Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 30, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 24, 2017, 4:31 PM PDT for San Bernardino County, California. It was in force for 119 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 24, 2017, 4:31 PM PDT (23:31 UTC)
- Expired
- Jul 24, 2017, 6:30 PM PDT
- In force
- 119 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), 152 km from the middle of the area, began a volume at 23:34 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, 11.5 hours before the alert went out and 183 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
- 1776 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
177
WGUS55 KVEF 242331
FFWVEF
CAC071-250130-
/O.NEW.KVEF.FF.W.0030.170724T2331Z-170725T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
431 PM PDT MON JUL 24 2017
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Southern San Bernardino County in southern California...
* Until 630 PM PDT
* At 430 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain near Twentynine Palms. A spotter reported flooding at
Amboy Road and Utah Trail.
* Some locations that will experience flooding include...
Twentynine Palms, Twentynine Palms Base and Twentynine Palms
Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots. If you encounter a flooded road, turn around and find another
route.
&&
LAT...LON 3407 11600 3408 11604 3410 11604 3411 11605
3412 11605 3412 11620 3431 11620 3431 11585
3403 11586 3403 11600
$$
Morgan1 follow-up statement
827
WGUS75 KVEF 250025
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
525 PM PDT MON JUL 24 2017
CAC071-250035-
/O.CAN.KVEF.FF.W.0030.000000T0000Z-170725T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-
525 PM PDT MON JUL 24 2017
...THE FLASH FLOOD WARNING FOR SOUTHERN SAN BERNARDINO COUNTY IS
CANCELLED...
Heavy rain has ended in the Twentynine Palms area, and flooding is
no longer expected to pose a threat. Please continue to heed any
remaining road closures.
LAT...LON 3407 11600 3408 11604 3410 11604 3411 11605
3412 11605 3412 11620 3431 11620 3431 11585
3403 11586 3403 11600
$$
MorganThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 3:44 AM PDT | Flash Flood Watch | VEF | San Bernardino | 40 hr |
| Jul 24, 12:31 PM PDT | Flash Flood Warning | VEF | Inyo, San Bernardino | 4 hr |
| Jul 24, 2:28 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 24, 4:09 PM PDT | Flash Flood Warning | VEF | Inyo, 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.