Alert archive / Utah / High Wind Watches in 2021

High Wind Watch 4, NWS Salt Lake City, UT

May 18, 20215 counties in Utah

NWS Salt Lake City, UT issued this high wind watch at May 18, 2021, 3:29 PM MDT for 5 counties in Utah. It took effect at May 20, 2021, 12:00 PM MDT. It was in force for .

The area

The counties it named.

The facts

Issued
May 18, 2021, 3:29 PM MDT (21:29 UTC)
In effect from
May 20, 2021, 12:00 PM MDT
Expired
May 19, 2021, 10:38 AM MDT
In force
Issued by
NWS Salt Lake City, UT

Counties Beaver County, UT, Iron County, UT, Juab County, UT, Millard County, UT, Washington County, UT

The radar

The Cedar City radar (KICX), 100 km from the middle of the area, began a volume at 21:32 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

Salt Lake City I, UT (KSLC), launched 12:00Z, 9.5 hours before the alert went out and 281 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, Salt Lake City I, UT at 12:00Z on 2021-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 12:00Z on 2021-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2232 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

802 
WWUS75 KSLC 182129
NPWSLC

URGENT - WEATHER MESSAGE
National Weather Service Salt Lake City UT
329 PM MDT Tue May 18 2021

UTZ115-122-191200-
/O.NEW.KSLC.HW.A.0004.210520T1800Z-210521T0300Z/
Western Millard and Juab Counties-Southwest Utah-
Including the cities of Delta, Little Sahara, Beaver, Cedar City,
and Milford
329 PM MDT Tue May 18 2021

...HIGH WIND WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH
THURSDAY EVENING...

* WHAT...South to southwest winds 30 to 40 mph with gusts in
  excess of 60 mph possible.

* WHERE...Western Millard and Juab Counties and Southwest Utah.

* WHEN...From Thursday afternoon through Thursday evening.

* IMPACTS...High winds may move loose debris, damage property 
  and cause power outages. Travel could be difficult especially 
  for high profile vehicles.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Watch means there is the potential for a hazardous
high wind event. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or stronger may occur. Continue to monitor the latest
forecasts.

Monitor the latest forecasts and warnings for updates on this
situation. Fasten loose objects or shelter objects in a safe
location prior to the onset of winds.

&&

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity

For information on potential travel impacts visit...
http://udottraffic.utah.gov/roadweatherforecast.aspx
2 follow-up statements
404 
WWUS75 KSLC 190930
NPWSLC

URGENT - WEATHER MESSAGE
National Weather Service Salt Lake City UT
330 AM MDT Wed May 19 2021

UTZ115-122-192200-
/O.CON.KSLC.HW.A.0004.210520T1800Z-210521T0300Z/
Western Millard and Juab Counties-Southwest Utah-
Including the cities of Delta, Little Sahara, Beaver, Cedar City,
and Milford
330 AM MDT Wed May 19 2021

...HIGH WIND WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON
THROUGH THURSDAY EVENING...

* WHAT...South to southwest winds 30 to 40 mph with gusts in 
  excess of 60 mph possible.

* WHERE...Western Millard and Juab Counties and Southwest Utah.

* WHEN...From Thursday afternoon through Thursday evening.

* IMPACTS...High winds may move loose debris, damage property 
  and cause power outages. Travel could be difficult especially 
  for high profile vehicles. Blowing dust may reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts and warnings for updates on this
situation. Fasten loose objects or shelter objects in a safe
location prior to the onset of winds.

&&

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity

For information on potential travel impacts visit...
http://udottraffic.utah.gov/roadweatherforecast.aspx
802 
WWUS75 KSLC 191638
NPWSLC

URGENT - WEATHER MESSAGE
National Weather Service Salt Lake City UT
1038 AM MDT Wed May 19 2021

UTZ115-122-200045-
/O.UPG.KSLC.HW.A.0004.210520T1800Z-210521T0300Z/
/O.NEW.KSLC.HW.W.0006.210520T1800Z-210521T0300Z/
Western Millard and Juab Counties-Southwest Utah-
Including the cities of Delta, Little Sahara, Beaver, Cedar City,
and Milford
1038 AM MDT Wed May 19 2021

...HIGH WIND WARNING IN EFFECT FROM NOON TO 9 PM MDT THURSDAY...

* WHAT...Southwest winds 30 to 40 mph with gusts up to 65 mph 
  expected. Blowing dust will result in areas of limited 
  visibility.

* WHERE...Western Millard and Juab Counties and Southwest Utah.

* WHEN...From noon to 9 PM MDT Thursday.

* IMPACTS...High winds may move loose debris, damage property and
  cause power outages. Travel will be difficult especially for
  high profile vehicles. Blowing dust will result in areas of
  limited visibility.

* ADDITIONAL DETAILS...Very strong cross winds expected on 
  portions of US-50, SR-21, and on I-15 at Hamilton's Fort just 
  south of Cedar City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People are urged to secure loose objects that could be blown
around or damaged by the wind.

&&

$$

UTZ116-119>121-123-124-126>130-200045-
/O.NEW.KSLC.WI.Y.0022.210520T1800Z-210521T0300Z/
Eastern Juab/Millard Counties-Sevier Valley-Castle Country-
San Rafael Swell-Lower Washington County-Zion National Park-
Upper Sevier River Valleys-Bryce Canyon Country-
South Central Utah-Capitol Reef National Park and Vicinity-
Western Canyonlands-
Including the cities of Nephi, Scipio, Fillmore, Richfield, 
Salina, Price, Castle Dale, Emery, Green River, Goblin Valley, 
St George, Hurricane, Ivins, Springdale, Panguitch, Circleville, 
Koosharem, Bryce Canyon City, Kanab, Escalante, Loa, Torrey, 
and Hanksville
1038 AM MDT Wed May 19 2021

...WIND ADVISORY IN EFFECT FROM NOON TO 9 PM MDT THURSDAY...

* WHAT...Southwest winds 20 to 30 mph with gusts up to 50 mph
  expected. Patchy areas of blowing dust possible.

* WHERE...Portions of central, southern and southwest Utah.

* WHEN...From noon to 9 PM MDT Thursday.

* IMPACTS...Gusty winds could blow around unsecured objects. A few
  power outages are possible. Travel may be difficult for high
  profile vehicles. 

* ADDITIONAL DETAILS...Patchy areas of blowing dust may result in
  localized visibility restrictions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity

For information on potential travel impacts visit...
http://udottraffic.utah.gov/roadweatherforecast.aspx

Nearby

High Wind Watches in Utah, 2021Every high wind watch in 2021

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.