Alert archive / Utah / Special Weather Statements in 2022

Special Weather Statement, NWS Salt Lake City, UT

August 4, 2022Iron County, Utah

NWS Salt Lake City, UT issued this special weather statement at Aug 4, 2022, 3:30 PM MDT for Iron County, Utah. It was in force for 30 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: Aug 4, 2022, 3:30 PM MDT (21:30 UTC)
Expired: Aug 4, 2022, 4:00 PM MDT
In force: 30 min
Issued by: NWS Salt Lake City, UT
Hail: 0.50 in
Wind: 50

County Iron County, UT

The radar

The Cedar City radar (KICX), 49 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

Las Vegas, NV (KVEF), launched 12:00Z, 9.5 hours before the alert went out and 237 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: 326 J/kg
Mixed-layer CIN: -216 J/kg
Mixed-layer LCL: 2768 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: -2 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 Aug 4, 5:20 AM MDT, 10 hours 10 minutes earlier.

Area forecast discussion, Aug 4, 5:20 AM MDT, 10 hours 10 minutes before

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In the hours before

Special weather statement, Aug 4, 2:50 PM MDT, 40 minutes before

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Special weather statement, Aug 4, 3:18 PM MDT, 12 minutes before

Special Weather Statement
National Weather Service Salt Lake City UT
318 PM MDT Thu Aug 4 2022

UTZ128-042145-
South Central Utah UT-
318 PM MDT Thu Aug 4 2022

...A strong thunderstorm will impact portions of southwestern Kane
County through 345 PM MDT...

At 318 PM MDT, Doppler radar was tracking a strong thunderstorm 9
miles east of Kanab, moving northwest at 15 mph.  Additional
thunderstorms are in a line from northwest of Kanab to the
Utah/Arizona border.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Kanab, Orderville, Glendale and Mt Carmel.

This includes US Route 89 between mile markers 48 and 89.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 3719 11280 3734 11256 3732 11249 3700 11221
      3700 11253
TIME...MOT...LOC 2118Z 118DEG 13KT 3705 11235

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

CRK

Special weather statement, Aug 4, 3:27 PM MDT, 3 minutes before

Special Weather Statement
National Weather Service Salt Lake City UT
327 PM MDT Thu Aug 4 2022

UTZ122-125-042200-
Southwest Utah UT-Southern Mountains UT-
327 PM MDT Thu Aug 4 2022

...A strong thunderstorm will impact portions of south central Iron
County through 400 PM MDT...

At 327 PM MDT, Doppler radar was tracking a strong thunderstorm near
Cedar City, moving northwest at 10 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Cedar City, Enoch and Hamilton Fort.

This includes the following highways...
 Interstate 15 between mile markers 50 and 66.
 Utah Route 56 between mile markers 50 and 61.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 3761 11289 3751 11302 3765 11330 3783 11305
TIME...MOT...LOC 2127Z 137DEG 7KT 3763 11305

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

CRK

Special weather statement, Aug 4, 3:30 PM MDT, 0 minutes before

Special Weather Statement
National Weather Service Salt Lake City UT
330 PM MDT Thu Aug 4 2022

UTZ122-125-042200-
Southwest Utah UT-Southern Mountains UT-
330 PM MDT Thu Aug 4 2022

...A strong thunderstorm will impact portions of north central
Washington and south central Iron Counties through 400 PM MDT...

At 330 PM MDT, Doppler radar was tracking a strong thunderstorm 13
miles northwest of New Harmony, or 18 miles west of Cedar City,
moving northwest at 10 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Newcastle.

This includes the following highways...
 Utah Route 18 between mile markers 47 and 48.
 Utah Route 56 between mile markers 27 and 48.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 3765 11326 3751 11343 3766 11368 3787 11343
TIME...MOT...LOC 2130Z 137DEG 7KT 3765 11341

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

CRK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 2:44 PM MDT	Areal Flood Advisory	SLC	Iron	2 hr
Aug 4, 2:50 PM MDT	Special Weather Statement	SLC		25 min
Aug 4, 3:18 PM MDT	Special Weather Statement	SLC		27 min
Aug 4, 3:27 PM MDT	Special Weather Statement	SLC	Iron	33 min
Aug 4, 3:43 PM MDT	Special Weather Statement	SLC		32 min
Aug 4, 3:57 PM MDT	Special Weather Statement	SLC	Iron	33 min
Aug 4, 4:17 PM MDT	Special Weather Statement	SLC	Iron	28 min
Aug 4, 4:40 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Kane, Washington	3 hr
Aug 4, 5:16 PM MDT	Special Weather Statement	SLC	Tooele	44 min
Aug 4, 5:50 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Kane	3 hr
Aug 4, 5:55 PM MDT	Special Weather Statement	SLC	Kane	50 min

Nearby

Special Weather Statements in Utah, 2022 Every special weather statement in 2022

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.