Flash Flood Warning 32, NWS Salt Lake City, UT

329 
WGUS75 KSLC 180102
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
702 PM MDT TUE JUL 17 2018

UTC025-180245-
/O.CON.KSLC.FF.W.0032.000000T0000Z-180718T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kane UT-
702 PM MDT TUE JUL 17 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM MDT FOR
CENTRAL KANE COUNTY...

At 658 PM MDT, Intense rainfall continues to fall over the lower 
Paria Drainage including Buckskin Wash and other nearby drainages. 
Radar rainfall estimates indicate that over two inches of rain has 
fallen over these very flash flood prone areas.

If you are around the lower Paria and associated tributaries, please 
be aware of dangerous flash flooding and swift moving water.  This 
is quite the hazardous situation in this area and any of these 
places should be avoided.

Some locations that will experience flooding include...
Big Water and Lake Powell. 

LAT...LON 3750 11160 3700 11152 3700 11234 3747 11208

$$

McInerney

500 
WGUS75 KSLC 180237
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
837 PM MDT TUE JUL 17 2018

UTC025-180245-
/O.EXP.KSLC.FF.W.0032.000000T0000Z-180718T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kane UT-
837 PM MDT TUE JUL 17 2018

...THE FLASH FLOOD WARNING FOR CENTRAL KANE COUNTY WILL EXPIRE AT 845
PM MDT...

Flash flooding along the Paria Drainage has receded.  It is inferred 
though that residual high water will be coursing through the 
waterways throughout the nighttime hours. 

Please use prudent judgement if you plan on traveling around the 
Lower Paria and it's tributaries through the next 18 hours.

 
LAT...LON 3750 11160 3700 11152 3700 11234 3747 11208

$$

McInerney

Area Forecast Discussion
National Weather Service Salt Lake City UT
356 PM MDT Tue Jul 17 2018

.SYNOPSIS...High pressure will strengthen for the mid-week period,
bringing a drying trend to the state. Moisture will slowly creep
north late in the week into the weekend.

&&

.SHORT TERM (Through 06Z Saturday)...The jet on the backside of
the trough that moved across northern Utah last night is still
creating some lift across far northern Utah this afternoon.
However, moisture is becoming less available so believe isolated
showers and thunderstorms will end before sunset. Farther east and
south in the deeper moisture thunderstorms are firing up once
again this afternoon and are tracking more southeast today vs
south or southwest which has been problematic for flash flooding
since many tributaries are oriented north to south over the
western half of Kane County and Washington County.

There does not appear to be any relief in the deep moisture over
the south the next few days but the flow does become nearly
stagnant Wednesday into Thursday as the center of the 500mb ridge
moves overhead. This may inhibit the strength of the thunderstorms
as they will be vertically stacked, meaning the updraft ends up
being directly under the downdraft once it forms which will kill
the updraft. These are called pulse storms because they don't last
long. By late Thursday the flow aloft becomes more southeast
aloft across southwest Utah as the ridge moves to the 4 corners
region and farther east. This ridge position opens the door for
monsoonal moisture to stream northward Friday and beyond.

The hottest temperatures are expected across northern Utah
Wednesday as the 700mb temps flirt with 17-18C. The 700mb temps
will tend to lower a tad Thursday and Friday as more moisture
enters the picture. Southern Utah will have nearly similar
temperatures each day and 700mb temps remain nearly constant.

.LONG TERM (After 06Z Saturday)...With the ridge axis firmly in
place over Texas by Saturday morning, monsoonal moisture continues
to stream northward into the forecast area over the weekend. While
GFS PWAT values are not as impressive as past runs, much of the area
remains in 0.75 to 1 inch into Monday. Maintaining confidence in
convective activity throughout the weekend, with temps a bit above
seasonal norms.

Global models differing in extent of drying early in the workweek,
as such have left slight chance/chance of PoPs into Day 7. Expecting
temps to be riding along seasonal norms for the north, a bit above
in the south.

&&

.AVIATION...Conditions at the KSLC terminal are expected to remain
at VFR through the evening. North winds in place are expected to
shift to the south between 03-04z, with a small chance that nearby
showers create gusty erratic winds before 03z.

