Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 104, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 10, 2021, 3:51 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, 3:51 PM MST (22:51 UTC)
- Expired
- Aug 10, 2021, 7:00 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), 88 km from the middle of the area, began a volume at 22:54 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, 10.9 hours before the alert went out and 181 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.
411
WGUS55 KVEF 102251
FFWVEF
AZC015-110200-
/O.NEW.KVEF.FF.W.0104.210810T2251Z-210811T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
351 PM PDT Tue Aug 10 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Central Mohave County in northwestern Arizona...
* Until 700 PM MST.
* At 351 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, Golden Valley and New Kingman-Butler.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3531 11416 3527 11412 3522 11405 3524 11399
3521 11397 3514 11404 3509 11417 3511 11427
3530 11426
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
SC2 follow-up statements
743
WGUS75 KVEF 102300
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
400 PM PDT Tue Aug 10 2021
AZC015-110200-
/O.CON.KVEF.FF.W.0104.000000T0000Z-210811T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
400 PM MST Tue Aug 10 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING
FOR CENTRAL MOHAVE COUNTY...
At 400 PM MST, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Radar
estimates between 1 and 2 inches of rain have fallen. A rain gauge
at Thirteen Mile Wash along Highway 93 receiving 1.10 inches in
under 30 minutes. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Kingman, Golden Valley and New Kingman-Butler. Highway 68.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3531 11416 3527 11412 3522 11405 3524 11399
3521 11397 3514 11404 3509 11417 3511 11427
3530 11426
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
SC818
WGUS75 KVEF 110156
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
656 PM PDT Tue Aug 10 2021
AZC015-110206-
/O.EXP.KVEF.FF.W.0104.000000T0000Z-210811T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
656 PM MST Tue Aug 10 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 7 PM MST THIS EVENING FOR
CENTRAL MOHAVE COUNTY...
The heavy rain has ended in central Mohave County. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
LAT...LON 3531 11416 3527 11412 3522 11405 3524 11399
3521 11397 3514 11404 3509 11417 3511 11427
3530 11426
$$
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, 2:50 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 10, 3:25 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.