Alert archive / Utah / Flash Flood Warnings in 2016

Flash Flood Warning 20, NWS Salt Lake City, UT

August 23, 2016Kane County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Aug 23, 2016, 4:03 PM MDT for Kane 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 23, 2016, 4:03 PM MDT (22:03 UTC)
Expired
Aug 23, 2016, 7:00 PM MDT
In force
3 hr
Issued by
NWS Salt Lake City, UT
Area
Storm-based polygon
Flood severity
None

County Kane County, UT

The radar

The Cedar City radar (KICX), 85 km from the middle of the area, began a volume at 22:04 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, 10.1 hours before the alert went out and 220 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-pSkew-T log-p diagram, Flgstf/Belemont, AZ at 12:00Z on 2016-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 11 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 12:00Z on 2016-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
11 J/kg
Mixed-layer CIN
-112 J/kg
Mixed-layer LCL
1169 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

611 
WGUS55 KSLC 232207
FFWSLC
UTC025-240100-
/O.NEW.KSLC.FF.W.0020.160823T2203Z-160824T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
403 PM MDT TUE AUG 23 2016

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL KANE COUNTY IN UTAH...

* UNTIL 700 PM MDT
    
* AT 403 PM MDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN OVER THE LOWER PARIA RIVER DRAINAGE.  THIS ALSO
  INCLUDES THE BUCKSKIN WASH.  BOTH DRAINAGES ARE LOCATED IN THE
  GRAND STAIRCASE ESCALANTE NATIONAL MONUMENT. FLASH FLOODING IS
  EXPECTED SHORTLY. 

* OVER AN INCH OF PRECIPITATION HAS FALLEN IN AROUND A 30 MINUTE
  WINDOW IN THESE DRAINAGES.  ADDITIONAL RAINFALL IS OCCURRING AND
  MOVING DOWN DRAINAGE.

* FLASH FLOODING WILL REMAIN OVER SOUTH CENTRAL KANE COUNTY.

* IF YOU ARE TRAVELING IN AND AROUND THESE WASHES...PLEASE REMAIN
  VIGILANT TO SUDDEN FLASH FLOODING THROUGH THESE AREAS.

LAT...LON 3732 11220 3734 11185 3700 11178 3700 11213

$$

MCINERNEY
2 follow-up statements
542 
WGUS75 KSLC 240008
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
604 PM MDT TUE AUG 23 2016

UTC025-240100-
/O.CON.KSLC.FF.W.0020.000000T0000Z-160824T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-
604 PM MDT TUE AUG 23 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM MDT FOR
SOUTH CENTRAL KANE COUNTY...

AT 604 PM MDT...FLASH FLOODING IS OCCURRING ON THE BUCKSKIN WASH
AREA OF THE GRAND STAIRCASE ESCALANTE NATIONAL MONUMENT. THE
BUCKSKIN WASH IS A VERY NARROW AND POPULAR SLOT CANYON THAT DRAINS
INTO THE PARIA RIVER DRAINAGE AS IT CROSSES INTO ARIZONA.

FLASH FLOODING IS ALSO ANTICIPATED ALONG THE PARIA RIVER UPSTREAM
ABOUT 15 MILES.  ALL OF THE FLOOD WATERS WILL FLOW INTO THE EVENING
AND NIGHTTIME HOURS AND EVENTUALLY TERMINATE INTO THE COLORADO RIVER.

LIGHT RAINFALL IS OCCURRING OVER THE DRAINAGE AND MAY CONTINUE
THROUGH THE NIGHTTIME HOURS.  PLEASE AVOID THESE DRAINAGES THROUGH
THIS TIME FRAME.

LAT...LON 3732 11220 3734 11185 3700 11178 3700 11213

$$

MCINERNEY
967 
WGUS75 KSLC 240054
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
650 PM MDT TUE AUG 23 2016

UTC025-240100-
/O.EXP.KSLC.FF.W.0020.000000T0000Z-160824T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-
650 PM MDT TUE AUG 23 2016

...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL KANE COUNTY WILL EXPIRE
AT 700 PM MDT...

THE FLASH FLOODING IN THE BUCKSKIN AND PARIA DRAINAGE CONTINUES TO
FLOW AT DANGEROUS LEVELS.  AS SUCH AN ADDITIONAL WARNING WILL BE
ISSUED TO ADDRESS THE RESIDUAL FLOODING THROUGH ROUGHLY 9PM.

 
LAT...LON 3732 11220 3734 11185 3700 11178 3700 11213

$$

MCINERNEY

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 5:14 PM MDTSevere Thunderstorm WarningSLCIron, Washington31 min
Aug 23, 5:44 PM MDTSpecial Weather StatementSLCWashington31 min

Nearby

Flash Flood Warnings in Utah, 2016Every 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.