Alert archive / Utah / Flash Flood Warnings in 2026
Flash Flood Warning 78, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 13, 2026, 6:22 PM MDT for Tooele County, Utah. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 13, 2026, 6:22 PM MDT (00:22 UTC)
- Expired
- Aug 13, 2026, 9:15 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Tooele County, UT
The radar
The Salt Lake City radar (KMTX), 94 km from the middle of the area, began a volume at 00:24 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 13, 6:45 PM MDT | FLASH FLOOD | 4 Ese Stockton, UT | Tooele County Emergency Management reported a flash flood resulting in a deposit of rocks and mud 1 to 2 feet deep across Solider Canyon Rd between the first retention pond to Pipe Hollow. Time estimated and based on radar. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this flash flood warning; the first came 23 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 00:00Z, 0.4 hours before the alert went out and 51 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
- 245 J/kg
- Mixed-layer CIN
- -102 J/kg
- Mixed-layer LCL
- 1448 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted.
517
WGUS55 KSLC 140022
FFWSLC
UTC045-140315-
/O.NEW.KSLC.FF.W.0078.260814T0022Z-260814T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
622 PM MDT Thu Aug 13 2026
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
Eastern Tooele County in northern Utah...
* Until 915 PM MDT.
* At 622 PM MDT, Doppler radar indicated severe thunderstorms
producing heavy rain in The old Jacob City Burn Scar and
surrounding canyons. Between 0.5 and 0.75 inches of rain have
fallen. Additional rainfall amounts of 0.25 to 0.75 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar indicated.
IMPACT...Life threatening flash flooding of creeks, streams,
normally dry washes.
* Some locations that will experience flash flooding include...
Ophir and Stockton.
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.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 4049 11234 4047 11221 4046 11222 4034 11221
4032 11231 4044 11238
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
GM2 follow-up statements
500
WGUS75 KSLC 140144
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
744 PM MDT Thu Aug 13 2026
UTC045-140315-
/O.CON.KSLC.FF.W.0078.000000T0000Z-260814T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tooele UT-
744 PM MDT Thu Aug 13 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM MDT THIS
EVENING FOR EASTERN TOOELE COUNTY...
At 744 PM MDT, Tooele County emergency management reported a heavy
flow moving down Soldier Creek in Soldier Canyon, but it is remaining
within its banks. Between 0.5 and 1.25 inches of rain have fallen.
Flash flooding is already occurring within Soldier Creek.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Emergency management reported.
IMPACT...Life threatening flash flooding of creeks, streams, normally
dry washes.
Some locations that will experience flash flooding include...
Ophir and Stockton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Move to higher ground now. Act quickly to protect your life.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 4049 11234 4047 11221 4046 11222 4034 11221
4032 11231 4044 11238
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
GM997
WGUS75 KSLC 140307
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
907 PM MDT Thu Aug 13 2026
UTC045-140317-
/O.EXP.KSLC.FF.W.0078.000000T0000Z-260814T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tooele UT-
907 PM MDT Thu Aug 13 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 915 PM MDT THIS EVENING FOR
EASTERN TOOELE COUNTY...
The heavy rain has ended. Additional flooding is not expected to pose
a threat. Please continue to heed any remaining road closures.
&&
LAT...LON 4049 11234 4047 11221 4046 11222 4034 11221
4032 11231 4044 11238
$$
WebberWhat 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 Aug 13, 12:31 PM MDT, 5 hours 51 minutes earlier. Its key messages:
- Monsoonal moisture looks to bring daily chances for showers and thunderstorms across much of UT through Friday before drying out this weekend.
- A flash flood threat exists across southwest UT and the central UT mountains this afternoon. Confidence is highest regarding impacts across southwest UT.
- A severe weather threat exists across northern UT today with damaging winds (>58mph) as the primary threat.
