Utah, 2023

Flash Flood in Utah, March 15, 2023

March 15, 2023 · NWS SLC · 1 event in 1 county or zone

Another system in an active period resulted in periods of moderate to heavy rainfall across southern Utah, resulting in isolated flash flooding.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS SLC wrote it up.

Another system in an active period resulted in periods of moderate to heavy rainfall across southern Utah, resulting in isolated flash flooding.

What forecasters said that day

The local office's own words before the first event, 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 the first event at Mar 15, 2:25 AM MST, 6 hours 5 minutes earlier.

Area forecast discussion, Mar 15, 2:25 AM MST, 6 hours 5 minutes before
Area Forecast Discussion
National Weather Service Salt Lake City UT
325 AM MDT Wed Mar 15 2023

.SYNOPSIS...A winter storm with heavy mountain snow, gusty winds
and the potential for moderate to heavy rain on areas with deep
snowpack will cross the area Tuesday into Thursday. The active
pattern will continue into the next week.

&&

.SHORT TERM (Through 12Z Friday)...A significant winter storm is
in progress across the region early this morning. Morning upper
air and satellite analysis indicates several shortwave troughs
impacting the area, one crossing Nevada and the final, strongest
shortwave crossing eastern Oregon and Washington. A pronounced
atmospheric river is noted, with areas of very heavy precipitation
from southern California into Nevada and Arizona, beginning to
once again encroach on southwestern Utah. Meanwhile across
northern Utah, a well forced band of heavy precipitation (largely
mountain snow and valley rain with snow levels near 6500 feet or
so) is stretching from roughly Wendover to Bear Lake.

Let's start with northern and central Utah as there are two
different storm modes; one for northern and central Utah and one
for southern Utah. As the first shortwave moves through the area,
moderate to heavy precipitation will continue across portions of
northern and central Utah into the morning. Observations have
noted wind gusts to 50 mph or so as the band has approached
portions of the northern valleys. Some northern valleys are seeing
rainfall rates around 0.10-0.20 inches per hour. Will continue to
monitor these heavy rainfall rates in areas with large remaining
snowpack as rain on snow flooding remains possible, particularly
for the Cache and Wasatch Back. Recent radar trends over the last
15 minute show some intensification of this band.

This band of moderate to heavy precipitation will shift south and
east with time through the morning, reaching by late morning.

The cold front will cross northern Utah late this morning into
this afternoon displaced behind this initial band of precipitation,
largely bringing an end to most valley precipitation. Mountains
may continue to see snow showers into the evening. Given the
abrupt dry air advection behind this second shortwave, have opted
to end the winter storm warnings/winter weather advisories for the
northern and central mountains early, around 9 PM tonight. Padded
this a bit due to variation in guidance, but it's entirely
possible the warning could be cancelled as early as 4 PM.

Aside from wind gusts associated with the band of moderate to
heavy precipitation, winds are well below wind advisory criteria
in the western valleys. However, given winds have gusted up to 55
mph in association with this band, opted to leave the wind
advisories up for now...but may be able to cancel these before the
day shift arrives.

For southern Utah...the forecast will unfold quite a bit
differently. RADAR returns show increasing coverage of
precipitation this morning associated with deep moisture advection.
Expect this to continue over the next few hours, with widespread
valley rain and mountain snow near or above 8000 feet through
noon. By this time, the best forcing associated with the banded
precipitation up north this morning will shift into southern Utah.
With afternoon heating and steep lapse rates, expect the
potential for thunderstorms this afternoon and evening,
particularly across southwestern and south central Utah. After a
morning of moderate to heavy rainfall, this could further
exacerbate any flooding issues. CAMs indicate the threat for an
additional 0.25-0.50" (10th/90th percentile) of precipitation
with locally higher amounts during the convective mode of this
system...after similar amounts this morning.

Current CBRFC forecasts for the Virgin River indicate the river
may approach flood stage for a time near Bloomington with stout
rises on many of the waterways across southwestern Utah. A flood
watch remains in effect for Zion National Park. Expect all
streams, dry washes, slot canyons and other waterways across
southern Utah below 7500 feet or so to be running high and fast
today. Will need to monitor for potential flash flood warnings
with any convection.

Those with any potential outdoor plans across southern Utah should
monitor the forecast and consider postponing plans that include
travel near waterways including slot canyons and normally dry
washes. Enhanced snowmelt combined with rain can be dangerous in
slot canyons.

