Alert archive / Utah / Special Weather Statements in 2021

Special Weather Statement, NWS Salt Lake City, UT

September 12, 2021Box Elder County, Utah

NWS Salt Lake City, UT issued this special weather statement at Sep 12, 2021, 6:46 PM MDT for Box Elder County, Utah. It was in force for 44 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: Sep 12, 2021, 6:46 PM MDT (00:46 UTC)
Expired: Sep 12, 2021, 7:30 PM MDT
In force: 44 min
Issued by: NWS Salt Lake City, UT
Hail: 0.50 in
Wind: 55

County Box Elder County, UT

The radar

The Salt Lake City radar (KMTX), 111 km from the middle of the area, began a volume at 00:46 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 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 Sep 12, 4:25 PM MDT, 2 hours 21 minutes earlier.

Area forecast discussion, Sep 12, 4:25 PM MDT, 2 hours 21 minutes before

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In the hours before

Special weather statement, Sep 12, 3:29 PM MDT, 3 hours 17 minutes before

Special Weather Statement
National Weather Service Salt Lake City UT
329 PM MDT Sun Sep 12 2021

UTZ101-122215-
Great Salt Lake Desert and Mountains UT-
329 PM MDT Sun Sep 12 2021

...A strong thunderstorm will impact portions of west central Box
Elder County through 415 PM MDT...

At 328 PM MDT, Doppler radar was tracking a strong thunderstorm 13
miles northeast of Montello, moving east at 35 mph.

HAZARD...Wind gusts of 50 to 55 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could blow around unsecured objects. Minor
         damage to outdoor objects is possible.

Locations impacted include...
Lucin.

This includes Utah Route 30 between mile markers 1 and 32.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4165 11343 4134 11330 4123 11404 4144 11404
TIME...MOT...LOC 2128Z 249DEG 30KT 4136 11396

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH

CRK

Special weather statement, Sep 12, 4:13 PM MDT, 2 hours 33 minutes before

Special Weather Statement
National Weather Service Salt Lake City UT
413 PM MDT Sun Sep 12 2021

UTZ101-122300-
Great Salt Lake Desert and Mountains UT-
413 PM MDT Sun Sep 12 2021

...Strong thunderstorms will impact portions of northwestern Box
Elder County through 500 PM MDT...

At 413 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 9 miles west of Juniper to 8 miles west of Park
Valley. Movement was east at 30 mph.

HAZARD...Wind gusts of 50 to 55 mph and nickel size 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...
Park Valley, Curlew Junction, Locomotive Springs and Rosette.

This includes Utah Route 30 between mile markers 41 and 87.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4189 11273 4188 11272 4170 11293 4172 11364
      4200 11328 4199 11284
TIME...MOT...LOC 2213Z 268DEG 26KT 4204 11316 4178 11349

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH

CRK

Special weather statement, Sep 12, 5:14 PM MDT, 1 hour 32 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
Sep 12, 7:35 PM MDT	Special Weather Statement	SLC		40 min
Sep 12, 8:09 PM MDT	Special Weather Statement	SLC		51 min
Sep 12, 8:23 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder	37 min
Sep 12, 8:57 PM MDT	Special Weather Statement	SLC	Box Elder	48 min
Sep 12, 8:59 PM MDT	Special Weather Statement	SLC	Box Elder	46 min

Nearby

Special Weather Statements in Utah, 2021 Every 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; radar from the NEXRAD Level II archive.