Alert archive / California / Flash Flood Warnings in 2021
Flash Flood Warning 9, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 14, 2021, 2:47 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
- Jul 14, 2021, 2:47 PM PDT (21:47 UTC)
- Expired
- Jul 14, 2021, 5:45 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 nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 9.8 hours before the alert went out and 106 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
- 448 J/kg
- Mixed-layer CIN
- -374 J/kg
- Mixed-layer LCL
- 2057 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- 14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
545
WGUS55 KVEF 142147
FFWVEF
CAC071-150045-
/O.NEW.KVEF.FF.W.0009.210714T2147Z-210715T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
247 PM PDT Wed Jul 14 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
San Bernardino County in southern California...
* Until 545 PM PDT.
* At 247 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain along Ivanpah and Nipton Roads. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water
crossings, creeks, normally dry washes and roads.
* Some locations that will experience flash flooding include...
Nipton And Ivanpah Roads.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3545 11553 3545 11548 3547 11543 3550 11535
3545 11530 3532 11537 3534 11553
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
SC2 follow-up statements
275
WGUS75 KVEF 142304
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
404 PM PDT Wed Jul 14 2021
CAC071-150045-
/O.CON.KVEF.FF.W.0009.000000T0000Z-210715T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-
404 PM PDT Wed Jul 14 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM PDT THIS
AFTERNOON FOR SAN BERNARDINO COUNTY...
At 404 PM PDT, Doppler radar indicated that the earlier
thunderstorms have moved to the north toward Interstate 15 near
Primm. However, runoff from the earlier heavy rain is still likely
impacting Ivanpah and Nipton Roads. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Nipton And Ivanpah Roads.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3545 11553 3545 11548 3547 11543 3550 11535
3545 11530 3532 11537 3534 11553
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
SC067
WGUS75 KVEF 150041
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
541 PM PDT Wed Jul 14 2021
CAC071-150051-
/O.EXP.KVEF.FF.W.0009.000000T0000Z-210715T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-
541 PM PDT Wed Jul 14 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 545 PM PDT THIS AFTERNOON FOR
SAN BERNARDINO COUNTY...
The heavy rain has ended and the storm has moved out of the area.
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures, if applicable.
LAT...LON 3545 11553 3545 11548 3547 11543 3550 11535
3545 11530 3532 11537 3534 11553
$$
JVNearby
Flash Flood Warnings in California, 2021Every flash flood warning in 2021
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.