Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 117, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 29, 2021, 4:18 PM MST for Mohave County, Arizona. It was in force for 117 min. 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 29, 2021, 4:18 PM MST (23:18 UTC)
- Expired
- Aug 29, 2021, 6:15 PM MST
- In force
- 117 min
- 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), 91 km from the middle of the area, began a volume at 23:17 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, 11.3 hours before the alert went out and 185 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
- 350 J/kg
- Mixed-layer CIN
- -157 J/kg
- Mixed-layer LCL
- 3268 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -24 m²/s²
- 0-3 km storm-relative helicity
- -10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
220
WGUS55 KVEF 292318
FFWVEF
AZC015-300115-
/O.NEW.KVEF.FF.W.0117.210829T2318Z-210830T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
418 PM PDT Sun Aug 29 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Southwestern Mohave County in northwestern Arizona...
* Until 615 PM MST.
* At 418 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across Golden Valley, south of highway 68. 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...
Golden Valley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3517 11406 3513 11410 3508 11412 3503 11415
3498 11418 3496 11420 3498 11423 3502 11426
3506 11427 3510 11428 3515 11428 3519 11429
3521 11429 3523 11429 3523 11420 3523 11413
3521 11410 3517 11407
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
BKP2 follow-up statements
243
WGUS75 KVEF 300013
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
513 PM PDT Sun Aug 29 2021
AZC015-300115-
/O.CON.KVEF.FF.W.0117.000000T0000Z-210830T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
513 PM MST Sun Aug 29 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM MST THIS
EVENING FOR SOUTHWESTERN MOHAVE COUNTY...
At 513 PM MST, Doppler radar indicated thunderstorms producing heavy
rain continue near and along Interstate 40 between Kingman and
Yucca. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Golden Valley and the Sacramento Wash.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3517 11406 3513 11410 3508 11412 3503 11415
3498 11418 3496 11420 3498 11423 3502 11426
3506 11427 3510 11428 3515 11428 3519 11429
3521 11429 3523 11429 3523 11420 3523 11413
3521 11410 3517 11407
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
BKP232
WGUS75 KVEF 300110
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
610 PM PDT Sun Aug 29 2021
AZC015-300120-
/O.EXP.KVEF.FF.W.0117.000000T0000Z-210830T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
610 PM MST Sun Aug 29 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 615 PM MST THIS EVENING FOR
SOUTHWESTERN MOHAVE COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3517 11406 3513 11410 3508 11412 3503 11415
3498 11418 3496 11420 3498 11423 3502 11426
3506 11427 3510 11428 3515 11428 3519 11429
3521 11429 3523 11429 3523 11420 3523 11413
3521 11410 3517 11407
$$
BKPThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 3:15 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 32 min |
| Aug 29, 3:43 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.