Flash Flood Warning 40, NWS Salt Lake City, UT

351 
WGUS75 KSLC 220534
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
1134 PM MDT Tue Jul 21 2026

UTC017-055-220630-
/O.CON.KSLC.FF.W.0040.000000T0000Z-260722T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Garfield UT-Wayne UT-
1134 PM MDT Tue Jul 21 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM MDT WEDNESDAY 
FOR NORTH CENTRAL GARFIELD AND SOUTH CENTRAL WAYNE COUNTIES...

At 1134 PM MDT, Doppler radar indicated thunderstorms producing 
heavy rain in Sheets Gulch and Red Canyon. Flood waves originating 
from these areas will move downstream to the Fremont River. Between 
0.5 and 1 inch of rain has fallen. Flash flooding is ongoing or 
expected to begin shortly.

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

SOURCE...Radar.

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

Some locations that will experience flash flooding include...
  Capitol Reef National Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Stay away or be swept away. River banks and culverts can become 
unstable and unsafe.

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 3823 11110 3830 11106 3831 11103 3819 11102
      3813 11105 3793 11099 3790 11113 3816 11119

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

$$

BW

174 
WGUS75 KSLC 220628
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
1228 AM MDT Wed Jul 22 2026

UTC017-055-220638-
/O.EXP.KSLC.FF.W.0040.000000T0000Z-260722T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Garfield UT-Wayne UT-
1228 AM MDT Wed Jul 22 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 1230 AM MDT EARLY THIS MORNING 
FOR NORTH CENTRAL GARFIELD AND SOUTH CENTRAL WAYNE COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

A Flood Watch remains in effect until 300 AM MDT for portions of 
central, southern, and southwest Utah.

&&

LAT...LON 3823 11110 3830 11106 3831 11103 3819 11102
      3813 11105 3793 11099 3790 11113 3816 11119

$$

BW

Area Forecast Discussion
National Weather Service Salt Lake City UT
548 PM MDT Tue Jul 21 2026

.KEY MESSAGES, Issued 116 PM MDT Tue Jul 21 2026...

- Scattered showers and thunderstorms are expected to develop across
portions of central, southern, northeast UT, and southwest WY each
afternoon within this forecast as monsoonal moisture continues
making its way north.

- The risk for flash flooding increases statewide today and
tomorrow, with both days featuring much of UT outlined within a
slight risk (2/4) of exceeding flash flood guidance.

- The potential for severe weather across UT this afternoon appears
to be increasing. Severe wind gusts (>58mph) appears to be the main
threat, particularly across southeast UT later this evening.

&&

.DISCUSSION, Issued 116 PM MDT Tue Jul 21 2026...
 A stronger monsoonal push is forecast to occur across
much of UT today as robust mid-level moisture returns to the region.
Currently, subsidence has built in across much of southern and
central UT following this mornings thunderstorms. This will serve to
offset convective initiation until around 1400-1500, enabling the
environment to destabilize further with CAPE general ranging from
1000-1500J/kg statewide, though CAPE ~2000J/kg appears possible
closer to southwest UT. With PWATs generally 1.2" or greater in
place across much of UT (0.8-1.0" PWAT anomalies for this time of
year), thunderstorms today are forecast to be efficient and heavy
rainmakers.

Of note, mid-level southwesterly flow will see an increase to around
20-30kts with multiple embedded shortwave perturbations providing
enough forcing for ascent. This will support multiple rounds of
storms this afternoon and through the evening hours as well as
storms propagating off terrain, which will be the opposite of what
we have been seeing through much of this recent monsoonal pattern
with storms remaining anchored to terrain. Typically, enhanced flow
would limit the flash flooding threat areawide as storms would not
remain over problematic basins and burn scars long enough to produce
flooding. However, given the efficient rainmaking status of these
storms with multiple rounds expected, the flash flooding threat
continues to exist, particularly if redevelopment occurs across a
single area in a short period of time. Additionally, the presence of
bulk shear to around 35kts supports organized storms sustaining
themselves for longer. Additionally, shear on this magnitude is
supportive of a supercell or two, particularly across southeast UT
where shear is greatest, which would increase the threat of flash
flooding further.

Regarding severe weather this afternoon and evening, the Storm
Prediction Center has placed much of UT within a Marginal Risk (1/5)
for severe weather with an emphasis on severe wind gusts in excess
of 58mph. Across most of UT, primarily western and northern, DCAPE
potentially in excess of 1500J/kg will exist this afternoon as
storms begin to develop ahead of the initial shortwave. This will
yield a scattered threat for strong to severe gusts through much of
the afternoon today as the enhanced flow aloft finds a better medium
amidst the higher DCAPE to mix down to the surface with.

