Alert archive / Utah / Flash Flood Warnings in 2017
Flash Flood Warning 41, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 12, 2017, 12:23 PM MDT for Garfield 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
- Aug 12, 2017, 12:23 PM MDT (18:23 UTC)
- Expired
- Aug 12, 2017, 3:15 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Garfield County, UT
The radar
The Cedar City radar (KICX), 39 km from the middle of the area, began a volume at 18:23 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, 6.4 hours before the alert went out and 290 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
- 169 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 1510 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
038
WGUS55 KSLC 121823
FFWSLC
UTC017-122115-
/O.NEW.KSLC.FF.W.0041.170812T1823Z-170812T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
1223 PM MDT SAT AUG 12 2017
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
West central Garfield County in southern Utah...
* Until 315 PM MDT
* At 1220 PM MDT, Doppler radar indicated a line of thunderstorm
producing heavy rain over west central Garfield County. One to two
inches of rain have already fallen in the last hour. Flash
flooding is expected to begin shortly.
* Drainages in this warning include Panguitch Creek, South Canyon,
Pass Creek and associated drainages. SR-143 east of Brian Head to
the junction with SR12 near Panguitch is included in this warning.
* Some locations that will experience flooding include...
Panguitch and Hillsdale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Remain alert for flooding even in locations not receiving rain. Dry
washes, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.
&&
LAT...LON 3784 11239 3768 11236 3768 11264 3776 11263
3785 11251
$$
CRK4 follow-up statements
448
WGUS55 KSLC 121825 CCA
FFWSLC
UTC017-122115-
/O.COR.KSLC.FF.W.0041.170812T1823Z-170812T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
1225 PM MDT SAT AUG 12 2017
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
West central Garfield County in southern Utah...
* Until 315 PM MDT
* At 1223 PM MDT, Doppler radar indicated a line of thunderstorms
producing heavy rain over west central Garfield County. One to two
inches of rain have already fallen in the last hour. Flash
flooding is expected to begin shortly.
* Drainages in this warning include Panguitch Creek, South Canyon,
Pass Creek and associated drainages. SR-143 east of Brian Head to
the junction with SR12 near Panguitch is included in this warning.
* Some locations that will experience flooding include...
Panguitch and Hillsdale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Remain alert for flooding even in locations not receiving rain. Dry
washes, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.
&&
LAT...LON 3784 11239 3768 11236 3768 11264 3776 11263
3785 11251
$$
CRK179
WGUS55 KSLC 121826 CCB
FFWSLC
UTC017-122115-
/O.COR.KSLC.FF.W.0041.170812T1825Z-170812T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
1226 PM MDT SAT AUG 12 2017
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
West central Garfield County in southern Utah...
* Until 315 PM MDT
* At 1225 PM MDT, Doppler radar indicated a line of thunderstorms
producing heavy rain over west central Garfield County. One to two
inches of rain have already fallen in the last hour. Flash
flooding is expected to begin shortly.
* Drainages in this warning include Panguitch Creek, South Canyon,
Pass Creek and associated drainages. SR-143 east of Brian Head to
the junction with US-89 near Panguitch is included in this warning.
* Some locations that will experience flooding include...
Panguitch and Hillsdale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Remain alert for flooding even in locations not receiving rain. Dry
washes, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.
&&
LAT...LON 3784 11239 3768 11236 3768 11264 3776 11263
3785 11251
$$
CRK143
WGUS75 KSLC 122016
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
216 PM MDT SAT AUG 12 2017
UTC017-122115-
/O.CON.KSLC.FF.W.0041.000000T0000Z-170812T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Garfield UT-
216 PM MDT SAT AUG 12 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM MDT FOR
WEST CENTRAL GARFIELD COUNTY...
Radar estimates of 2 to 4 inches of rain in an hour occurred across
portions of west central Garfield County. The heavy rainfall has
ended at this time but flash flooding remains likely.
This warning includes a portion of SR-143 from east of Brian Head to
US-89 near Panguitch as well Panguitch Creek, South Canyon, Pass
Creek and associated drainages.
Some locations that will experience flooding include...
Panguitch and Hillsdale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Remain alert for flooding even in locations not receiving rain. Dry
washes, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.
&&
LAT...LON 3784 11239 3768 11236 3768 11264 3776 11263
3785 11251
$$
CRK038
WGUS75 KSLC 122107
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
307 PM MDT SAT AUG 12 2017
UTC017-122116-
/O.EXP.KSLC.FF.W.0041.000000T0000Z-170812T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Garfield UT-
307 PM MDT SAT AUG 12 2017
...THE FLASH FLOOD WARNING FOR WEST CENTRAL GARFIELD COUNTY WILL
EXPIRE AT 315 PM MDT...
The heavy rain has ended across west central Garfield County.
Enhanced runoff will continue through the afternoon. Use caution in
this area.
LAT...LON 3784 11239 3768 11236 3768 11264 3776 11263
3785 11251
$$
CRKThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 11:49 AM MDT | Flash Flood Warning | SLC | Iron | 3 hr |
| Aug 12, 12:44 PM MDT | Special Weather Statement | SLC | 46 min | |
| Aug 12, 2:47 PM MDT | Fire Weather Watch | SLC | Washington | 24 hr |
| Aug 12, 3:15 PM MDT | Severe Thunderstorm Warning | SLC | Kane, San Juan | 30 min |
| Aug 12, 3:52 PM MDT | Special Weather Statement | SLC | Duchesne | 38 min |
| Aug 12, 3:54 PM MDT | Special Weather Statement | SLC | 51 min | |
| Aug 12, 4:20 PM MDT | Special Weather Statement | SLC | Box Elder | 40 min |
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.