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 20, 2021, 2:21 PM MDT for Iron County, Utah. It was in force for 39 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 20, 2021, 2:21 PM MDT (20:21 UTC)
- Expired
- Jul 20, 2021, 3:00 PM MDT
- In force
- 39 min
- Issued by
- NWS Salt Lake City, UT
County Iron County, UT
The radar
The Cedar City radar (KICX), 38 km from the middle of the area, began a volume at 20:24 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, 8.4 hours before the alert went out and 238 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
- 33 J/kg
- Mixed-layer CIN
- -208 J/kg
- Mixed-layer LCL
- 2439 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -26 m²/s²
- 0-3 km storm-relative helicity
- -8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
656 WWUS85 KSLC 202021 SPSSLC Special Weather Statement National Weather Service Salt Lake City UT 221 PM MDT Tue Jul 20 2021 UTZ122-125-202100- Southwest Utah UT-Southern Mountains UT- 221 PM MDT Tue Jul 20 2021 ...STRONG THUNDERSTORM MAY PRODUCE HEAVY RAINFALL AND HAIL OVER THE CITY OF NEW HARMONY AND ADDITIONAL PORTIONS OF NORTH CENTRAL WASHINGTON AND SOUTH CENTRAL IRON COUNTIES UNTIL 300 PM MDT... At 218 PM MDT, National Weather Service Doppler radar indicated a strong thunderstorm over New Harmony, or 18 miles southwest of Cedar City...moving northeast at 10 mph. Half inch hail will be possible. Locations impacted include... New Harmony and Kanarraville. This includes the following highways... Interstate 15 between mile markers 44 and 51. Utah Route 56 between mile markers 44 and 52. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heavy rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3744 11331 3753 11343 3771 11327 3757 11311 TIME...MOT...LOC 2018Z 228DEG 8KT 3751 11333 $$ ND
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 6:01 PM MDT | Special Weather Statement | SLC | Tooele | 59 min |
| Jul 19, 6:10 PM MDT | Special Weather Statement | SLC | Juab | 65 min |
| Jul 19, 6:13 PM MDT | Special Weather Statement | SLC | Washington | 47 min |
| Jul 19, 8:19 PM MDT | Flash Flood Warning | SLC | Kane | 86 min |
| Jul 20, 12:11 PM MDT | Flash Flood Warning | SLC | Wayne | 3 hr |
| Jul 20, 1:18 PM MDT | Flash Flood Warning | SLC | Iron, Washington | 4 hr |
| Jul 20, 3:26 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 6 hr |
| Jul 20, 3:41 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 3 hr |
| Jul 20, 4:03 PM MDT | Special Weather Statement | SLC | Sevier | 27 min |
| Jul 20, 4:58 PM MDT | Flash Flood Warning | SLC | Garfield | 3 hr |
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.