Severe Thunderstorm Warning 4, NWS Salt Lake City, UT

646 
WWUS55 KSLC 302145 RRA
SVSSLC

Severe Weather Statement
National Weather Service Salt Lake City UT
345 PM MDT Sat May 30 2020

UTC027-302200-
/O.CON.KSLC.SV.W.0004.000000T0000Z-200530T2200Z/
Millard UT-
345 PM MDT Sat May 30 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM MDT
FOR EAST CENTRAL MILLARD COUNTY...

At 345 PM MDT, a severe thunderstorm was located 8 miles north of
Fillmore, moving north at 30 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Fillmore, Scipio, Holden, Flowell, Greenwood and Mc Cornick. 

This includes the following highways...
 Interstate 15 between mile markers 162 and 190.
 US Route 50 between mile markers 99 and 135.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3890 11220 3894 11243 3928 11246 3927 11204
TIME...MOT...LOC 2145Z 192DEG 26KT 3908 11228 

HAIL...<.75IN
WIND...60MPH
 
$$

MPS

083 
WWUS55 KSLC 302159
SVSSLC

Severe Weather Statement
National Weather Service Salt Lake City UT
359 PM MDT Sat May 30 2020

UTC027-302209-
/O.EXP.KSLC.SV.W.0004.000000T0000Z-200530T2200Z/
Millard UT-
359 PM MDT Sat May 30 2020

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MILLARD COUNTY
WILL EXPIRE AT 400 PM MDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

LAT...LON 3890 11220 3894 11243 3928 11246 3927 11204
TIME...MOT...LOC 2159Z 192DEG 26KT 3917 11226 

$$

MPS

Area Forecast Discussion
National Weather Service Salt Lake City UT
1005 AM MDT Sat May 30 2020

.SYNOPSIS...The warm southerly flow over Utah will strengthen
as a storm system ejects northeast across the western Great
Basin today. Moisture in place across the eastern two thirds of
the state will fuel showers and thunderstorms again this afternoon
and evening. Drier conditions and still unseasonably warm
conditions will remain across the area to begin the upcoming week.

&&

.DISCUSSION...The high amplitude ridge to the immediate east of
Utah and an upstream upper low moving north-northeast through
central/northern California will produce an increasingly strong
and quite warm southerly flow across the Great Basin today.
Expecting strong/gusty southerly winds across western/southern
Utah as a surface trough moves into eastern Nevada and good
vertical mixing ahead of this trough brings the increasingly
strong low-level winds aloft into play this afternoon. Critical
fire weather conditions are expected across the lower elevations
of west-central through extreme southern Utah due to the strong
winds and low humidity.

The moisture plume focused on the eastern two-thirds of Utah
continues to fuel scattered light showers and/or virga this
morning. Anticipating some breaks in cloud cover later this
morning through early afternoon which will promote strong surface
heating and destabilize the air mass by later this afternoon
through early this evening. Scattered convection developing by
late this afternoon could gain some organization from any subtle
dynamic features embedded in this moisture plume

The best area for convection by this evening could focus along the
boundary between the drier air advancing east into western Utah
and the moisture plume already in place across the eastern two-
thirds of the state. Areas along the I-15 corridor and points east
could see the greatest concentration of showers and storms this
evening. This convection initially could produce strong/gusty
winds followed by a few of the stronger storms capable of brief
moderate to heavy rainfall.

The lifting of the aforementioned California upper low north-
northeast through the western Great Basin could bring convection
into far northwest Utah late tonight. At this time it appears that
convection will be somewhat limited in areal coverage, and
confined to the surface trough over extreme northwest Utah.

The eastward spread of drier air across the state Sunday will
limit any convection to mainly eastern third of the state Sunday
and into early next week. Moisture could return to the area
towards the middle and latter portions of the upcoming week.

.AVIATION...Southerly winds are expected to prevail at the KSLC
terminal through the valid TAF period, with increasingly gusty
conditions developing this afternoon. Within the 21-02z window,
showers and thunderstorms in the vicinity of the terminal will
likely create gusty and erratic outflow winds periodically into
early evening, with a 20 percent chance of thunderstorms directly
impacting the terminal.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...Red Flag Warning until 8 PM MDT Sunday for UTZ490-495-497-498.

     Wind Advisory until 9 PM MDT this evening for UTZ005-015-016.

     Fire Weather Watch from Sunday afternoon through Sunday evening
     for UTZ489.

WY...None.
&&

PUBLIC...CONGER
AVIATION...MERRILL

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

For frequently asked questions about the Area Forecast Discussion
visit...
http://weather.gov/saltlakecity/general/afd_faqs.php

Hazardous Weather Outlook
National Weather Service Salt Lake City UT
540 AM MDT Sat May 30 2020

UTZ001>016-019>021-517-518-WYZ021-311300-
Cache Valley/Utah Portion-Northern Wasatch Front-
Salt Lake and Tooele Valleys-Southern Wasatch Front-
Great Salt Lake Desert and Mountains-Wasatch Mountain Valleys-
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Western Uinta Mountains-Wasatch Plateau/Book Cliffs-
Western Uinta Basin-Castle Country-San Rafael Swell-
Sanpete/Sevier Valleys-West Central Utah-Southwest Utah-
Utahs Dixie and Zion National Park-South Central Utah-
Glen Canyon Recreation Area/Lake Powell-Central Mountains-
Southern Mountains-Southwest Wyoming-
540 AM MDT Sat May 30 2020

This Hazardous Weather Outlook is for the western two thirds of
Utah and southwest Wyoming.

