Alert archive / Utah / Special Weather Statements in 2021
Special Weather Statement, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this special weather statement at Aug 5, 2021, 6:12 PM MDT for Box Elder County, Tooele County, Utah. It was in force for 48 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 5, 2021, 6:12 PM MDT (00:12 UTC)
- Expired
- Aug 5, 2021, 7:00 PM MDT
- In force
- 48 min
- Issued by
- NWS Salt Lake City, UT
- Hail
- 0.00 in
- Wind
- 55
Counties Box Elder County, UT, Tooele County, UT
The radar
The Salt Lake City radar (KMTX), 76 km from the middle of the area, began a volume at 00:13 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 00:00Z, 0.2 hours before the alert went out and 82 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.
- Mixed-layer CAPE
- 340 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 3854 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted.
004
WWUS85 KSLC 060012
SPSSLC
Special Weather Statement
National Weather Service Salt Lake City UT
612 PM MDT Thu Aug 5 2021
UTZ101-060100-
Great Salt Lake Desert and Mountains UT-
612 PM MDT Thu Aug 5 2021
...Strong thunderstorms will impact portions of western Box Elder and
western Tooele Counties through 700 PM MDT...
At 611 PM MDT, Doppler radar indicated a broad area of showers
capable of producing gusty winds along a line extending from near
Juniper to near Utah Test and Training Range South. Movement was
east at 10 mph. Automated weather observing stations reported wind
gusts to 55 mph in Lucin and over the Bonneville Salt Flats.
HAZARD...Wind gusts of 40 to 55 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Wendover, Park Valley, Dugway Proving Ground Test Range, Utah Test
and Training Range North, Clive, Utah Test and Training Range South,
Knolls, Great Salt Lake North of the Causeway, Etna, Grouse Creek,
Lynn, Bonneville Salt Flats, Locomotive Springs, Lucin and Rosette.
This includes the following highways...
Interstate 80 in Utah between mile markers 0 and 57.
Utah Route 30 between mile markers 0 and 86.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4197 11284 4019 11303 4014 11405 4196 11404
TIME...MOT...LOC 0011Z 266DEG 8KT 4197 11307 4038 11341
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH
$$
MTThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 7:36 PM MDT | Special Weather Statement | SLC | Davis, Salt Lake | 39 min |
| Aug 5, 9:50 PM MDT | Special Weather Statement | SLC | Davis, Weber | 40 min |
| Aug 5, 10:27 PM MDT | Special Weather Statement | SLC | Rich | 33 min |
| Aug 5, 10:33 PM MDT | Special Weather Statement | SLC | Weber | 27 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.