Alert archive / Utah / Flash Flood Warnings in 2026
Flash Flood Warning 125, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Sep 15, 2026, 5:24 PM MDT for Emery County, Utah. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 15, 2026, 5:24 PM MDT (23:24 UTC)
- Expired
- Sep 15, 2026, 8:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Emery County, UT
The radar
The Grand Junction radar (KGJX), 215 km from the middle of the area, began a volume at 23:25 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
Salt Lake City I, UT (KSLC), launched 12:00Z, 11.4 hours before the alert went out and 223 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2330 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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.
NWS Salt Lake City, UT wrote its last area forecast discussion before this flash flood warning went out at Sep 15, 1:49 PM MDT, 3 hours 35 minutes earlier. Its key messages:
- Deep moisture will continue to bring an elevated threat of flooding to portions of southern and eastern Utah through at least Friday.
- A Flood Watch for flash flooding has been issued from late tonight until Thursday morning for portions of southern and eastern Utah including Zion National Park, Capitol Reef National Park, Glen Canyon Recreation Area, the greater Grand Staircase- Escalante National Monument area, and the lower Paria including Buckskin Gulch and Paria Canyon north of the Arizona border.
- A marginal risk for excessive rainfall (level 1/4 continues for Thursday and Friday across southern and eastern Utah.
Area forecast discussion, Sep 15, 1:49 PM MDT, 3 hours 35 minutes before
Area Forecast Discussion
National Weather Service Salt Lake City UT
149 PM MDT Tue Sep 15 2026
.KEY MESSAGES...
- Deep moisture will continue to bring an elevated threat of
flooding to portions of southern and eastern Utah through at
least Friday.
- A Flood Watch for flash flooding has been issued from late
tonight until Thursday morning for portions of southern and
eastern Utah including Zion National Park, Capitol Reef National
Park, Glen Canyon Recreation Area, the greater Grand Staircase-
Escalante National Monument area, and the lower Paria including
Buckskin Gulch and Paria Canyon north of the Arizona border.
- A marginal risk for excessive rainfall (level 1/4 continues for
Thursday and Friday across southern and eastern Utah.
&&
.DISCUSSION...Quick discussion due to ongoing severe and flash
flood threat. Increasing moisture across southern and eastern Utah
will continue to bring the threat of flash flooding through at
least Friday, though the highest potential will be through
Thursday morning. Given trends in CAMS with shortwave troughs
ejecting across the area ahead of the parent low off the Pacific
Coast, multiple rounds of strong convection with a heavy rain
threat will occur. A majority of CAMS solutions develop an area
of thunderstorms with heavy rain across southwestern and south
central Utah near to after midnight, becoming widespread across
eastern and southern Utah by late Wednesday morning, mainly east
of I-15.
This threat will continue through at least late Wednesday night,
potentially into Thursday morning as yet another shortwave trough
ejects across the region.
As the upper level low ejects across the Great Basin Friday into
Saturday, drier conditions will build into the state from west to
east.
A Flood Watch for flash flooding has been issued for portions of
southern and eastern Utah from late tonight through Thursday
morning. Depending on trends, this may need to be extended to
include additional zones in the state and/or extended into at
least Thursday night by later shifts.
&&
.AVIATION...
KSLC...Northwesterly winds will likely prevail through the
afternoon, transitioning to southeasterly around 03-04z. Overnight
showers and thunderstorms may approach the terminal as early as
04z, gradually increasing in coverage through roughly 10-12z
before diminishing by as late as 15z. Winds could be a bit
squirrelly with these storms, with a greater chance for strong
outflow winds expected Wednesday afternoon as thunderstorms build
after 22z.
REST OF UTAH AND SOUTHWEST WYOMING...Southwesterly winds will
build across much of the area this afternoon, with scattered
thunderstorms focused primarily over southeastern Utah, roughly
southeast of a line extending from KCDC-KU69. Intermittent showers
and thunderstorms will likely continue through the overnight
hours across mainly areas south of KOGD, where winds could be
gusty and erratic at times.
&&
.FIRE WEATHER...An ongoing moisture surge will bring an increased
threat of showers and thunderstorms across eastern and southern
Utah through at least Friday. For locations west of I-15,
humidities will increase above critical levels by Wednesday,
however gusts to 30 mph will continue through Thursday.
&&
.SLC WATCHES/WARNINGS/ADVISORIES...
UT...Flood Watch from Wednesday afternoon through late Wednesday
night for UTZ121-129.
Flood Watch from midnight MDT tonight through late Wednesday
night for UTZ124-128-130-131.
WY...None.