Expect convection to continue across southwestern Utah into the
evening. Precipitation will gradually end from west to east
Thursday morning across southern Utah.

.LONG TERM (After 12Z Friday)...An active pattern continues for
the long term as a series of shortwaves and a longwave trough move
through the area. Temperatures throughout this period are
expected to be 8 to 15 degrees below normal. Beginning on Friday,
conditions will be dry and quiet as the region is under a
shortwave ridge.

Heading into the weekend, a series of shortwave troughs will
increase the chance at seeing precipitation across the CWA. The
first shortwave arrives Saturday and this currently isn't being
picked up by all of the guidance. Forty percent of ensembles have
this impacting southern Utah but of that 40%, the majority of this
percentage comes from the EPS. The GFS/GEFS have a shortwave
moving through but having minimal impacts. In addition, the
columns remain relatively dry so precipitation would have a hard
time reaching the surface.

By Sunday a stronger shortwave moves through the area. The total
percentage of ensembles that have a wet solution for this
shortwave is ~80%. With columns getting more moist, the chances of
precipitation reaching the surface increases. PWAT values also
increase to 0.25" and 0.40". This shortwave would be focused over
southern Utah. The last shortwave has about a 45% chance of
bringing precipitation to some area of Utah. As far as the exact
location of where precipitation occurs is still in question as
guidance differs on this topic. Some ensembles bring moisture to
northern Utah and others southern Utah. Another area of
uncertainty is the precipitation type. Currently the forecasted
700mb temperatures are around -8 degrees C, which means snow could
reach valley floors, but there are other factors such as
southerly flow and warmer temperatures to also consider. At the
moment going with rain as the predominant p-type for valley floors
and wintry mix/snow for benches.

After these shortwaves pass through, a longwave trough sets up
over the area and brings back the chance of seeing another AR
event on Tuesday and Wednesday as southwest flow and increased
moisture move over the area. This AR would send moisture around
the south end of the Sierra Nevadas. This is something to monitor
as it is about a week away so the forecast is most likely going to
change as future model runs come in.

&&

.AVIATION...KSLC...Rain will begin between 11Z and 13Z and
continue through ~17Z. MVFR conditions and mountain obscuration
are likely during precipitation. IFR conditions could occur due to
lowered visibilities and CIGS from heavier precipitation rates.
There is also a 15% chance of thunder along this line of
precipitation. Scattered showers will continue until ~19Z. Gusty
southerly winds will transition to northwesterly winds around 13Z
as a cold front moves through with the line of precipitation.
Winds could become variable while it is raining. Skies should
clear up by the afternoon.

.REST OF UTAH AND SOUTHWEST WYOMING...Gusty southerly to
southwesterly flow will continue across much of the area ahead of
the passage of a cold front. This cold front will bring a line of
precipitation southeastward across the CWA throughout the morning
and afternoon. Most locations will see rain but mountain valleys
and higher elevations will see snow. Southern Utah will see rain
for much of the day ahead of the front. MVFR conditions are likely
during the frontal passage with IFR conditions possible depending
on the precipitation rates. CIGS will stay between 4kft and 7kft.
Thunder will also be possible along the line.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...Wind Advisory until noon MDT today for UTZ101-102-115-122.

     Winter Storm Warning until 9 PM MDT this evening for UTZ110>112.

     Winter Weather Advisory until 9 PM MDT this evening for UTZ113-
     117.

     Flood Watch through Thursday afternoon for UTZ124.

     Winter Storm Warning until 6 AM MDT Thursday for UTZ125.

WY...None.
&&

Kruse/Cecava

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

In the hours before

Local storm report, Mar 15, 3:01 AM MST, 5 hours 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
401 AM MDT WED MAR 15 2023

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

0405 PM     NON-TSTM WND GST SALT LAKE CITY          40.77N 111.95W
03/14/2023  M46 MPH          SALT LAKE          UT   ASOS

            SALT LAKE INTL AIRPORT - 4226 FT

0410 PM     NON-TSTM WND GST LAKE POINT              40.69N 112.26W
03/14/2023  M45 MPH          TOOELE             UT   MESONET

