Alert archive / California / Flash Flood Warnings in 2020
Flash Flood Warning 4, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Mar 12, 2020, 4:32 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
- Mar 12, 2020, 4:32 PM PDT (23:32 UTC)
- Expired
- Mar 12, 2020, 7:30 PM PDT
- In force
- 3 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County San Bernardino County, CA
The radar
The Edwards AFB radar (KEYX), 85 km from the middle of the area, began a volume at 23:30 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 197 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
- 3 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1191 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
652
WGUS55 KVEF 122332
FFWVEF
CAC071-130230-
/O.NEW.KVEF.FF.W.0004.200312T2332Z-200313T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
432 PM PDT Thu Mar 12 2020
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
West central San Bernardino County in southern California...
* Until 730 PM PDT.
* At 426 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across the Barstow-Daggett area. Law enforcement has
reported water along the Outlet Center Dr and Interstate 15 off-
ramp. Continued moderate to heavy rainfall is expected over the
next few hours. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Life threatening flash flooding. Heavy rain producing
flash flooding.
SOURCE...Radar indicated.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flooding include...
Barstow, Daggett, I-15 Between Victorville And Barstow, Afton
Canyon Campground, Newberry Springs, Owl Canyon Campground, Hwy 247
Between Lucerne Valley And Barstow, Lenwood and Nebo Center.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3471 11645 3474 11642 3481 11736 3518 11734
3519 11633 3470 11635
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
CK2 follow-up statements
578
WGUS75 KVEF 130153
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
653 PM PDT Thu Mar 12 2020
CAC071-130230-
/O.CON.KVEF.FF.W.0004.000000T0000Z-200313T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-
653 PM PDT Thu Mar 12 2020
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM PDT FOR
WEST CENTRAL SAN BERNARDINO COUNTY...
At 649 PM PDT, trained weather spotters reported nearly an inch of
rain has fallen in the past hour. Heavy rain is occurring from
Barstow westward along Highway 58 to the county line. Flash flooding
is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Heavy rain producing flash
flooding.
SOURCE...Trained weather spotters.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flooding include...
Barstow, Daggett, I-15 Between Victorville And Barstow, Afton Canyon
Campground, Newberry Springs, Owl Canyon Campground, Hwy 247 Between
Lucerne Valley And Barstow, Lenwood and Nebo Center.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3471 11645 3474 11642 3481 11736 3518 11734
3519 11633 3470 11635
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
SC410
WGUS75 KVEF 130228
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
728 PM PDT Thu Mar 12 2020
CAC071-130234-
/O.EXP.KVEF.FF.W.0004.000000T0000Z-200313T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-
728 PM PDT Thu Mar 12 2020
...THE FLASH FLOOD WARNING FOR WEST CENTRAL SAN BERNARDINO COUNTY
WILL EXPIRE AT 730 PM PDT...
The heavy rain has moved to the west but continues along Highway 58
from near Hinkley westward to the county line. Flooding is no longer
expected to pose a threat. Please continue to heed any remaining
road closures.
LAT...LON 3471 11645 3474 11642 3481 11736 3518 11734
3519 11633 3470 11635
$$
SCThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 2:54 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Mar 12, 3:26 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Mar 12, 4:07 PM PDT | Flash Flood Warning | VEF | San Bernardino | 4 hr |
Nearby
Flash Flood Warnings in California, 2020Every flash flood warning in 2020
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.