Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 33, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 19, 2021, 5:07 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 19, 2021, 5:07 PM MST (00:07 UTC)
- Expired
- Jul 19, 2021, 8:15 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), 98 km from the middle of the area, began a volume at 00:04 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 00:00Z, 0.1 hours before the alert went out and 191 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
- 257 J/kg
- Mixed-layer CIN
- -135 J/kg
- Mixed-layer LCL
- 2423 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
408
WGUS55 KVEF 200007
FFWVEF
AZC015-200315-
/O.NEW.KVEF.FF.W.0033.210720T0007Z-210720T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
507 PM PDT Mon Jul 19 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Southwestern Mohave County in northwestern Arizona...
* Until 815 PM MST.
* At 507 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across Warm Springs Wilderness and the Oatman Topock
Highway. 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...
Bullhead City, Oatman, Mesquite Creek, Oatman Road, Oatman Topock
Highway and Mohave Valley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3487 11429 3481 11428 3472 11447 3472 11449
3473 11449 3477 11451 3485 11453 3490 11455
3495 11457 3500 11458 3508 11458 3515 11438
3514 11438
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CP2 follow-up statements
148
WGUS75 KVEF 200059
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
559 PM PDT Mon Jul 19 2021
AZC015-200315-
/O.CON.KVEF.FF.W.0033.000000T0000Z-210720T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
559 PM MST Mon Jul 19 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM MST THIS
EVENING FOR SOUTHWESTERN MOHAVE COUNTY...
At 559 PM MST, Doppler radar indicated thunderstorms producing heavy
rain across the Black Mountains west and along the Oatman Topock
Highway. Between 1 and 1.5 inches of rain have fallen. Flash
flooding is ongoing or expected to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Bullhead City, Oatman, Mesquite Creek and Mohave Valley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3487 11429 3481 11428 3472 11447 3472 11449
3473 11449 3477 11451 3485 11453 3490 11455
3495 11457 3500 11458 3508 11458 3515 11438
3514 11438
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CP001
WGUS75 KVEF 200308
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
808 PM PDT Mon Jul 19 2021
AZC015-200318-
/O.EXP.KVEF.FF.W.0033.000000T0000Z-210720T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
808 PM MST Mon Jul 19 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 815 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 3487 11429 3481 11428 3472 11447 3472 11449
3473 11449 3477 11451 3485 11453 3490 11455
3495 11457 3500 11458 3508 11458 3515 11438
3514 11438
$$
CPThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 3:13 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Jul 20, 3:28 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.