            LAKE POINT I-80 - 4248 FT

0410 PM     NON-TSTM WND GST WEST VALLEY CITY        40.72N 112.03W
03/14/2023  M48 MPH          SALT LAKE          UT   MESONET

            SR-85 AT SR-201 - 4260 FT

0415 PM     NON-TSTM WND GST PICKELVILLE             41.92N 111.51W
03/14/2023  M48 MPH          CACHE              UT   MESONET

            PETER SINKS RIM - 8434 FT

0415 PM     NON-TSTM WND GST TRIAL LK                40.84N 111.02W
03/14/2023  M57 MPH          SUMMIT             UT   MESONET

            WINDY PEAK - 10662 FT

0340 AM     NON-TSTM WND GST LAKE POINT              40.72N 112.23W
03/15/2023  M66 MPH          TOOELE             UT   MESONET

            SR-201 AT I-80 - 4272 FT

0420 PM     NON-TSTM WND GST SALT LAKE CITY          40.77N 111.95W
03/14/2023  M42 MPH          SALT LAKE          UT   MESONET

            I-215 AT I-80 - 4262 FT

0420 PM     NON-TSTM WND GST CEDAR CITY              37.73N 113.05W
03/14/2023  M43 MPH          IRON               UT   MESONET

            I-15 AT MP 62.5 CEDAR CITY - 5760 FT

0425 PM     NON-TSTM WND GST PROMONTORY PT           41.15N 112.33W
03/14/2023  M53 MPH          WEBER              UT   MESONET

            FREMONT ISLAND - MILLER HILL - 4700 FT

0430 PM     NON-TSTM WND GST MILFORD                 38.42N 113.01W
03/14/2023  M40 MPH          BEAVER             UT   ASOS

            MILFORD MUNICIPAL AIRPORT - 5034 FT

0431 PM     NON-TSTM WND GST HILL AFB                41.12N 111.97W
03/14/2023  M40 MPH          DAVIS              UT   ASOS

            HILL AIR FORCE BASE - 4787 FT

0350 AM     NON-TSTM WND GST EMIGRATION CANYON       40.73N 111.77W
03/15/2023  M55 MPH          SALT LAKE          UT   MESONET

            PARLEYS CANYON AT QUARRY - 5126 FT

0435 PM     NON-TSTM WND GST SALINE                  41.07N 112.59W
03/14/2023  M42 MPH          BOX ELDER          UT   MESONET

            HAT ISLAND - 4242 FT

0440 PM     NON-TSTM WND GST EMIGRATION CANYON       40.77N 111.77W
03/14/2023  M45 MPH          SALT LAKE          UT   MESONET

            EMIGRATION CANYON - 5314 FT

0440 PM     NON-TSTM WND GST DELLE                   40.77N 112.80W
03/14/2023  M44 MPH          TOOELE             UT   MESONET

            I-80 AT MP 68 WEST DELLE - 4273 FT

0440 PM     NON-TSTM WND GST SUNDANCE                40.37N 111.59W
03/14/2023  M59 MPH          UTAH               UT   MESONET

            SUNDANCE - ARROWHEAD - 8251 FT

0440 PM     NON-TSTM WND GST EMIGRATION CANYON       40.74N 111.74W
03/14/2023  M46 MPH          SALT LAKE          UT   MESONET

            MT AIRE CANYON - 5523 FT

0450 PM     NON-TSTM WND GST POWDER MTN              41.31N 111.63W
03/14/2023  M42 MPH          WEBER              UT   MESONET

            EVERGREEN PARK - 6153 FT

0450 PM     NON-TSTM WND GST NORDIC VLY              41.37N 111.76W
03/14/2023  M55 MPH          WEBER              UT   MESONET

            POWDER MOUNTAIN - 8897 FT

0340 AM     NON-TSTM WND GST ARAGONITE               40.76N 113.01W
03/15/2023  M53 MPH          TOOELE             UT   MESONET

            I-80 AT GRASSEY - 4677 FT

0512 PM     NON-TSTM WND GST SMITHFIELD              41.87N 111.81W
03/14/2023  M45 MPH          CACHE              UT   MESONET

            CROW MOUNTAIN - 5646 FT

0515 PM     NON-TSTM WND GST POWDER MTN              41.37N 111.75W
03/14/2023  M41 MPH          WEBER              UT   MESONET

