Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 55, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 23, 2021, 4:39 PM MST for Mohave County, Arizona. It was in force for 81 min. 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 23, 2021, 4:39 PM MST (23:39 UTC)
- Expired
- Jul 23, 2021, 6:00 PM MST
- In force
- 81 min
- 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), 133 km from the middle of the area, began a volume at 23:40 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 11.7 hours before the alert went out and 160 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
- 503 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 915 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
621
WGUS55 KVEF 232339
FFWVEF
AZC015-240100-
/O.NEW.KVEF.FF.W.0055.210723T2339Z-210724T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
439 PM PDT Fri Jul 23 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Central Mohave County in northwestern Arizona...
* Until 600 PM MST.
* At 439 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.75 and 1.5 inches of
rain have likely fallen resulting in runoff possibly affecting
parts of Interstate 40. 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...
mainly rural areas of Central Mohave County but including the
Interstate 40 corridor east of US 93 interchange.
This includes the following highways...
Interstate 40 in Arizona between mile markers 74 and 88.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3526 11366 3531 11352 3530 11339 3519 11340
3512 11352 3508 11365 3514 11366
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
TB2 follow-up statements
061
WGUS75 KVEF 240026
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
526 PM PDT Fri Jul 23 2021
AZC015-240100-
/O.CON.KVEF.FF.W.0055.000000T0000Z-210724T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
526 PM MST Fri Jul 23 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS EVENING
FOR CENTRAL MOHAVE COUNTY...
At 526 PM MST, Public reports of flooding on Interstate 40 were
received in the last hour. Between 1 and 2 inches of rain have
fallen in this area and flash flooding is likely ongoing.
HAZARD...Life-threatening flash flooding.
SOURCE...Public reported.
IMPACT...Life-threatening flash flooding of low-water crossings
along Interstate 40, creeks, normally dry washes and
roads.
Some locations that will experience flash flooding include...
mainly rural areas of Central Mohave County along the Interstate
40 corridor.
This includes the following highways...
Interstate 40 in Arizona between mile markers 74 and 89.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3526 11366 3531 11352 3530 11339 3519 11340
3512 11352 3508 11365 3514 11366
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
TB353
WGUS75 KVEF 240056
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
556 PM PDT Fri Jul 23 2021
AZC015-240106-
/O.EXP.KVEF.FF.W.0055.000000T0000Z-210724T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
556 PM MST Fri Jul 23 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 6 PM MST THIS EVENING FOR
CENTRAL MOHAVE COUNTY...
Flood waters have receded and the heavy rain has ended. Flooding is
no longer expected to pose a threat. Please continue to heed
remaining road closures and avoid driving through flooded roadways.
LAT...LON 3526 11366 3531 11352 3530 11339 3519 11340
3512 11352 3508 11365 3514 11366
$$
TBThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 1:11 PM MST | Flash Flood Watch | VEF | Mohave | 3 days |
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.