Alert archive / Arizona / Flash Flood Warnings in 2021

Flash Flood Warning 10, NWS Las Vegas, NV

July 14, 2021Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 14, 2021, 7:19 PM MST for Mohave County, Arizona. 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 14, 2021, 7:19 PM MST (02:19 UTC)
Expired
Jul 14, 2021, 10:24 PM MST
In force
3 hr
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Damage threat
Considerable
Flood severity
None

County Mohave County, AZ

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 2.3 hours before the alert went out and 166 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 2021-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 22 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 00:00Z on 2021-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -21 square meters per square second.193958Sfc1 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
22 J/kg
Mixed-layer CIN
-222 J/kg
Mixed-layer LCL
1650 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-21 m²/s²
0-3 km storm-relative helicity
2 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

127 
WGUS55 KVEF 150219
FFWVEF
AZC015-150530-
/O.NEW.KVEF.FF.W.0010.210715T0219Z-210715T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
719 PM PDT Wed Jul 14 2021

The National Weather Service in Las Vegas has issued a

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

* Until 1030 PM MST.

* At 719 PM MST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 0.5 and 0.75 inches of 
  rain have fallen. Additional rainfall amounts of 0.25 to 0.5 
  inches are possible in the warned area. Flash flooding is ongoing 
  or expected to begin shortly along Hackberry Road north of 
  Interstate 40.

  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...
  mainly rural areas of Central Mohave County including Hackberry 
  Rd. north of Interstate 40.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3530 11368 3531 11369 3532 11369 3533 11369
      3535 11353 3519 11349 3517 11355 3517 11364

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

$$

JV
2 follow-up statements
240 
WGUS75 KVEF 150332
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
832 PM PDT Wed Jul 14 2021

AZC015-150530-
/O.CON.KVEF.FF.W.0010.000000T0000Z-210715T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
832 PM MST Wed Jul 14 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM MST THIS 
EVENING FOR CENTRAL MOHAVE COUNTY...

At 832 PM MST, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Rainfall has stopped over the area, but 
flash flooding across Hackberry Road between Historic Route 66 and 
Interstate 40.

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...
  mainly rural areas of Central Mohave County along Hackberry Road 
  between Historic Route 66 and Interstate 40.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3530 11368 3531 11369 3532 11369 3533 11369
      3535 11353 3519 11349 3517 11355 3517 11364

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

$$

JV
991 
WGUS75 KVEF 150524
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
1024 PM PDT Wed Jul 14 2021

AZC015-150534-
/O.CAN.KVEF.FF.W.0010.000000T0000Z-210715T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
1024 PM MST Wed Jul 14 2021

...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL MOHAVE COUNTY...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures, if applicable.

LAT...LON 3530 11368 3531 11369 3532 11369 3533 11369
      3535 11353 3519 11349 3517 11355 3517 11364

$$

JV

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 11:42 PM MSTFlash Flood Warning Considerable damage threatVEFMohave3 hr
Jul 15, 12:03 AM MSTFlash Flood Warning Considerable damage threatVEFMohave3 hr
Jul 15, 1:01 AM MSTFlash Flood Warning Considerable damage threatVEFMohave4 hr

Nearby

Flash Flood Warnings in Arizona, 2021Every 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.