            MARYS LIFT - 8890 FT

0520 PM     NON-TSTM WND GST UINTAH                  41.14N 111.89W
03/14/2023  M47 MPH          WEBER              UT   MESONET

            WEBER CANYON POWER PLANT - 4635 FT

0525 PM     NON-TSTM WND GST LAKE POINT              41.33N 112.85W
03/14/2023  M42 MPH          BOX ELDER          UT   MESONET

            GUNNISON ISLAND - 4242 FT

0530 PM     NON-TSTM WND GST SNOWBASIN               41.20N 111.88W
03/14/2023  M64 MPH          WEBER              UT   MESONET

            OGDEN PEAK - 9570 FT

0330 AM     NON-TSTM WND GST SNOWBASIN               41.20N 111.86W
03/15/2023  M58 MPH          WEBER              UT   MESONET

            SNOWBASIN - WILDCAT - 7703 FT

0530 PM     NON-TSTM WND GST RIVERDALE               41.19N 112.02W
03/14/2023  M45 MPH          WEBER              UT   ASOS

            OGDEN - HINCKLEY AIRPORT - 4440 FT

0533 PM     NON-TSTM WND GST PARADISE                41.55N 111.85W
03/14/2023  M49 MPH          CACHE              UT   MESONET

            PARADISE - 5492 FT

0540 PM     NON-TSTM WND GST WELLSVILLE              41.61N 111.95W
03/14/2023  M62 MPH          CACHE              UT   MESONET

            MURRAYS HILL - 5686 FT

0540 PM     NON-TSTM WND GST RICHFIELD               38.77N 112.10W
03/14/2023  M40 MPH          SEVIER             UT   MESONET

            I-70 AT RICHFIELD - 5422 FT

0555 PM     NON-TSTM WND GST DUGWAY                  40.30N 112.78W
03/14/2023  M43 MPH          TOOELE             UT   MESONET

            CEDAR MOUNTAIN - 4650 FT

0600 PM     NON-TSTM WND GST LOGAN                   41.74N 111.81W
03/14/2023  M47 MPH          CACHE              UT   MESONET

            US-89 AT USU - 4787 FT

0600 PM     NON-TSTM WND GST MANTUA                  41.55N 111.95W
03/14/2023  M42 MPH          CACHE              UT   MESONET

            SARDINE SUMMIT - 5890 FT

0610 PM     NON-TSTM WND GST EAGLE MOUNTAIN          40.28N 111.94W
03/14/2023  M49 MPH          UTAH               UT   MESONET

            LAKE MOUNTAIN - 7675 FT

0620 PM     NON-TSTM WND GST WELLSVILLE              41.58N 111.98W
03/14/2023  M55 MPH          CACHE              UT   MESONET

            SHERWOOD HILLS - 5658 FT

0215 AM     NON-TSTM WND GST SNOWBASIN               41.19N 111.87W
03/15/2023  M76 MPH          WEBER              UT   MESONET

            SNOWBASIN-STRAW TOP - 8999 FT

0635 PM     NON-TSTM WND GST CALLAO                  39.90N 113.34W
03/14/2023  M41 MPH          JUAB               UT   MESONET

            FISH SPRINGS - 4282 FT

0637 PM     NON-TSTM WND GST TINTIC                  39.86N 112.24W
03/14/2023  M41 MPH          JUAB               UT   MESONET

            MUD SPRING - 5902 FT

0240 AM     NON-TSTM WND GST BAUER                   40.47N 112.36W
03/15/2023  M54 MPH          TOOELE             UT   MESONET

            STOCKTON NORTH - 5213 FT

0645 PM     NON-TSTM WND GST IOSEPA                  40.53N 112.76W
03/14/2023  M42 MPH          TOOELE             UT   MESONET

            GRANTSVILLE - AGRIMET GRTU - 4365 FT

0650 PM     NON-TSTM WND GST BAUER                   40.47N 112.35W
03/14/2023  M58 MPH          TOOELE             UT   MESONET

            SR-36 AT MP 49 STOCKTON BAR - 5236 FT

0700 PM     NON-TSTM WND GST ALTA                    40.57N 111.64W
03/14/2023  M67 MPH          SALT LAKE          UT   MESONET

            CENTRAL WASATCH PEAKS - 11066 FT

0300 AM     NON-TSTM WND GST ALTA                    40.57N 111.63W
03/15/2023  M58 MPH          SALT LAKE          UT   MESONET