Area forecast discussion, Aug 13, 12:31 PM MDT, 5 hours 51 minutes before
Area Forecast Discussion National Weather Service Salt Lake City UT 1231 PM MDT Thu Aug 13 2026 .KEY MESSAGES... - Monsoonal moisture looks to bring daily chances for showers and thunderstorms across much of UT through Friday before drying out this weekend. - A flash flood threat exists across southwest UT and the central UT mountains this afternoon. Confidence is highest regarding impacts across southwest UT. - A severe weather threat exists across northern UT today with damaging winds (>58mph) as the primary threat. && .DISCUSSION...Troughing strengthens across much of the West Coast today as ridging weakens somewhat across the southwest today enabling another monsoonal moisture push this afternoon. This will result in a flash flood threat across southwestern UT and portions of central UT this afternoon, as well as a severe weather threat across northern UT, western UT, and extreme southwestern UT. Following todays threat, conditions look to dry out through the weekend, potentially into midweek next week. An H5 trough situated over the PNW continues to deepen this afternoon with multiple shortwave perturbations progressing SW to NE across the great basin will provide ascent for multiple rounds of scattered showers and thunderstorms this afternoon across UT. Currently across southwestern UT, leftover subsidence from earlier thunderstorms this morning has resulted in a convective lull which is expected to last through around noon-2pm MT this afternoon as a deepening shortwave pushes into the state with flow enhancing aloft. The flooding threat is forecast to continue to increase with these storms through the afternoon as PWATs continue to increase, characterized by values in excess of 1.2", perhaps higher as CAM guidance has not handled this well today (i.e. recent Dugway sounding characterized by 1.3" PWATs in the West Desert), indicating that values may actually be higher across SW UT. Additionally, training storms may result in rather high rainfall rates reaching and/or exceeding 0.5"/hr. This raises concern for recent burn scars, such as Cottonwood, Forsyth, Monroe Canyon, France Canyon, Silver King, and the new Widemouth 2 burn scar. Further north, showers are ongoing across much of northern UT spurred by WAA in the midlevels. These showers will continue to dissipate through the morning, with stronger storms expected to form after 4pm MT as the shortwave impulse deepens with a 30kt H5 jet developing overhead. Strong upper diffluence is forecast to develop with perhaps multiple 50kt jet streaks developing overhead around the time of CI, resulting in EBWD values from 30-40kts this afternoon supporting the potential for a couple supercells this afternoon. The primary threat with these thunderstorms are severe wind gusts in excess of 58mph, particularly if they can root effectively within the boundary layer this afternoon. Some uncertainty regarding this exists due to persistent cloud cover, though diurnal heating with current cloud breaks supports some airmass recovery this afternoon in the midst of dewpoints in the upper 50s to low 60s. Lastly, this threat is enhanced as the early morning convection has left behind a few different outflow boundaries, in particular north of the airport toward the bountiful area as well as another potentially closer to the ID border. This will locally enhance vorticity, and with daytime heating expected to increase MLCAPE to at least 150J/kg, support some stronger and potentially longer-lived storms developing. With the ridge pushing east and dry air advecting in tomorrow with the aforementioned trough pushing in, PoPs decrease somewhat tomorrow afternoon statewide. The flash flood threat exists across far southwest UT once again as the moisture reservoir of higher PWATs remains in place, though precip will begin to favor higher terrain otherwise. Into this weekend through potentially midweek next week, mid-level moisture will remain in place as the ridge continues sliding east favoring terrain-driven thunderstorms and a lower-elevation drying trend. Ensemble guidance continues to push back the true return to monsoonal moisture, potentially after Wednesday next week. && .AVIATION, Issued 1230 PM MDT Thu Aug 13 2026... KSLC, Issued 1230 PM MDT Thu Aug 13 2026... Watching for the development of thunderstorms around the terminal this evening, with storm motion from southwest to northeast. These storms could drive some gusty and erratic winds, with the peak gusts potentially pushing 45 kts. Most likely timing remains 23-01Z though could see activity as early as 19Z and persist as late as 03Z. Storms directly overhead the terminal have the potential to produce significant heavy rainfall. A currently very low probability of overnight storms between 06-10Z exists. REST OF UTAH AND SOUTHWEST WYOMING...Showers and thunderstorms across northern Utah and southwest Wyoming persist, with recent observations indicating these cells are producing very heavy rainfall and gusty winds. There is a 5-10% chance of wind gusts in excess of 58 mph near thunderstorms this evening. For southern Utah, a lesser wind potential exists with heavy rain, low ceilings, and reduced visibility (MVFR to IFR) in these rain shafts the primary threat. && .FIRE WEATHER...A monsoonal surge will bring showers and thunderstorms with the potential for severe wind gusts (>58mph) to much of UT today as well as the potential for flash flooding across southwestern and central UT. Both severe and flash flooding threats taper off somewhat tomorrow, though afternoon thunderstorms capable of heavy rain and gusty and erratic outflow winds are expected. Humidities will begin to decrease heading into next week with lower elevation locations potentially dropping below 20% starting Monday as we continue to dry out. A return to monsoonal moisture is possible following midweek, though this remains uncertain at this time and the drying trend remains somewhat favored through the long term. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...Flood Watch through Friday morning for UTZ116-117-122>129. WY...None. && PUBLIC...Worster AVIATION...Wessler FIRE WEATHER...Worster For more information from NOAA's National Weather Service visit... http://weather.gov/saltlakecity
In the hours before
Special weather statement, Aug 13, 4:36 PM MDT, 1 hour 46 minutes before
Special Weather Statement
National Weather Service Salt Lake City UT
436 PM MDT Thu Aug 13 2026
UTZ101-115-132315-
Western Millard and Juab Counties UT-
Great Salt Lake Desert and Mountains UT-
436 PM MDT Thu Aug 13 2026
...Strong thunderstorms will impact portions of northwestern Juab and
southwestern Tooele Counties through 515 PM MDT
...
