Alert archive / Utah / Flash Flood Warnings in 2014

Flash Flood Warning 52, NWS Salt Lake City, UT

September 27, 2014Washington County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Sep 27, 2014, 10:06 AM MDT for 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 27, 2014, 10:06 AM MDT (16:06 UTC)
Expired: Sep 27, 2014, 1:00 PM MDT
In force: 3 hr
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon
Flood severity: None

County Washington County, UT

The radar

The Cedar City radar (KICX), 89 km from the middle of the area, began a volume at 16:09 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

Time	Report	Where	Remark
Sep 27, 10:10 AM MDT	FLASH FLOOD	Ivins, UT	HOMES FLOODED IN IVINS AROUND 600 S AND 400 W.

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, 4.1 hours before the alert went out and 185 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: 2262 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 48 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.

729 
WGUS55 KSLC 271606
FFWSLC
UTC053-271900-
/O.NEW.KSLC.FF.W.0052.140927T1606Z-140927T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1006 AM MDT SAT SEP 27 2014

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN WASHINGTON COUNTY IN UTAH...

* UNTIL 100 PM MDT
    
* AT 1003 AM MDT...LOCAL LAW ENFORCEMENT REPORTED FLOODING FROM 
  THUNDERSTORMS PRODUCING HEAVY RAIN IN IVINS. MORE THAN 1.50 INCHES 
  OF RAIN HAS FALLEN OVER SOUTHWESTERN WASHINGTON COUNTY...AND 
  STREET FLOODING HAS BEEN REPORTED ACROSS IVINS.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SANTA CLARA...IVINS...SNOW CANYON STATE PARK AND VEYO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3700 11385 3703 11385 3743 11372 3742 11357
      3739 11356 3700 11368

$$

ES

1 follow-up statement

883 
WGUS75 KSLC 271644
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1044 AM MDT SAT SEP 27 2014

UTC053-271647-
/O.CAN.KSLC.FF.W.0052.000000T0000Z-140927T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-
1044 AM MDT SAT SEP 27 2014

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN WASHINGTON COUNTY IS
CANCELLED...

AN AREAL FLOOD WARNING HAS BEEN ISSUED FOR THIS AREA...WHICH 
SUPERSEDE THE FLASH FLOOD WARNING ISSUED EARLIER.  FLOODING 
CONTINUES IN THE REGION...HOWEVER THE AREAL FLOOD WARNING COVERS A 
LARGER AREA FOR A LONGER TIME. 
 
AS SUCH...PLEASE REFER TO THE FLWSLC PRODUCT ISSUED AT 1035 AM FOR 
ADDITIONAL INFORMATION ON THE CURRENT FLOODING IN SOUTHERN UTAH.
 
IT IS ANTICIPATED THE FLOODING IN IVINS WILL CONTINUE THROUGH THE 
MORNING HOURS.

LAT...LON 3700 11385 3703 11385 3743 11372 3742 11357
      3739 11356 3700 11368

$$

MCINERNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 26, 6:31 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder	44 min
Sep 26, 7:05 PM MDT	Special Weather Statement	SLC	Salt Lake	40 min
Sep 26, 7:08 PM MDT	Severe Thunderstorm Warning	SLC	Tooele	37 min
Sep 27, 12:29 AM MDT	Special Weather Statement	SLC	Tooele	76 min
Sep 27, 1:44 AM MDT	Special Weather Statement	SLC	Box Elder	76 min
Sep 27, 2:28 AM MDT	Severe Thunderstorm Warning	SLC	Box Elder	51 min
Sep 27, 8:27 AM MDT	Severe Thunderstorm Warning	SLC	Washington	33 min
Sep 27, 9:22 AM MDT	Flash Flood Warning	SLC	Emery	3 hr
Sep 27, 9:47 AM MDT	Flash Flood Warning	SLC	Kane, Washington	3 hr
Sep 27, 10:35 AM MDT	Areal Flood Warning	SLC	Iron, Kane, Washington	6 hr
Sep 27, 10:43 AM MDT	Severe Thunderstorm Warning	SLC	Iron, Kane, Washington	32 min
Sep 27, 11:48 AM MDT	Severe Thunderstorm Warning	SLC	Garfield, Kane	27 min
Sep 27, 12:30 PM MDT	Special Weather Statement	SLC	Piute	30 min
Sep 27, 2:17 PM MDT	Special Weather Statement	SLC	Carbon	13 min
Sep 27, 2:32 PM MDT	Areal Flood Warning	SLC	Emery, Garfield, Iron, Kane, Piute, San Juan and 1 more	8 hr
Sep 27, 3:06 PM MDT	Special Weather Statement	SLC	Duchesne	24 min
Sep 27, 3:58 PM MDT	Flash Flood Warning	SLC	Carbon, Emery	4 hr
Sep 27, 4:52 PM MDT	Areal Flood Advisory	SLC	Salt Lake	3 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.