Alert archive / Utah / Flash Flood Warnings in 2017
Flash Flood Warning 44, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Sep 14, 2017, 11:15 AM MDT for Iron 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
- Sep 14, 2017, 11:15 AM MDT (17:15 UTC)
- Expired
- Sep 14, 2017, 2:15 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Iron County, UT
The radar
The Cedar City radar (KICX), 20 km from the middle of the area, began a volume at 17:15 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, 5.3 hours before the alert went out and 288 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
- 105 J/kg
- Mixed-layer CIN
- -259 J/kg
- Mixed-layer LCL
- 2972 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
683
WGUS55 KSLC 141715
FFWSLC
UTC021-142015-
/O.NEW.KSLC.FF.W.0044.170914T1715Z-170914T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
1115 AM MDT THU SEP 14 2017
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
East central Iron County in southern Utah...
* Until 215 PM MDT
* At 1111 AM MDT, Doppler radar indicated brief heavy rainfall has
fallen over the Brian Head Burn Scar. Radar indicates that an
inch has fallen in a short period of time.
* Impacts include debris and flood waters on SR143 and surrounding
secondary roads.
* These storms are fast moving and flash flooding is expected to be
short lived.
* Some locations that will experience flooding include...
Parowan and Brian Head.
If you are traveling through this area...please take steps to ensure
for your safety.
LAT...LON 3775 11276 3769 11280 3769 11288 3784 11286
3785 11281 3781 11273
$$
McInerney1 follow-up statement
394
WGUS75 KSLC 141823
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
1223 PM MDT THU SEP 14 2017
UTC021-142015-
/O.CON.KSLC.FF.W.0044.000000T0000Z-170914T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Iron UT-
1223 PM MDT THU SEP 14 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 PM MDT FOR
EAST CENTRAL IRON COUNTY...
At 1220 PM MDT, The Brian Head Burn Scar has already produced a
debris flow crossing SR 143. Additional heavy rainfall is expected
to move into the area around 1245pm. This excess rainfall will
exacerbate the flooding that is occurring.
Please stay away from this area until flooding has abated.
LAT...LON 3775 11276 3769 11280 3769 11288 3784 11286
3785 11281 3781 11273
$$
McInerney/VerzellaThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 3:21 AM MDT | Flash Flood Watch | SLC | 14 hr | |
| Sep 14, 8:29 AM MDT | Special Weather Statement | SLC | Washington | 46 min |
| Sep 14, 12:21 PM MDT | Special Weather Statement | SLC | Kane | 24 min |
| Sep 14, 12:22 PM MDT | Special Weather Statement | SLC | Kane | 23 min |
| Sep 14, 12:39 PM MDT | Special Weather Statement | SLC | Garfield | 36 min |
| Sep 14, 12:50 PM MDT | Special Weather Statement | SLC | Kane | 25 min |
| Sep 14, 12:51 PM MDT | Flash Flood Warning | SLC | Kane, Washington | 4 hr |
| Sep 14, 1:18 PM MDT | Special Weather Statement | SLC | Garfield | 27 min |
| Sep 14, 1:55 PM MDT | Special Weather Statement | SLC | Kane | 35 min |
| Sep 14, 2:11 PM MDT | Special Weather Statement | SLC | 64 min | |
| Sep 14, 2:15 PM MDT | Flash Flood Warning | SLC | Kane | 8 hr |
| Sep 14, 2:20 PM MDT | Flash Flood Warning | SLC | Garfield, Kane, Wayne | 3 hr |
| Sep 14, 2:39 PM MDT | Special Weather Statement | SLC | Wayne | 66 min |
| Sep 14, 2:52 PM MDT | Severe Thunderstorm Warning | SLC | Emery, Garfield, Wayne | 38 min |
| Sep 14, 3:05 PM MDT | Flash Flood Warning | SLC | Garfield | 3 hr |
Nearby
Flash Flood Warnings in Utah, 2017Every flash flood warning in 2017
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.