            CENTRAL WASATCH PEAKS - 10443 FT

0708 PM     NON-TSTM WND GST MONROE                  38.63N 112.06W
03/14/2023  M45 MPH          SEVIER             UT   MESONET

            SIGNAL PEAK - 8767 FT

0730 PM     NON-TSTM WND GST HAMILTONS FT            37.65N 113.17W
03/14/2023  M47 MPH          IRON               UT   MESONET

            WEST CEDAR - 5481 FT

0730 PM     NON-TSTM WND GST HAMILTONS FT            37.63N 113.12W
03/14/2023  M43 MPH          IRON               UT   MESONET

            I-15 AT HAMILTONS FORT - 5745 FT

0740 PM     NON-TSTM WND GST FREMONT JCT             38.78N 111.32W
03/14/2023  M44 MPH          SEVIER             UT   MESONET

            FREMONT JUNCTION - 6537 FT

0740 PM     NON-TSTM WND GST MAMMOTH                 39.94N 112.11W
03/14/2023  M50 MPH          JUAB               UT   MESONET

            EUREKA RIDGE - 7872 FT

0740 PM     NON-TSTM WND GST ALTA                    40.66N 111.65W
03/14/2023  M48 MPH          SALT LAKE          UT   MESONET

            REYNOLDS PEAK - 9400 FT

0745 PM     NON-TSTM WND GST ALTA                    40.56N 111.64W
03/14/2023  M72 MPH          SALT LAKE          UT   MESONET

            CENTRAL WASATCH PEAKS - 10994 FT

0750 PM     NON-TSTM WND GST ALTA                    40.59N 111.65W
03/14/2023  M48 MPH          SALT LAKE          UT   MESONET

            CARDIFF PEAK - 10059 FT

0750 PM     NON-TSTM WND GST MT OLYMPUS              40.69N 111.77W
03/14/2023  M46 MPH          SALT LAKE          UT   MESONET

            MILLCREEK CANYON - 5258 FT

0800 PM     NON-TSTM WND GST CEDAR CITY              37.65N 113.12W
03/14/2023  M43 MPH          IRON               UT   MESONET

            CROSS HOLLOW - 6010 FT

0800 PM     NON-TSTM WND GST CEDAR CITY              37.64N 113.06W
03/14/2023  M58 MPH          IRON               UT   MESONET

            CEDAR HIGHLANDS - 6807 FT

0800 PM     NON-TSTM WND GST ALTA                    40.60N 111.61W
03/14/2023  M41 MPH          SALT LAKE          UT   MESONET

            SOLITUDE HONEYCOMB PEAK - 10488 FT

0810 PM     NON-TSTM WND GST HOLLADAY                40.68N 111.80W
03/14/2023  M40 MPH          SALT LAKE          UT   MESONET

            I-215 AT OLYMPUS COVE - 4972 FT

0810 PM     NON-TSTM WND GST DOLOMITE                40.73N 112.60W
03/14/2023  M41 MPH          TOOELE             UT   MESONET

            I-80 AT MP 79 TIMPIE - 4215 FT

0815 PM     NON-TSTM WND GST BLUFFDALE               40.46N 111.90W
03/14/2023  M49 MPH          SALT LAKE          UT   MESONET

            FLIGHT PARK SOUTH - 5202 FT

0820 PM     NON-TSTM WND GST BLUFFDALE               40.48N 111.90W
03/14/2023  M45 MPH          SALT LAKE          UT   MESONET

            BLUFFDALE - 4679 FT

0820 PM     NON-TSTM WND GST COVE FT                 38.64N 112.61W
03/14/2023  M44 MPH          MILLARD            UT   MESONET

            DOG VALLEY - 6168 FT

0820 PM     NON-TSTM WND GST SOUTH SALT LAKE         40.72N 111.90W
03/14/2023  M41 MPH          SALT LAKE          UT   MESONET

            I-15 AT 2400 S - 4265 FT

1250 AM     NON-TSTM WND GST PARK CITY               40.61N 111.53W
03/15/2023  M69 MPH          SUMMIT             UT   MESONET

            DEER VLY - EMPIRE PK - 9570 FT

0830 PM     NON-TSTM WND GST DUGWAY                  40.23N 112.73W
03/14/2023  M45 MPH          TOOELE             UT   MESONET

