Alert archive / Utah / Special Weather Statements in 2017

Special Weather Statement, NWS Salt Lake City, UT

June 20, 2017Salt Lake County, Utah

NWS Salt Lake City, UT issued this special weather statement at Jun 20, 2017, 5:49 PM MDT for Salt Lake County, Utah. 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: Jun 20, 2017, 5:49 PM MDT (23:49 UTC)
Expired: Jun 20, 2017, 6:30 PM MDT
In force: 41 min
Issued by: NWS Salt Lake City, UT

County Salt Lake County, UT

The radar

The Salt Lake City radar (KMTX), 93 km from the middle of the area, began a volume at 23:51 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

Elko, NV (KLKN), launched 12:00Z, 11.8 hours before the alert went out and 196 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 18 J/kg
Mixed-layer CIN: -437 J/kg
Mixed-layer LCL: 2349 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 34 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 Jun 20, 3:40 PM MDT, 2 hours 9 minutes earlier.

Area forecast discussion, Jun 20, 3:40 PM MDT, 2 hours 9 minutes before

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Hazardous weather outlook, Jun 20, 9:52 AM MDT, 7 hours 57 minutes before

Hazardous Weather Outlook
National Weather Service Salt Lake City UT
952 AM MDT Tue Jun 20 2017

UTZ001>016-019>021-517-518-WYZ021-211300-
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-
952 AM MDT Tue Jun 20 2017

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

.DAY ONE...Today and Tonight

Very hot temperatures will continue across the lower elevations
of the southern and southeastern portions of the outlook area
today. Triple digit readings will be common in these areas.

These hot temperatures can be dangerous for people engaging in
outdoor activities or for those who do not have adequate cooling
in their homes or businesses.

Remember...flows in the waterways of northern Utah and southwest
Wyoming remain fast and cold, and are still deadly. A person or
pet can drown in less than a minute in these waters.

Strong winds due to thunderstorms will be possible this afternoon
across the west desert and this evening along the Wasatch Front.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Very hot temperatures will continue across the lower elevations
of the southern and southeastern portions of the outlook area
through at least Thursday. Triple digit readings will be common
in these areas.

Temperatures across the remainder of the outlook area will run
between 10 and 15 degrees above normal through mid week.

Remember...waterways of northern Utah and southwest Wyoming will
continue to be dangerous with cold and fast flows expected
through the outlook period.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

Rogowski

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, Jun 20, 4:46 PM MDT, 1 hour 3 minutes before

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Local storm report, Jun 20, 4:58 PM MDT, 51 minutes before

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Local storm report, Jun 20, 5:17 PM MDT, 32 minutes before

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Local storm report, Jun 20, 5:25 PM MDT, 24 minutes before

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Special weather statement, Jun 20, 5:27 PM MDT, 22 minutes before

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Special weather statement, Jun 20, 5:49 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.

Issued	Product	Office	Counties	Lasted
Jun 20, 3:09 PM MDT	Fire Weather Watch	SLC	Beaver, Carbon, Duchesne, Emery, Garfield, Iron and 9 more	12 hr
Jun 20, 3:09 PM MDT	Red Flag Warning	SLC	Beaver, Garfield, Iron, Kane, Washington	31 hr
Jun 20, 3:15 PM MDT	Severe Thunderstorm Warning	SLC	Juab, Tooele	75 min
Jun 20, 4:12 PM MDT	Special Weather Statement	SLC	Box Elder	48 min
Jun 20, 4:27 PM MDT	Severe Thunderstorm Warning	SLC	Juab, Tooele	63 min
Jun 20, 4:34 PM MDT	Special Weather Statement	SLC	Tooele	41 min
Jun 20, 5:27 PM MDT	Special Weather Statement	SLC	Cache	48 min

Nearby

Special Weather Statements in Utah, 2017 Every special weather statement in 2017

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.