Flash Flood Warning 6, NWS Salt Lake City, UT

987 
WGUS75 KSLC 231846
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
1246 PM MDT Thu Jul 23 2020

UTC017-055-232145-
/O.CON.KSLC.FF.W.0006.000000T0000Z-200723T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Garfield UT-Wayne UT-
1246 PM MDT Thu Jul 23 2020

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM MDT THIS 
AFTERNOON FOR NORTH CENTRAL GARFIELD AND SOUTHWESTERN WAYNE 
COUNTIES...

At 1246 PM MDT, Doppler radar and automated rain gauges indicated 
thunderstorms producing heavy rain across the warned area. Between 
0.5 and 1 inch of rain has fallen. Flash flooding is ongoing or 
expected to begin shortly.

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

SOURCE...Doppler radar and automated gauges.

IMPACT...Life threatening flash flooding of dry washes, slot
         canyons, streams, highways and dirt roads.

Some locations that will experience flash flooding include...
  Capitol Reef National Park, Torrey, Teasdale and Fruita.  This 
  warning includes the Scenic Drive, Sulphur Creek, Grand Wash, and 
  Capitol Gorge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3833 11155 3839 11139 3842 11132 3818 11106
      3813 11139

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

$$

CRK

245 
WGUS75 KSLC 232046
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
246 PM MDT Thu Jul 23 2020

UTC017-055-232145-
/O.CON.KSLC.FF.W.0006.000000T0000Z-200723T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Garfield UT-Wayne UT-
246 PM MDT Thu Jul 23 2020

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM MDT THIS 
AFTERNOON FOR NORTH CENTRAL GARFIELD AND SOUTHWESTERN WAYNE 
COUNTIES...

At 246 PM MDT, Capitol Reef National Park and UDOT flash flooding in 
Sulpher Creek and along SR-24, which has been closed. Between 0.75 
and 1 inch of rain has fallen. Flash flooding is ongoing.

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

SOURCE...National Park Service and Department of Transportation.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets and underpasses.

Some locations that will experience flash flooding include...
  Capitol Reef National Park, Torrey, Teasdale and Fruita.

This includes the following highways...
	Utah Route 12 between mile markers 110 and 122.
	Utah Route 24 between mile markers 62 and 85.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3833 11155 3839 11139 3842 11132 3818 11106
      3813 11139

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

Church

585 
WGUS75 KSLC 232138
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
338 PM MDT Thu Jul 23 2020

UTC017-055-232148-
/O.EXP.KSLC.FF.W.0006.000000T0000Z-200723T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Garfield UT-Wayne UT-
338 PM MDT Thu Jul 23 2020

...FLASH FLOOD WARNING WILL EXPIRE AT 345 PM MDT THIS AFTERNOON FOR 
NORTH CENTRAL GARFIELD AND SOUTHWESTERN WAYNE COUNTIES...

Additional heavy rainfall will be possible through the evening. 
Monitor NOAA weather radio or your favorite media outlet for 
potential additional warnings.

LAT...LON 3833 11155 3839 11139 3842 11132 3818 11106
      3813 11139

$$

CRK

Area Forecast Discussion
National Weather Service Salt Lake City UT
1025 AM MDT Thu Jul 23 2020

.SYNOPSIS...Monsoonal moisture will impact the eastern two-thirds
of Utah through Friday. A gradual drying trend is anticipated for
this weekend.

&&

.SHORT TERM (Through 12Z Sunday)...The axis of the moisture plume
currently extends from south-central through northeast Utah. The
upper trough currently over California will weaken as it ejects
northeast across the northern and western Great Basin tonight
through Friday.

Drier air ahead of the advancing upper trough will gradually
expand east into far western Utah today/tonight. This contrast
between the moist air mass to the east and drier air to the west
will provide a boundary to focus convection this afternoon through
early this evening. Anticipating that some dynamic support for
enhanced lift will materialize this afternoon as subtle vorticity
maxima lift north through the state with increasing jet level
support induced from the increasing moisture contrast this
afternoon and evening.

Thunderstorms that develop will be capable of producing locally
heavy rain late this afternoon/early evening. A few strong storms
could develop across the far south as effective bulk shear
increases near the Arizona border late this afternoon/early this
evening.

Northwest Utah could see limited convective activity developing by
late this afternoon. A weak shortwave lifting northeast out of
Nevada will bring in cooler air aloft and create a short period of
a sufficiently unstable air mass and dynamic lift to support
convection this evening. Anticipating that this will be a short-
lived event with gusty winds the main impact from the convection.

Further expansion of the drier air across Utah will confined the
monsoonal moisture to far eastern Utah Friday. Looking at limited
convection across far western/northern Utah as the aforementioned
shortwave moves through Friday late morning through the afternoon.
Southeast through east-central will also remain somewhat active
within the residual moisture plume over the area. Moisture will
work back into southern Utah, bringing afternoon/evening
convection back into the area over the weekend.

.LONG TERM (After 12Z Sunday)...Global models in good agreement in
indicating building ridge over eastern Great Basin on Sunday, with
deeper moisture restricted to southeastern third of forecast area,
where have maintained slight chance for showers and thunderstorms.

GFS and ECMWF deterministic solutions diverge from Sunday into
Monday with GFS ridge axis progged a bit further east, and thus,
offering a southerly moist flow, while ECMWF suggests a drier
southwest flow. Ensemble means appear in general agreement and seem
to suggest deeper moisture primarily over eastern half of forecast
area.

