Alert archive / California / Areal Flood Advisories in 2021
Areal Flood Advisory 21, NWS Las Vegas, NV
NWS Las Vegas, NV issued this areal flood advisory at Jul 28, 2021, 12:59 PM PDT for San Bernardino County, California. It was in force for 22 min.
The area
The outline as issued.
The facts
- Issued
- Jul 28, 2021, 12:59 PM PDT (19:59 UTC)
- Expired
- Jul 28, 2021, 1:21 PM PDT
- In force
- 22 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
County San Bernardino County, CA
The radar
The Santa Ana Mts radar (KSOX), 133 km from the middle of the area, began a volume at 20:00 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, 8.0 hours before the alert went out and 176 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
- 1533 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
542
WGUS85 KVEF 281959
FLSVEF
Flood Advisory
National Weather Service Las Vegas NV
1259 PM PDT Wed Jul 28 2021
CAC071-282300-
/O.NEW.KVEF.FA.Y.0021.210728T1959Z-210728T2300Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-
1259 PM PDT Wed Jul 28 2021
The National Weather Service in Las Vegas has issued a
* Flood Advisory for...
San Bernardino County in southern California...
* Until 400 PM PDT.
* At 1259 PM PDT, Doppler radar indicated heavy rain due to
thunderstorms south of Joshua Tree. Minor flooding is likely to
begin shortly...Especially along Park Blvd and Indian Cove Roads
south of Highway 62. Additional flooding may impact Highway 62
between Twentynine Palms and Yucca Valley. Between 0.5 and 1 inch
of rain has fallen south of Joshua Tree.
* Some locations that will experience flooding include...
Joshua Tree Lake Campground and Joshua Tree.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3408 11632 3414 11636 3419 11637 3422 11635
3425 11630 3426 11627 3426 11620 3424 11615
3419 11609 3412 11606 3412 11626 3408 11626
$$
CO1 follow-up statement
978
WGUS85 KVEF 282021
FLSVEF
Flood Advisory
National Weather Service Las Vegas NV
121 PM PDT Wed Jul 28 2021
CAC071-282031-
/O.CAN.KVEF.FA.Y.0021.000000T0000Z-210728T2300Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-
121 PM PDT Wed Jul 28 2021
...FLOOD ADVISORY FOR SAN BERNARDINO COUNTY HAS BEEN REPLACED WITH A
FLASH FLOOD WARNING...
LAT...LON 3408 11632 3414 11636 3419 11637 3422 11635
3425 11630 3426 11627 3426 11620 3424 11615
3419 11609 3412 11606 3412 11626 3408 11626
$$
COThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 5:56 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 2 hr |
| Jul 28, 1:21 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
Nearby
Areal Flood Advisories in California, 2021Every areal flood advisory 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; radar from the NEXRAD Level II archive.