Alert archive / Nevada / Flash Flood Warnings in 2021

Flash Flood Warning 71, NWS Las Vegas, NV

July 26, 2021Clark County, Nye County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Jul 26, 2021, 11:32 AM PDT for Clark County, Nye County, Nevada. It was in force for 4 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: Jul 26, 2021, 11:32 AM PDT (18:32 UTC)
Expired: Jul 26, 2021, 4:00 PM PDT
In force: 4 hr
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Clark County, NV, Nye County, NV

What was reported inside it

Time	Report	Where	Remark
Jul 26, 11:35 AM PDT	FLASH FLOOD	Pahrump, NV	FLOODING AT THE INTERSECTION OF 372 AND 160. ROAD IS CLOSED.
Jul 26, 12:01 PM PDT	FLASH FLOOD	4 Sse Pahrump, NV	INTERSECTION OF HOMESTEAD RD AND GAMEBIRD RD FLOODED.

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, 6.5 hours before the alert went out and 40 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: 467 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 1095 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

000 
WGUS55 KVEF 261832
FFWVEF
NVC003-023-262130-
/O.NEW.KVEF.FF.W.0071.210726T1832Z-210726T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
1132 AM PDT Mon Jul 26 2021

The National Weather Service in Las Vegas has issued a

* Flash Flood Warning for...
  Southeastern Nye County in south central Nevada...
  West Central Clark County in southern Nevada...

* Until 230 PM PDT.

* At 1132 AM PDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 0.25 and 0.75 inches of 
  rain have fallen in the past 30 minutes on the south side of 
  Pahrump...and rain continues to drift north. Areas of flooding are 
  likely.

  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...
  Pahrump.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3633 11631 3650 11597 3633 11572 3615 11568
      3607 11577 3598 11587

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

$$

CO

5 follow-up statements

476 
WGUS75 KVEF 261907
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
1207 PM PDT Mon Jul 26 2021

NVC003-023-262130-
/O.CON.KVEF.FF.W.0071.000000T0000Z-210726T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-Nye NV-
1207 PM PDT Mon Jul 26 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 PM PDT THIS 
AFTERNOON FOR SOUTHEASTERN NYE AND WEST CENTRAL CLARK COUNTIES...

At 1207 PM PDT, Thunderstorms continue around the Pahrump Valley 
with rainfall totals of .5 to 1 inch reported in the past hour. 
Local roadways have begun to flood and numerous local road closures 
have been reported.

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...
  Pahrump.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3633 11631 3650 11597 3633 11572 3615 11568
      3607 11577 3598 11587

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

$$

CO

516 
WGUS75 KVEF 261935
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
1235 PM PDT Mon Jul 26 2021

NVC003-023-262130-
/O.CON.KVEF.FF.W.0071.000000T0000Z-210726T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-Nye NV-
1235 PM PDT Mon Jul 26 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 PM PDT THIS 
AFTERNOON FOR SOUTHEASTERN NYE AND WEST CENTRAL CLARK COUNTIES...

At 1235 PM PDT, Heavy rain and flooding continues across the Pahrump 
Valley. A rain gauge in central Pahrump measured 1.70 inches since 
11am. Numerous roadways are impassable and heavily flooded.

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...
  Pahrump.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3633 11631 3650 11597 3633 11572 3615 11568
      3607 11577 3598 11587

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

$$

CO

893 
WGUS55 KVEF 262125
FFWVEF
NVC003-023-262300-
/O.EXT.KVEF.FF.W.0071.000000T0000Z-210726T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
225 PM PDT Mon Jul 26 2021

The National Weather Service in Las Vegas has extended the

* Flash Flood Warning for...
  Southeastern Nye County in south central Nevada...
  West Central Clark County in southern Nevada...

* Until 400 PM PDT.

* At 225 PM PDT, Pahrump area emergency management reported ongoing 
  flooding in the Pahrump Valley. Earlier storm activity produced 
  between Between 1 and 2 inches of rain and local roadways remain 
  impassable in many areas.

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

  SOURCE...Emergency management reported.

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

* Some locations that will experience flash flooding include...
  Pahrump.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3633 11631 3650 11597 3633 11572 3615 11568
      3607 11577 3598 11587

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

CO

659 
WGUS75 KVEF 262144
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
244 PM PDT Mon Jul 26 2021

NVC003-023-262300-
/O.CON.KVEF.FF.W.0071.000000T0000Z-210726T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-Nye NV-
244 PM PDT Mon Jul 26 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 4 PM PDT THIS 
AFTERNOON FOR SOUTHEASTERN NYE AND WEST CENTRAL CLARK COUNTIES...

At 244 PM PDT, Flooding response efforts continue around Pahrump, 
with ongoing swift water rescues occuring. Local roadways remains 
flooded and impassable in some locations.

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

SOURCE...Emergency management reported.

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

Some locations that will experience flash flooding include...
  Pahrump.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3633 11631 3650 11597 3633 11572 3615 11568
      3607 11577 3598 11587

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

CO

309 
WGUS75 KVEF 262255
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
355 PM PDT Mon Jul 26 2021

NVC003-023-262305-
/O.EXP.KVEF.FF.W.0071.000000T0000Z-210726T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-Nye NV-
355 PM PDT Mon Jul 26 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 4 PM PDT THIS AFTERNOON FOR 
SOUTHEASTERN NYE AND WEST CENTRAL CLARK COUNTIES...

Flood waters have receded and heavy rainfall has ended across the 
Pahrump Valley. Flood clean up efforts continue across the region so 
please continue to heed remaining road closures.

A Flash Flood Watch remains in effect until 1100 PM PDT Monday for 
portions of southeast California and Nevada.

LAT...LON 3633 11631 3650 11597 3633 11572 3615 11568
      3607 11577 3598 11587

$$

CO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 5:12 PM PDT	Dust Storm Warning	VEF	Clark	63 min
Jul 25, 5:37 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Lincoln	3 hr
Jul 25, 6:01 PM PDT	Severe Thunderstorm Warning	VEF	Clark	59 min
Jul 25, 6:06 PM PDT	Severe Thunderstorm Warning	VEF	Lincoln	39 min
Jul 25, 7:08 PM PDT	Severe Thunderstorm Warning	VEF	Clark	52 min
Jul 25, 7:57 PM PDT	Severe Thunderstorm Warning	VEF	Clark, Lincoln	63 min
Jul 25, 8:09 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Clark	3 hr
Jul 25, 8:59 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Clark	3 hr
Jul 25, 8:59 PM PDT	Severe Thunderstorm Warning	VEF	Clark, Nye	61 min
Jul 25, 9:55 PM PDT	Severe Thunderstorm Warning	VEF	Clark, Nye	50 min
Jul 26, 10:20 AM PDT	Flash Flood Warning Considerable damage threat	VEF	Clark	3 hr
Jul 26, 10:44 AM PDT	Flash Flood Warning Considerable damage threat	VEF	Clark	3 hr
Jul 26, 12:29 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Nye	3 hr
Jul 26, 12:40 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Nye	3 hr
Jul 26, 1:28 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Lincoln	3 hr
Jul 26, 2:05 PM PDT	Severe Thunderstorm Warning	VEF	Lincoln	40 min
Jul 26, 4:30 PM PDT	Flash Flood Warning Considerable damage threat	VEF	Lincoln	2 hr
Jul 26, 4:34 PM PDT	Severe Thunderstorm Warning	VEF	Lincoln	41 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.