Flash Flood Warning 14, NWS Salt Lake City, UT

954 
WGUS75 KSLC 140052
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
652 PM MDT FRI JUL 13 2018

UTC021-140215-
/O.CON.KSLC.FF.W.0014.000000T0000Z-180714T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Iron UT-
652 PM MDT FRI JUL 13 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM MDT FOR
SOUTHEASTERN IRON COUNTY...

At 647 PM MDT, Doppler radar indicated that around 1 inch of rain 
has fallen over the Parowan Creek portion of the Brian Head burn 
scar. Flash flooding is already occurring on the Parowan Creek 
drainage and has produced a debris flow across Highway 143. The 
threat of debris flows will continue to be a threat through the early 
evening. People in this area should take action to ensure their 
safety!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If a debris flow has occurred it is important to realize that the
runout area remains very dangerous. Additional debris flows may occur
within minutes of the original flow. Please remain vigilant and be
prepared to take swift action.

&&

LAT...LON 3783 11281 3781 11280 3771 11281 3771 11286
      3776 11286 3780 11283

$$

LC

162 
WGUS75 KSLC 140209
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
809 PM MDT FRI JUL 13 2018

UTC021-140216-
/O.EXP.KSLC.FF.W.0014.000000T0000Z-180714T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Iron UT-
809 PM MDT FRI JUL 13 2018

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN IRON COUNTY WILL EXPIRE
AT 815 PM MDT...

The heavy rain has ended over the Brian Head burn scar, although 
periods of light rain may persist through the evening. The threat of 
additional debris flows has diminished. Please continue to heed any 
remaining road closures.

LAT...LON 3783 11281 3781 11280 3771 11281 3771 11286
      3776 11286 3780 11283

$$

LC

Area Forecast Discussion
National Weather Service Salt Lake City UT
332 PM MDT Fri Jul 13 2018

.SYNOPSIS...High pressure remains in place across the Great
Basin with a dry air mass over northern Utah through the weekend.
Moisture will linger over central and southern Utah through
Saturday, with some drying taking place on Sunday.

&&

.SHORT TERM (Through 06Z Tuesday)...Another typical July day
across the CWA, with an ongoing monsoonal surge across southern
Utah. As has been the case the last several days, sufficient
instability has developed...however deep layer shear remains
minimal. Convection has developed along the higher terrain of
central and southern Utah. A significant outflow boundary is noted
progressing south-southwestward near and west of Bryce Canyon.
This outflow boundary will be moving into the axis of instability
across southwestern Utah. Deeper convection has already been
noted as this outflow boundary has progressed southward over the
last hour or so. Expect thunderstorms to congeal into a common
cold pool and continue to move south to southwestward into the
evening. This evolution is supported by CAM guidance as well.

The upper level ridge has strengthened over the last 24 hours and
this may providing an increase in subsidence and a net drying
trend. That said, areas prone to flash flooding such as slot
canyons, dry washes, slick rock and burn scars may experience
flash flooding this afternoon and evening. This includes Zion
National Park...and those who may have plans in the park should
pay attention to the weather this afternoon and evening.
Remember...even if the thunderstorm isn't overhead, flash flooding
can still impact downstream locations.

A subtle shortwave rotating around the center of the ridge will
help to shunt moisture north and east through Saturday afternoon
and evening. This should shift the thunderstorm threat further
north and east, though the biggest threat for flooding will be
confined to burn scars for central and northern Utah.

In the wake of this shortwave and the shifting of the mean ridge
position...drier and hotter conditions will build into the area
for Sunday and Monday.

.LONG TERM (After 06Z Tuesday)...High pressure is expected to build
over Nevada Tuesday before the axis shifts over Utah for Wednesday
and Thursday. This will allow for a quick drying trend for all but
far southern Utah and should bring very warm temperatures for the
middle of the week. In the drier and more stable airmass there
should be a relative lull in convection, but some should still be
possible over the higher terrain as well as parts of southern Utah.

EC/GFS indicate the ridge axis will shift east of the forecast area
late Thursday into Friday, allowing a more southerly flow to develop
over Utah and southwest Wyoming, drawing moisture back into the area
and increasing coverage of convection through day seven.

&&

.AVIATION...Northerly winds will prevail at the SLC terminal through
about 03-04Z then shift to the southeast. No weather concerns
through the TAF period.

&&

.FIRE WEATHER...Deep moisture remains in place across southern Utah
this afternoon. Another round of showers and thunderstorms with
wetting rains will continue into late evening...particularly
across southwestern Utah. A weak disturbance rotating around the
high will temporarily bring moisture and associated thunderstorms
north and east Saturday. By Sunday, much of the district will be
drier...and this trend toward hot and dry conditions will continue
into next week.

&&

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

Kruse/Traphagan/Struthwolf

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
659 AM MDT Fri Jul 13 2018

UTZ001>016-019>021-517-518-WYZ021-141200-
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-
659 AM MDT Fri Jul 13 2018

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

.DAY ONE...Today and Tonight

With a rather moist air mass in place, showers and thunderstorms
will be scattered over central and southern Utah, primarily this
afternoon and evening. The primary concern is the potential for
heavy rain over southern Utah, with flash flooding a possibility.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

There will be a potential for showers and thunderstorms,
primarily over southern Utah and the higher terrain of central
Utah, through the period.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

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