Flash Flood Warning 1, NWS Salt Lake City, UT

501 
WGUS75 KSLC 032302
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
502 PM MDT Tue Jun 3 2025

UTC053-040030-
/O.CON.KSLC.FF.W.0001.000000T0000Z-250604T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Washington UT-
502 PM MDT Tue Jun 3 2025

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM MDT THIS 
EVENING FOR CENTRAL WASHINGTON COUNTY...

At 502 PM MDT, Doppler radar rainfall estimates of between 1 and 
2.25 inches of rain fell in Ash Creek and La Verkin Creek from 
earlier thunderstorms. Flash flooding is ongoing or expected to 
begin shortly, with the flood waves moving downstream both Ash and 
La Verkin Creeks to their confluence with the Virgin River.

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

SOURCE...Radar.

IMPACT...Life threatening flash flooding of creeks and streams,
         and normally dry washes in this area.

Some locations that will experience flash flooding include...
  Ash Creek, La Verkin Creek, La Verkin, Toquerville and Pintura

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Remain alert for flooding even in locations not receiving rain. Dry 
washes, streams, and rivers can become raging killer currents in a 
matter of minutes, even from distant rainfall.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 3720 11328 3720 11330 3729 11330 3733 11328
      3737 11330 3739 11322 3737 11318

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

$$

GM

789 
WGUS75 KSLC 040025
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
625 PM MDT Tue Jun 3 2025

UTC053-040035-
/O.EXP.KSLC.FF.W.0001.000000T0000Z-250604T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Washington UT-
625 PM MDT Tue Jun 3 2025

...FLASH FLOOD WARNING WILL EXPIRE AT 630 PM MDT THIS EVENING FOR 
CENTRAL WASHINGTON COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
significant threat as runoff from earlier heavy rain continues to 
recede along Ash Creek and La Verkin Creek. Please continue to heed 
any remaining closures.

&&

LAT...LON 3720 11328 3720 11330 3729 11330 3733 11328
      3737 11330 3739 11322 3737 11318

$$

LC

Area Forecast Discussion
National Weather Service Salt Lake City UT
415 AM MDT Tue Jun 3 2025

.SYNOPSIS...Unsettled pattern continues through the week, especially
for southern Utah. Drier and milder conditions with temperatures
above normal return for the weekend into early next week.

&&

.SHORT TERM (Through 12Z/6AM Thursday)...A remnant frontal boundary
is situated near the I-70 corridor this morning. With better
forcing associated with an ejecting trough lessening, shower
activity near this boundary has more or less ceased. Morning water
vapor loop otherwise shows a broader scale trough across much of
the northern states along with a cutoff low churning just off the
lower California coast. The interaction between the aforementioned
forecast features will serve as the primary forecast influence
over the next couple of days.

For Tuesday, cooler afternoon highs are expected behind the front
across the northern half of the area, while southern Utah will
see warming conditions. The remnant boundary will move minimally
through the day, and in combination with diurnal heating and some
very minor PVA in the broader trough's cyclonic flow, will see
redevelopment of isolated afternoon convection. With the extra
convergence near the boundary, anticipate coverage to be maximized
near to south of the boundary accordingly in portions of southern
Utah. Overall available moisture will be less than prior days,
and as such the drier low levels in what isolated convection does
develop will contribute to a higher based nature and attendant
gusty outflow wind threat. While HREF LPMM QPF and other model QPF
output do suggest a lower flood threat Tuesday, any sufficiently
strong cell that forms or drifts over a more sensitive location
(slot canyon, typically dry wash, slickrock area, etc.) will have
potential to be locally problematic, so those planning recreation
to any such areas should still keep an eye on the weather.

Forecast pattern remains unsettled into Wednesday as the upper
low currently off of the California coast ejects inland, phasing
to a degree with the broader northern stream trough as it does so.
Deeper moisture which was confined south of the remnant boundary
will advect further northward, and with the extra forcing from the
larger scale synoptic elements, will see diurnal heating lead to
more widespread convection. While chances will spread a bit
further north, current forecast carries best chances of
precipitation at areas generally south of the I-70 corridor.
Subcloud layers don't appear quite as dry as Tuesday, though DCAPE
~500 J/kg will still support potential for a gusty outflows from
any cells that can organize/mature sufficiently. Locally heavy
rainfall appears to be the bigger threat Wednesday, though some
uncertainty remains in how high the threat is. If clouds increase
early enough, or precipitation develops rapidly and over a wide
enough area late morning before stronger destabilization occurs,
corresponding increase in cloud cover will have potential to
provide a stabilizing effect, with lighter rain more stratiform in
nature generally more easy to be handled by appropriate
runoff/drainage basins. Less cloud cover and more time to
destabilize conversely would lead to stronger updrafts more
capable of localized heavy rain, and potential flood threat to
rain sensitive areas. The spread in CAM guidance for QPF is
unsurprisingly fairly large, though the increase in HREF LPMM
values does suggest a higher risk than that of Tuesday. All that
said, main impacts will be to those planning recreation that could
take them to any of those rain sensitive areas.