.DAY ONE...Today and Tonight

Southwesterly winds will increase today, with gusts 40 to 50 mph
expected this afternoon and evening across much of western Utah.

Strong winds will also support critical fire weather conditions
today, especially when combined with low humidities and dry fuels
across portions of southern and central Utah.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Critical fire weather conditions will continue Sunday and
potentially into Monday for portions of central and southern Utah
due to gusty winds, low humidities, and dry fuels.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any information
about observed severe weather to the NWS while following all
local, state, and CDC guidelines.

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

For information on potential road travel impacts visit...
http://www.udottraffic.utah.gov/roadweatherforecast.aspx

Special Weather Statement
National Weather Service Salt Lake City UT
253 PM MDT Sat May 30 2020

UTZ016-518-302130-
Southern Utah Mountains UT-Southwest Utah UT-
253 PM MDT Sat May 30 2020

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL IRON COUNTY UNTIL 330 PM
MDT...

At 253 PM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm over Cedar City...moving north at 35 mph.

Half inch hail and winds in excess of 40 mph will be possible.

Locations impacted include...
Cedar City, Enoch, Summit and Hamilton Fort.

This includes the following highways...
 Interstate 15 between mile markers 53 and 68.
 Utah Route 56 between mile markers 54 and 61.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If threatening weather approaches, take shelter in a sturdy building.

This storm is capable of producing a significant amount of hail.
Hail may accumulate on area roads including I-15 resulting in
dangerous travel conditions.

&&

LAT...LON 3763 11302 3762 11318 3788 11326 3789 11294
TIME...MOT...LOC 2053Z 178DEG 32KT 3771 11309

MPS

Special Weather Statement
National Weather Service Salt Lake City UT
317 PM MDT Sat May 30 2020

UTZ002-003-007-302200-
Wasatch Mountains I-80 North UT-Northern Wasatch Front UT-
Salt Lake and Tooele Valleys UT-
317 PM MDT Sat May 30 2020

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN WEBER...SOUTHEASTERN BOX
ELDER...NORTH CENTRAL SALT LAKE...DAVIS AND NORTHWESTERN MORGAN
COUNTIES UNTIL 400 PM MDT...

At 317 PM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm over Clearfield, or over Layton...moving north at
30 mph.

Wind gusts up to 50 mph will be possible.

Locations impacted include...
Ogden, Layton, Bountiful, Farmington, Hill Air Force Base, Roy,
Clearfield, Kaysville, Syracuse, Clinton, North Ogden, South Ogden,
Centerville, Washington Terrace, Riverdale, Hooper, South Weber, West
Bountiful, Perry and Willard.

This includes the following highways...
 Interstate 15 between mile markers 318 and 360.
 Interstate 84 between mile markers 82 and 90.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If threatening weather approaches, take shelter in a sturdy building.

If on or near the Great Salt Lake, get out of the water and move
indoors or inside a vehicle. Remember, lightning can strike out to
10 miles from the parent thunderstorm. If you can hear thunder, you
are close enough to be struck by lightning. Move to safe shelter
now! Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4090 11185 4086 11209 4105 11238 4146 11239
      4146 11196 4122 11188
TIME...MOT...LOC 2117Z 193DEG 26KT 4109 11200

MPS

Special Weather Statement
National Weather Service Salt Lake City UT
320 PM MDT Sat May 30 2020

UTZ020-518-302145-
Southern Utah Mountains UT-South Central Utah UT-
320 PM MDT Sat May 30 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN GARFIELD AND NORTH
CENTRAL KANE COUNTIES UNTIL 345 PM MDT...

At 320 PM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm 12 miles south of Bryce Canyon National Park, or
35 miles northeast of Kanab...moving north at 30 mph.

Penny size hail and wind gusts up to 50 mph will be possible.

Locations impacted include...
Red Canyon, Bryce Canyon National Park, Tropic, Hillsdale and Rubys
Inn.

This includes the following highways...
 US Route 89 between mile markers 119 and 125.
 Utah Route 12 between mile markers 0 and 20.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If threatening weather approaches, take shelter in a sturdy 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.

&&

LAT...LON 3741 11215 3741 11236 3776 11243 3777 11204
TIME...MOT...LOC 2120Z 178DEG 26KT 3750 11226

MPS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
334 PM MDT SAT MAY 30 2020

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

0325 PM     TSTM WND GST     HILL AFB                41.12N 111.97W
05/30/2020  M68 MPH          DAVIS              UT   AWOS

            AWOS STATION KHIF HILL AFB OGDEN.

0235 PM     TSTM WND GST     6 NE LAKE PT            40.73N 112.20W
05/30/2020  M60 MPH          SALT LAKE          UT   MESONET

            MESONET STATION KCC02 5.6 NE LAKE PT
            (KENNECOTT).

0320 PM     TSTM WND GST     3 S AMERICAN FORK       40.34N 111.80W
05/30/2020  M59 MPH          UTAH               UT   MESONET

            MESONET STATION AMFKM 3.1 S AMERICAN FORK
            (UUNET).

0310 PM     TSTM WND GST     4 WSW LEHI              40.37N 111.92W
05/30/2020  M59 MPH          UTAH               UT   MESONET

            MESONET STATION UTPCR 3.8 SW LEHI (UTAH
            DOT).

&&