Alert archive / Utah / Special Weather Statements in 2020
Special Weather Statement, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this special weather statement at Aug 22, 2020, 5:13 PM MDT. It was in force for 32 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 22, 2020, 5:13 PM MDT (23:13 UTC)
- Expired
- Aug 22, 2020, 5:45 PM MDT
- In force
- 32 min
- Issued by
- NWS Salt Lake City, UT
The radar
The Cedar City radar (KICX), 67 km from the middle of the area, began a volume at 23:14 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, 11.2 hours before the alert went out and 284 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
- 424 J/kg
- Mixed-layer CIN
- -402 J/kg
- Mixed-layer LCL
- 2877 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>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 22, 3:12 PM MDT, 2 hours 1 minute earlier.
Area forecast discussion, Aug 22, 3:12 PM MDT, 2 hours 1 minute before
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</html>Hazardous weather outlook, Aug 22, 5:33 AM MDT, 11 hours 40 minutes before
Hazardous Weather Outlook National Weather Service Salt Lake City UT 533 AM MDT Sat Aug 22 2020 UTZ001>016-019>021-517-518-WYZ021-231200- 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- 533 AM MDT Sat Aug 22 2020 This Hazardous Weather Outlook is for the western two thirds of Utah and southwest Wyoming. .DAY ONE...Today and Tonight Isolated afternoon and early evening thunderstorms across portions of southwest, central and eastern Utah will generate little or no rain, but could produce gusty outflow winds. Critical fire weather conditions will exist across southwest and central Utah due to this thunderstorm activity through early this evening. Smoke from wildfires in California will produce poor air quality and reduced visibilities across portions of northern Utah again today. .DAYS TWO THROUGH SEVEN...Sunday through Friday Afternoon and evening thunderstorms will remain a possibility across the eastern half of Utah and southwest Wyoming Sunday. Minimal rainfall is expected from these showers and thunderstorms. Moisture is expected to increase across the area with an increasing areal coverage of showers and thunderstorms early next week. Measurable rainfall could result from some of these showers and thunderstorms, which would be the first significant rainfall in the month of August. Somewhat drier conditions will return midweek, followed by an increase in shower and thunderstorm activity at the end of the week. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. 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
Special weather statement, Aug 22, 3:06 PM MDT, 2 hours 7 minutes before
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</html>Special weather statement, Aug 22, 3:31 PM MDT, 1 hour 42 minutes before
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</html>Special weather statement, Aug 22, 5:13 PM MDT, 0 minutes before
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</html>The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 2:56 AM MDT | Red Flag Warning | SLC | Beaver, Garfield, Iron, Kane, Millard, Piute and 4 more | 42 hr |
| Aug 22, 2:37 PM MDT | Red Flag Warning | SLC | Beaver, Cache, Carbon, Duchesne, Emery, Garfield and 12 more | 30 hr |
| Aug 22, 3:06 PM MDT | Special Weather Statement | SLC | Piute | 24 min |
| Aug 22, 3:31 PM MDT | Special Weather Statement | SLC | Sevier | 44 min |
Nearby
Special Weather Statements in Utah, 2020Every special weather statement in 2020
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.