Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 27, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 18, 2021, 5:40 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
- Jul 18, 2021, 5:40 PM MST (00:40 UTC)
- Expired
- Jul 18, 2021, 8:45 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), 71 km from the middle of the area, began a volume at 00:41 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 |
|---|---|---|---|
| Jul 18, 6:15 PM MST | FLASH FLOOD | 2 Ne Meadview, AZ | SPOTTER IN MEADVIEW REPORTED THAT WATER WASHED OUT SPENCER DRIVE AND LEFT QUITE A BIT OF MUD OVER THE ROAD. ALSO REPORTED THAT THE WASH HAD CROSSED OVER PIERCE FERRY ROAD YESTERDAY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 00:00Z, 0.7 hours before the alert went out and 136 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
- 470 J/kg
- Mixed-layer CIN
- -221 J/kg
- Mixed-layer LCL
- 2357 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -43 m²/s²
- 0-3 km storm-relative helicity
- -38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
052
WGUS55 KVEF 190040
FFWVEF
AZC015-190345-
/O.NEW.KVEF.FF.W.0027.210719T0040Z-210719T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
540 PM PDT Sun Jul 18 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
West Central Mohave County in northwestern Arizona...
* Until 845 PM MST.
* At 540 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding is ongoing or
expected to begin shortly in Meadview impacting Pierce Ferry Road.
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...
Pierce Ferry And Antares Roads, Grand Canyon Ranch, Meadview and
Dolan Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3598 11423 3608 11401 3584 11392 3567 11419
3584 11431
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JV2 follow-up statements
190
WGUS75 KVEF 190137
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
637 PM PDT Sun Jul 18 2021
AZC015-190345-
/O.CON.KVEF.FF.W.0027.000000T0000Z-210719T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
637 PM MST Sun Jul 18 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM MST THIS
EVENING FOR WEST CENTRAL MOHAVE COUNTY...
At 637 PM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Flash flooding is ongoing or expected
to begin shortly in Meadview impacting Pierce Ferry Road. Meadview
sensor has measured over an inch of rainfall, and rain continues to
fall.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Pierce Ferry And Antares Roads, Grand Canyon Ranch, Meadview and
Dolan Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3598 11423 3608 11401 3584 11392 3567 11419
3584 11431
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JV050
WGUS75 KVEF 190339
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
839 PM PDT Sun Jul 18 2021
AZC015-190349-
/O.EXP.KVEF.FF.W.0027.000000T0000Z-210719T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
839 PM MST Sun Jul 18 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 845 PM MST THIS EVENING FOR
WEST CENTRAL MOHAVE COUNTY...
Flood waters have receded. Isolated moderate rainfall, nuisance
flooding and roadway ponding expected to continue over the next
hour. Heed all road closures, if applicable.
LAT...LON 3598 11423 3608 11401 3584 11392 3567 11419
3584 11431
$$
JVThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 5:20 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 40 min |
| Jul 18, 6:20 PM MST | Flash Flood Warning | VEF | Mohave | 6 hr |
| Jul 19, 2:37 AM MST | Flash Flood Watch | VEF | Mohave | 17 hr |
| Jul 19, 2:31 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Jul 19, 3:31 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.