Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 129, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 31, 2021, 9:38 PM MST for Mohave County, Arizona. It was in force for 3 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
- Aug 31, 2021, 9:38 PM MST (04:38 UTC)
- Expired
- Sep 1, 2021, 12:45 AM 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 radar
The Las Vegas radar (KESX), 98 km from the middle of the area, began a volume at 04:41 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 31, 10:36 PM MST | FLASH FLOOD | 19 Nw Valentine, AZ | MOHAVE COUNTY ROAD WORKS REPORTED ANTARES ROAD BETWEEN OLD ROUTE 66 AND NORTH PIERCE FERRY ROAD WAS CLOSED DUE TO FLOODING. |
| Aug 31, 10:45 PM MST | FLASH FLOOD | 8 N Hualapai Peak, AZ | DELAYED REPORT...DW RANCH ROAD HAD 2 TO 2.5 FEET OF FLOWING WATER AT THE INTERSECTION WITH FREES WASH. TIME ESTIMATED BY RADAR. |
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, 4.6 hours before the alert went out and 182 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 0 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
673
WGUS55 KVEF 010438
FFWVEF
AZC015-010745-
/O.NEW.KVEF.FF.W.0129.210901T0438Z-210901T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
938 PM PDT Tue Aug 31 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Central Mohave County in northwestern Arizona...
* Until 1245 AM MST.
* At 938 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. 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...
Kingman, Valentine, Blake Ranch Road, Antares Road, Dw Ranch Road
and New Kingman-Butler.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3578 11400 3585 11391 3583 11382 3572 11354
3542 11349 3528 11359 3508 11365 3514 11394
3518 11403 3537 11401 3554 11407
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JV3 follow-up statements
873
WGUS75 KVEF 010512
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
1012 PM PDT Tue Aug 31 2021
AZC015-010745-
/O.CON.KVEF.FF.W.0129.000000T0000Z-210901T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
1012 PM MST Tue Aug 31 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 AM MST WEDNESDAY
FOR CENTRAL MOHAVE COUNTY...
At 1012 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Pinion Pines has received around
an inch of rainfall in the last hour, posing a threat to Hualapai
Mountain Road. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Kingman, Valentine, Blake Ranch Road, Antares Road, Dw Ranch Road
and New Kingman-Butler.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3578 11400 3585 11391 3583 11382 3572 11354
3542 11349 3528 11359 3508 11365 3514 11394
3518 11403 3537 11401 3554 11407
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JV903
WGUS75 KVEF 010538
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
1038 PM PDT Tue Aug 31 2021
AZC015-010745-
/O.CON.KVEF.FF.W.0129.000000T0000Z-210901T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
1038 PM MST Tue Aug 31 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 AM MST WEDNESDAY
FOR CENTRAL MOHAVE COUNTY...
At 1038 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Pinion Pines has received around
an inch of rainfall in the last hour, posing a threat to Hualapai
Mountain Road. Antares Road has been closed from Pierce Ferry to
Route 66 due to flooding. Additional 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...
Kingman, Valentine, Blake Ranch Road, Antares Road, Dw Ranch Road
and New Kingman-Butler.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3578 11400 3585 11391 3583 11382 3572 11354
3542 11349 3528 11359 3508 11365 3514 11394
3518 11403 3537 11401 3554 11407
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JV244
WGUS75 KVEF 010703
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
1203 AM PDT Wed Sep 1 2021
AZC015-010745-
/O.CON.KVEF.FF.W.0129.000000T0000Z-210901T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
1203 AM MST Wed Sep 1 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 AM MST WEDNESDAY
FOR CENTRAL MOHAVE COUNTY...
At 1203 AM MST, Doppler radar indicated thunderstorms continuing to
produce heavy rain northeast of Kingman or south and west of
Valentine. Anteras Road north of Route 66 to Pierce Ferry Road has
been closed due to flooding impacts in multiple areas. Radar shows
moderate to heavy rain continuing to fall over Hackberry Road
between Route 66 and Interstate 40.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Kingman, Valentine, Blake Ranch Road, Dw Ranch Road and New
Kingman-Butler.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3578 11400 3585 11391 3583 11382 3572 11354
3542 11349 3528 11359 3508 11365 3514 11394
3518 11403 3537 11401 3554 11407
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JSThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 7:11 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 31, 7:58 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Sep 1, 1:08 AM MST | Areal Flood Advisory | VEF | Mohave | 3 hr |
| Sep 1, 10:15 AM MST | Flash Flood Warning | VEF | Mohave | 116 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.