Alert archive / Utah / Flash Flood Warnings in 2017
Flash Flood Warning 29, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 28, 2017, 2:58 PM MDT for Garfield County, Kane County, San Juan County, Utah. It was in force for 4 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 28, 2017, 2:58 PM MDT (20:58 UTC)
- Expired
- Jul 28, 2017, 7:00 PM MDT
- In force
- 4 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Garfield County, UT, Kane County, UT, San Juan County, UT
The radar
The Cedar City radar (KICX), 151 km from the middle of the area, began a volume at 21:01 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, 9.0 hours before the alert went out and 270 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
- 43 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 1558 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
117
WGUS55 KSLC 282058
FFWSLC
UTC017-025-037-290100-
/O.NEW.KSLC.FF.W.0029.170728T2058Z-170729T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
258 PM MDT FRI JUL 28 2017
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
South central Garfield County in southern Utah...
Southwestern San Juan County in southeastern Utah...
Eastern Kane County in southern Utah...
* Until 700 PM MDT
* At 254 PM MDT, Doppler radar indicated a thunderstorm producing
heavy rain over the lower Escalante River Drainage. This area
includes Coyote Gulch, Croton, Last Chance, and others in the
area. Additionally, the warning includes the Southern end of
Capitol Reef National Park.
* Radar rainfall estimates of over an inch have been recorded and
thunderstorm activity continues to propagate down drainage towards
Lake Powell.
* If you are in the vicinity of the lower Escalante River Drainage
and Lower Capitol Reef National Park, please take precautions to
ensure for your safety.
LAT...LON 3786 11083 3763 11057 3736 11070 3707 11101
3700 11154 3753 11186 3762 11130 3766 11119
3775 11131 3787 11151 3800 11114
$$
MCINERNEY2 follow-up statements
908
WGUS75 KSLC 282243
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
443 PM MDT FRI JUL 28 2017
UTC017-025-037-290100-
/O.CON.KSLC.FF.W.0029.000000T0000Z-170729T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Garfield UT-San Juan UT-Kane UT-
443 PM MDT FRI JUL 28 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM MDT FOR
SOUTH CENTRAL GARFIELD...SOUTHWESTERN SAN JUAN AND EASTERN KANE
COUNTIES...
At 438 PM MDT, Rainfall continues across the southern border of the
flash flood warning. However, the majority of the precipitation has
moved out of the area. Radar rainfall estimates across the majority
of this are includes around an inch, with selected areas of 2+
inches of precipitation.
This area is highly flash flood prone, and is traveled by hikers,
canyoneers, and campers in the Coyote Gulch area and other slot
canyons along the Hole In The Rock Road.
Flash flooding is expected to continue until the evening hours.
Depending on further thunderstorm development, flooding may continue
into the night time hours.
Please use prudent judgement when traveling through this area until
the morning hours of Saturday.
LAT...LON 3786 11083 3763 11057 3736 11070 3707 11101
3700 11154 3753 11186 3762 11130 3766 11119
3775 11131 3787 11151 3800 11114
$$
MCINERNEY437
WGUS75 KSLC 290054
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
654 PM MDT FRI JUL 28 2017
UTC017-025-037-290100-
/O.EXP.KSLC.FF.W.0029.000000T0000Z-170729T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Garfield UT-San Juan UT-Kane UT-
654 PM MDT FRI JUL 28 2017
...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL GARFIELD...SOUTHWESTERN
SAN JUAN AND EASTERN KANE COUNTIES WILL EXPIRE AT 700 PM MDT...
Flash flooding in the lower Escalante Drainage is no longer a
threat. The combination of lower rainfall amounts, and attenuating
floods has reduced high water in the area.
However, spotty storms continue to reform to the west and it's
possible this area may see additional storms throughout the evening
and night time hours. Please be aware of any further thunderstorm
development. if you notice these storms upstream, move to higher
ground.
LAT...LON 3786 11083 3763 11057 3736 11070 3707 11101
3700 11154 3753 11186 3762 11130 3766 11119
3775 11131 3787 11151 3800 11114
$$
MCINERNEYThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 8:04 PM MDT | Flash Flood Warning | SLC | Kane | 4 hr |
| Jul 27, 9:24 PM MDT | Flash Flood Warning | SLC | Kane | 4 hr |
| Jul 28, 1:03 PM MDT | Special Weather Statement | SLC | Garfield | 27 min |
| Jul 28, 1:15 PM MDT | Special Weather Statement | SLC | Garfield | 30 min |
| Jul 28, 1:32 PM MDT | Special Weather Statement | SLC | Kane | 43 min |
| Jul 28, 1:38 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 3 hr |
| Jul 28, 1:46 PM MDT | Flash Flood Warning | SLC | Garfield | 5 hr |
| Jul 28, 2:05 PM MDT | Special Weather Statement | SLC | Kane | 25 min |
| Jul 28, 2:39 PM MDT | Flash Flood Warning | SLC | Garfield | 3 hr |
| Jul 28, 3:45 PM MDT | Special Weather Statement | SLC | Garfield | 30 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.