            ENGLISH VILLAGE - 4788 FT

0830 PM     NON-TSTM WND GST KANARRAVILLE            37.48N 113.22W
03/14/2023  M41 MPH          IRON               UT   MESONET

            I-15 AT BLACK RIDGE - 5196 FT

0830 PM     NON-TSTM WND GST DUGWAY                  40.25N 112.73W
03/14/2023  M43 MPH          TOOELE             UT   MESONET

            SR-196 AT MP 2 DUGWAY - 4838 FT

0830 PM     NON-TSTM WND GST CALLAO                  39.95N 113.70W
03/14/2023  M42 MPH          TOOELE             UT   MESONET

            CALLAO - 4530 FT

0830 PM     NON-TSTM WND GST HERRIMAN                40.50N 112.07W
03/14/2023  M47 MPH          SALT LAKE          UT   MESONET

            HERRIMAN WEST - 4350 FT

0835 PM     NON-TSTM WND GST DUGWAY                  40.12N 112.95W
03/14/2023  M46 MPH          TOOELE             UT   MESONET

            CAMEL BACK MTN - 5077 FT

0835 PM     NON-TSTM WND GST SUNCREST                40.62N 111.99W
03/14/2023  M44 MPH          SALT LAKE          UT   AWOS

            SALT LAKE MUNI 2 AIRPORT - 4603 FT

1037 PM     NON-TSTM WND GST GLENWOOD                38.78N 111.87W
03/14/2023  M53 MPH          SEVIER             UT   MESONET

            LOST CREEK - 7490 FT

0840 PM     NON-TSTM WND GST GRANTSVILLE             40.56N 112.48W
03/14/2023  M59 MPH          TOOELE             UT   MESONET

            GRANTSVILLE SOUTH - 4630 FT

0840 PM     NON-TSTM WND GST TOOELE                  40.55N 112.34W
03/14/2023  M54 MPH          TOOELE             UT   MESONET

            SR-112 @ MP 6 UTAH AVENUE - 4721 FT

0840 PM     NON-TSTM WND GST BLUFFDALE               40.45N 111.91W
03/14/2023  M45 MPH          SALT LAKE          UT   MESONET

            POINT OF THE MOUNTAIN - 4796 FT

0845 PM     NON-TSTM WND GST DUGWAY                  40.11N 112.81W
03/14/2023  M53 MPH          TOOELE             UT   MESONET

            DURAND ROAD - 4538 FT

0850 PM     NON-TSTM WND GST OREM                    40.31N 111.56W
03/14/2023  M43 MPH          UTAH               UT   MESONET

            BUNNELLS - 8800 FT

0850 PM     NON-TSTM WND GST TAYLORSVILLE            40.68N 111.95W
03/14/2023  M43 MPH          SALT LAKE          UT   MESONET

            I-215 AT MP 16 TAYLORSVILLE - 4293 FT

0850 PM     NON-TSTM WND GST PERRY                   41.44N 112.06W
03/14/2023  M46 MPH          BOX ELDER          UT   MESONET

            I-15 AT WILLARD POE - 4233 FT

0856 PM     NON-TSTM WND GST WENDOVER                40.73N 114.03W
03/14/2023  M40 MPH          TOOELE             UT   AWOS

            WENDOVER FIELD - 4236 FT

0300 AM     NON-TSTM WND GST PROVIDENCE              41.71N 111.72W
03/15/2023  M67 MPH          CACHE              UT   MESONET

            LOGAN PEAK - 9714 FT

0900 PM     NON-TSTM WND GST COPPERTON               40.58N 112.03W
03/14/2023  M41 MPH          SALT LAKE          UT   MESONET

            MOUNTAIN VIEW AT DANNON WAY - 4910 FT

0900 PM     NON-TSTM WND GST VERNON                  40.13N 112.38W
03/14/2023  M67 MPH          TOOELE             UT   MESONET

            VERNON HILL - 5761 FT

0900 PM     NON-TSTM WND GST MIDVALE                 40.64N 111.90W
03/14/2023  M44 MPH          SALT LAKE          UT   MESONET

            I-15 AT I-215 - 4345 FT

0900 PM     NON-TSTM WND GST PARK CITY               40.63N 111.53W
03/14/2023  M51 MPH          SUMMIT             UT   MESONET

