Alert archive / Utah / Flash Flood Warnings in 2018
Flash Flood Warning 13, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 12, 2018, 6:40 PM MDT for Washington 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
- Jul 12, 2018, 6:40 PM MDT (00:40 UTC)
- Expired
- Jul 12, 2018, 9:30 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Washington County, UT
The radar
The Cedar City radar (KICX), 56 km from the middle of the area, began a volume at 00:42 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 00:00Z, 0.7 hours before the alert went out and 217 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
- 790 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 1866 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
729
WGUS55 KSLC 130040
FFWSLC
UTC053-130330-
/O.NEW.KSLC.FF.W.0013.180713T0040Z-180713T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
640 PM MDT THU JUL 12 2018
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
Central Washington County in southwestern Utah...
* Until 930 PM MDT
* At 635 PM MDT, Doppler radar indicated a thunderstorm producing
heavy rain over over the Santa Clara River, Brush Creek, Ash
Creek, and Leap Creek.
* Current radar rainfall estimates indicate over 2.5 inches of rain
has fallen in some areas.
* If you are traveling through the area please take measures to
ensure your safety now.
* Some locations that will experience flooding include...
La Verkin, Toquerville, Leeds, Pine Valley and Pintura.
LAT...LON 3745 11322 3722 11327 3732 11350 3739 11376
3746 11370
$$
McInerney/Bonnette1 follow-up statement
880
WGUS75 KSLC 130322
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
922 PM MDT THU JUL 12 2018
UTC053-130330-
/O.EXP.KSLC.FF.W.0013.000000T0000Z-180713T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Washington UT-
922 PM MDT THU JUL 12 2018
...THE FLASH FLOOD WARNING FOR CENTRAL WASHINGTON COUNTY WILL EXPIRE
AT 930 PM MDT...
The heavy rain has ended across central Washington County, with
light rain expected to gradually taper off late this evening. Flood
waters will recede through the night. Please continue to heed any
remaining road closures.
LAT...LON 3745 11322 3722 11327 3732 11350 3739 11376
3746 11370
$$
LCThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 6:23 PM MDT | Flash Flood Warning | SLC | Washington | 3 hr |
| Jul 13, 5:14 PM MDT | Flash Flood Warning | SLC | Iron | 3 hr |
| Jul 13, 5:41 PM MDT | Flash Flood Warning | SLC | Garfield, Kane, San Juan | 5 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.