Alert archive / Utah / Flash Flood Warnings in 2016

Flash Flood Warning 9, NWS Salt Lake City, UT

August 3, 2016Kane County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Aug 3, 2016, 2:55 PM MDT for Kane County, Utah. It was in force for 3 hr. 2 reports 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
Aug 3, 2016, 2:55 PM MDT (20:55 UTC)
Expired
Aug 3, 2016, 6:00 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), 63 km from the middle of the area, began a volume at 20:58 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
Aug 3, 3:35 PM MDTFLASH FLOODKanab, UTFLASH FLOODING WAS REPORTED ALONG KANAB CREEK AND IN THE TOWN OF KANAB
Aug 3, 3:37 PM MDTHEAVY RAIN 1.121 Ne Kanab, UTHEAVY RAIN IN AND AROUND KANAB. STREET FLOODING IN TOWN. RAIN DURATION LESS THAN ONE HOUR.

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

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 8.9 hours before the alert went out and 216 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 2016-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 258 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 2016-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 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
258 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
802 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

656 
WGUS55 KSLC 032058
FFWSLC
UTC025-040000-
/O.NEW.KSLC.FF.W.0009.160803T2055Z-160804T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

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

* UNTIL 600 PM MDT
    
* AT 255 PM MDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN OVER KANAB CREEK NEAR THE TOWN OF KANAB. FLASH FLOODING
  IS EXPECTED TO BEGIN SHORTLY.

* HOURLY ACCUMULATIONS OF AROUND 1.5 INCHES WERE ASSOCIATED WITH
  THESE STORMS.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  KANAB.

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 3713 11246 3701 11242 3700 11270 3714 11265

$$

MCINERNEY/CARR
1 follow-up statement
668 
WGUS75 KSLC 032254
FFSSLC

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

UTC025-040000-
/O.CON.KSLC.FF.W.0009.000000T0000Z-160804T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-
449 PM MDT WED AUG 3 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM MDT FOR
SOUTHWESTERN KANE COUNTY...

AT 449 PM MDT...KANAB CREEK IS FLASH FLOODING.  ROADWAYS NORTH OF
THE TOWN OF KANAB HAVE RECEIVED FLOOD WATERS...ALONG WITH FLOODING
IN THE TOWN OF KANAB ADJACENT TO KANAB CREEK.

RADAR RAINFALL ESTIMATES INDICATE THAT UPWARDS OF 1.5 INCHES HAS
FALLEN OVER THESE AREAS.  HOWEVER...THE HEAVIEST RAINFALL HAS
DECREASED FOR THE IMMEDIATE FUTURE.

IF YOU ARE TRAVELING NEAR HWY 89 HEADING INTO KANAB OR VENTURING
AROUND KANAB CREEK THROUGH THE EVENING AND NIGHTTIME HOURS...PLEASE
BE AWARE THESE AREAS ARE IN FLOOD...AND FLOOD DEBRIS MAY REMAIN ON
ROADWAYS THROUGH THE NIGHT.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
KANAB.

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 3713 11246 3701 11242 3700 11270 3714 11265

$$

MCINERNEY

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, 3:45 PM MDTFlash Flood WarningSLCWashington4 hr
Aug 3, 4:14 PM MDTFlash Flood WarningSLCKane, Washington3 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.