Alert archive / California / Flash Flood Warnings in 2021
Flash Flood Warning 86, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 30, 2021, 3:56 PM PDT for Inyo County, California. It was in force for 5 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
- Jul 30, 2021, 3:56 PM PDT (22:56 UTC)
- Expired
- Jul 30, 2021, 9:00 PM PDT
- In force
- 5 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Inyo County, CA
The radar
The Edwards AFB radar (KEYX), 143 km from the middle of the area, began a volume at 22:56 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 |
|---|---|---|---|
| Jul 30, 4:53 PM PDT | FLASH FLOOD | 10 E Panamint Springs, CA | CHP REPORTS MUD, DIRT AND ROCK SLIDE ON CA-190. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 10.9 hours before the alert went out and 157 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
- 17 J/kg
- Mixed-layer CIN
- -233 J/kg
- Mixed-layer LCL
- 2114 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- -15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
037
WGUS55 KVEF 302256
FFWVEF
CAC027-310200-
/O.NEW.KVEF.FF.W.0086.210730T2256Z-210731T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
356 PM PDT Fri Jul 30 2021
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
South Central Inyo County in south central California...
* Until 700 PM PDT.
* At 356 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain within Death Valley National Park. The storms are
concentrated around Panamint Springs, Towne Pass and the west
slopes of the Panamint Mountains. The storms may build northward
toward Stovepipe Wells. 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...
Stovepipe Wells and Panamint Springs.
Rock and debris may be deposited on Highway 190 around Towne Pass.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3660 11709 3646 11711 3636 11709 3601 11707
3601 11722 3604 11748 3606 11752 3612 11755
3634 11756 3644 11747 3647 11742 3647 11736
3659 11727 3663 11721 3663 11714
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
BKP3 follow-up statements
362
WGUS75 KVEF 302346
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
446 PM PDT Fri Jul 30 2021
CAC027-310200-
/O.CON.KVEF.FF.W.0086.000000T0000Z-210731T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Inyo CA-
446 PM PDT Fri Jul 30 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 7 PM PDT THIS EVENING
FOR SOUTH CENTRAL INYO COUNTY...
At 446 PM PDT, Doppler radar indicated thunderstorms producing heavy
rain within Death Valley National Park. The storms are concentrated
around Panamint Springs, Towne Pass and the west slopes of the
Panamint Mountains. The storms may build northward toward Stovepipe
Wells. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water crossings,
creeks, normally dry washes and roads.
Some locations that will experience flash flooding include...
Stovepipe Wells, Panamint Springs, Highway 190 and Wildrose Road.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3660 11709 3646 11711 3636 11709 3601 11707
3601 11722 3604 11748 3606 11752 3612 11755
3634 11756 3644 11747 3647 11742 3647 11736
3659 11727 3663 11721 3663 11714
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
BKP685
WGUS55 KVEF 310052
FFWVEF
CAC027-310400-
/O.EXT.KVEF.FF.W.0086.000000T0000Z-210731T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
552 PM PDT Fri Jul 30 2021
The National Weather Service in Las Vegas has extended the
* Flash Flood Warning for...
South Central Inyo County in south central California...
* Until 900 PM PDT.
* At 552 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain continue to develop along the western slopes of the
Panamint Mountains in Death Valley National Park. Flash flooding
is ongoing.
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...
Stovepipe Wells, Panamint Springs, Highway 190, Wildrose Road and
Panamint Valley Road.
California Highway Patrol reports that heavy rainfall has brought
rocks and debris across parts of Highway 190.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3660 11709 3646 11711 3636 11709 3601 11707
3601 11722 3604 11748 3606 11752 3612 11755
3634 11756 3644 11747 3647 11742 3647 11736
3659 11727 3663 11721 3663 11714
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
BKP584
WGUS75 KVEF 310359
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
859 PM PDT Fri Jul 30 2021
CAC027-310409-
/O.EXP.KVEF.FF.W.0086.000000T0000Z-210731T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Inyo CA-
859 PM PDT Fri Jul 30 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 9 PM PDT THIS EVENING FOR
SOUTH CENTRAL INYO COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 500 AM PDT Sunday for
portions of northwest Arizona, southeast California and Nevada.
LAT...LON 3660 11709 3646 11711 3636 11709 3601 11707
3601 11722 3604 11748 3606 11752 3612 11755
3634 11756 3644 11747 3647 11742 3647 11736
3659 11727 3663 11721 3663 11714
$$
BKPThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 1:14 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 61 min |
| Jul 30, 2:48 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 30, 2:53 PM PDT | Areal Flood Advisory | VEF | Inyo | 3 hr |
| Jul 30, 4:07 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
Nearby
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.