.LONG TERM (After 12Z/6AM Thursday)...A broad, weak and
disorganized trough will remain draped over the interior Western
U.S. late in the week, acting moreso to provide general
instability across the region rather than acting as a cooling
mechanism. The prevalence of south to southwest flow in the lower
levels will help to push moisture farther north through Thursday,
allowing chances for showers and thunderstorms to expand into
portions of northern Utah (pushing as far north as the Provo area
mountains). This lower level moisture will coincide with moisture
in the mid-to-upper levels, increasing the overall likelihood of
moderate to heavy rainfall. For southern areas, this means another
day of potential for flash flooding in slot canyons, slick rock,
and normally dry washes. Into central and northern Utah, we not
only continue to see the potential for flash flooding in these
similar areas, but will also see the threat expand to areas
surrounding recent burn scars. Something to pay attention to
heading through the week.

Friday through Monday the trend in the sensible weather across
the region will be warming and drying as moisture wanes and an
upstream ridge begins to encroach the West. Enough moisture should
remain in place on Friday and Saturday to generate afternoon
showers and thunderstorms over the high terrain, but with
decreasing deep layer moisture the overall threat of flash
flooding will wane. That said, if a storm lines up in the right
place, flash flooding will still be possible... but coverage of
storms and moisture content will make the overall chances much
lower than earlier in the week.

As far as temperatures go, each day is anticipated to warm by
upwards of 3-5 degrees through Sunday, bringing high temperatures
back to about 7-10 degrees above normal. Though daytime high
temperatures by Sunday and Monday will be pushing afternoon heat
risk into the "moderate", or 2 out of 5, category, overnight low
temperatures are expected to fall low enough to allow for at least
some relief for those who do not have access to artificial
cooling. At this point in time, we are not expecting to have to
issue any heat related headlines... just run on the mill hot early
season temperatures.

There is potential for a shortwave trough to translate through
the ridge early next week, which would mainly act to bring an
increase of moisture across the region. As such, will see
increasing chances for showers and thunderstorms across mainly the
northern half of the area by Tuesday.

&&

.AVIATION...KSLC...Minimal operational concerns are forecast for the
KSLC terminal through the period. Northwesterly winds will
decrease in speed through 11-12Z, becoming light out of the
southeast thereafter. South winds, with periods of light and
variable flow, will be expected for only a couple of hours before
reverting back to a north flow by 15-16Z.

.Rest of Utah and Southwest Wyoming...VFR conditions are expected
across the region today with northwesterly to westerly flow
expected across most airfields. Largely clear skies are expected
across a majority of the area, however, far southern Utah will see
mid to high level cloud cover. Isolated showers will also be
possible in the southern mountains, bringing a low end chance for
gusty and erratic outflows, mainly for areas near KBCE.

&&

.FIRE WEATHER...Lingering moisture along a largely stalled frontal
boundary will result in the redevelopment of isolated convection
across southern Utah Tuesday afternoon. Combination of an upper
level low lifting through to the south and a deepening trough from
the north will then result in more widespread activity both
Wednesday and Thursday afternoon, with activity spreading a bit
further north. This pattern will then support at least one more
day of scattered afternoon convection Friday before ridging takes
back over as a more dominant influence, subduing higher
precipitation chances. Wednesday and Thursday appear to show the
more favorable odds for wetting rains, largely at areas south of
the I-70 corridor. Any convection each day will carry the threat
of lightning and gusty erratic outflow winds as well. As high
pressure increases influence through the weekend, afternoon
minimum relative humidity values drop and temperatures return to
above normal levels for early June.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...None.
WY...None.
&&

SHORT TERM...Warthen
LONG TERM...Webber
AVIATION...Webber
FIRE WEATHER...Warthen

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

Special Weather Statement
National Weather Service Salt Lake City UT
118 PM MDT Tue Jun 3 2025

UTZ128-032000-
South Central Utah UT-
118 PM MDT Tue Jun 3 2025

...A strong thunderstorm will impact portions of central Kane County
through 200 PM MDT
...

