Alert archive / Utah / Flash Flood Warnings in 2016

Flash Flood Warning 11, NWS Salt Lake City, UT

August 3, 2016Kane County, Washington County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Aug 3, 2016, 4:14 PM MDT for 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
Aug 3, 2016, 4:14 PM MDT (22:14 UTC)
Expired
Aug 3, 2016, 7:15 PM MDT
In force
3 hr
Issued by
NWS Salt Lake City, UT
Area
Storm-based polygon
Flood severity
None

Counties Kane County, UT, Washington County, UT

The radar

The Cedar City radar (KICX), 40 km from the middle of the area, began a volume at 22:14 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, 10.2 hours before the alert went out and 246 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, Las Vegas, NV at 12:00Z on 2016-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 496 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Las Vegas, NV at 12:00Z on 2016-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 square meters per square second.1939Sfc1 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
496 J/kg
Mixed-layer CIN
-182 J/kg
Mixed-layer LCL
2123 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

848 
WGUS55 KSLC 032216
FFWSLC
UTC025-053-040115-
/O.NEW.KSLC.FF.W.0011.160803T2214Z-160804T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
414 PM MDT WED AUG 3 2016

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN KANE COUNTY IN UTAH...
  EAST CENTRAL WASHINGTON COUNTY IN UTAH...

* UNTIL 715 PM MDT
    
* AT 414 PM MDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN OVER THE NORTH FORK OF THE VIRGIN RIVER IN ZION
  NATIONAL PARK.  

* RADAR RAINFALL ESTIMATES INDICATE THAT NEARLY AN INCH OF
  PRECIPITATION IN A SHORT PERIOD OF TIME HAS FALLEN IN THE
  HEADWATER AREAS OF THE NORTH FORK.  FLASH FLOODING WILL COURSE
  SOUTH UNTIL ATTENUATING INTO THE VIRGIN RIVER NEAR VIRGIN...UTAH.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ZION NATIONAL PARK AND SPRINGDALE. 

LAT...LON 3720 11306 3725 11302 3738 11295 3735 11285
      3716 11300 3716 11302

$$

MCINERNEY
1 follow-up statement
744 
WGUS75 KSLC 032259
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
459 PM MDT WED AUG 3 2016

UTC025-053-040115-
/O.CON.KSLC.FF.W.0011.000000T0000Z-160804T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-WASHINGTON UT-
459 PM MDT WED AUG 3 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM MDT FOR
WESTERN KANE AND EAST CENTRAL WASHINGTON COUNTIES...

AT 454 PM MDT...THE NATIONAL PARK SERVICE REPORTED FLASH FLOODING
ALONG THE NORTH FORK IN THE TEMPLE OF SINAWAVA AREA. THIS FLOODING
WILL LIKELY EXPAND ALONG THE NORTH FORK AND CONTINUE INTO EARLY THIS
EVENING. 


LAT...LON 3720 11306 3725 11302 3738 11295 3735 11285
      3716 11300 3716 11302

$$

MCONGER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 2:40 AM MDTFlash Flood WatchSLC19 hr
Aug 3, 1:55 PM MDTFlash Flood WarningSLCKane6 hr
Aug 3, 2:55 PM MDTFlash Flood WarningSLCKane3 hr
Aug 3, 3:45 PM MDTFlash Flood WarningSLCWashington4 hr
Aug 3, 4:42 PM MDTFlash Flood WarningSLCGarfield, Wayne3 hr

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.