At 436 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 14 miles southwest of Utah Test and Training
Range South to 11 miles northwest of Partoun. Movement was 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...
Dugway Proving Ground Test Range, Utah Test and Training Range South,
Knolls, Clive, Ibapah, Fish Springs Wildlife Refuge, Callao, and
Trout Creek.
This includes Interstate 80 in Utah between mile markers 30 and 53.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
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 3984 11404 3998 11405 4021 11373 4076 11347
4076 11303 4001 11307 3961 11404 3984 11406
TIME...MOT...LOC 2236Z 222DEG 36KT 4033 11373 3972 11409
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH
JCWLocal storm report, Aug 13, 5:17 PM MDT, 1 hour 5 minutes before
Preliminary Local Storm Report
National Weather Service Salt Lake City UT
517 PM MDT Thu Aug 13 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0500 PM Tstm Wnd Gst 27 NE Callao 40.17N 113.35W
08/13/2026 M78 MPH Tooele UT AWOS
AWOS station KU19 26 NE Callao.
0448 PM Tstm Wnd Gst 27 NE Callao 40.17N 113.35W
08/13/2026 M62 MPH Tooele UT AWOS
AWOS station KU19 26 NE Callao.
&&Local storm report, Aug 13, 5:20 PM MDT, 1 hour 2 minutes before
Preliminary Local Storm Report
National Weather Service Salt Lake City UT
520 PM MDT Thu Aug 13 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0500 PM Tstm Wnd Gst 27 NE Callao 40.17N 113.35W
08/13/2026 M78 MPH Tooele UT AWOS
AWOS station KU19 26 NE Callao.
0510 PM Tstm Wnd Gst 18 W Dugway 40.24N 113.09W
08/13/2026 M67 MPH Tooele UT Mesonet
Mesonet station DPG09 Playa Station.
0510 PM Tstm Wnd Gst 22 W Dugway 40.20N 113.17W
08/13/2026 M62 MPH Tooele UT Mesonet
Mesonet station DPG08 Horizontal Grid.
0510 PM Tstm Wnd Gst 15 WSW Dugway 40.18N 113.02W
08/13/2026 M59 MPH Tooele UT Mesonet
Mesonet station DPG10 Baker Lab.
0510 PM Tstm Wnd Gst 23 WSW Dugway 40.15N 113.16W
08/13/2026 M59 MPH Tooele UT Mesonet
Mesonet station DPG28 Romeo & Centerline.
&&Local storm report, Aug 13, 5:22 PM MDT, 1 hour before
Preliminary Local Storm Report
National Weather Service Salt Lake City UT
522 PM MDT Thu Aug 13 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0500 PM Tstm Wnd Gst 27 NE Callao 40.17N 113.35W
08/13/2026 M78 MPH Tooele UT AWOS
AWOS station KU19 26 NE Callao.
0510 PM Tstm Wnd Gst 22 W Dugway 40.20N 113.17W
08/13/2026 M62 MPH Tooele UT Mesonet
Mesonet station DPG08 Horizontal Grid.
0510 PM Tstm Wnd Gst 18 W Dugway 40.24N 113.09W
08/13/2026 M67 MPH Tooele UT Mesonet
Mesonet station DPG09 Playa Station.
0510 PM Tstm Wnd Gst 15 WSW Dugway 40.18N 113.02W
08/13/2026 M59 MPH Tooele UT Mesonet
Mesonet station DPG10 Baker Lab.
