Alert archive / Utah / Special Weather Statements in 2021

Special Weather Statement, NWS Salt Lake City, UT

May 14, 2021Davis County, Utah

NWS Salt Lake City, UT issued this special weather statement at May 14, 2021, 5:50 PM MDT for Davis County, Utah. It was in force for 40 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
May 14, 2021, 5:50 PM MDT (23:50 UTC)
Expired
May 14, 2021, 6:30 PM MDT
In force
40 min
Issued by
NWS Salt Lake City, UT

County Davis County, UT

The radar

The Salt Lake City radar (KMTX), 55 km from the middle of the area, began a volume at 23:52 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, 11.8 hours before the alert went out and 17 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 2021-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 2021-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 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
7 J/kg
Mixed-layer CIN
-193 J/kg
Mixed-layer LCL
3117 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
157 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 May 14, 3:59 PM MDT, 1 hour 51 minutes earlier.

Area forecast discussion, May 14, 3:59 PM MDT, 1 hour 51 minutes before
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Hazardous weather outlook, May 14, 4:18 AM MDT, 13 hours 32 minutes before
Hazardous Weather Outlook
National Weather Service Salt Lake City UT
418 AM MDT Fri May 14 2021

UTZ101>131-WYZ021-151200-
Great Salt Lake Desert and Mountains-Tooele and Rush Valleys-
Eastern Box Elder County-Northern Wasatch Front-Salt Lake Valley-
Utah Valley-Cache Valley/Utah Portion-Wasatch Back-
Bear Lake and Bear River Valley-Wasatch Mountains I-80 North-
Wasatch Mountains South of I-80-Western Uinta Mountains-
Wasatch Plateau/Book Cliffs-Western Uinta Basin-
Western Millard and Juab Counties-Eastern Juab/Millard Counties-
Central Mountains-Sanpete Valley-Sevier Valley-Castle Country-
San Rafael Swell-Southwest Utah-Lower Washington County-
Zion National Park-Southern Mountains-Upper Sevier River Valleys-
Bryce Canyon Country-South Central Utah-
Capitol Reef National Park and Vicinity-Western Canyonlands-
Glen Canyon Recreation Area/Lake Powell-Southwest Wyoming-
418 AM MDT Fri May 14 2021

This Hazardous Weather Outlook is for portions of central Utah...
northern Utah...southern Utah...southwest Utah and southwest
Wyoming.

.DAY ONE...Today and Tonight

Isolated showers and thunderstorms near the Idaho border Friday
afternoon will become more widely scattered across northern Utah
late Friday afternoon and evening and will be capable of
producing gusty winds.

Critical fire weather conditions will return across southern Utah
today due to gusty winds and low humidity.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Critical fire weather conditions will become more widespread on
Saturday as winds increase in very dry conditions ahead of the
next approaching storm system. These conditions may continue into
Sunday.

Patchy areas of blowing dust are expected Saturday across
portions of southwest, west-central and south-central Utah as
wind gusts up to 40 mph interact with very dry antecedent
conditions.

Widely scattered across northern Utah on Saturday and will be
capable of producing gusty winds.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any information
about observed severe weather to the NWS while following all
local, state, and CDC guidelines.

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

Special weather statement, May 14, 2:37 PM MDT, 3 hours 13 minutes before
Special Weather Statement
National Weather Service Salt Lake City UT
237 PM MDT Fri May 14 2021

UTZ103-107-110-142100-
Eastern Box Elder County UT-Wasatch Mountains I-80 North UT-
Cache Valley/Utah Portion UT-
237 PM MDT Fri May 14 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CACHE AND
NORTHEASTERN BOX ELDER COUNTIES UNTIL 300 PM MDT...

At 236 PM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm near Plymouth, or 12 miles north of Tremonton...
moving east at 30 mph.

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

Locations impacted include...
Logan, Cache, Smithfield, Lewiston, Clarkston, Trenton, Plymouth,
Peter, Riverside, Benson, Utah State University, North Logan, Hyde
Park, Richmond, Garland, Newton, Amalga, Fielding, Cornish and
Collinston.

This includes the following highways...
 Interstate 15 between mile markers 383 and 395.
 Interstate 84 between mile markers 36 and 37.
 US Route 89 between mile markers 466 and 472.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4176 11163 4174 11226 4191 11229 4200 11181
      4200 11167
TIME...MOT...LOC 2036Z 261DEG 27KT 4186 11208

Webber
Special weather statement, May 14, 3:00 PM MDT, 2 hours 50 minutes before
Special Weather Statement
National Weather Service Salt Lake City UT
300 PM MDT Fri May 14 2021

UTZ103-107-110-142115-
Eastern Box Elder County UT-Wasatch Mountains I-80 North UT-
Cache Valley/Utah Portion UT-
300 PM MDT Fri May 14 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CACHE AND
NORTHEASTERN BOX ELDER COUNTIES UNTIL 315 PM MDT...

At 300 PM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm near Cache, or 10 miles northwest of Logan...
moving east at 20 mph.

Winds in excess of 40 mph will be possible.

Locations impacted include...
Logan, Cache, Smithfield, Lewiston, Clarkston, Trenton, Peter,
Benson, North Logan, Hyde Park, Richmond, Newton and Amalga.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4178 11206 4192 11206 4199 11177 4176 11177
TIME...MOT...LOC 2100Z 262DEG 19KT 4186 11195

Webber
Special weather statement, May 14, 3:56 PM MDT, 1 hour 54 minutes before
Special Weather Statement
National Weather Service Salt Lake City UT
356 PM MDT Fri May 14 2021

UTZ101-103-142245-
Eastern Box Elder County UT-Great Salt Lake Desert and Mountains UT-
356 PM MDT Fri May 14 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL BOX ELDER COUNTY
UNTIL 445 PM MDT...

At 356 PM MDT, National Weather Service Doppler radar indicated
strong thunderstorms along a line extending from near Snowville to 8
miles south of Park Valley...and moving northeast at 20 mph.

Wind gusts of 40 to 55 mph will be possible. A wind gust to 51 mph
was recently observed along SR-30 at Curlew Junction.

Locations impacted include...
Snowville, Howell and Locomotive Springs.

This includes the following highways...
 Interstate 84 between mile markers 3 and 25.
 Utah Route 30 between mile markers 87 and 90.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Strong winds with these showers may occur well ahead of any rain. Do
not wait for rain or the sound of thunder before taking cover. SEEK
SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.

&&

LAT...LON 4164 11264 4164 11345 4200 11276 4200 11225
      4199 11224
TIME...MOT...LOC 2156Z 243DEG 19KT 4202 11273 4170 11333

MT
Special weather statement, May 14, 5:50 PM MDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 14, 2:37 PM MDTSpecial Weather StatementSLCCache23 min
May 14, 3:00 PM MDTSpecial Weather StatementSLCCache15 min
May 14, 3:56 PM MDTSpecial Weather StatementSLCBox Elder49 min

Nearby

Special Weather Statements in Utah, 2021Every special weather statement 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.