Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 20, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 18, 2021, 2:51 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 18, 2021, 2:51 PM MST (21:51 UTC)
- Expired
- Jul 18, 2021, 6:00 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), 145 km from the middle of the area, began a volume at 21:55 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, 9.9 hours before the alert went out and 175 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
- 191 J/kg
- Mixed-layer CIN
- -101 J/kg
- Mixed-layer LCL
- 1511 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
674
WGUS55 KVEF 182151
FFWVEF
AZC015-190100-
/O.NEW.KVEF.FF.W.0020.210718T2151Z-210719T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
251 PM PDT Sun Jul 18 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Northeastern Mohave County in northwestern Arizona...
* Until 600 PM MST.
* At 251 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...
Bar Ten Ranch, Mt. Trumbull, Toroweap Campground and Tuweep.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3613 11320 3607 11338 3611 11367 3620 11403
3679 11404 3697 11357 3667 11270 3632 11272
3632 11276 3628 11279 3628 11287 3626 11289
3624 11302 3617 11313 3615 11320
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JV2 follow-up statements
415
WGUS75 KVEF 182313
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
413 PM PDT Sun Jul 18 2021
AZC015-190100-
/O.CON.KVEF.FF.W.0020.000000T0000Z-210719T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
413 PM MST Sun Jul 18 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS EVENING
FOR NORTHEASTERN MOHAVE COUNTY...
At 413 PM MST, Doppler radar indicated thunderstorms producing heavy
rain continue across the warned area, particularly along Grand
Canyon West. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Bar Ten Ranch, Mt. Trumbull, Toroweap Campground and Tuweep.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3613 11320 3607 11338 3611 11367 3620 11403
3679 11404 3697 11357 3667 11270 3632 11272
3632 11276 3628 11279 3628 11287 3626 11289
3624 11302 3617 11313 3615 11320
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JV371
WGUS75 KVEF 190054
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
554 PM PDT Sun Jul 18 2021
AZC015-190104-
/O.EXP.KVEF.FF.W.0020.000000T0000Z-210719T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
554 PM MST Sun Jul 18 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 6 PM MST THIS EVENING FOR
NORTHEASTERN MOHAVE COUNTY...
The heavy rain has ended. Minor road flooding and road ponding
possible over the next hour. Please continue to heed road closures,
if applicable.
LAT...LON 3613 11320 3607 11338 3611 11367 3620 11403
3679 11404 3697 11357 3667 11270 3632 11272
3632 11276 3628 11279 3628 11287 3626 11289
3624 11302 3617 11313 3615 11320
$$
JVThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 5:33 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 57 min |
| Jul 18, 1:33 PM MST | Areal Flood Advisory | VEF | Mohave | 80 min |
| Jul 18, 3:07 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 23 min |
| Jul 18, 3:14 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Jul 18, 3:46 PM MST | Flash Flood Warning | VEF | Mohave | 2 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.