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 Jul 25, 2021, 4:21 PM MDT for Washington County, Utah. It was in force for 24 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
- Jul 25, 2021, 4:21 PM MDT (22:21 UTC)
- Expired
- Jul 25, 2021, 4:45 PM MDT
- In force
- 24 min
- Issued by
- NWS Salt Lake City, UT
County Washington County, UT
The radar
The Cedar City radar (KICX), 21 km from the middle of the area, began a volume at 22:22 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, 10.4 hours before the alert went out and 253 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
- 97 J/kg
- Mixed-layer CIN
- -248 J/kg
- Mixed-layer LCL
- 2117 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
318 WWUS85 KSLC 252221 SPSSLC Special Weather Statement National Weather Service Salt Lake City UT 421 PM MDT Sun Jul 25 2021 UTZ122-124-125-252245- Southwest Utah UT-Southern Mountains UT-Zion National Park UT- 421 PM MDT Sun Jul 25 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN WASHINGTON... NORTHWESTERN KANE AND SOUTH CENTRAL IRON COUNTIES UNTIL 445 PM MDT... At 420 PM MDT, National Weather Service Doppler radar indicated a strong thunderstorm 9 miles south of Cedar City...moving southwest at 35 mph. Half inch hail and wind gusts to 55 mph will be possible. Locations impacted include... Cedar City, Zion National Park, New Harmony, Kanarraville, Hamilton Fort and Kolob Canyon. This includes the following highways... Interstate 15 between mile markers 38 and 59. Utah Route 56 between mile markers 60 and 61. PRECAUTIONARY/PREPAREDNESS ACTIONS... If threatening weather approaches, take shelter in a sturdy building. Heavy rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3770 11308 3753 11287 3732 11310 3750 11334 TIME...MOT...LOC 2220Z 042DEG 30KT 3754 11303 $$ ND
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 7:17 PM MDT | Special Weather Statement | SLC | Garfield | 28 min |
| Jul 24, 8:08 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 3 hr |
| Jul 25, 2:25 PM MDT | Flash Flood Warning | SLC | Iron | 3 hr |
| Jul 25, 2:49 PM MDT | Special Weather Statement | SLC | Piute | 26 min |
| Jul 25, 2:53 PM MDT | Special Weather Statement | SLC | Beaver | 37 min |
| Jul 25, 3:11 PM MDT | Special Weather Statement | SLC | Piute | 34 min |
| Jul 25, 3:18 PM MDT | Special Weather Statement | SLC | Sevier | 27 min |
| Jul 25, 3:33 PM MDT | Special Weather Statement | SLC | Iron | 27 min |
| Jul 25, 3:49 PM MDT | Severe Thunderstorm Warning | SLC | Iron | 26 min |
| Jul 25, 4:11 PM MDT | Flash Flood Warning | SLC | Iron | 3 hr |
| Jul 25, 4:29 PM MDT | Areal Flood Advisory | SLC | Iron | 3 hr |
| Jul 25, 4:41 PM MDT | Special Weather Statement | SLC | Washington | 19 min |
| Jul 25, 4:41 PM MDT | Special Weather Statement | SLC | Iron | 49 min |
| Jul 25, 4:52 PM MDT | Flash Flood Warning | SLC | Iron, Kane, Washington | 4 hr |
| Jul 25, 5:16 PM MDT | Flash Flood Warning | SLC | Washington | 3 hr |
| Jul 25, 5:26 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 19 min |
| Jul 25, 5:42 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 33 min |
| Jul 25, 5:44 PM MDT | Special Weather Statement | SLC | Washington | 31 min |
| Jul 25, 5:52 PM MDT | Special Weather Statement | SLC | Washington | 23 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.