&&
Kruse/Cunningham
For more information from NOAA's National Weather Service visit...
http://weather.gov/saltlakecityIn the hours before
Special weather statement, Sep 15, 12:21 PM MDT, 5 hours 3 minutes before
Special Weather Statement
National Weather Service Salt Lake City UT
1221 PM MDT Tue Sep 15 2026
UTZ128-151900-
South Central Utah UT-
1221 PM MDT Tue Sep 15 2026
...A strong thunderstorm will impact portions of central Kane County
through 100 PM MDT
...
At 1220 PM MDT, Doppler radar was tracking a strong thunderstorm 9
miles north of Big Water, or 38 miles south of Escalante, moving
northeast at 20 mph.
HAZARD...Wind gusts of 50 to 55 mph and nickel 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.
This storm will remain over mainly rural areas of central Kane
County.
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 3713 11165 3715 11169 3720 11171 3717 11173
3717 11176 3725 11182 3752 11146 3722 11122
3721 11140 3719 11140 3718 11138 3710 11166
TIME...MOT...LOC 1820Z 240DEG 17KT 3721 11169
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH
CRKSpecial weather statement, Sep 15, 1:26 PM MDT, 3 hours 58 minutes before
Special Weather Statement
National Weather Service Salt Lake City UT
126 PM MDT Tue Sep 15 2026
UTZ131-152000-
Glen Canyon Recreation Area/Lake Powell UT-
126 PM MDT Tue Sep 15 2026
...A strong thunderstorm will impact portions of southeastern Kane
County through 200 PM MDT
...
At 126 PM MDT, Doppler radar was tracking a strong thunderstorm 10
miles south of Big Water, or 49 miles east of Kanab, moving northeast
at 20 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.
This storm will remain over mainly rural areas of southeastern Kane
County.
This includes US Route 89 between mile markers 0 and 3.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3700 11166 3709 11158 3709 11155 3711 11155
3700 11143
TIME...MOT...LOC 1926Z 236DEG 16KT 3692 11165
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
JACSpecial weather statement, Sep 15, 1:58 PM MDT, 3 hours 26 minutes before
Special Weather Statement
National Weather Service Salt Lake City UT
158 PM MDT Tue Sep 15 2026
UTZ131-152030-
Glen Canyon Recreation Area/Lake Powell UT-
158 PM MDT Tue Sep 15 2026
...A strong thunderstorm will impact portions of south central San
Juan and east central Kane Counties through 230 PM MDT
...
At 158 PM MDT, Doppler radar was tracking a strong thunderstorm 17
miles south of Halls Crossing, or 51 miles west of Mexican Hat,
moving northeast at 20 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.
This storm will remain over mainly rural areas of south central San
Juan and east central Kane Counties.
This storm will be capable of producing strong gusty winds on Lake
Powell. 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.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3724 11091 3739 11070 3731 11069 3730 11065
3726 11064 3725 11057 3721 11054 3719 11061
3720 11062 3718 11064 3712 11083
TIME...MOT...LOC 1958Z 235DEG 19KT 3722 11080
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
JACLocal storm report, Sep 15, 2:31 PM MDT, 2 hours 53 minutes before
Preliminary Local Storm Report
National Weather Service Salt Lake City UT
231 PM MDT Tue Sep 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0210 PM Tstm Wnd Gst 2 S Junction 38.22N 112.23W
09/15/2026 M66 MPH Piute UT Mesonet
Mesonet station PC172 Junction South.
&&
CRKLocal storm report, Sep 15, 3:27 PM MDT, 1 hour 57 minutes before
Preliminary Local Storm Report
National Weather Service Salt Lake City UT
327 PM MDT Tue Sep 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0319 PM Flash Flood 20 W Big Water 37.02N 112.03W
09/15/2026 Kane UT Trained Spotter
Coyote Wash flashing across House Rock
Valley Road south of Wire Pass Trailhead.
&&
CRKThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 11:58 AM MDT | Flood Watch | SLC | Beaver, Carbon, Duchesne, Emery, Garfield, Iron and 11 more | 58 hr |
| Sep 15, 12:21 PM MDT | Special Weather Statement | SLC | Kane | 39 min |
| Sep 15, 12:29 PM MDT | Severe Thunderstorm Warning | SLC | Kane | 46 min |
| Sep 15, 12:35 PM MDT | Flash Flood Warning | SLC | Kane | 3 hr |
| Sep 15, 1:26 PM MDT | Special Weather Statement | SLC | Kane | 34 min |
| Sep 15, 1:42 PM MDT | Flash Flood Warning | SLC | Kane | 3 hr |
| Sep 15, 1:58 PM MDT | Special Weather Statement | SLC | 32 min | |
| Sep 15, 4:41 PM MDT | Flash Flood Warning | SLC | Emery | 4 hr |
Nearby
Flash Flood Warnings in Utah, 2026Every flash flood warning in 2026
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.