Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 78, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 26, 2021, 1:51 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
- Jul 26, 2021, 1:51 PM MST (20:51 UTC)
- Expired
- Jul 26, 2021, 5:00 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 Cedar City radar (KICX), 122 km from the middle of the area, began a volume at 20:54 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, 8.9 hours before the alert went out and 156 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
- 467 J/kg
- Mixed-layer CIN
- -144 J/kg
- Mixed-layer LCL
- 1095 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -37 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
937
WGUS55 KVEF 262051
FFWVEF
AZC015-270000-
/O.NEW.KVEF.FF.W.0078.210726T2051Z-210727T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
151 PM PDT Mon Jul 26 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
North Central Mohave County in northwestern Arizona...
* Until 500 PM MST.
* At 151 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the Arizona Strip. A rain gauge at Scenic
measured near 1 inch of rain in 30 minutes. 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...
Littlefield, Virgin River Gorge, Beaver Dam and Virgin River
Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3700 11360 3689 11358 3681 11365 3667 11403
3671 11405 3675 11405 3684 11405 3688 11405
3690 11405 3696 11405 3700 11405 3700 11402
3700 11397
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CO2 follow-up statements
642
WGUS75 KVEF 262155
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
255 PM PDT Mon Jul 26 2021
AZC015-270000-
/O.CON.KVEF.FF.W.0078.000000T0000Z-210727T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
255 PM MST Mon Jul 26 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON FOR NORTH CENTRAL MOHAVE COUNTY...
At 255 PM MST, Heavy rain has begun to diminish across the Arizona
strip but elevated stream flows and areas of flash flooding remain
possible as runoff continues. Continue to heed any road closures.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Littlefield, Virgin River Gorge, Beaver Dam and Virgin River
Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3700 11360 3689 11358 3681 11365 3667 11403
3671 11405 3675 11405 3684 11405 3688 11405
3690 11405 3696 11405 3700 11405 3700 11402
3700 11397
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CO629
WGUS75 KVEF 262357
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
457 PM PDT Mon Jul 26 2021
AZC015-270007-
/O.EXP.KVEF.FF.W.0078.000000T0000Z-210727T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
457 PM MST Mon Jul 26 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON FOR
NORTH CENTRAL 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 3700 11360 3689 11358 3681 11365 3667 11403
3671 11405 3675 11405 3684 11405 3688 11405
3690 11405 3696 11405 3700 11405 3700 11402
3700 11397
$$
BKPThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 5:04 PM MST | Flash Flood Warning | VEF | Mohave | 5 hr |
| Jul 25, 5:06 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 54 min |
| Jul 25, 5:12 PM MST | Dust Storm Warning | VEF | Mohave | 63 min |
| Jul 25, 5:37 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Jul 25, 6:01 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 59 min |
| Jul 25, 7:08 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 52 min |
| Jul 25, 7:57 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 63 min |
| Jul 25, 8:59 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 61 min |
| Jul 25, 10:26 PM MST | Areal Flood Warning | VEF | Mohave | 8 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.