At 118 PM MDT, Doppler radar was tracking a strong thunderstorm 18
miles southeast of Henrieville, or 32 miles southwest of Escalante,
moving east at 15 mph.

HAZARD...Wind gusts up to 50 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.

This storm will remain over mainly rural areas of central Kane
County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

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 3726 11192 3740 11191 3743 11149 3721 11150
TIME...MOT...LOC 1918Z 273DEG 13KT 3733 11183

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

JCW

Special Weather Statement
National Weather Service Salt Lake City UT
139 PM MDT Tue Jun 3 2025

UTZ131-032030-
Glen Canyon Recreation Area/Lake Powell UT-
139 PM MDT Tue Jun 3 2025

...A strong thunderstorm will impact portions of east central
Garfield and northeastern San Juan Counties through 230 PM MDT
...

At 139 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles south of Hite Marina, or 42 miles south of Hanksville, moving
east at 10 mph.

HAZARD...Wind gusts up to 50 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.

This storm will remain over mainly rural areas of east central
Garfield and northeastern San Juan Counties.

This includes Utah Route 95 between mile markers 50 and 54.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

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 3785 11034 3778 11034 3777 11038 3773 11038
      3774 11051 3785 11050 3790 11017 3786 11018
TIME...MOT...LOC 1939Z 270DEG 10KT 3780 11044

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

JCW

Special Weather Statement
National Weather Service Salt Lake City UT
208 PM MDT Tue Jun 3 2025

UTZ128-032100-
South Central Utah UT-
208 PM MDT Tue Jun 3 2025

...A strong thunderstorm will impact portions of central Kane County
through 300 PM MDT
...

At 207 PM MDT, Doppler radar was tracking a strong thunderstorm 15
miles northwest of Big Water, or 30 miles northwest of Page, moving
east at 15 mph.

HAZARD...Wind gusts up to 50 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.

This storm will remain over mainly rural areas of central Kane
County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

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 3718 11171 3720 11171 3719 11173 3723 11185
      3733 11180 3733 11145 3721 11141 3711 11151
TIME...MOT...LOC 2007Z 280DEG 11KT 3728 11177

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

JCW

Special Weather Statement
National Weather Service Salt Lake City UT
230 PM MDT Tue Jun 3 2025

UTZ122-125-032115-
Southwest Utah UT-Southern Mountains UT-
230 PM MDT Tue Jun 3 2025

...A strong thunderstorm will impact portions of north central
Washington and south central Iron Counties through 315 PM MDT
...

At 228 PM MDT, Doppler radar was tracking a strong thunderstorm 11
miles west of New Harmony, or 26 miles southwest of Cedar City,
moving southeast at 10 mph.

HAZARD...Wind gusts up to 50 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...
New Harmony, Pinto, and Pine Valley.

This includes the following highways...
 Interstate 15 near mile marker 43.
 Utah Route 18 between mile markers 28 and 33.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

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 3745 11367 3757 11358 3750 11321 3729 11334
TIME...MOT...LOC 2028Z 295DEG 10KT 3750 11351

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

JCW

Special Weather Statement
National Weather Service Salt Lake City UT
304 PM MDT Tue Jun 3 2025

UTZ122>125-032145-
Southwest Utah UT-Southern Mountains UT-Zion National Park UT-
Lower Washington County UT-
304 PM MDT Tue Jun 3 2025

...A strong thunderstorm will impact portions of east central
Washington County through 345 PM MDT
...

At 304 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles north of La Verkin, or 12 miles west of Zion National Park.
This storm was nearly stationary.

HAZARD...Wind gusts up to 50 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...
Zion National Park, La Verkin, and Pintura.

This includes Interstate 15 between mile markers 30 and 38.

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 3733 11333 3743 11327 3738 11298 3718 11310
TIME...MOT...LOC 2104Z 296DEG 4KT 3735 11324

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

JCW

Special Weather Statement
National Weather Service Salt Lake City UT
316 PM MDT Tue Jun 3 2025

UTZ122-125-032200-
Southwest Utah UT-Southern Mountains UT-
316 PM MDT Tue Jun 3 2025

...A strong thunderstorm will impact portions of north central
Washington County through 400 PM MDT
...

At 315 PM MDT, Doppler radar was tracking a strong thunderstorm 11
miles west of New Harmony, or 28 miles southwest of Cedar City,
moving east at 5 mph.

HAZARD...Wind gusts up to 50 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...
New Harmony and Pine Valley.

This includes Utah Route 18 between mile markers 24 and 31.

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 3739 11368 3752 11361 3752 11325 3728 11339
TIME...MOT...LOC 2115Z 290DEG 5KT 3746 11352

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

JCW