Alert archive / Utah / Flash Flood Warnings in 2014

Flash Flood Warning 39, NWS Salt Lake City, UT

August 26, 2014Kane County, Washington County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Aug 26, 2014, 9:49 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 26, 2014, 9:49 PM MDT (03:49 UTC)
Expired: Aug 27, 2014, 12:45 AM 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), 34 km from the middle of the area, began a volume at 03:52 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 00:00Z, 3.8 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: 4396 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 4 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.

544 
WGUS55 KSLC 270349
FFWSLC
UTC025-053-270645-
/O.NEW.KSLC.FF.W.0039.140827T0349Z-140827T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
949 PM MDT TUE AUG 26 2014

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

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

* UNTIL 1245 AM MDT
    
* AT 945 PM MDT...FLASH FLOODING CONTINUES IN ZION NATIONAL PARK. 
  THE NORTH FORK OF THE VIRGIN RIVER IS ON THE DECLINE...FLOWING AT 
  1259 CUBIC FEET PER SECOND (CFS). NORMAL FLOW FOR THIS RIVER ON 
  THIS DATE IS AROUND 40 CFS. 

* THUNDERSTORM ACTIVITY CONTINUES TO MOVE THROUGH THE PARK AND FLASH 
  FLOODING OF SMALL STREAMS AND SLOTS CONTINUE TO FLOW.  IT IS 
  ANTICIPATED WITH THE AMOUNT OF WATER COURSING THROUGH THE 
  HYDROLOGIC SYSTEM AND THE ADDITIONAL THUNDERSTORMS...ZION WILL 
  CONTINUE TO FLOOD THROUGH THE NIGHTTIME HOURS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN OR NEAR ANY OF THE WATERWAYS IN THIS AREA BEWARE OF 
RAPIDLY RISING WATER.  THE NORTH AND EAST FORKS OF THE VIRGIN AND 
THEIR TRIBUTARIES ARE VERY DANGEROUS AT THIS TIME. 

&&

LAT...LON 3742 11291 3736 11285 3718 11289 3716 11304
      3720 11318 3741 11321

$$

MCINERNEY

2 follow-up statements

259 
WGUS75 KSLC 270512
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1112 PM MDT TUE AUG 26 2014

UTC025-053-270645-
/O.CON.KSLC.FF.W.0039.000000T0000Z-140827T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-KANE UT-
1112 PM MDT TUE AUG 26 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 AM MDT FOR
EAST CENTRAL WASHINGTON AND WEST CENTRAL KANE COUNTIES...

AT 1111 PM MDT...LIGHT TO MODERATE RAIN CONTINUES ACROSS PORTIONS OF 
ZION NATIONAL PARK. PARK OFFICIALS INDICATE RUNOFF CONTINUES ACROSS 
THE PARK THEREFORE FLASH FLOODING WILL CONTINUE TO BE A THREAT FOR 
THE NEXT FEW HOURS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3742 11291 3736 11285 3718 11289 3716 11304
      3720 11318 3741 11321

$$

CRK

774 
WGUS75 KSLC 270645
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1245 AM MDT WED AUG 27 2014

UTC025-053-270648-
/O.EXP.KSLC.FF.W.0039.000000T0000Z-140827T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-KANE UT-
1245 AM MDT WED AUG 27 2014

...THE FLASH FLOOD WARNING FOR EAST CENTRAL WASHINGTON AND WEST
CENTRAL KANE COUNTIES WILL EXPIRE AT 1245 AM MDT...

ANY REMANINING ELEVATED RUNOFF IS EXPECTED TO CONTINUE TO DECREASE 
OVER THE NEXT SEVERAL HOURS. ADDITIONAL SHOWERS WILL CONTINUE TO 
MOVE OVER EAST CENTRAL WASHINGTON AND WEST CENTRAL KANE COUNTIES 
THROUGH THE NEXT SEVERAL HOURS...HOWEVER THE HEAVY RAINFALL HAS 
ENDED. THEREFORE...THE WARNING WILL BE ALLOWED TO EXPIRE.


LAT...LON 3742 11291 3736 11285 3718 11289 3716 11304
      3720 11318 3741 11321

$$

CRK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 6:31 PM MDT	Special Weather Statement	SLC	Tooele	59 min
Aug 26, 6:49 PM MDT	Flash Flood Warning	SLC	Kane, Washington	3 hr
Aug 26, 7:10 PM MDT	Flash Flood Warning	SLC	Kane	4 hr
Aug 26, 8:13 PM MDT	Areal Flood Advisory	SLC	Washington	62 min
Aug 26, 9:17 PM MDT	Areal Flood Advisory	SLC	Washington	58 min

Nearby

Flash Flood Warnings in Utah, 2014 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.