Alert archive / Utah / Flash Flood Warnings in 2018
Flash Flood Warning 64, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 22, 2018, 6:02 PM MDT for Summit County, Utah. It was in force for 3 hr. 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, 2018, 6:02 PM MDT (00:02 UTC)
- Expired
- Aug 22, 2018, 9:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Summit County, UT
The radar
The Salt Lake City radar (KMTX), 98 km from the middle of the area, began a volume at 00:04 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, 0.0 hours before the alert went out and 36 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
- 21 J/kg
- Mixed-layer CIN
- -276 J/kg
- Mixed-layer LCL
- 2003 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 131 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
615
WGUS55 KSLC 230002
FFWSLC
UTC043-230300-
/O.NEW.KSLC.FF.W.0064.180823T0002Z-180823T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
602 PM MDT WED AUG 22 2018
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
Western Summit County in northern Utah...
* Until 900 PM MDT
* At 553 PM MDT, Doppler radar indicated a thunderstorm producing
heavy rain over the Tollgate Burn Scar. Debris from this scar has
the potential to flow onto I-80 between the junction of I- 80 and
Wanship.
* Radar rainfall estimates of a half inch in about 20 minutes are
expected over the scar.
* If you plan on driving through I-80 from Park City to Wanship
please be aware of the potential for debris on the west bound
lanes.
LAT...LON 4080 11146 4077 11145 4077 11148 4078 11149
$$
McInerney1 follow-up statement
840 WGUS75 KSLC 230251 FFSSLC Flash Flood Statement National Weather Service Salt Lake City UT 851 PM MDT WED AUG 22 2018 UTC043-230300- /O.EXP.KSLC.FF.W.0064.000000T0000Z-180823T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Summit UT- 851 PM MDT WED AUG 22 2018 ...THE FLASH FLOOD WARNING FOR WESTERN SUMMIT COUNTY WILL EXPIRE AT 900 PM MDT... Rainfall over the Tollgate Burn Scar has ceased. As such, the threat of a debris flow has passed. LAT...LON 4080 11146 4077 11145 4077 11148 4078 11149 $$ McInerney
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 6:00 PM MDT | Special Weather Statement | SLC | Summit | 45 min |
| Aug 22, 6:27 PM MDT | Special Weather Statement | SLC | Salt Lake | 33 min |
| Aug 22, 6:39 PM MDT | Severe Thunderstorm Warning | SLC | Utah | 36 min |
| Aug 22, 6:41 PM MDT | Special Weather Statement | SLC | Salt Lake | 34 min |
| Aug 22, 7:06 PM MDT | Special Weather Statement | SLC | Utah | 24 min |
| Aug 22, 7:14 PM MDT | Special Weather Statement | SLC | Wasatch | 31 min |
| Aug 22, 7:30 PM MDT | Special Weather Statement | SLC | Utah | 30 min |
| Aug 22, 8:11 PM MDT | Flash Flood Warning | SLC | Duchesne, Wasatch | 3 hr |
| Aug 22, 9:09 PM MDT | Flash Flood Warning | SLC | Utah, Wasatch | 3 hr |
| Aug 22, 11:02 PM MDT | Flash Flood Warning | SLC | Duchesne, Wasatch | 4 hr |
| Aug 22, 11:38 PM MDT | Special Weather Statement | SLC | Carbon | 52 min |
| Aug 23, 12:00 AM MDT | Special Weather Statement | SLC | Sanpete | 45 min |
| Aug 23, 12:08 AM MDT | Severe Thunderstorm Warning | SLC | Juab, Sanpete, Utah | 45 min |
| Aug 23, 1:00 PM MDT | Special Weather Statement | SLC | Kane | 30 min |
| Aug 23, 1:13 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 3 hr |
Nearby
Flash Flood Warnings in Utah, 2018Every flash flood warning in 2018
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.