Alert archive / Utah / Flash Flood Warnings in 2017
Flash Flood Warning 34, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 3, 2017, 7:02 PM MDT for Kane County, Washington County, Utah. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 3, 2017, 7:02 PM MDT (01:02 UTC)
- Expired
- Aug 3, 2017, 10:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Kane County, UT, Washington County, UT
The radar
The Cedar City radar (KICX), 37 km from the middle of the area, began a volume at 01:05 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 3, 8:15 PM MDT | FLASH FLOOD | Zion Np, UT | FLOODING REPORTED ACROSS THE LOWER HALF OF THE PARK FROM ROUGHLY CANYON JUNCTION SOUTHWARD INCLUDING PINE CREEK. FLOODING ALSO REPORTED IN THE TOWNS OF SPRINGDALE AND ROCKVILLE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 1.0 hours before the alert went out and 244 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
- 95 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 1515 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
797
WGUS55 KSLC 040102
FFWSLC
UTC025-053-040400-
/O.NEW.KSLC.FF.W.0034.170804T0102Z-170804T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
702 PM MDT THU AUG 3 2017
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
Southeastern Washington County in southwestern Utah...
West central Kane County in southern Utah...
* Until 1000 PM MDT
* At 700 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain moving into Zion National Park. Flash flooding is
expected to begin shortly within the Zion Canyon, as well as areas
along Highway 9 including Pine Creek and Keyhole Canyon.
* Some locations that will experience flooding include...
Zion National Park, Orderville, Springdale, Rockville and Mt
Carmel.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
&&
LAT...LON 3737 11266 3709 11265 3709 11315 3737 11313
$$
MPS2 follow-up statements
568 WGUS75 KSLC 040223 FFSSLC Flash Flood Statement National Weather Service Salt Lake City UT 823 PM MDT THU AUG 3 2017 UTC025-053-040400- /O.CON.KSLC.FF.W.0034.000000T0000Z-170804T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Washington UT-Kane UT- 823 PM MDT THU AUG 3 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM MDT FOR SOUTHEASTERN WASHINGTON AND WEST CENTRAL KANE COUNTIES... At 820 PM MDT, reported heavy rain due to a thunderstorm over !** Zion National Park reported extensive flooding across the southern half of the park from roughly Canyon Junction south and west into the towns of Springville and Rockville. Numerous rockfalls were also reported. Although rain is winding down, residual runoff will continue to result in flash flooding across the area. Some locations that will experience flooding include... Zion National Park, Orderville, Springdale, Rockville and Mt Carmel. PRECAUTIONARY/PREPAREDNESS ACTIONS... Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Campers and hikers should avoid streams or creeks. && LAT...LON 3737 11266 3709 11265 3709 11315 3737 11313 $$ MPS
557 WGUS75 KSLC 040400 FFSSLC Flash Flood Statement National Weather Service Salt Lake City UT 1000 PM MDT THU AUG 3 2017 UTC025-053-040407- /O.EXP.KSLC.FF.W.0034.000000T0000Z-170804T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Washington UT-Kane UT- 1000 PM MDT THU AUG 3 2017 ...THE FLASH FLOOD WARNING FOR SOUTHEASTERN WASHINGTON AND WEST CENTRAL KANE COUNTIES WILL EXPIRE AT 1000 PM MDT... The heavy rain has ended in the Zion National Park area. However, creeks and streams as well as normally dry washes will continue to see high flows through late tonight as flood waters from earlier heavy rain gradually recede. Please continue to heed any remaining road and trail closures. LAT...LON 3737 11266 3709 11265 3709 11315 3737 11313 $$ LC
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 10:01 AM MDT | Flash Flood Watch | SLC | 14 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.