Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 73, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 3, 2017, 2:00 PM PDT for San Bernardino County, California. 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
- Aug 3, 2017, 2:00 PM PDT (21:00 UTC)
- Expired
- Aug 3, 2017, 5:00 PM PDT
- In force
- 3 hr
- 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), 118 km from the middle of the area, began a volume at 21:03 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, 9.0 hours before the alert went out and 168 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
- 527 J/kg
- Mixed-layer CIN
- -342 J/kg
- Mixed-layer LCL
- 1297 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
911
WGUS55 KVEF 032100
FFWVEF
CAC071-040000-
/O.NEW.KVEF.FF.W.0073.170803T2100Z-170804T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
200 PM PDT THU AUG 3 2017
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
South central San Bernardino County in southern California...
* Until 500 PM PDT
* At 159 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding is expected to
begin shortly.
* Some locations that will experience flooding include...
Yucca Valley, Joshua Tree Lake Campground, Joshua Tree and Morongo
Valley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3410 11660 3414 11647 3421 11644 3426 11644
3432 11648 3435 11642 3433 11624 3412 11620
3412 11626 3408 11627 3408 11644 3403 11648
3403 11661
$$
ASG2 follow-up statements
722
WGUS75 KVEF 032234
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
334 PM PDT THU AUG 3 2017
CAC071-040000-
/O.CON.KVEF.FF.W.0073.000000T0000Z-170804T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-
334 PM PDT THU AUG 3 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM PDT FOR
SOUTH CENTRAL SAN BERNARDINO COUNTY...
At 332 PM PDT, Doppler radar indicated thunderstorms west of Morongo
Valley approaching the area. This additional heavy rain will likely
cause additional flooding across the warned area through 500 pm.
Some locations that will experience flooding include...
Yucca Valley, Joshua Tree Lake Campground, Joshua Tree and Morongo
Valley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3410 11660 3414 11647 3421 11644 3426 11644
3432 11648 3435 11642 3433 11624 3412 11620
3412 11626 3408 11627 3408 11644 3403 11648
3403 11661
$$
ASG138
WGUS75 KVEF 032356
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
456 PM PDT THU AUG 3 2017
CAC071-040006-
/O.EXP.KVEF.FF.W.0073.000000T0000Z-170804T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-
456 PM PDT THU AUG 3 2017
...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL SAN BERNARDINO COUNTY
WILL EXPIRE AT 500 PM PDT...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 3410 11660 3414 11647 3421 11644 3426 11644
3432 11648 3435 11642 3433 11624 3412 11620
3412 11626 3408 11627 3408 11644 3403 11648
3403 11661
$$
ASGThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 5:53 PM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Aug 2, 7:19 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 26 min |
| Aug 2, 7:36 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Aug 2, 8:09 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 2, 8:19 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 2, 8:57 PM PDT | Areal Flood Advisory | VEF | Inyo | 3 hr |
| Aug 2, 9:54 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Aug 2, 10:04 PM PDT | Flash Flood Warning | VEF | Inyo, San Bernardino | 3 hr |
| Aug 2, 11:36 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Aug 3, 2:27 AM PDT | Flash Flood Watch | VEF | Inyo, San Bernardino | 21 hr |
| Aug 3, 6:02 AM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 3, 7:41 AM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 3, 8:59 AM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
Nearby
Flash Flood Warnings in California, 2017Every flash flood warning in 2017
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.