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, 10:33 PM MDT for Weber County, Utah. It was in force for 27 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, 10:33 PM MDT (04:33 UTC)
- Expired
- Aug 5, 2021, 11:00 PM MDT
- In force
- 27 min
- Issued by
- NWS Salt Lake City, UT
- Hail
- 0.00 in
- Wind
- 50
County Weber County, UT
The radar
The Salt Lake City radar (KMTX), 49 km from the middle of the area, began a volume at 04:37 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 00:00Z, 4.6 hours before the alert went out and 64 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
- 154 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 4199 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
420
WWUS85 KSLC 060433
SPSSLC
Special Weather Statement
National Weather Service Salt Lake City UT
1033 PM MDT Thu Aug 5 2021
UTZ103-104-107-108-110-060500-
Eastern Box Elder County UT-Wasatch Back UT-
Northern Wasatch Front UT-Wasatch Mountains I-80 North UT-
Cache Valley/Utah Portion UT-
1033 PM MDT Thu Aug 5 2021
...Showers capable of producing strong gusty winds will impact
portions of central Weber... southwestern Cache...east central Box
Elder...northeastern Davis and southwestern Morgan Counties through
1100 PM MDT...
At 1033 PM MDT, Doppler radar was tracking showers with a history of
producing strong gust winds along a line extending from Brigham City
to near Morgan. Movement was east at 20 mph. Wind gusts in excess of
40 mph have been observed with these showers.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Ogden, Layton, Farmington, Brigham City, Morgan, Hill Air Force Base,
Roy, Clearfield, Kaysville, Clinton, North Ogden, South Ogden,
Centerville, Washington Terrace, Riverdale, Hyrum, South Weber,
Perry, Wellsville and Willard.
This includes the following highways...
Interstate 15 between mile markers 320 and 371.
Interstate 84 between mile markers 82 and 105.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4169 11179 4091 11161 4092 11195 4158 11223
TIME...MOT...LOC 0433Z 262DEG 18KT 4154 11200 4101 11177
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 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, 6:12 PM MDT | Special Weather Statement | SLC | Box Elder, Tooele | 48 min |
| 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 |
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.