Alert archive / Utah / Flash Flood Warnings in 2017
Flash Flood Warning 7, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 18, 2017, 1:59 PM 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
- Jul 18, 2017, 1:59 PM MDT (19:59 UTC)
- Expired
- Jul 18, 2017, 5:00 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), 18 km from the middle of the area, began a volume at 20:00 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, 8.0 hours before the alert went out and 286 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
- 750 J/kg
- Mixed-layer CIN
- -232 J/kg
- Mixed-layer LCL
- 2438 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
547
WGUS55 KSLC 181959
FFWSLC
UTC021-182300-
/O.NEW.KSLC.FF.W.0007.170718T1959Z-170718T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
159 PM MDT TUE JUL 18 2017
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
Brian Head Burn Scar in East central Iron County in southern
Utah...
* Until 500 PM MDT
* At 153 PM MDT, Doppler radar indicated a thunderstorm producing
heavy rain over the Brian Head burn scar just north of the town of
Brian Head. Up to one inch of rain has already fallen with
additional precipitation expected. Flash flooding is
imminent.
* Some locations that will experience flooding include...
State Route 143 north of Brian Head and Parowan.
Excessive rainfall over the Brian Head burn scar will result in
debris flow impacting State Route 143 and potentially the community
of Parowan. The debris flow can consist of rock, mud, vegetation and
other loose materials.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3769 11279 3769 11288 3784 11283 3784 11280
$$
RG1 follow-up statement
524 WGUS75 KSLC 182256 FFSSLC Flash Flood Statement National Weather Service Salt Lake City UT 456 PM MDT TUE JUL 18 2017 UTC021-182303- /O.EXP.KSLC.FF.W.0007.000000T0000Z-170718T2300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Iron UT- 456 PM MDT TUE JUL 18 2017 ...THE FLASH FLOOD WARNING FOR EAST CENTRAL IRON COUNTY WILL EXPIRE AT 500 PM MDT... The intense rainfall that had fallen over the Brian Head Burn Scar produced a small amount of debris over SR 143. Rainfall has since ceased and flash flooding is no longer a threat. LAT...LON 3769 11279 3769 11288 3784 11283 3784 11280 $$ mcinerney
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 6:05 PM MDT | Severe Thunderstorm Warning | SLC | Salt Lake, Tooele | 40 min |
| Jul 17, 7:28 PM MDT | Special Weather Statement | SLC | Rich | 47 min |
| Jul 17, 8:12 PM MDT | Flash Flood Warning | SLC | Iron, Kane, Washington | 6 hr |
| Jul 18, 11:38 AM MDT | Red Flag Warning | SLC | Box Elder, Davis, Salt Lake, Tooele, Utah | 34 hr |
| Jul 18, 3:09 PM MDT | Flash Flood Watch | SLC | 31 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.