Severe Thunderstorm Warning 71, NWS Salt Lake City, UT

521 
WWUS55 KSLC 040242
SVSSLC

Severe Weather Statement
National Weather Service Salt Lake City UT
842 PM MDT Thu Aug 3 2023

UTC035-049-040300-
/O.CON.KSLC.SV.W.0071.000000T0000Z-230804T0300Z/
Salt Lake UT-Utah UT-
842 PM MDT Thu Aug 3 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM MDT
FOR SOUTHEASTERN SALT LAKE AND NORTHERN UTAH COUNTIES...

At 841 PM MDT, a severe thunderstorm was located over Sandy, moving 
north at 10 mph. A wind gust to 68 mph has been observed in Draper. 
In addition, 2 inch per hour rainfall rates are occurring in 
Suncrest. 

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Sandy, Murray, West Jordan, Taylorsville, South Jordan, Lehi, Draper,
Riverton, Cottonwood Heights, Midvale, Holladay, Alpine, Bluffdale,
Little Cottonwood Creek Valley, Granite, Cottonwood West, Big
Cottonwood Canyon and Little Cottonwood Canyon.

This includes Interstate 15 between mile markers 288 and 300.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4046 11174 4047 11195 4066 11197 4065 11165
TIME...MOT...LOC 0241Z 188DEG 10KT 4054 11185 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

ND

Area Forecast Discussion
National Weather Service Salt Lake City UT
353 PM MDT Thu Aug 3 2023

.SYNOPSIS...Lingering moisture in place will maintain isolated to
scattered showers and thunderstorms through tonight. A trend towards
a drier and more stable pattern can be expected Friday into next week
across the region.

&&

.SHORT TERM (THROUGH 12Z SATURDAY)...The shortwave trough that
brought heavy rain to portions of northern Utah earlier this morning
has now shifted into central Wyoming. In the wake of this low, the
airmass has become largely suppressed across north-central and
northeastern Utah. The exception is along an outflow boundary
currently extending from the southern portion of the GSL to around
KEVW where showers and thunderstorms recently developed. Otherwise,
the airmass has destabilized more across far northwest Utah and
southern Utah where thunderstorm development has been noted. Even
though PWATs are down to around 0.7 inches across southern and
central Utah, these storms are still capable of producing heavy rain
due to lingering low-level moisture. Expect the southern/central
Utah convection to gradually diminish this evening. However, the
convection across northwest Utah is expected to spread eastward and
be sustained due a subtle disturbance and influence of an upper jet
which punching into central Utah.

With a continued drying trend tomorrow, convection will become more
isolated and become increasingly confined to northern Utah. The
potential for heavy rain and associated flash flooding will also be
much lower, though not quite zero. HREF ensemble max 6-hr
precipitation still indicates some localized 0.5-1.0 inch
accumulations tomorrow afternoon, mainly across the Raft Rivers and
Uintas. Otherwise, in conjunction with the drier airmass,
temperatures will also gradually warm tomorrow.

.LONG TERM (After 12Z Saturday)...There is little to no change in
the extended forecast period as a building high pressure ridge over
the Great Basin will trend us towards a drying and cooling period.
However to start the period on Saturday and Sunday we cannot rule
out the potential for some isolated showers and storms over the
higher terrain of northern Utah and SW Wyoming where lingering low
level moisture, while on the decline, is still expected to have
precipitable water values hovering around 0.8". Further south, the
shortwave won't have as much of an influence and available moisture
will be much little to none, so dry conditions are favored.

By the start of the work week the ridge will expand northward over
the region and bringing stronger cooling and drying as the week goes
on. This will bring afternoon highs for many valleys in the upper
80s and low 90s while far southwestern UT still sits right around
100F. As the ridge slowly tracks east, the deterministic models show
several disturbances that track across southern Utah around the
ridge that could bring some stronger winds, which could result in
conditions nearing Red Flag Warning criteria Tuesday and Wednesday.

&&

.AVIATION...KSLC...Scattered showers and thunderstorms will be
possible between 01Z and 05Z. Northwest winds expected to switch to
southeast winds between 03Z and 05Z. Winds with these showers and
thunderstorms could become gusty and erratic, especially with
outflow winds. VFR conditions expected. There is a small chance
(20%) that heavy rainfall associated with these storms could produce
MVFR conditions.

.REST OF UTAH AND SOUTHWEST WYOMING...Showers and thunderstorms
expected for most of the area through the afternoon and into the
evening. Scattered showers and thunderstorms possible for northern
Utah and southwest Wyoming through 06Z. Diurnal winds expected for
the period, with the exception of gusty and erratic winds associated
with these storms. VFR conditions expected. here is a small chance
(20%) that heavy rainfall associated with these storms could produce
MVFR conditions.

&&

.FIRE WEATHER...Scattered wet thunderstorms across northern Utah
will continue into this evening. As drier air continues to move in
from the south, thunderstorms across southern Utah will diminish
later this evening. However, across the north, a few showers can be
expected to linger late into the night. With the drying trend
continuing tomorrow into the weekend, expect shower and thunderstorm
activity to become much more isolated and likely limited to the
higher terrain of northern Utah, with less of a potential for
wetting rains. Temperatures will also trend warmer during this
timeframe. Thereafter, the airmass will remain warm and generally
dry through at least the middle of next week, with a chance that far
southern Utah zones could see critical fire weather conditions due
to gusty winds and low humidities.

