Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 123, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 30, 2021, 4:30 PM MST for Mohave County, Arizona. It was in force for 100 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
- Aug 30, 2021, 4:30 PM MST (23:30 UTC)
- Expired
- Aug 30, 2021, 6:10 PM MST
- In force
- 100 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), 81 km from the middle of the area, began a volume at 23:33 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, 11.5 hours before the alert went out and 137 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
- 37 J/kg
- Mixed-layer CIN
- -324 J/kg
- Mixed-layer LCL
- 3297 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
371
WGUS55 KVEF 302330
FFWVEF
AZC015-310230-
/O.NEW.KVEF.FF.W.0123.210830T2330Z-210831T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
430 PM PDT Mon Aug 30 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Northwestern Mohave County in northwestern Arizona...
* Until 730 PM MST.
* At 430 PM MST, Doppler radar indicated thunderstorms producing
heavy rain over the Meadview 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...
Meadview.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
&&
LAT...LON 3605 11411 3605 11403 3594 11403 3595 11412
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CM1 follow-up statement
050 WGUS75 KVEF 310110 FFSVEF Flash Flood Statement National Weather Service Las Vegas NV 610 PM PDT Mon Aug 30 2021 AZC015-310120- /O.CAN.KVEF.FF.W.0123.000000T0000Z-210831T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Mohave AZ- 610 PM MST Mon Aug 30 2021 ...FLASH FLOOD WARNING IS CANCELLED FOR MEADVIEW IN NORTHWESTERN MOHAVE COUNTY... The heavy rain that occurred around Meadview earlier this afternoon has not resulted in any flooding impacts and the Flash Flood Warning has been cancelled. LAT...LON 3605 11411 3605 11403 3594 11403 3595 11412 $$ JA
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 5:42 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 48 min |
| Aug 30, 3:28 AM MST | Flash Flood Watch | VEF | Mohave | 59 hr |
| Aug 30, 4:35 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.