Active weather continues today with strong to severe
thunderstorms developing this afternoon across northern and
central Utah with a flash flooding threat also developing this
afternoon across central and southern Utah. Regarding the severe
threat further north, wind gusts in excess of 58-70mph and hail to
around 1" are expected this afternoon with any of the stronger
storms that form. Across southern Utah, monsoonal moisture
continues to surge north bringing an attendant flash flooding
threat to the area through at least Monday. While storm
development across southern Utah may be somewhat muted Sunday
afternoon, Monday appears somewhat concerning regarding rainfall
high rainfall rates and amounts. Regardless, a wetting rain is
expected across the entirety of Utah through early next week.

Following this active patter, a drying and cooling trend will take
place as most showers and thunderstorms appear to remain confined
to the higher terrain at this time. Temperatures will run roughly
5F below seasonal normals with RH approaching normals around mid-
week.

&&

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

PUBLIC...Worster
AVIATION...Verzella
FIRE WEATHER...Worster

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

Special Weather Statement
National Weather Service Salt Lake City UT
313 PM MDT Sat Aug 29 2026

UTZ128-292145-
South Central Utah UT-
313 PM MDT Sat Aug 29 2026

...A strong thunderstorm will impact portions of southwestern Kane
County through 345 PM MDT
...

At 313 PM MDT, Doppler radar was tracking a strong thunderstorm near
Kanab, moving northeast at 35 mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Kanab.

This includes US Route 89 between mile markers 33 and 45, and between
mile markers 48 and 67.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3709 11254 3735 11217 3712 11199 3700 11237
      3700 11254
TIME...MOT...LOC 2113Z 238DEG 32KT 3707 11242

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

STW

Special Weather Statement
National Weather Service Salt Lake City UT
316 PM MDT Sat Aug 29 2026

UTZ117-120-121-292200-
San Rafael Swell UT-Castle Country UT-Central Mountains UT-
316 PM MDT Sat Aug 29 2026

...Strong thunderstorms will impact portions of southeastern Sanpete
and northwestern Emery Counties through 400 PM MDT
...

At 316 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 8 miles west of Huntington to 11 miles west of
Clawson. Movement was east at 35 mph.

HAZARD...Wind gusts of 50 to 55 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Huntington, Clawson, Castle Dale, Ferron, Orangeville, Cleveland,
Elmo, and Molen.

This includes Utah Route 10 between mile markers 24 and 56.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3947 11054 3903 11090 3905 11142 3939 11122
TIME...MOT...LOC 2116Z 261DEG 30KT 3932 11113 3912 11131

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH

JCW

Special Weather Statement
National Weather Service Salt Lake City UT
334 PM MDT Sat Aug 29 2026

UTZ115-292215-
Western Millard and Juab Counties UT-
334 PM MDT Sat Aug 29 2026

...A strong thunderstorm will impact portions of north central
Millard and central Juab Counties through 415 PM MDT
...

At 333 PM MDT, Doppler radar was tracking a strong thunderstorm 25
miles west of Delta, moving east at 35 mph.

HAZARD...Wind gusts of 50 to 55 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Abraham, Sugarville, Sutherland, and Little Sahara State Park.

This includes US Route 6 between mile markers 92 and 100.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3936 11309 3957 11311 3968 11246 3938 11240
TIME...MOT...LOC 2133Z 260DEG 29KT 3947 11302

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH

JCW

Special Weather Statement
National Weather Service Salt Lake City UT
340 PM MDT Sat Aug 29 2026

UTZ125-128-292215-
South Central Utah UT-Southern Mountains UT-
340 PM MDT Sat Aug 29 2026

...A strong thunderstorm will impact portions of south central
Garfield and north central Kane Counties through 415 PM MDT
...

At 340 PM MDT, Doppler radar was tracking a strong thunderstorm near
Henrieville, or 22 miles southwest of Escalante, moving east at 25
mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Henrieville and Kodachrome Basin State Park.

This includes Utah Route 12 between mile markers 29 and 46.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3744 11200 3765 11200 3775 11160 3745 11154
TIME...MOT...LOC 2140Z 258DEG 23KT 3755 11192

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

STW

Special Weather Statement
National Weather Service Salt Lake City UT
341 PM MDT Sat Aug 29 2026

UTZ115-292215-
Western Millard and Juab Counties UT-
341 PM MDT Sat Aug 29 2026

...A strong thunderstorm will impact portions of north central
Millard County through 415 PM MDT
...

At 340 PM MDT, Doppler radar was tracking a strong thunderstorm 29
miles west of Delta, moving east at 25 mph.

HAZARD...Wind gusts of 50 to 55 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Delta, Hinckley, and Sutherland.

This includes the following highways...
 US Route 6 between mile markers 60 and 94.
 US Route 50 between mile markers 90 and 94.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3919 11319 3937 11321 3940 11248 3908 11252
TIME...MOT...LOC 2140Z 265DEG 20KT 3929 11310

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH

JCW

Preliminary Local Storm Report
National Weather Service Salt Lake City UT
409 PM MDT Sat Aug 29 2026

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

0400 PM     Flood            Orangeville             39.23N 111.05W
08/29/2026                   Emery              UT   Broadcast Media

            Broadcast media received videos of
            floodwaters through Welcome Park.

&&

CRK