&&

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

WY...None.
&&

Cheng/Selbig/Cecava

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

Special Weather Statement
National Weather Service Salt Lake City UT
443 PM MDT Thu Aug 3 2023

UTZ101-032315-
Great Salt Lake Desert and Mountains UT-
443 PM MDT Thu Aug 3 2023

...A strong thunderstorm will impact portions of southwestern Box
Elder County through 515 PM MDT...

At 442 PM MDT, Doppler radar was tracking a strong thunderstorm 22
miles northwest of Utah Test and Training Range North, or 31 miles
east of Montello, moving east at 20 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds blow around unsecured objects. Minor damage to
         outdoor objects is possible.

Locations impacted include...
Utah Test and Training Range North.

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 4110 11366 4133 11371 4137 11328 4112 11325
TIME...MOT...LOC 2242Z 256DEG 17KT 4122 11358

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

ND

Special Weather Statement
National Weather Service Salt Lake City UT
451 PM MDT Thu Aug 3 2023

UTZ113-120-121-032315-
San Rafael Swell UT-Wasatch Plateau/Book Cliffs UT-Castle Country UT-
451 PM MDT Thu Aug 3 2023

...A strong thunderstorm will impact portions of northeastern Emery
and south central Carbon Counties through 515 PM MDT...

At 451 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles south of Sunnyside, or 21 miles southeast of Price, moving
northeast at 15 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Sunnyside and East Carbon.

This includes US Route 6 between mile markers 258 and 271.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3935 11039 3946 11058 3967 11043 3950 11015
TIME...MOT...LOC 2251Z 218DEG 12KT 3943 11045

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

ND

Special Weather Statement
National Weather Service Salt Lake City UT
518 PM MDT Thu Aug 3 2023

UTZ101-040000-
Great Salt Lake Desert and Mountains UT-
518 PM MDT Thu Aug 3 2023

...A strong thunderstorm will impact portions of south central Box
Elder County through 600 PM MDT...

At 518 PM MDT, Doppler radar was tracking a strong thunderstorm 19
miles north of Utah Test and Training Range North, or 44 miles east
of Montello, moving east at 20 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.

This storm will remain over mainly rural areas of south central Box
Elder 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 4119 11339 4137 11344 4146 11311 4120 11304
TIME...MOT...LOC 2318Z 259DEG 16KT 4130 11332

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH

ND

Special Weather Statement
National Weather Service Salt Lake City UT
738 PM MDT Thu Aug 3 2023

UTZ101-102-040230-
Tooele and Rush Valleys UT-Great Salt Lake Desert and Mountains UT-
738 PM MDT Thu Aug 3 2023

...A line of strong thunderstorms will impact portions of central
Tooele County through 830 PM MDT...

At 737 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 18 miles west of Utah Test and Training Range
South to 6 miles north of Dugway English Village. Movement was
northeast at 25 mph.

HAZARD...Wind gusts up to 50 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could blow around unsecured objects. Minor
         damage to outdoor objects is possible.

Locations impacted include...
Wendover, Utah Test and Training Range South, Delle, Knolls, Clive,
Skull Valley, Utah Test and Training Range North, Dugway Proving
Ground Test Range and Bonneville Salt Flats.

This includes Interstate 80 in Utah between mile markers 0 and 82.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 4099 11404 4085 11248 4025 11276 4036 11405
TIME...MOT...LOC 0137Z 230DEG 60KT 4041 11390 4032 11277

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

ND

Special Weather Statement
National Weather Service Salt Lake City UT
817 PM MDT Thu Aug 3 2023

UTZ101-105-106-111-040245-
Salt Lake Valley UT-Utah Valley UT-
Great Salt Lake Desert and Mountains UT-Wasatch Mountains South of I-
80 UT-
817 PM MDT Thu Aug 3 2023

...Strong thunderstorms will impact portions of southern Salt Lake...
northwestern Utah and eastern Tooele Counties through 845 PM MDT...

At 817 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Camp Williams to near Lehi. Movement was
northeast at 30 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...
Sandy, West Jordan, South Jordan, Lehi, Draper, Riverton, Cottonwood
Heights, Midvale, American Fork, Herriman, Eagle Mountain, Alpine,
Bluffdale, Little Cottonwood Canyon, Camp Williams, Little Cottonwood
Creek Valley, Granite, Bingham Canyon Mine, Oquirrh and Big
Cottonwood Canyon.

This includes Interstate 15 between mile markers 280 and 297.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4063 11210 4061 11164 4038 11180 4039 11224
TIME...MOT...LOC 0217Z 219DEG 36KT 4045 11209 4044 11184

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

ND

Special Weather Statement
National Weather Service Salt Lake City UT
825 PM MDT Thu Aug 3 2023

UTZ101-102-040315-
Tooele and Rush Valleys UT-Great Salt Lake Desert and Mountains UT-
825 PM MDT Thu Aug 3 2023

...A line of strong thunderstorms will impact portions of
southwestern Box Elder and northern Tooele Counties through 915 PM
MDT...

At 825 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Wendover to near Skull Valley. Movement
was northeast at 25 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Wendover, Delle, Knolls, Utah Test and Training Range North, Clive,
Skull Valley, Utah Test and Training Range South, Great Salt Lake
South of the Causeway, Hat Island, Lucin and Bonneville Salt Flats.

This includes the following highways...
 Interstate 80 in Utah between mile markers 1 and 80.
 Utah Route 30 between mile markers 1 and 4.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 4141 11404 4108 11255 4040 11259 4067 11404
TIME...MOT...LOC 0225Z 209DEG 54KT 4077 11405 4046 11265

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

ND