Alert archive / Utah / Flash Flood Warnings in 2017
Flash Flood Warning 5, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 12, 2017, 1:19 PM MDT for Garfield County, 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 12, 2017, 1:19 PM MDT (19:19 UTC)
- Expired
- Jul 12, 2017, 4:15 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Garfield County, UT, Iron County, UT
The radar
The Cedar City radar (KICX), 21 km from the middle of the area, began a volume at 19:23 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 7.3 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
- 62 J/kg
- Mixed-layer CIN
- -98 J/kg
- Mixed-layer LCL
- 1512 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
013 WGUS55 KSLC 121919 FFWSLC UTC017-021-122215- /O.NEW.KSLC.FF.W.0005.170712T1919Z-170712T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Salt Lake City UT 119 PM MDT WED JUL 12 2017 The National Weather Service in Salt Lake City has issued a * Flash Flood Warning for... Western Garfield County in southern Utah... East central Iron County in southern Utah... * Until 415 PM MDT * At 116 PM MDT, Doppler radar indicated heavy rain over the Brian Head burn scar. * Excessive rainfall over the Brian Head burn scar is expected to result in debris flows moving through the Clear Water, Mammoth, and Bunker drainages, and other smaller drainages flowing towards Panguitch Lake. The debris flow can consist of rock, mud, vegetation and other loose materials. These debris flows may also impact State Route 143. PRECAUTIONARY/PREPAREDNESS ACTIONS... If a debris flow has occurred it is important to realize that the runout area remains very dangerous. Additional debris flows may occur within minutes of the original flow. Please remain vigilant and be prepared to take swift action. && LAT...LON 3776 11264 3765 11259 3763 11274 3772 11277 $$ ES/MS
2 follow-up statements
886 WGUS75 KSLC 122039 FFSSLC Flash Flood Statement National Weather Service Salt Lake City UT 239 PM MDT WED JUL 12 2017 UTC017-021-122215- /O.CON.KSLC.FF.W.0005.000000T0000Z-170712T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Garfield UT-Iron UT- 239 PM MDT WED JUL 12 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM MDT FOR WESTERN GARFIELD AND EAST CENTRAL IRON COUNTIES... At 237 PM MDT, rain over the Brian Head burn scar has decreased significantly. The flash flood warning remains in effect until 415 pm MDT, as earlier heavy rain over the burn scar could be causing debris flows in the Clear Water, Mammoth, and Bunker drainages, as well as other smaller drainages flowing towards Panguitch Lake. PRECAUTIONARY/PREPAREDNESS ACTIONS... If a debris flow has occurred it is important to realize that the runout area remains very dangerous. Additional debris flows may occur within minutes of the original flow. Please remain vigilant and be prepared to take swift action. && LAT...LON 3776 11264 3765 11259 3763 11274 3772 11277 $$ ES
123 WGUS75 KSLC 122214 FFSSLC Flash Flood Statement National Weather Service Salt Lake City UT 414 PM MDT WED JUL 12 2017 UTC017-021-122223- /O.EXP.KSLC.FF.W.0005.000000T0000Z-170712T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Garfield UT-Iron UT- 414 PM MDT WED JUL 12 2017 ...THE FLASH FLOOD WARNING FOR WESTERN GARFIELD AND EAST CENTRAL IRON COUNTIES WILL EXPIRE AT 415 PM MDT... The heavy rain has ended over the Brian Head burn scar as of 415 pm. Thunderstorms remain active across the area, so please continue to monitor future conditions. LAT...LON 3776 11264 3765 11259 3763 11274 3772 11277 $$ ES
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 7:23 PM MDT | Flash Flood Warning | SLC | Wayne | 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.