0510 PM Tstm Wnd Gst 23 WSW Dugway 40.15N 113.16W
08/13/2026 M59 MPH Tooele UT Mesonet
Mesonet station DPG28 Romeo & Centerline.
&&Local storm report, Aug 13, 5:31 PM MDT, 51 minutes before
Preliminary Local Storm Report
National Weather Service Salt Lake City UT
531 PM MDT Thu Aug 13 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0520 PM Tstm Wnd Gst 10 WSW Dugway 40.18N 112.92W
08/13/2026 M59 MPH Tooele UT Mesonet
Mesonet station DPG01 Ditto.
0520 PM Tstm Wnd Gst 14 SW Dugway 40.12N 112.95W
08/13/2026 M58 MPH Tooele UT Mesonet
Mesonet station DPG06 Camel Back Mtn.
0520 PM Tstm Wnd Gst 15 WSW Dugway 40.18N 113.02W
08/13/2026 M68 MPH Tooele UT Mesonet
Mesonet station DPG10 Baker Lab.
0520 PM Tstm Wnd Gst 11 WSW Dugway 40.21N 112.96W
08/13/2026 M73 MPH Tooele UT Mesonet
Mesonet station DPG22 NW Decon Pad.
0520 PM Tstm Wnd Gst 12 W Dugway 40.28N 112.98W
08/13/2026 M82 MPH Tooele UT Mesonet
Mesonet station DPG23 Lower Cedar Mtn.
&&Local storm report, Aug 13, 5:49 PM MDT, 33 minutes before
Preliminary Local Storm Report
National Weather Service Salt Lake City UT
549 PM MDT Thu Aug 13 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0530 PM Tstm Wnd Gst 3 SSW Dugway 40.21N 112.78W
08/13/2026 M59 MPH Tooele UT Mesonet
Mesonet station DPG32 Dugway 32.
0525 PM Tstm Wnd Gst 10 WSW Dugway 40.18N 112.92W
08/13/2026 M63 MPH Tooele UT Mesonet
Mesonet station DPG01 Ditto.
&&The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 6:07 PM MDT | Severe Thunderstorm Warning | SLC | Salt Lake, Tooele, Utah | 53 min |
| Aug 13, 6:59 PM MDT | Special Weather Statement | SLC | Utah, Wasatch | 46 min |
| Aug 13, 7:11 PM MDT | Areal Flood Advisory | SLC | Salt Lake | 64 min |
| Aug 13, 7:53 PM MDT | Special Weather Statement | SLC | Summit, Wasatch | 52 min |
| Aug 14, 8:15 AM MDT | Special Weather Statement | SLC | Washington | 45 min |
| Aug 14, 8:27 AM MDT | Special Weather Statement | SLC | Washington | 33 min |
| Aug 14, 8:43 AM MDT | Severe Thunderstorm Warning | SLC | Washington | 21 min |
| Aug 14, 9:08 AM MDT | Flash Flood Warning | SLC | Kane, Washington | 4 hr |
| Aug 14, 9:23 AM MDT | Flash Flood Warning | SLC | Washington | 4 hr |
| Aug 14, 9:33 AM MDT | Flash Flood Warning | SLC | Washington | 4 hr |
| Aug 14, 2:15 PM MDT | Special Weather Statement | SLC | Salt Lake | 45 min |
| Aug 14, 2:40 PM MDT | Special Weather Statement | SLC | Juab | 50 min |
| Aug 14, 3:08 PM MDT | Special Weather Statement | SLC | Salt Lake | 52 min |
| Aug 14, 3:18 PM MDT | Areal Flood Advisory | SLC | Salt Lake | 117 min |
| Aug 14, 3:55 PM MDT | Special Weather Statement | SLC | Salt Lake | 50 min |
| Aug 14, 3:57 PM MDT | Areal Flood Advisory | SLC | Salt Lake | 63 min |
| Aug 14, 4:06 PM MDT | Special Weather Statement | SLC | Tooele | 39 min |
| Aug 14, 4:08 PM MDT | Special Weather Statement | SLC | Tooele | 52 min |
| Aug 14, 4:27 PM MDT | Special Weather Statement | SLC | Iron | 48 min |
| Aug 14, 4:34 PM MDT | Special Weather Statement | SLC | Juab | 41 min |
| Aug 14, 4:48 PM MDT | Special Weather Statement | SLC | Tooele | 42 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.