Alert archive / Utah / Flash Flood Warnings in 2014

Flash Flood Warning 49, NWS Salt Lake City, UT

September 20, 2014Kane County, Washington County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Sep 20, 2014, 2:16 PM MDT for Kane County, Washington County, Utah. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Sep 20, 2014, 2:16 PM MDT (20:16 UTC)
Expired
Sep 20, 2014, 5:15 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), 31 km from the middle of the area, began a volume at 20:15 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.

What was reported inside it

TimeReportWhereRemark
Sep 20, 3:00 PM MDTFLASH FLOODZion Np, UTFLASH FLOODING REPORTED IN ECHO CANYON

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Las Vegas, NV (KVEF), launched 12:00Z, 8.3 hours before the alert went out and 251 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 2014-09-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2014-09-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3119 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
83 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

096 
WGUS55 KSLC 202016
FFWSLC
UTC025-053-202315-
/O.NEW.KSLC.FF.W.0049.140920T2016Z-140920T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
216 PM MDT SAT SEP 20 2014

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

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

* UNTIL 515 PM MDT
    
* AT 213 PM MDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN OVER SOUTHERN ZION NATIONAL PARK. NARROW SLOT CANYONS 
  THROUGHOUT THE SOUTHERN HALF OF THE PARK WILL EXPERIENCE FLOODING 
  FROM THESE THUNDERSTORMS.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

&&

LAT...LON 3746 11284 3713 11278 3713 11318 3745 11323

$$

CONGER
2 follow-up statements
848 
WGUS75 KSLC 202131
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
331 PM MDT SAT SEP 20 2014

UTC025-053-202315-
/O.CON.KSLC.FF.W.0049.000000T0000Z-140920T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-KANE UT-
331 PM MDT SAT SEP 20 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MDT FOR
SOUTHEASTERN WASHINGTON AND WEST CENTRAL KANE COUNTIES...

AT 326 PM MDT...DOPPLER RADAR INDICATED THUNDERSTORMS EXITING ZION 
NATIONAL PARK FROM SOUTH TO NORTH. WHILE RAIN MAY BE ENDING FOR THE 
TIME BEING...IT WILL CONTINUE TO TAKE SOME TIME FOR THE WATERS TO 
RECEDE. CONTINUE TO EXERCISE CAUTION NEAR ANY SLOT CANYONS AND 
NORMALLY DRY WASHES. ADDITIONAL RAIN IS EXPECTED THIS EVENING.

SOME LOCATIONS THAT MAY EXPERIENCE FLOODING INCLUDE... 
ZION NATIONAL PARK...VIRGIN...SPRINGDALE AND ROCKFALL. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW.

&&

LAT...LON 3746 11284 3713 11278 3713 11318 3745 11323

$$

ROGOWSKI
108 
WGUS75 KSLC 202307
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
507 PM MDT SAT SEP 20 2014

UTC025-053-202316-
/O.EXP.KSLC.FF.W.0049.000000T0000Z-140920T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-KANE UT-
507 PM MDT SAT SEP 20 2014

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN WASHINGTON AND WEST
CENTRAL KANE COUNTIES WILL EXPIRE AT 515 PM MDT...

RUNOFF FROM EARLIER PRECIPITATION HAS DIMINISHED GREATLY AND RIVER 
AND STREAM LEVELS HAVE DECREASED. THEREFORE...THE FLASH FLOOD 
WARNING HAS BEEN ALLOWED TO EXPIRE. MONITOR NOAA WEATHER RADIO OR 
LOCAL TELEVISION OR RADIO FOR THE LATEST WEATHER INFORMATION.

LAT...LON 3746 11284 3713 11278 3713 11318 3745 11323

$$

MPS

Nearby

Flash Flood Warnings in Utah, 2014Every flash flood warning in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.