Severe Thunderstorm Warning 101, NWS Salt Lake City, UT

079 
WWUS55 KSLC 292310
SVSSLC

Severe Weather Statement
National Weather Service Salt Lake City UT
510 PM MDT Sat Aug 29 2026

UTC025-037-292330-
/O.CON.KSLC.SV.W.0101.000000T0000Z-260829T2330Z/
San Juan UT-Kane UT-
510 PM MDT Sat Aug 29 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MDT
FOR SOUTHWESTERN SAN JUAN AND EASTERN KANE COUNTIES...

At 510 PM MDT, a severe thunderstorm was located 9 miles northwest of
Lake Powell, or 42 miles south of Escalante, moving east at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Lake Powell and Dangling Rope Marina.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

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

&&

LAT...LON 3704 11159 3725 11160 3736 11150 3753 11107
      3700 11106
TIME...MOT...LOC 2310Z 256DEG 27KT 3717 11137 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

STW

497 
WWUS55 KSLC 292325
SVSSLC

Severe Weather Statement
National Weather Service Salt Lake City UT
525 PM MDT Sat Aug 29 2026

UTC025-037-292333-
/O.EXP.KSLC.SV.W.0101.000000T0000Z-260829T2330Z/
San Juan UT-Kane UT-
525 PM MDT Sat Aug 29 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SAN JUAN AND
EASTERN KANE COUNTIES WILL EXPIRE AT 530 PM MDT...

The storm which prompted the warning has moved out of the initial 
warning area. Therefore, the warning will be allowed to expire.

Remember, a Severe Thunderstorm Warning still remains in effect for 
portions of eastern Kane County and southwestern San Juan County.

LAT...LON 3704 11159 3725 11160 3736 11150 3753 11107
      3700 11106
TIME...MOT...LOC 2323Z 255DEG 26KT 3719 11127 

$$

STW

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

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

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

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

0314 PM     Flash Flood      4 N Capitol Reef Np     38.34N 111.21W
08/29/2026                   Wayne              UT   Park/Forest Srvc

            Washes in Cathedral Valley running about 14
            inches deep. Time estimated.

&&

CRK

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

UTZ101-115-292315-
Western Millard and Juab Counties UT-
Great Salt Lake Desert and Mountains UT-
428 PM MDT Sat Aug 29 2026

...A strong thunderstorm will impact portions of northwestern Juab
and southwestern Tooele Counties through 515 PM MDT
...

At 428 PM MDT, Doppler radar was tracking a strong thunderstorm 15
miles northwest of Partoun, or 29 miles east of Schellbourne, moving
northeast at 40 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...
Callao.

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 3997 11405 4019 11361 3987 11343 3972 11405
TIME...MOT...LOC 2228Z 246DEG 33KT 3981 11411

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

JCW

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

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

0300 PM     Flash Flood      10 NW Goblin Valley     38.66N 110.81W
08/29/2026                   Emery              UT   Park/Forest Srvc

            Large flood reported on Little Wildhorse.
            Time approximate.

&&

CRK

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

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

0430 PM     Tstm Wnd Gst     3 WNW Big Water         37.09N 111.71W
08/29/2026  M75 MPH          Kane               UT   Mesonet

            Mesonet station PC567 Big Water West.

&&

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

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

0330 PM     Tstm Wnd Gst     1 SSE Sugarville        39.45N 112.64W
08/29/2026  M60 MPH          Millard            UT   Mesonet

            Measured at the Sutherland - Agrimet SUTU
            site.

&&

AD