Alert archive / Utah / Flash Flood Warnings in 2018

Flash Flood Warning 3, NWS Salt Lake City, UT

July 7, 2018Kane County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Jul 7, 2018, 8:11 PM 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
Jul 7, 2018, 8:11 PM MDT (02:11 UTC)
Expired
Jul 7, 2018, 11:00 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), 90 km from the middle of the area, began a volume at 02:10 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 00:00Z, 2.2 hours before the alert went out and 212 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 00:00Z on 2018-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 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 00:00Z on 2018-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 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
6 J/kg
Mixed-layer CIN
-217 J/kg
Mixed-layer LCL
2068 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
81 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

538 
WGUS55 KSLC 080211
FFWSLC
UTC025-080500-
/O.NEW.KSLC.FF.W.0003.180708T0211Z-180708T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
811 PM MDT SAT JUL 7 2018

The National Weather Service in Salt Lake City has issued a

* Flash Flood Warning for...
  South central Kane County in southern Utah...

* Until 1100 PM MDT
    
* At 806 PM MDT, Doppler radar indicated a thunderstorm producing heavy rain 
  over south-central Kane County. Over one inch of rain has already fallen. 
  Flash flooding is expected along Kitchen Corral Wash and Buckskin Gulch. 

* Flash flooding will remain over mainly rural areas of south central
  Kane County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

&&

LAT...LON 3724 11205 3706 11194 3700 11183 3700 11204
      3722 11222

$$

LC
2 follow-up statements
363 
WGUS75 KSLC 080349
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
949 PM MDT SAT JUL 7 2018

UTC025-080500-
/O.CON.KSLC.FF.W.0003.000000T0000Z-180708T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kane UT-
949 PM MDT SAT JUL 7 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 PM MDT FOR
SOUTH CENTRAL KANE COUNTY...

At 947 PM MDT, Doppler radar indicated around one and a half inches of rain 
have already fallen across south-central Utah. This is likely resulting in 
flash flooding along Kitchen Corral Wash and Buckskin Gulch.

Flash flooding will remain over mainly rural areas of south central
Kane County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

&&

LAT...LON 3724 11205 3706 11194 3700 11183 3700 11204
      3722 11222

$$

LC
235 
WGUS75 KSLC 080453
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
1053 PM MDT SAT JUL 7 2018

UTC025-080500-
/O.EXP.KSLC.FF.W.0003.000000T0000Z-180708T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kane UT-
1053 PM MDT SAT JUL 7 2018

...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL KANE COUNTY WILL EXPIRE
AT 1100 PM MDT...

The heavy rain has ended. Flood waters will continue to recede and flooding is 
no longer expected to pose a threat. Please remain vigilant of high flows along 
Kitchen Corral Wash and Buckskin Gulch. 

LAT...LON 3724 11205 3706 11194 3700 11183 3700 11204
      3722 11222

$$

LC

Nearby

Flash Flood Warnings in Utah, 2018Every flash flood warning in 2018

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.