&&

.FIRE WEATHER...Isolated to scattered showers and thunderstorms will
occur over the eastern and southern portions of fire district this
evening and then mainly over southern Utah Wednesday and Thursday.
Moisture will spread northward Friday into northern Utah and there
could be dry lightning along the leading edge of this moisture,
but looks to be brief if it does occur. Elevated RH values will
remain over the south through the forecast period. However, min
RH values have dropped into the lower teens across northwest deserts
today and this should spread into the northern portions of the
western valleys Wednesday and possibly into Thursday. Rh values
are expected to come up through the weekend.

&&

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

SHORT TERM...Struthwolf
LONG TERM...Verzella
AVIATION...Dewey
FIRE WEATHER...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

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1223 PM MDT TUE JUL 17 2018

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

0955 PM     TSTM WND GST     10 SSW DUGWAY           40.11N 112.81W
07/16/2018  M58.00 MPH       TOOELE             UT   MESONET

            DURAND ROAD WIND SESNOR ON THE DUGWAY PROVING GROUNDS
            MEASURED A PEAK WIND GUST OF 58 MPH

1005 PM     TSTM WND GST     9 N LAKESIDE            41.33N 112.85W
07/16/2018  M58.00 MPH       BOX ELDER          UT   MESONET

            GUNNISON ISLAND UUNET SENSOR

1140 PM     TSTM WND GST     5 SSW WEST VALLEY CITY  40.64N 112.06W
07/16/2018  M58.00 MPH       SALT LAKE          UT   MESONET

            BACCUS/SR111 UDOT SENSOR MEASURED 58 MPH WIND GUST

&&

BONNETTE

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
100 PM MDT TUE JUL 17 2018

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

0545 PM     FLASH FLOOD      9 ENE KANAB             37.11N 112.38W
07/16/2018                   KANE               UT   PUBLIC

            LARGE DEBRIS FLOW FROM A FLASH FLOOD IN JOHNSON WASH
            FLOWING SOUTH TOWARD HIGHWAY 89.

&&

CDEWEY

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
104 PM MDT TUE JUL 17 2018

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

0611 AM     FLASH FLOOD      14 NE KANAB             37.21N 112.38W
07/16/2018                   KANE               UT   PUBLIC

            DEBRIS FLOW FROM FLASH FLOOD IN JOHNSON WASH WITH LARGE
            LOGS FLOWING SOUTH.

&&

CDEWEY

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
112 PM MDT TUE JUL 17 2018

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

0440 AM     FLASH FLOOD      1 NW KANAB              37.05N 112.54W
07/16/2018                   KANE               UT   PUBLIC

            PUBLIC REPORTS FLOODED ROADWAYS WITH WATER RUSHING OVER
            ROADS AND COVERING INTERSECTIONS AT THE MOUTH OF KANAB
            CREEK IN TOWN.

&&

CDEWEY

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
225 PM MDT TUE JUL 17 2018

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

0100 PM     DEBRIS FLOW      10 S DUCHESNE           40.03N 110.39W
07/17/2018                   DUCHESNE           UT   DEPT OF HIGHWAYS

            MUD AND DEBRIS ABOUT 3 FEET DEEP FLOWED ACROSS US-191 AT
            MP 284, WITH RADAR REPORTING AN INCH STORM TOTAL OVER
            CANYON BY 1PM. EVENT LIKELY OCCURED BETWEEN 1 AND 130 PM,
            REPORTED BY UDOT SHED SUPERVISOR.

&&

LVERZEL

Special Weather Statement
National Weather Service Salt Lake City UT
421 PM MDT TUE JUL 17 2018

UTZ010-012-013-172300-
San Rafael Swell UT-Wasatch Plateau/Book Cliffs UT-Castle Country UT-
421 PM MDT TUE JUL 17 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL EMERY AND SOUTH
CENTRAL CARBON COUNTIES UNTIL 500 PM MDT...

At 420 PM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm near Wellington, or near Price...moving southeast
at 15 mph.

Half inch hail and winds in excess of 40 mph will be possible, along
with brief intense rainfall.

Locations impacted include...
Wellington, Sunnyside and East Carbon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

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 3953 11083 3964 11065 3953 11035 3933 11059
TIME...MOT...LOC 2220Z 312DEG 12KT 3960 11071

GM