Later this evening across southeast UT where forecast confidence in
wind shear to around 35kts is greatest, a westward propagating MCS
is forecast to move into the area from southwestern CO. Some mid-
level flow enhancement is possible around the time of initiation (to
around 30-40kts) with 1600-1800J/kg of DCAPE in place. This supports
an organized severe wind threat with a few severe gusts potentially
reaching as high as 70mph this evening across areas such as Glen
Canyon/Lake Powell and adjacent areas within eastern Wayne,
Garfield, and Kane counties.

A similar setup for flash flooding exists on Wednesday, though storm
motions are forecast to be somewhat slower as mid-level flow sees a
slight decrease. Fortunately, this will reduce wind shear somewhat
as well potentially reducing the longevity of storms. However, with
deep moisture remaining in place and weaker flow aloft, efficient
rainmaking thunderstorms remain expected with a slightly higher
chance of storms remaining anchored to terrain tomorrow.

From Thursday on, mid-level moisture will see a slight decrease
areawide. However, with ridging remaining overhead, daily chances
for thunderstorms will continue across much of the state and favor
terrain as steering flow aloft gradually weakens. The forecast
becomes somewhat muddied as we enter the weekend with global suites
continuing to disagree on moisture scouring, though the broader
pattern in place continues to support at least some continuation of
the monsoonal pattern into at least Saturday.

&&

.AVIATION...

KSLC...Monsoonal pattern continues. Outside of precipitation
influences, winds will favor a diurnally normal pattern. Gusty and
erratic outflow winds will be especially possible near
thunderstorms, with more modestly gusty conditions with showers.
There will be around a 30-50% chance of thunderstorms through 03Z
Wed, with shower activity becoming more likely thereafter into the
night. Thunderstorm chances then increase late morning through
Wednesday afternoon and evening. VFR conditions favored to persist,
but any heavier cell over the terminal may result in brief periods
of reduced CIGS/VIS.

REST OF UTAH AND SOUTHWEST WYOMING...An active weather pattern will
persist as monsoonal moisture remains. Thunderstorm chances will be
highest through 03Z Wed, with activity becoming more scattered
overnight into the day. Area wide thunderstorm activity then will
begin to once again increase in coverage late morning on through Wed
evening. This activity will bring periods of heavy rainfall,
lightning, gusty and erratic outflow winds, and potentially small
hail. Outside of precipitation and outflow influences, winds at area
terminals will favor a diurnally normal pattern and direction. VFR
conditions are also favored to generally prevail, but any stronger
cell directly atop a terminal will bring potential for periods of
reduced CIGS/VIS.

&&

.FIRE WEATHER, Issued 116 PM MDT Tue Jul 21 2026...
Monsoonal moisture remains in place throughout UT
increasing humidities and chances for showers / thunderstorms across
the state, helping moderating fire weather conditions statewide.
Chances for showers and thunderstorms see a notable uptick across
the entirety of the state today as a stronger monsoonal push arrives
this afternoon. Expect showers and thunderstorms to develop along
higher terrain parallel to I-15 each afternoon over the next several
days around 1200-1400 with gusty outflow winds, heavy rainfall, and
lightning. Some storms this afternoon, particularly across northwest
UT and southeast UT may feature severe wind gusts in excess of
58mph. Winds will generally remain light terrain driven
/ diurnal over the next several days other than thunderstorm
influenced winds and gusts.
&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...Flood Watch until 3 AM MDT Wednesday for UTZ113-115>131.

WY...None.
&&

PUBLIC...Worster
AVIATION...Warthen
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
721 PM MDT Tue Jul 21 2026

UTZ107-108-110-220200-
Wasatch Back UT-Wasatch Mountains I-80 North UT-
Cache Valley/Utah Portion UT-
721 PM MDT Tue Jul 21 2026

...A strong thunderstorm will impact portions of northeastern Weber,
southeastern Cache and west central Morgan Counties through 800 PM
MDT
...

At 720 PM MDT, Doppler radar was tracking a strong thunderstorm 11
miles east of North Ogden moving north at 20 mph.

HAZARD...Wind gusts up to 50 mph and pea 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...
Wellsville, Paradise, Huntsville, Nordic Valley, Causey Reservoir,
Pineview Reservoir, Eden, Powder Mountain, Avon, and Liberty.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4118 11155 4121 11181 4161 11193 4160 11148
TIME...MOT...LOC 0120Z 178DEG 19KT 4129 11174

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

BW

Special Weather Statement
National Weather Service Salt Lake City UT
753 PM MDT Tue Jul 21 2026

UTZ113-120-121-125-130-131-220245-
San Rafael Swell UT-Wasatch Plateau/Book Cliffs UT-
Western Canyonlands UT-Castle Country UT-Southern Mountains UT-
Glen Canyon Recreation Area/Lake Powell UT-
753 PM MDT Tue Jul 21 2026

...Strong thunderstorms will impact portions of northeastern
Garfield, eastern Wayne, Emery and south central Carbon Counties
through 845 PM MDT
...