            PARK CITY - SILVERLODE TOP - 9210 FT

0900 PM     NON-TSTM WND GST SULPHURDALE             38.58N 112.60W
03/14/2023  M43 MPH          MILLARD            UT   MESONET

            I-70 AT I-15 - 6052 FT

0900 PM     NON-TSTM WND GST COVE FT                 38.59N 112.49W
03/14/2023  M43 MPH          SEVIER             UT   MESONET

            CLEAR CREEK SUMMIT I70 - 7188 FT

0905 PM     NON-TSTM WND GST CRANMER                 40.61N 111.48W
03/14/2023  M56 MPH          SUMMIT             UT   MESONET

            DEER VLY  - MOUNT BALDY - 9347 FT

0905 PM     NON-TSTM WND GST DUGWAY                  40.16N 112.89W
03/14/2023  M45 MPH          TOOELE             UT   MESONET

            WHITE SAGE - 4363 FT

0910 PM     NON-TSTM WND GST BRIGHAM CITY            41.51N 112.05W
03/14/2023  M40 MPH          BOX ELDER          UT   AWOS

            BRIGHAM CITY AIRPORT - 4301 FT

0910 PM     NON-TSTM WND GST ALTA                    40.59N 111.64W
03/14/2023  M46 MPH          SALT LAKE          UT   MESONET

            ALTA - GUARD HOUSE - 8799 FT

0910 PM     NON-TSTM WND GST COTTONWOOD HGTS         40.57N 111.76W
03/14/2023  M48 MPH          SALT LAKE          UT   MESONET

            LITTLE COTTONWOOD - 5662 FT

0912 PM     NON-TSTM WND GST SALT LAKE CITY          40.77N 111.85W
03/14/2023  M45 MPH          SALT LAKE          UT   MESONET

            UNIVERSITY OF UTAH - 4806 FT

0915 PM     NON-TSTM WND GST MARSHALL                40.61N 112.35W
03/14/2023  M52 MPH          TOOELE             UT   AWOS

            TOOELE VALLEY AIRPORT - 4318 FT

0915 PM     NON-TSTM WND GST DUGWAY                  39.92N 112.94W
03/14/2023  M52 MPH          TOOELE             UT   MESONET

            SIMPSON SPRINGS - 4645 FT

0940 PM     NON-TSTM WND GST PARK CITY               40.65N 111.49W
03/14/2023  M50 MPH          SUMMIT             UT   MESONET

            AERIE - 7481 FT

0924 PM     NON-TSTM WND GST DUGWAY                  40.16N 112.89W
03/14/2023  M43 MPH          TOOELE             UT   MESONET

            DUGWAY-S - 4385 FT

0925 PM     NON-TSTM WND GST NEWHOUSE                38.31N 113.39W
03/14/2023  M45 MPH          BEAVER             UT   MESONET

            BRIMSTONE RESERVOIR - 5620 FT

1250 AM     NON-TSTM WND GST KEETLEY                 40.63N 111.38W
03/15/2023  M51 MPH          WASATCH            UT   MESONET

            SR-248 - 6900 FT

0345 AM     NON-TSTM WND GST LAKETOWN                41.75N 111.28W
03/15/2023  M51 MPH          RICH               UT   MESONET

            OTTER CREEK - 7160 FT

0600 PM     SNOW             ALTA                    40.59N 111.64W
03/14/2023  M1.4 INCH        SALT LAKE          UT   COOP OBSERVER

&&

The radar

The Cedar City radar (KICX), 107 km away, was scanning. The volume nearest the first event began at 15:28 UTC.

Open the radar archive at this moment

Event by event

1 flash flood. Local standard time, as filed.

Flash Flood, Washington

When
March 15, 8:30 AM MST to 12:30 PM MST
Where
Washington County, 2.36 mi SSW of Motoqua to 13.44 mi SSE of Motoqua
Cause
Heavy Rain
Reported by
River/Stream Gage
Coordinates
37.287, -114.011

Persistent moderate to at times heavy rain resulted in flash flooding throughout Beaver Dam Wash. For example, the Catclaw Canyon stream gage increased from a dry no-flow state of 0 CFS to a peak flow of approximately 2923 CFS. Cameras also showed water flowing in this typically dry wash.

What these are

Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Utah in 2023Every state in 2023This day in weather historyWarnings in Utah, March 2023

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1188587.