Severe Thunderstorm Warning 13, NWS Salt Lake City, UT

628 
WWUS55 KSLC 261746
SVSSLC

Severe Weather Statement
National Weather Service Salt Lake City UT
1146 AM MDT Fri May 26 2023

WYC041-261800-
/O.CON.KSLC.SV.W.0013.000000T0000Z-230526T1800Z/
Uinta WY-
1146 AM MDT Fri May 26 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL NOON MDT FOR
SOUTHEASTERN UINTA COUNTY...

At 1145 AM MDT, a severe thunderstorm was located over Mountain View,
or 28 miles southwest of Granger, moving northeast at 15 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees. 

Locations impacted include...
Lyman, Mountain View, Robertson, Millburne and Fort Bridger. 

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 4111 11033 4124 11047 4140 11036 4119 11013
TIME...MOT...LOC 1745Z 229DEG 14KT 4126 11029 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

ND

Area Forecast Discussion
National Weather Service Salt Lake City UT
409 AM MDT Fri May 26 2023

.SYNOPSIS...Unsettled conditions will continue across northern
Utah into next week, with drier conditions building into southern
Utah Saturday into early next week.

&&

.SHORT TERM (Through 12Z Sunday)...Expect the Memorial Day Weekend
to start off with showers and thunderstorms this afternoon and
evening across northern and central Utah...with another round
expected Saturday afternoon and evening. Make sure any plans
consider the lightning threat...and if you hear thunder...you can
be struck by lightning. Seek adequate shelter immediately!

Morning satellite and upper air analysis indicates a (very) slow
moving longwave trough is currently progressing eastward across
the western Great Basin. Showers with occasional embedded
thunderstorms continue to cross much of the state.

00Z HREF ensemble mean SBCAPE is forecast to range from 250-1000
J/kg across northern Utah and interior central and southwestern
Utah. Deep layer shear is expected to be a bit less than the past
few days, around 10-25kts. Current CAMS suggest convection will be
most focused from roughly Evanston southwest to near Cedar Breaks
National Monument this afternoon and evening. Think the best
potential for strong, gusty microburst winds and perhaps small
hail will be across northern Utah, particularly east of the
Wasatch Front into Uinta County, WY.

The trough will be nearly overhead by Saturday afternoon, with
another round of convection focused on northern Utah, with drier
conditions building into southern Utah. HREF ensemble mean SBCAPE
and deep layer shear are less significant Saturday afternoon and
evening, but given the drier air moving into the state...can't
rule out microbursts as a threat once again.

.LONG TERM (After 12Z Sunday)...An unsettled pattern is expected
to continue for the long term period. A couple of shortwaves will
move through the area and give us chances at precipitation each
day, especially in central and northern Utah and southwest
Wyoming. These showers and thunderstorms will form with dry
subcloud layers so gusty and erratic outflow winds will be
possible. Temperatures will be near normal to about 7 degrees
above normal. This means high temperatures for most locations will
be in the low 70s to mid 80s and lower Washington County will
have highs in the low 90s.

Beginning on Sunday, the first shortwave exits the area while a
second shortwave moves down the Pacific coast. Scattered showers
and thunderstorms will remain possible due to PWATs between 0.4
inches and 0.8 inches and diurnal heating, along with the
consistent south to southwesterly flow. Central and northern Utah
and southwest Wyoming will be the areas that will see these
storms. Southern Utah remains limited in the amount of moisture it
has.

Heading into Monday and Tuesday, guidance begins to diverge as to
what will happen with the shortwave. Guidance does agree on the
shortwave strengthening but deterministic models have the
shortwave closing off, while ensemble guidance does not share this
same solution. While this shortwave strengthens, precipitation
chances across the CWA for both Monday and Tuesday will be less
than Sunday as the disturbance is further west, but still be
across the same areas.

For the rest of the long term period, guidance still differs on
if a closed low forms from the shortwave, but is consistent in
having the disturbance move eastward. South to southwest flow is
expected to continue as the shortwave/closed low moves eastward.
This would increase precipitation chances across central and
northern Utah and southwest Wyoming. Southern Utah would likely
remain dry as there is not as much available moisture as other
parts of the CWA.

&&

.AVIATION...KSLC...Predominant wind direction overnight will
continue to be light southeasterly winds. Winds are expected to
shift to the northwest between 17Z and 19Z. Scattered shower and
thunderstorm activity to begin by 19Z and last until ~02Z. If a
storm moves over or near the area, gusty and erratic outflow winds
will be possible, as well as heavy rain and frequent lightning.
Predominant light southeasterly winds expected to return by 03Z.

.REST OF UTAH AND SOUTHWEST WYOMING...Light and variable winds
expected to continue overnight and through the day Friday for
northern Utah and southwest Wyoming. Southern Utah will switch to
southwesterly winds in the late morning. Scattered showers and
thunderstorms will be possible between 18Z and 04Z across central
and northern Utah and southwest Wyoming. These storms could
produce gusty and erratic outflow winds, heavy rain, and frequent
lightning.

&&

.FIRE WEATHER...A slow moving disturbance will cross the Great
Basin through the weekend bringing unsettled conditions mainly to
the northern half of the state. Another disturbance will develop
off the Pacific Coast early next week, keeping unsettled
conditions north, drier conditions south through at least midweek
next week.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...Flood Watch through Thursday afternoon for UTZ107.

WY...None.
&&

Kruse/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
1028 AM MDT Fri May 26 2023

UTZ112-WYZ021-261715-
Western Uinta Mountains UT-Southwest Wyoming WY-
1028 AM MDT Fri May 26 2023

...Strong thunderstorms will impact portions of north central
Duchesne...east central Summit and southern Uinta Counties through
1115 AM MDT...

At 1027 AM MDT, Doppler radar was tracking a series of strong
thunderstorms 21 miles northeast of Mirror Lake, or 36 miles
southeast of Evanston, moving north at 30 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.

Locations impacted include...
Robertson, Mountain View, Ragen, Millburne, Fort Bridger, Altamont,
Piedmont, Kings Peak and Leroy.

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.

Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.

&&

LAT...LON 4072 11039 4081 11064 4101 11063 4111 11089
      4134 11084 4143 11041 4108 11018
TIME...MOT...LOC 1627Z 196DEG 24KT 4084 11053

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

ND