Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 95, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 31, 2021, 5:18 PM MST for Mohave County, Arizona. It was in force for 2 hr. 2 reports 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 31, 2021, 5:18 PM MST (00:18 UTC)
- Expired
- Jul 31, 2021, 7:40 PM MST
- In force
- 2 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), 76 km from the middle of the area, began a volume at 00:18 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 31, 5:20 PM MST | FLASH FLOOD | 11 Ne Dolan Springs, AZ | WATER FLOWING ACROSS STOCKTON HILL ROAD. |
| Jul 31, 6:15 PM MST | FLASH FLOOD | 15 Ne Dolan Springs, AZ | COUNTY OFFICIALS CLOSED ANTARES ROAD FROM PIERCE FERRY ROAD TO HUNTINGTON AVENUE DUE TO FLASH FLOODING DAMAGE. A FOOT DEEP RUT HAS BEEN CARVED INTO THE ROAD DUE TO FLOOD WATERS. TIME AND LOCATION ESTIMATED BY RADAR AND NEARBY REPORTS. ROAD REMAINS CLOSED. |
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, 0.3 hours before the alert went out and 157 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
- 127 J/kg
- Mixed-layer CIN
- -127 J/kg
- Mixed-layer LCL
- 2350 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
044
WGUS55 KVEF 010018
FFWVEF
AZC015-010315-
/O.NEW.KVEF.FF.W.0095.210801T0018Z-210801T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
518 PM PDT Sat Jul 31 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Central Mohave County in northwestern Arizona...
* Until 815 PM MST.
* At 518 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area, especially across portions
Stockton Hill Road. 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...
Pierce Ferry And Antares Roads, Grand Canyon Ranch and Dolan
Springs.
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 3547 11401 3546 11411 3557 11415 3577 11417
3590 11416 3588 11398 3563 11380
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CP1 follow-up statement
013
WGUS75 KVEF 010240
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
740 PM PDT Sat Jul 31 2021
AZC015-010250-
/O.CAN.KVEF.FF.W.0095.000000T0000Z-210801T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
740 PM MST Sat Jul 31 2021
...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL MOHAVE COUNTY...
Flood waters have receded. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 500 AM MST Sunday for
portions of northwest Arizona, southeast California and Nevada.
LAT...LON 3547 11401 3546 11411 3557 11415 3577 11417
3590 11416 3588 11398 3563 11380
$$
CPNearby
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.