Alert archive / Utah / Special Weather Statements in 2018

Special Weather Statement, NWS Salt Lake City, UT

July 23, 2018

NWS Salt Lake City, UT issued this special weather statement at Jul 23, 2018, 4:49 PM MDT. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 23, 2018, 4:49 PM MDT (22:49 UTC)
Expired
Jul 23, 2018, 5:30 PM MDT
In force
41 min
Issued by
NWS Salt Lake City, UT

The radar

The Cedar City radar (KICX), 65 km from the middle of the area, began a volume at 22:50 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 10.8 hours before the alert went out and 276 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Flgstf/Belemont, AZ at 12:00Z on 2018-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 32 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 12:00Z on 2018-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
32 J/kg
Mixed-layer CIN
-274 J/kg
Mixed-layer LCL
2216 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
42 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Salt Lake City, UT wrote its last area forecast discussion before this special weather statement went out at Jul 23, 3:51 PM MDT, 58 minutes earlier.

Area forecast discussion, Jul 23, 3:51 PM MDT, 58 minutes before
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</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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Hazardous weather outlook, Jul 23, 5:52 AM MDT, 10 hours 57 minutes before
Hazardous Weather Outlook
National Weather Service Salt Lake City UT
552 AM MDT Mon Jul 23 2018

UTZ001>016-019>021-517-518-WYZ021-241300-
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-
552 AM MDT Mon Jul 23 2018

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

.DAY ONE...Today and Tonight

Showers and thunderstorms will be remain possible, mainly over the
higher terrain and adjacent valleys. Gusty winds and small hail
will be possible with the stronger storms. Isolated flash flooding
will remain possible, mainly near recent burn scars.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Temperatures will be very warm on Tuesday and remain elevated
through most the week. Consecutive days of warm temperatures
during both the daytime and overnight hours will lead to an
increased threat of heat-related illnesses.

.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

In the hours before

Local storm report, Jul 23, 11:17 AM MDT, 5 hours 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1117 AM MDT MON JUL 23 2018

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

0355 PM     FLASH FLOOD      8 SSE FRUITLAND         40.13N 110.75W
07/22/2018                   DUCHESNE           UT   NWS EMPLOYEE

            WATER RESCUES IN THE CAMELOT RESORT WITH REPORTS OF
            IMPASSABLE ROADS IN STRAWBERRY RIVER BASIN. DEBRIS FLOWS
            OFF OF THE DOLLAR RIDGE FIRE SPAWNED THIS FLOODING.

0546 PM     FLASH FLOOD      6 S MARYSVALE           38.35N 112.26W
07/22/2018                   PIUTE              UT   DEPT OF HIGHWAYS

            US89 CLOSED AT MP173 DUE TO FLOODING AND MUD MAKING
            ROADWAY IMPASSABLE

&&

MSTRUTHW
Special weather statement, Jul 23, 3:42 PM MDT, 1 hour 7 minutes before
Special Weather Statement
National Weather Service Salt Lake City UT
342 PM MDT MON JUL 23 2018

UTZ013-517-232230-
San Rafael Swell UT-Central and Southwest Mountains UT-
342 PM MDT MON JUL 23 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN EMERY AND EAST
CENTRAL SEVIER COUNTIES UNTIL 430 PM MDT...

At 341 PM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm 18 miles northeast of Bicknell, or 21 miles
northwest of Capitol Reef National Park...moving northeast at 5 mph.

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

This storm will remain over mainly rural areas of southwestern Emery
and east central Sevier Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

Strong winds with these storms may occur well ahead of any rain or
lightning. Do not wait for the sound of thunder before taking cover.

&&

LAT...LON 3852 11127 3864 11143 3882 11126 3863 11100
TIME...MOT...LOC 2141Z 224DEG 6KT 3857 11136

Bonnette
Special weather statement, Jul 23, 4:49 PM MDT, 0 minutes before
Special Weather Statement
National Weather Service Salt Lake City UT
449 PM MDT MON JUL 23 2018

UTZ020-518-232330-
Southern Utah Mountains UT-South Central Utah UT-
449 PM MDT MON JUL 23 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN GARFIELD COUNTY
UNTIL 530 PM MDT...

At 449 PM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm over Bryce Canyon National Park, or 32 miles west
of Escalante...moving northeast at 10 mph.

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

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3759 11220 3773 11230 3789 11205 3767 11192
TIME...MOT...LOC 2249Z 238DEG 8KT 3767 11218

DVC

The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 23, 3:42 PM MDTSpecial Weather StatementSLCWayne48 min
Jul 23, 4:04 PM MDTSevere Thunderstorm WarningSLCCarbon, Duchesne41 min
Jul 23, 4:57 PM MDTSevere Thunderstorm WarningSLCGarfield33 min

Nearby

Special Weather Statements in Utah, 2018Every special weather statement in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.