Alert archive / Arizona / Flash Flood Warnings in 2021

Flash Flood Warning 13, NWS Las Vegas, NV

July 15, 2021Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 15, 2021, 1:01 AM MST for Mohave County, Arizona. 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 15, 2021, 1:01 AM MST (08:01 UTC)
Expired: Jul 15, 2021, 5:00 AM MST
In force: 4 hr
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Mohave County, AZ

What was reported inside it

Time	Report	Where	Remark
Jul 15, 2:30 AM MST	FLASH FLOOD	4 Sw Dolan Springs, AZ	MOHAVE ROADS DEPARTMENT REPORTED DEBRIS FROM FLASH FLOODING OVER PIERCE FERRY ROAD FROM HIGHWAY 93 TO MILE MARKER 4.
Jul 15, 2:45 AM MST	FLASH FLOOD	2 Nne Hualapai Peak, AZ	MOHAVE COUNTY ROADS DEPARTMENT REPORTED DEBRIS WASHED OVER SEVERAL ROADS IN THE HUALAPAI MTNS INCLUDING HUALAPAI MTN RD DUE TO FLASH FLOODING.

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 00:00Z, 8.0 hours before the alert went out and 168 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: 523 J/kg
Mixed-layer CIN: -274 J/kg
Mixed-layer LCL: 2860 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

324 
WGUS55 KVEF 150801
FFWVEF
AZC015-151100-
/O.NEW.KVEF.FF.W.0013.210715T0801Z-210715T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Las Vegas has issued a

* Flash Flood Warning for...
  West Central Mohave County in northwestern Arizona...

* Until 400 AM MST.

* At 101 AM MST, Satellite indicated thunderstorms producing heavy 
  rain across the warned area. Between 0.5 and 0.75 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly along Highway 93 from Dolan Springs down to Kingman and 
  Golden Valley including the Hualapai Mountains and the Flag Fire 
  Burn Scar.

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

  SOURCE...Observations and satellite.

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

* Some locations that will experience flash flooding include...
  Kingman, Chloride, New Kingman-Butler, Windy Point Campground, 
  Packsaddle Campground, Golden Valley, Dolan Springs, Dw Ranch 
  Road, Hualapai Mountain Park, Blake Ranch Road, Wild Cow 
  Campground, Hualapai Peak, Pine Lake, and the Flag Fire Burn Scar.

Rainfall rates over 1 inch per hour have been observed and will be 
possible over the next 3 hours. These rainfall rates could impact 
both the Element Fire and the Flag Fire Burn Scar.

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 3575 11421 3530 11382 3498 11367 3501 11424
      3566 11453

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

$$

JV

4 follow-up statements

246 
WGUS75 KVEF 150837
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
137 AM PDT Thu Jul 15 2021

AZC015-151100-
/O.CON.KVEF.FF.W.0013.000000T0000Z-210715T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
137 AM MST Thu Jul 15 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 4 AM MST EARLY THIS 
MORNING FOR WEST CENTRAL MOHAVE COUNTY...

At 137 AM MST, Satellite indicated thunderstorms producing heavy 
rain. Flash flooding is ongoing or expected to begin shortly, 
particularly east of Kingman where rain rates of 2 inches an hour 
have been observed. The Flag Fire Burn Scar has measured a quarter 
of an inch of rain. Rain continues to fall.

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

SOURCE...Satellite and observations.

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

Locations that will experience flash flooding include...
  Kingman, Chloride, Packsaddle Campground, Golden Valley, Dolan 
  Springs, Hualapai Mountain Park, Blake Ranch Road, Hualapai Peak, 
  Elements Fire, Pine Lake, and the Flag Fire Burn Scar.

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 3575 11421 3530 11382 3498 11367 3501 11424
      3566 11453

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

$$

JV

096 
WGUS75 KVEF 150914
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
214 AM PDT Thu Jul 15 2021

AZC015-151100-
/O.CON.KVEF.FF.W.0013.000000T0000Z-210715T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
214 AM MST Thu Jul 15 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 4 AM MST EARLY THIS 
MORNING FOR WEST CENTRAL MOHAVE COUNTY...

At 214 AM MST, Satellite indicated thunderstorms producing heavy 
rain. Flash flooding is ongoing, with over an inch of rain measured 
in parts of Kingman and three quarters of an inch over the Flag Fire 
Burn Scar.

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

SOURCE...Satellite and observations.

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

Locations that will experience flash flooding include...
  Kingman, Chloride, Packsaddle Campground, Golden Valley, Dolan 
  Springs, Hualapai Mountain Park, Blake Ranch Road, Hualapai Peak, 
  Elements Fire, Pine Lake, and the Flag Fire Burn Scar.

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 3575 11421 3530 11382 3498 11367 3501 11424
      3566 11453

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

$$

JV

713 
WGUS75 KVEF 150959
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
259 AM PDT Thu Jul 15 2021

AZC015-151100-
/O.CON.KVEF.FF.W.0013.000000T0000Z-210715T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
259 AM MST Thu Jul 15 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 4 AM MST EARLY THIS 
MORNING FOR WEST CENTRAL MOHAVE COUNTY...

At 259 AM MST, Satellite indicated thunderstorms producing heavy 
rain. An additional storm is moving into the warned area and could 
drop an additional tenth to half of an inch over the Flag Fire Burn 
Scar.

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

SOURCE...Satellite and observations.

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

Locations that will experience flash flooding include...
  Kingman, Chloride, Packsaddle Campground, Golden Valley, Dolan 
  Springs, Hualapai Mountain Park, Blake Ranch Road, Hualapai Peak, 
  Elements Fire, Pine Lake, and the Flag Fire Burn Scar.

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 3575 11421 3530 11382 3498 11367 3501 11424
      3566 11453

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

$$

JV

725 
WGUS55 KVEF 151057
FFWVEF
AZC015-151200-
/O.EXT.KVEF.FF.W.0013.000000T0000Z-210715T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Las Vegas has extended the

* Flash Flood Warning for...
  West Central Mohave County in northwestern Arizona...

* Until 500 AM MST.

* At 357 AM MST, Satellite estimates and rain gauges indicate that 
  rain continues to fall over portions of Kingman and the Flag Fire 
  Burn Scar. Elsewhere, where rain has ceased, flash flooding 
  remains a concern. Heed all road closures, if applicable.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Satellite and observations.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Locations that will experience flash flooding include...
  Kingman, Golden Valley, Dolan Springs, Hualapai Mountain Park, 
  Hualapai Peak, Elements Fire, Pine Lake, and the Flag Fire Burn 
  Scar.

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 3575 11421 3530 11382 3498 11367 3501 11424
      3566 11453

FLASH FLOOD...SATELLITE AND GAUGE INDICATED

$$

JV

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 7:19 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Jul 14, 11:42 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Jul 15, 12:03 AM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr

Nearby

Flash Flood Warnings in Arizona, 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.