Alert archive / Utah / Flash Flood Warnings in 2017
Flash Flood Warning 4, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 11, 2017, 7:23 PM MDT for Wayne 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
- Jul 11, 2017, 7:23 PM MDT (01:23 UTC)
- Expired
- Jul 11, 2017, 10:15 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Wayne County, UT
The radar
The Cedar City radar (KICX), 170 km from the middle of the area, began a volume at 01:25 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 |
|---|---|---|---|
| Jul 11, 8:00 PM MDT | FLASH FLOOD | Capitol Reef Np, UT | FLASH FLOOD IMPACTING COHAB CANYON, SULPHUR CREEK, AND GRAND WASH. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Grand Junction, CO (KGJT), launched 00:00Z, 1.4 hours before the alert went out and 248 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
- 256 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 2818 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
330
WGUS55 KSLC 120123
FFWSLC
UTC055-120415-
/O.NEW.KSLC.FF.W.0004.170712T0123Z-170712T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
723 PM MDT TUE JUL 11 2017
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
Western Wayne County in southern Utah...
* Until 1015 PM MDT
* At 717 PM MDT, Doppler radar indicated a thunderstorm producing
heavy rain over and around Capitol Reef National Park. Flash
flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Fruita, Caineville, and Capitol Reef National Park...
specifically Sulphur Creek, Grand Wash, and Cathedral Valley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 3849 11118 3838 11101 3822 11102 3823 11141
3850 11141
$$
LC2 follow-up statements
245
WGUS75 KSLC 120251
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
851 PM MDT TUE JUL 11 2017
UTC055-120415-
/O.CON.KSLC.FF.W.0004.000000T0000Z-170712T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne UT-
851 PM MDT TUE JUL 11 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM MDT FOR
WESTERN WAYNE COUNTY...
At 848 PM MDT, Doppler radar indicated up to one inch of rain has
already fallen over and near Capitol Reef National Park. This is
likely resulting in flash flooding.
Some locations that will experience flooding include...
Fruita, Caineville, and Capitol Reef National Park...
specifically Sulphur Creek, Grand Wash, and Cathedral Valley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
&&
LAT...LON 3849 11118 3838 11101 3822 11102 3823 11141
3850 11141
$$
LC545
WGUS75 KSLC 120409
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
1009 PM MDT TUE JUL 11 2017
UTC055-120417-
/O.EXP.KSLC.FF.W.0004.000000T0000Z-170712T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne UT-
1009 PM MDT TUE JUL 11 2017
...THE FLASH FLOOD WARNING FOR WESTERN WAYNE COUNTY WILL EXPIRE AT
1015 PM MDT...
Heavy rain has ended over and near Capitol Reef National Park.
Runoff from earlier heavy rain will gradually recede through late
tonight. Please continue to heed any remaining road closures.
LAT...LON 3849 11118 3838 11101 3822 11102 3823 11141
3850 11141
$$
LCThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 1:19 PM MDT | Flash Flood Warning | SLC | Garfield, Iron | 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.