Alert archive / Nevada / Flash Flood Warnings in 2021

Flash Flood Warning 14, NWS Las Vegas, NV

July 15, 2021Lincoln County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Jul 15, 2021, 11:17 PM PDT for Lincoln County, Nevada. 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 15, 2021, 11:17 PM PDT (06:17 UTC)
Expired: Jul 16, 2021, 2:15 AM PDT
In force: 3 hr
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Lincoln County, NV

The radar

The Cedar City radar (KICX), 182 km from the middle of the area, began a volume at 06:21 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, 6.3 hours before the alert went out and 142 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: 688 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 3158 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

779 
WGUS55 KVEF 160617
FFWVEF
NVC017-160915-
/O.NEW.KVEF.FF.W.0014.210716T0617Z-210716T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
1117 PM PDT Thu Jul 15 2021

The National Weather Service in Las Vegas has issued a

* Flash Flood Warning for...
  Central Lincoln County in south central Nevada...

* Until 215 AM PDT.

* At 1117 PM PDT, Doppler radar indicated thunderstorms producing 
  heavy rain in Highway 93 from mile marker 40 to 102 including 
  Caliente. Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Life-threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Radar.

  IMPACT...Life-threatening flash flooding of low-water
           crossings, creeks, normally dry washes and roads.

* Some locations that will experience flash flooding include...
  Caliente and Kershaw-Ryan Campground.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3762 11511 3763 11505 3772 11445 3753 11438
      3745 11489 3737 11520 3751 11526

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

SC

2 follow-up statements

560 
WGUS75 KVEF 160746
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
1246 AM PDT Fri Jul 16 2021

NVC017-160915-
/O.CON.KVEF.FF.W.0014.000000T0000Z-210716T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lincoln NV-
1246 AM PDT Fri Jul 16 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 AM PDT EARLY THIS 
MORNING FOR CENTRAL LINCOLN COUNTY...

At 1246 AM PDT, Doppler radar indicated thunderstorms that produced 
heavy rain south of Highway 93 which would flow to Highway 93 near 
mile marker 40 to 102 including Caliente. Between 1.5 and 3 inches 
of rain have fallen in this area and flash flooding is imminent or 
ongoing.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of washes, parts of Highway 93 between
         Hiko and Caliente, as well as other poor drainage and
         low-lying areas.

Rain has ended in this area and no additional rainfall is expected, 
however flow from earlier may continue to pose a flash flood threat.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Move away from recently burned areas. Life-threatening flooding of 
creeks, roads and normally dry washes is likely. The heavy rains 
will likely trigger rockslides, mudslides and debris flows in steep 
terrain, especially in and around these areas.

&&

LAT...LON 3762 11511 3763 11505 3772 11445 3753 11438
      3745 11489 3737 11520 3751 11526

FLASH FLOOD...RADAR INDICATED

$$

TB

288 
WGUS75 KVEF 160907
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
207 AM PDT Fri Jul 16 2021

NVC017-160917-
/O.EXP.KVEF.FF.W.0014.000000T0000Z-210716T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lincoln NV-
207 AM PDT Fri Jul 16 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 215 AM PDT EARLY THIS MORNING 
FOR CENTRAL LINCOLN COUNTY...

The heavy rain has ended and flooding is no longer expected to pose 
a threat. Please continue to heed any remaining road closures along 
Highway 93.

LAT...LON 3762 11511 3763 11505 3772 11445 3753 11438
      3745 11489 3737 11520 3751 11526

$$

TB

The office that day

Everything else NWS Las Vegas, NV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 15, 10:11 PM PDT	Areal Flood Advisory	VEF	Lincoln	69 min

Nearby

Flash Flood Warnings in Nevada, 2021 Every flash flood warning in 2021

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.