Global models diverge further from Wednesday into Thursday, with
GEFS and CMCE means indicating ridge axis over Rockies, and thus, a
somewhat moist mid level flow of moisture, with precipitable water
values in excess of an inch.  EPS mean continues to indicate a more
elongated ridge, displaced further south and west, and thus,
indicates a much drier west to southwest flow.  Given uncertainty,
will go with slight chance wording for generally southeastern half
of forecast area from late Wednesday into Thursday as a start.

Temperatures will trend warmer through the period, with readings
expected to be a bit above above normal during the period.

&&

.AVIATION...VFR conditions will prevail at KSLC through the valid
TAF period. Isolated thunderstorms will form after 19z, with these
storms generally to the south and east of the terminal through
early this evening. A second area of thunderstorms will over
northwest Utah for this evening. Any thunderstorms will be
capable of producing erratic and gusty winds at the terminal
through 04z.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...Red Flag Warning until 9 PM MDT this evening for UTZ492-495.

WY...None.
&&

SHORT TERM...CONGER
LONG TERM...BARJENBRUCH
AVIATION...KRUSE

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
533 AM MDT Thu Jul 23 2020

UTZ001>016-019>021-517-518-WYZ021-241145-
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-
533 AM MDT Thu Jul 23 2020

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

.DAY ONE...Today and Tonight

A moist and unstable airmass will remain over all but far western
Utah today. Showers and thunderstorms will develop by this
afternoon. Any storms that develop will be capable of producing
heavy rain, so isolated flash flooding as possible, particularly
for prone areas such as slot canyons, burn scars, and normally dry
washes.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Drier air will move over the area Friday through the weekend.
Showers and thunderstorms will develop once again over eastern
Utah Friday, and flash flooding will remain a threat. As the
airmass continues to dry over the weekend and into early next
week, the threat of flash flooding will diminish.

.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
1056 AM MDT Thu Jul 23 2020

UTZ014-517-231745-
Sanpete/Sevier Valleys UT-Central and Southwest Mountains UT-
1056 AM MDT Thu Jul 23 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL SANPETE...WESTERN
EMERY AND NORTHEASTERN SEVIER COUNTIES UNTIL 1145 AM MDT...

At 1055 AM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm 11 miles south of Salina, or 13 miles east of
Richfield...moving northeast at 30 mph.

Penny to nickel size hail and winds in excess of 40 mph will be
possible.

This storm will remain over mainly rural areas of south central
Sanpete...western Emery and northeastern Sevier Counties.

This includes the following highways...
 Interstate 70 between mile markers 61 and 79.
 Utah Route 24 between mile markers 18 and 26.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3863 11180 3874 11196 3876 11195 3875 11192
      3883 11189 3891 11180 3895 11179 3920 11150
      3900 11127
TIME...MOT...LOC 1655Z 229DEG 24KT 3878 11183

CRK

Special Weather Statement
National Weather Service Salt Lake City UT
1207 PM MDT Thu Jul 23 2020

UTZ013-518-231845-
Southern Utah Mountains UT-San Rafael Swell UT-
1207 PM MDT Thu Jul 23 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL GARFIELD AND
SOUTHWESTERN WAYNE COUNTIES UNTIL 1245 PM MDT...

At 1207 PM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm 9 miles south of Torrey, or 11 miles southwest of
Capitol Reef National Park...moving east at 25 mph.

Penny to nickel size hail and winds in excess of 40 mph will be
possible.

Locations impacted include...
Capitol Reef National Park, Fruita and Caineville.

This includes the following highways...
 Utah Route 12 between mile markers 104 and 120.
 Utah Route 24 between mile markers 78 and 102.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3806 11140 3823 11148 3843 11098 3817 11086
TIME...MOT...LOC 1807Z 249DEG 21KT 3818 11136

CRK

Special Weather Statement
National Weather Service Salt Lake City UT
1225 PM MDT Thu Jul 23 2020

UTZ518-231915-
Southern Utah Mountains UT-
1225 PM MDT Thu Jul 23 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN PIUTE...NORTHWESTERN
GARFIELD...SOUTHEASTERN BEAVER AND EASTERN IRON COUNTIES UNTIL 115 PM
MDT...

At 1225 PM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm 13 miles north of Panguitch, or 18 miles
southwest of Junction...moving north at 30 mph.

Penny size hail and winds in excess of 40 mph will be possible.

Locations impacted include...
Junction, Circleville and Kingston.

This includes US Route 89 between mile markers 138 and 165.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3787 11232 3795 11253 3831 11244 3822 11211
TIME...MOT...LOC 1825Z 202DEG 24KT 3801 11241

Webber

Special Weather Statement
National Weather Service Salt Lake City UT
1226 PM MDT Thu Jul 23 2020

UTZ012-013-517-231915-
San Rafael Swell UT-Central and Southwest Mountains UT-
Castle Country UT-
1226 PM MDT Thu Jul 23 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN EMERY AND EAST
CENTRAL SEVIER COUNTIES UNTIL 115 PM MDT...

At 1226 PM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm 23 miles east of Salina, or 32 miles south of
Manti...moving northeast at 5 mph.

Penny to nickel size hail and wind gusts of 40 to 55 mph will be
possible.

Locations impacted include...
Fremont Junction.

This includes the following highways...
 Interstate 70 between mile markers 75 and 101.
 Utah Route 10 between mile markers 0 and 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3867 11149 3885 11158 3901 11135 3873 11109
TIME...MOT...LOC 1826Z 238DEG 5KT 3882 11145

CRK