Alert archive / Utah / Flash Flood Warnings in 2016

Flash Flood Warning 31, NWS Salt Lake City, UT

September 22, 2016Iron County, Kane County, Washington County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Sep 22, 2016, 5:51 PM MDT for Iron County, Kane County, Washington 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: Sep 22, 2016, 5:51 PM MDT (23:51 UTC)
Expired: Sep 22, 2016, 8:45 PM MDT
In force: 3 hr
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon
Flood severity: None

Counties Iron County, UT, Kane County, UT, Washington County, UT

The radar

The Cedar City radar (KICX), 30 km from the middle of the area, began a volume at 23:55 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

Las Vegas, NV (KVEF), launched 12:00Z, 11.9 hours before the alert went out and 249 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2131 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

111 
WGUS55 KSLC 222351
FFWSLC
UTC021-025-053-230245-
/O.NEW.KSLC.FF.W.0031.160922T2351Z-160923T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
551 PM MDT THU SEP 22 2016

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL KANE COUNTY IN UTAH...
  SOUTHEASTERN IRON COUNTY IN UTAH...
  NORTHEASTERN WASHINGTON COUNTY IN UTAH...

* UNTIL 845 PM MDT
    
* AT 550 PM MDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN OVER ZION NATIONAL PARK.  THIS INCLUDES THE KOLOB
  SECTION OF THE PARK ALONG WITH THE MAIN SECTION OF THE PARK.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LA VERKIN...ZION NATIONAL PARK...TOQUERVILLE...VIRGIN...
  SPRINGDALE...ROCKVILLE AND KOLOB CANYON.

* IF YOU ARE IN THIS AREA...PLEASE USE PRUDENT JUDGEMENT WHEN
  TRAVELING THROUGH THE PARK.

LAT...LON 3748 11286 3713 11284 3719 11327 3750 11326

$$

MCINERNEY

1 follow-up statement

301 
WGUS75 KSLC 230055
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
655 PM MDT THU SEP 22 2016

UTC021-025-053-230245-
/O.CON.KSLC.FF.W.0031.000000T0000Z-160923T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-IRON UT-WASHINGTON UT-
655 PM MDT THU SEP 22 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM MDT FOR
WEST CENTRAL KANE...SOUTHEASTERN IRON AND NORTHEASTERN WASHINGTON
COUNTIES...

AT 649 PM MDT...FLASH FLOODING IS OCCURRING IN ZION NATIONAL PARK.
MANY CANYONS AND SLOTS ARE FLASHING...IN ADDITION TO LARGE
WATERFALLS.  ZION HAS HAD FLASH FLOODING OFF AND ON ALL DAY
AS THE HYDROLOGIC SYSTEM IS SATURATED. 

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
LA VERKIN...ZION NATIONAL PARK...TOQUERVILLE...VIRGIN...SPRINGDALE...
ROCKVILLE AND KOLOB CANYON.

IF YOU ARE TRAVELING THROUGH THE PARK PLEASE BE AWARE OF ROAD DEBRIS
OR FLOOD WATERS COURSING THROUGH THE AREA.  PLEASE BE VIGILANT
DURING THE NIGHTTIME HOURS.

LAT...LON 3748 11286 3713 11284 3719 11327 3750 11326

$$

MCINERNEY

The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 21, 7:08 PM MDT	Special Weather Statement	SLC	Davis	52 min
Sep 21, 7:54 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder	51 min
Sep 21, 8:30 PM MDT	Special Weather Statement	SLC	Cache	45 min
Sep 21, 8:55 PM MDT	Special Weather Statement	SLC	Cache	50 min
Sep 21, 9:28 PM MDT	Special Weather Statement	SLC	Rich	62 min
Sep 22, 3:08 AM MDT	Wind Advisory	SLC		19 hr
Sep 22, 7:38 AM MDT	Areal Flood Warning	SLC	Kane, Washington	6 hr
Sep 22, 7:49 AM MDT	Flash Flood Warning	SLC	Washington	3 hr
Sep 22, 9:34 AM MDT	Areal Flood Warning	SLC	Carbon, Emery, Sevier	6 hr
Sep 22, 9:58 AM MDT	Flash Flood Warning	SLC	Garfield, Wayne	6 hr
Sep 22, 10:24 AM MDT	Areal Flood Warning	SLC	Carbon, Duchesne, Emery, Garfield, Iron, Kane and 6 more	12 hr
Sep 22, 11:30 AM MDT	Areal Flood Warning	SLC	Carbon, Duchesne, Emery, Summit, Utah, Wasatch and 1 more	10 hr
Sep 22, 1:06 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder, Tooele	24 min
Sep 22, 1:27 PM MDT	Special Weather Statement	SLC	Tooele	48 min
Sep 22, 2:09 PM MDT	Severe Thunderstorm Warning	SLC	Tooele	36 min
Sep 22, 2:15 PM MDT	Special Weather Statement	SLC	Box Elder	30 min
Sep 22, 2:18 PM MDT	Winter Weather Advisory	SLC		44 hr
Sep 22, 2:44 PM MDT	Severe Thunderstorm Warning	SLC	Davis, Tooele	31 min
Sep 22, 3:08 PM MDT	Special Weather Statement	SLC	Davis	22 min
Sep 22, 3:25 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder, Davis, Weber	35 min
Sep 22, 3:54 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder, Cache, Davis, Weber	36 min
Sep 22, 3:58 PM MDT	Special Weather Statement	SLC	Salt Lake	47 min
Sep 22, 4:22 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder, Cache, Rich	38 min
Sep 22, 4:51 PM MDT	Areal Flood Advisory	SLC	Washington	54 min

Nearby

Flash Flood Warnings in Utah, 2016 Every flash flood warning in 2016

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.