Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 70, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 3, 2017, 6:02 AM PDT for San Bernardino County, California. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 3, 2017, 6:02 AM PDT (13:02 UTC)
- Expired
- Aug 3, 2017, 9:00 AM 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 Las Vegas radar (KESX), 181 km from the middle of the area, began a volume at 13:04 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 3, 6:45 AM PDT | FLASH FLOOD | 4 Wnw Rice, CA | CALTRANS REPORTS FLOODING AT SALT MINE NEAR MM103 ON CA 62. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Yuma Prvg Ground, AZ (K1Y7), launched 12:00Z, 1.0 hours before the alert went out and 201 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
- 643 J/kg
- Mixed-layer CIN
- -190 J/kg
- Mixed-layer LCL
- 1749 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
536
WGUS55 KVEF 031302
FFWVEF
CAC071-031600-
/O.NEW.KVEF.FF.W.0070.170803T1302Z-170803T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
602 AM PDT THU AUG 3 2017
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Southeastern San Bernardino County in southern California...
* Until 900 AM PDT
* At 600 AM PDT, Doppler radar indicated thunderstorms producing
heavy rain moving north across the Mohave Desert area. Flash
flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Highway 62 and Vidal Junction.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3424 11570 3422 11445 3408 11446 3407 11532
3412 11552 3407 11555 3409 11560 3403 11560
3404 11572
$$
AA1 follow-up statement
525
WGUS75 KVEF 031428
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
728 AM PDT THU AUG 3 2017
CAC071-031600-
/O.CON.KVEF.FF.W.0070.000000T0000Z-170803T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-
728 AM PDT THU AUG 3 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 AM PDT FOR
SOUTHEASTERN SAN BERNARDINO COUNTY...
At 726 AM PDT, Doppler radar continued to indicate thunderstorms
producing heavy rain across the warned area. Flash flooding is
occurring or expected to begin shortly along Highway 62 between
Vidal Junction and Twentynine Palms.
Some locations that will experience flooding include...
Vidal Junction and Highway 62.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3424 11570 3422 11445 3408 11446 3407 11532
3412 11552 3407 11555 3409 11560 3403 11560
3404 11572
$$
BPThe 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, 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 |
| Aug 3, 2:00 PM 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.