Flash Flood Warning 7, NWS Salt Lake City, UT

193 
WGUS75 KSLC 270014
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
614 PM MDT Fri Jul 26 2019

UTC049-270115-
/O.CON.KSLC.FF.W.0007.000000T0000Z-190727T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Utah UT-
614 PM MDT Fri Jul 26 2019

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM MDT FOR
SOUTH CENTRAL UTAH COUNTY...

At 609 PM MDT, flash flooding continues on the back side of the Pole 
Creek burn scar in southern Utah county. The Utah Department of 
Transportation reported a debris flow that closed US-89 in both 
directions near milepost 307, just north of Birdseye. Additionally, 
Utah County Emergency Management Reports that some vehicles were 
swept off the road due to the debris flow and several more remain 
stranded on the road. 

National Weather Service radar estimates that an inch to an inch and 
a half of rain fell in approximately 45 minutes across a broad area 
in the vicinity of Birdseye. Continue to avoid this area for the 
duration of the warning, as it will take time for flood waters to 
recede. 

Some locations that will experience flooding include...
Birdseye.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3983 11162 3996 11171 4008 11144 3991 11136

$$

MT

876 
WGUS75 KSLC 270110
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
710 PM MDT Fri Jul 26 2019

UTC049-270119-
/O.EXP.KSLC.FF.W.0007.000000T0000Z-190727T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Utah UT-
710 PM MDT Fri Jul 26 2019

...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL UTAH COUNTY WILL EXPIRE
AT 715 PM MDT...

Though the heavy rain has ended, US-89 near Birdseye remains closed 
due to the debris flow. Continue to avoid this area.

LAT...LON 3983 11162 3996 11171 4008 11144 3991 11136

$$

MT

Area Forecast Discussion
National Weather Service Salt Lake City UT
319 PM MDT Fri Jul 26 2019

.SYNOPSIS...Shower and thunderstorm activity will increase across
Utah this afternoon and evening as a weather disturbance lifts
slowly east northeast through the region. Drier air will follow
this weather disturbance and produce dry and seasonally warm
conditions through early next week.

&&

.SHORT TERM (Through 00z Tuesday)...A return flow short wave
that is currently tracking across southwestern Utah will continue
to lift to the northeast through this evening. Added forcing from
weak dynamic lift from this provided a spark for numerous showers
and thunderstorms across southern Utah over the last several
hours, and these will areally expand north and east coincident
with the wave translation moving forward. The environment from
roughly KSLC and points south remains primed with deep moisture
(PWAT roughly 90th percentile for the day) and increasing
instability (near 1500 J/KG) for maintenance of these storms into
this evening, with locally heavy rainfall potential remaining a
threat...including recent burn scars in central/northern Utah
susceptible to debris flows. A flash flood watch remains in place
through this evening regarding this threat.

Flow will veer west-northwest tonight into Saturday allowing a
drier flow aloft to impinge on the area for the weekend. This
drying trend will be slow to occur across the mountain spines and
east as initial drying should be aloft with mid/low level
residual moisture remaining plentiful. Can not rule out locally
heavy rain associated convection in the afternoon for those areas.
This said, trends will be to dry west to east for the latter half
of the weekend as the high bulges northwest into Idaho allowing a
stable/dry northwesterly flow aloft to dominate for Sunday. The
ridge will begin to shift back towards the 4-corner region Monday
once again setting up better trajectories for mid level moisture
advection back into the area, but more so in the long term. In
large for Monday, dry and hot with temps several degrees above
seasonal norms.

.LONG TERM (After 00Z Tuesday)...Midlevel ridge nudges slightly
eastward, ushering in another monsoonal surge with increasing chance
of convective showers and thunderstorms over the higher terrain.
Afternoon max temps should hover around or even slightly below norms
for much of the work week. A weak shortwave moving through the
northern CWA after midweek may promote more widespread precip.
Lingering moisture after the wave will maintain a threat of showers
and thunderstorms across the region through the end of the forecast
period.

&&

.AVIATION...Northerly winds are expected to switch to the southeast
around 03Z. VFR conditions will prevail through the day with a 40
percent chance of showers/thunderstorms impacting the terminal
during the 22-03Z timeframe. Winds may become gusty and erratic
during showery periods. Cigs will likely remain around 10kft AGL
with possible dips to 8k during showers.

&&

.FIRE WEATHER...Deep moisture has returned to the north today,
and coupled with a wave moving SW-NE across the district this
afternoon/evening, will allow for elevated wetting rain potential
across most all of the district through this evening. A drier
westerly flow will develop Saturday gradually drying the
district from west to east during the day, but enough residual
moisture will remain in place across the mountains and east for
another round of scattered showers/storms during the peak
heating hours. Come Sunday much drier conditions will exist,
and as the high pressure builds west of the area into next week,
warming trend temps will once again occur.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...Flash Flood Watch until 10 PM MDT this evening for UTZ004-008-
     010-517.

WY...None.
&&

Merrill/Verzella

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
614 AM MDT Fri Jul 26 2019

UTZ001>016-019>021-517-518-WYZ021-271200-
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-
614 AM MDT Fri Jul 26 2019

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

.DAY ONE...Today and Tonight

Scattered showers and thunderstorms will develop once again
across much of the outlook area today. These showers and storms
will have the potential for brief, but heavy rain, which could
result in flash flooding and debris flows near any of the burn
scars in central and southern Utah. This shower and thunderstorm
activity will peak during the afternoon and early evening hours,
then decrease to scattered light showers across mainly northern
Utah and southwest Wyoming late tonight.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Scattered showers and isolated thunderstorms will linger across
the northern portion of the outlook area through Saturday
afternoon. Significantly drier air will spread across the outlook
from the west beginning late Saturday. This drier air will bring
an end to showers and thunderstorms by Sunday, with these dry
conditions extending into the first half of the next week.
Temperatures will climb back above late July norms early in the
week.

.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

Special Weather Statement
National Weather Service Salt Lake City UT
1206 PM MDT Fri Jul 26 2019

UTZ518-261900-
Southern Utah Mountains UT-
1206 PM MDT Fri Jul 26 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN GARFIELD AND EAST
CENTRAL IRON COUNTIES UNTIL 100 PM MDT...

At 1206 PM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm near Panguitch, or 26 miles south of Junction...
moving northeast at 5 mph.

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

Locations impacted include...
Panguitch.

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 3776 11237 3775 11252 3797 11264 3812 11226
      3786 11209
TIME...MOT...LOC 1806Z 239DEG 5KT 3788 11237

Bonnette