Alert archive / California / Flash Flood Warnings in 2018
Flash Flood Warning 21, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 12, 2018, 11:15 AM PDT for San Bernardino County, California. It was in force for 53 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 12, 2018, 11:15 AM PDT (18:15 UTC)
- Expired
- Jul 12, 2018, 12:08 PM PDT
- In force
- 53 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The radar
The Santa Ana Mts radar (KSOX), 146 km from the middle of the area, began a volume at 18:16 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
San Diego, CA (KNKX), launched 12:00Z, 6.3 hours before the alert went out and 178 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1276 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
768
WGUS55 KVEF 121815
FFWVEF
CAC071-122115-
/O.NEW.KVEF.FF.W.0021.180712T1815Z-180712T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
1115 AM PDT THU JUL 12 2018
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Southern San Bernardino County in southern California...
* Until 215 PM PDT.
* At 1114 AM PDT, Doppler radar indicated thunderstorms producing
heavy rain across Highway 62 between Joshua Tree and 29 Palms.
Flash flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Twentynine Palms, Twentynine Palms Base, Joshua Tree Lake
Campground and Joshua Tree.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3407 11600 3408 11604 3410 11604 3411 11605
3412 11605 3412 11626 3408 11626 3408 11631
3426 11631 3426 11596 3403 11596 3404 11600
$$
Morgan1 follow-up statement
960
WGUS75 KVEF 121908
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
1208 PM PDT THU JUL 12 2018
CAC071-121918-
/O.CAN.KVEF.FF.W.0021.000000T0000Z-180712T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-
1208 PM PDT THU JUL 12 2018
...THE FLASH FLOOD WARNING FOR SOUTHERN SAN BERNARDINO COUNTY IS
CANCELLED...
The thunderstorm over Highway 62 dissipated quickly, and flooding is
no longer expected to pose a threat. Please continue to heed any
remaining road closures.
LAT...LON 3407 11600 3408 11604 3410 11604 3411 11605
3412 11605 3412 11626 3408 11626 3408 11631
3426 11631 3426 11596 3403 11596 3404 11600
$$
MorganThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 7:21 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Jul 12, 2:51 AM PDT | Flash Flood Watch | VEF | Inyo | 21 hr |
| Jul 12, 11:26 AM PDT | Flash Flood Warning | VEF | San Bernardino | 65 min |
| Jul 12, 12:48 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 12, 1:50 PM PDT | Flash Flood Warning | VEF | San Bernardino | 110 min |
| Jul 12, 2:04 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 12, 3:02 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 12, 3:03 PM PDT | Flash Flood Warning | VEF | San Bernardino | 104 min |
| Jul 12, 4:20 PM PDT | Flash Flood Warning | VEF | San Bernardino | 88 min |
| Jul 12, 4:51 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 12, 4:56 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
Nearby
Flash Flood Warnings in California, 2018Every flash flood warning in 2018
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.