Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 102, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 10, 2021, 2:50 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
- Aug 10, 2021, 2:50 PM MST (21:50 UTC)
- Expired
- Aug 10, 2021, 6:00 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 radar
The Las Vegas radar (KESX), 65 km from the middle of the area, began a volume at 21:56 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 12:00Z, 9.8 hours before the alert went out and 150 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
- 6 J/kg
- Mixed-layer CIN
- -327 J/kg
- Mixed-layer LCL
- 3246 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
589
WGUS55 KVEF 102150
FFWVEF
AZC015-110100-
/O.NEW.KVEF.FF.W.0102.210810T2150Z-210811T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
250 PM PDT Tue Aug 10 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
West Central Mohave County in northwestern Arizona...
* Until 600 PM MST.
* At 250 PM MST, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain at the Archibald Wash at Pierce
Ferry Road. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life-threatening flash flooding of low-water
crossings, creeks, normally dry washes and roads.
* Some locations that will experience flash flooding include...
Dolan Springs, Packsaddle Campground, Windy Point Campground and
Chloride.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3571 11422 3570 11407 3559 11409 3554 11406
3535 11414 3542 11425 3551 11433 3572 11433
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
SC2 follow-up statements
122
WGUS75 KVEF 102320
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
420 PM PDT Tue Aug 10 2021
AZC015-110100-
/O.CON.KVEF.FF.W.0102.000000T0000Z-210811T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
420 PM MST Tue Aug 10 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS EVENING
FOR WEST CENTRAL MOHAVE COUNTY...
At 420 PM MST, County road crews reported Stockton Hill Road Closed
up to Pierce Ferry Road. Rain gauges along Pierce Ferry Road
received between one and nearly two inches of rainfall. Flash
flooding is ongoing.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Law enforcement reported.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Dolan Springs, Packsaddle Campground, Windy Point Campground and
Chloride.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3571 11422 3570 11407 3559 11409 3554 11406
3535 11414 3542 11425 3551 11433 3572 11433
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
SC437
WGUS75 KVEF 110053
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
553 PM PDT Tue Aug 10 2021
AZC015-110103-
/O.EXP.KVEF.FF.W.0102.000000T0000Z-210811T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
553 PM MST Tue Aug 10 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 6 PM MST THIS EVENING FOR WEST
CENTRAL MOHAVE COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat along Pierce Ferry Road. Please continue to heed remaining
road closures.
LAT...LON 3571 11422 3570 11407 3559 11409 3554 11406
3535 11414 3542 11425 3551 11433 3572 11433
$$
SCThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 12:30 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 10, 1:22 PM MST | Flash Flood Warning | VEF | Mohave | 2 hr |
| Aug 10, 1:35 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 40 min |
| Aug 10, 2:05 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 10, 2:06 PM MST | Dust Storm Warning | VEF | Mohave | 54 min |
| Aug 10, 2:13 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 10, 3:25 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 10, 3:51 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 10, 4:59 PM MST | Flash Flood Warning | VEF | Mohave | 3 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; radar from the NEXRAD Level II archive.