At 752 PM MDT, Doppler radar was tracking decaying thunderstorms
along a line extending from 21 miles east of Green River to 7 miles
northwest of Hite Marina. These storms will be capable of producing
gusty outflow winds far away from precipitation. Movement was
northwest at 20 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Green River, Hanksville, Sunnyside, East Carbon, Goblin Valley,
Elgin, and Woodside.

This includes the following highways...
 Interstate 70 between mile markers 107 and 162.
 US Route 6 between mile markers 261 and 300.
 Utah Route 24 between mile markers 99 and 160.
 Utah Route 95 between mile markers 0 and 36.
 Utah Route 276 between mile markers 0 and 5.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3856 10999 3851 11005 3848 11000 3788 11051
      3860 11131 3961 11039 3929 11007 3900 11015
      3897 11004 3898 11015 3891 11018 3876 11008
      3869 11010 3865 11003 3861 11007 3860 11000
      3859 11006
TIME...MOT...LOC 0152Z 146DEG 19KT 3897 10977 3800 11046

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

BW

Special Weather Statement
National Weather Service Salt Lake City UT
800 PM MDT Tue Jul 21 2026

UTZ101-104-105-110-220245-
Salt Lake Valley UT-Northern Wasatch Front UT-Wasatch Mountains I-
80 North UT-Great Salt Lake Desert and Mountains UT-
800 PM MDT Tue Jul 21 2026

...A strong thunderstorm will impact portions of western Salt Lake
and south central Davis Counties through 845 PM MDT
...

At 800 PM MDT, Doppler radar was tracking a strong thunderstorm over
West Jordan, or near West Valley City, moving north at 10 mph.

HAZARD...Wind gusts of 50 to 55 mph and pea 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...
Salt Lake City, West Valley City, Sandy, Murray, West Jordan,
Taylorsville, South Jordan, Draper, Riverton, Cottonwood Heights,
Midvale, Holladay, South Salt Lake, Herriman, Millcreek, Kearns, Salt
Lake City International Airport, Magna, Oquirrh, and Cottonwood West.

This includes the following highways...
 Interstate 15 between mile markers 290 and 312.
 Interstate 80 in Utah between mile markers 103 and 126.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4050 11186 4052 11214 4083 11224 4082 11181
TIME...MOT...LOC 0200Z 186DEG 11KT 4059 11202

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH

BW

Special Weather Statement
National Weather Service Salt Lake City UT
846 PM MDT Tue Jul 21 2026

UTZ104-105-108-110-220330-
Salt Lake Valley UT-Wasatch Back UT-Northern Wasatch Front UT-
Wasatch Mountains I-80 North UT-
846 PM MDT Tue Jul 21 2026

...A strong thunderstorm will impact portions of southwestern Weber,
northwestern Salt Lake, Davis and west central Morgan Counties
through 930 PM MDT
...

At 846 PM MDT, Doppler radar was tracking a strong thunderstorm over
Salt Lake City International Airport moving north at 20 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Salt Lake City, Ogden, Layton, Bountiful, Farmington, Hill Air Force
Base, Roy, Clearfield, Kaysville, Syracuse, Clinton, South Ogden,
North Salt Lake, Centerville, Woods Cross, Washington Terrace,
Riverdale, Hooper, South Weber, and West Bountiful.

This storm will be capable of producing strong gusty winds on the
Great Salt Lake. This will lead to a sudden increase in waves and
very choppy waters which will result in hazardous boating conditions.
Boaters are urged to seek safe harbor if possible.

This includes the following highways...
 Interstate 15 between mile markers 311 and 341.
 Interstate 84 between mile markers 82 and 93.

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.

&&

LAT...LON 4082 11180 4077 11220 4116 11230 4123 11181
TIME...MOT...LOC 0246Z 190DEG 19KT 4079 11196

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

BW

Preliminary Local Storm Report
National Weather Service Salt Lake City UT
908 PM MDT Tue Jul 21 2026

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

0840 PM     Tstm Wnd Gst     Salt Lake City Weather  40.77N 111.95W
07/21/2026  M63 MPH          Salt Lake          UT   Public

            Measured wind gust of 63 mph I-215 at I-80
            mesonet sensor (UT215).

&&

STW

Preliminary Local Storm Report
National Weather Service Salt Lake City UT
910 PM MDT Tue Jul 21 2026

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

0854 PM     Tstm Wnd Gst     1 W Salt Lake City Weat 40.77N 111.97W
07/21/2026  M61 MPH          Salt Lake          UT   ASOS

            Measured gust of 61 mph at Salt Lake City
            International Airport ASOS (KSLC).

&&

STW