Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 116, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 29, 2021, 3:43 PM MST for Mohave County, Arizona. It was in force for 3 hr. 1 report 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 29, 2021, 3:43 PM MST (22:43 UTC)
- Expired
- Aug 29, 2021, 6:45 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), 115 km from the middle of the area, began a volume at 22:45 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 29, 4:18 PM MST | FLASH FLOOD | 2 Ne Hualapai Peak, AZ | EMERGENCY MANAGERS REPORTED DANGEROUS FLOODING OVER FLAG MINE ROAD AT HUALAPAI MOUNTAIN PARK. THE ROAD IS CLOSED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 10.7 hours before the alert went out and 188 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
- 21 J/kg
- Mixed-layer CIN
- -175 J/kg
- Mixed-layer LCL
- 2328 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
494
WGUS55 KVEF 292243
FFWVEF
AZC015-300145-
/O.NEW.KVEF.FF.W.0116.210829T2243Z-210830T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
343 PM PDT Sun Aug 29 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
The Flag Burn Area in...
Southern Mohave County in northwestern Arizona...
* Until 645 PM MST.
* At 343 PM MST, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain over the Flag Burn Area.
Between 0.5 and 0.75 inches of rain have fallen. Additional
rainfall amounts of 0.5 to 0.75 inches are possible in the warned
area. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms
producing flash flooding in and around the Flag Burn
Area.
SOURCE...Radar and automated gauges.
IMPACT...Life-threatening flash flooding of areas in and around
the Flag Burn Area.
* Some locations that will experience flash flooding include...
Hualapai Mountain Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is a life-threatening situation. Heavy rainfall will cause
extensive and severe flash flooding of Wheeler Wash and other washes
in and around Pine Lake and the Hualapai Mountain Park. Debris flows
can occur well downstream of the burn area which could potentially
impact area roads. Watch for falling rocks. If you encounter flood
waters...climb to safety.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3509 11383 3509 11381 3508 11384 3508 11385
3508 11386 3508 11387 3507 11388 3508 11390
3509 11391 3509 11390 3510 11389 3510 11388
3509 11387 3509 11386 3509 11385
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
BKP3 follow-up statements
047
WGUS55 KVEF 292249 CCA
FFWVEF
AZC015-300145-
/O.COR.KVEF.FF.W.0116.210829T2243Z-210830T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning...CORRECTED
National Weather Service Las Vegas NV
349 PM PDT Sun Aug 29 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
The Flag Burn Area in...
Southern Mohave County in northwestern Arizona...
* Until 645 PM MST.
* At 343 PM MST, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain over the Flag Burn Area.
Between 0.5 and 0.75 inches of rain have fallen. Additional
rainfall amounts of 0.5 to 0.75 inches are possible in the warned
area. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms
producing flash flooding in and around the Flag Burn
Area.
SOURCE...Radar and automated gauges.
IMPACT...Life-threatening flash flooding of areas in and around
the Flag Burn Area.
* Some locations that will experience flash flooding include...
Hualapai Mountain Park and Pine Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is a life-threatening situation. Heavy rainfall will cause
extensive and severe flash flooding of Wheeler Wash and other washes
in and around Pine Lake and the Hualapai Mountain Park. Debris flows
can occur well downstream of the burn area which could potentially
impact area roads. Watch for falling rocks. If you encounter flood
waters...climb to safety.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3509 11383 3509 11381 3508 11384 3508 11385
3508 11386 3508 11387 3507 11388 3508 11390
3509 11391 3509 11390 3510 11389 3510 11388
3509 11387 3509 11386 3509 11385
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
BKP946
WGUS75 KVEF 292342
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
442 PM PDT Sun Aug 29 2021
AZC015-300145-
/O.CON.KVEF.FF.W.0116.000000T0000Z-210830T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
442 PM MST Sun Aug 29 2021
...FLASH FLOOD WARNING FOR THE FLAG BURN AREA REMAINS IN EFFECT
UNTIL 645 PM MST THIS EVENING FOR SOUTHERN MOHAVE COUNTY...
At 442 PM MST, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain over the Flag Burn Area have
weakened. Mohave County Flood Control gages observed up to 1.30
inches on the burn scar. Flooding of washes and roads is still
occurring.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding in and around the Flag Burn Area.
SOURCE...Radar and automated gauges.
IMPACT...Life-threatening flash flooding of areas in and around
the Flag Burn Area.
Some locations that will experience flash flooding include...
Hualapai Mountain Park and Pine Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is a life-threatening situation. Heavy rainfall will cause
extensive and severe flash flooding of Wheeler Wash and other washes
in and around Pine Lake and the Hualapai Mountain Park. Debris flows
can occur well downstream of the burn area which could potentially
impact area roads. Watch for falling rocks. If you encounter flood
waters...climb to safety.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3509 11383 3509 11381 3508 11384 3508 11385
3508 11386 3508 11387 3507 11388 3508 11390
3509 11391 3509 11390 3510 11389 3510 11388
3509 11387 3509 11386 3509 11385
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
BKP746
WGUS75 KVEF 300141
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
641 PM PDT Sun Aug 29 2021
AZC015-300151-
/O.EXP.KVEF.FF.W.0116.000000T0000Z-210830T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
641 PM MST Sun Aug 29 2021
...FLASH FLOOD WARNING FOR THE FLAG BURN AREA WILL EXPIRE AT 645 PM
MST THIS EVENING FOR SOUTHERN MOHAVE COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3509 11383 3509 11381 3508 11384 3508 11385
3508 11386 3508 11387 3507 11388 3508 11390
3509 11391 3509 11390 3510 11389 3510 11388
3509 11387 3509 11386 3509 11385
$$
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, 4:18 PM MST | Flash Flood Warning | VEF | Mohave | 117 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.