Alert archive / Utah / Flash Flood Warnings in 2016

Flash Flood Warning 26, NWS Salt Lake City, UT

September 3, 2016Kane County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Sep 3, 2016, 10:53 AM 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
Sep 3, 2016, 10:53 AM MDT (16:53 UTC)
Expired
Sep 3, 2016, 1:45 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), 97 km from the middle of the area, began a volume at 16:56 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, 4.9 hours before the alert went out and 211 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 2016-09-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 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 2016-09-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 square meters per square second.19395878Sfc1 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
35 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
1401 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted.

576 
WGUS55 KSLC 031653
FFWSLC
UTC025-031945-
/O.NEW.KSLC.FF.W.0026.160903T1653Z-160903T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1053 AM MDT SAT SEP 3 2016

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

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

* UNTIL 145 PM MDT
    
* AT 1051 AM MDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN OVER THE HOUSEROCK VALLEY AND BUCKSKIN WASH. FLASH
  FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BUCKSKIN GULCH...THE HOUSEROCK VALLEY ROAD...
  AND OTHER NORMALLY DRY WASHES IN THE AREA.

LAT...LON 3719 11209 3724 11177 3700 11163 3700 11209

$$

GM
1 follow-up statement
978 
WGUS75 KSLC 031833
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1233 PM MDT SAT SEP 3 2016

UTC025-031945-
/O.CON.KSLC.FF.W.0026.000000T0000Z-160903T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-
1233 PM MDT SAT SEP 3 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 145 PM MDT FOR
SOUTH CENTRAL KANE COUNTY...

AT 1229 PM MDT...STRONG THUNDERSTORMS THAT MOVED ACROSS THE
HOUSEROCK ROAD AND BUCKSKIN GULCH EARLIER PRODUCED UP TO ONE HALF
INCH OF RAINFALL IN A VERY BRIEF PERIOD. FLASH FLOODING IS EXPECTED
TO BE OCCURRING ACROSS THIS AREA.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BUCKSKIN GULCH...THE HOUSEROCK VALLEY ROAD...
  AND OTHER NORMALLY DRY WASHES IN THE AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3719 11209 3724 11177 3700 11163 3700 11209

$$

GM

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 6:01 PM MDTFlash Flood WarningSLCKane3 hr
Sep 2, 6:45 PM MDTSpecial Weather StatementSLCCarbon45 min
Sep 2, 7:38 PM MDTSpecial Weather StatementSLCSevier52 min
Sep 3, 1:43 PM MDTFlash Flood WarningSLCKane3 hr
Sep 3, 4:16 PM MDTSevere Thunderstorm WarningSLCGarfield29 min
Sep 3, 4:44 PM MDTSpecial Weather StatementSLCWayne31 min
Sep 3, 5:35 PM MDTSevere Thunderstorm WarningSLCCarbon, Duchesne25 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.