Alert archive / California / Flash Flood Warnings in 2018
Flash Flood Warning 7, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 10, 2018, 7:48 PM PDT for San Bernardino County, California. It was in force for 98 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 10, 2018, 7:48 PM PDT (02:48 UTC)
- Expired
- Jul 10, 2018, 9:26 PM PDT
- In force
- 98 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The radar
The Las Vegas radar (KESX), 56 km from the middle of the area, began a volume at 02:52 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 00:00Z, 2.8 hours before the alert went out and 109 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
- 465 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 2502 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
385 WGUS55 KVEF 110248 FFWVEF CAC071-110545- /O.NEW.KVEF.FF.W.0007.180711T0248Z-180711T0545Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Las Vegas NV 748 PM PDT TUE JUL 10 2018 The National Weather Service in Las Vegas has issued a * Flash Flood Warning for... Northeastern San Bernardino County in southern California... * Until 1045 PM PDT. * At 746 PM PDT, Doppler radar indicated thunderstorms producing heavy rain over the northern part of the Mojave National Preserve. The heaviest rain was falling over Morning Star Mine Road, and may also flood the wash which crosses Nipton Road. * Some locations that will experience flooding include... Nipton And Ivanpah Roads. PRECAUTIONARY/PREPAREDNESS ACTIONS... Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, country roads, farmland, and other low lying spots. && LAT...LON 3548 11530 3528 11544 3531 11551 3547 11539 $$ Morgan
2 follow-up statements
815 WGUS75 KVEF 110343 FFSVEF Flash Flood Statement National Weather Service Las Vegas NV 843 PM PDT TUE JUL 10 2018 CAC071-110545- /O.CON.KVEF.FF.W.0007.000000T0000Z-180711T0545Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ San Bernardino CA- 843 PM PDT TUE JUL 10 2018 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM PDT FOR NORTHEASTERN SAN BERNARDINO COUNTY... At 842 PM PDT, Doppler radar indicated that rain had ended over Morning Star Mine Road. However, water is likely still flowing in washes, and may be flowing over Nipton Road. Some locations that will experience flooding include... Nipton And Ivanpah Roads. PRECAUTIONARY/PREPAREDNESS ACTIONS... Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, country roads, farmland, and other low lying spots. && LAT...LON 3548 11530 3528 11544 3531 11551 3547 11539 $$ Morgan
820 WGUS75 KVEF 110426 FFSVEF Flash Flood Statement National Weather Service Las Vegas NV 926 PM PDT TUE JUL 10 2018 CAC071-110436- /O.CAN.KVEF.FF.W.0007.000000T0000Z-180711T0545Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ San Bernardino CA- 926 PM PDT TUE JUL 10 2018 ...THE FLASH FLOOD WARNING FOR NORTHEASTERN SAN BERNARDINO COUNTY IS CANCELLED... The heavy rain has ended over the Mojave Preserve. Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 3548 11530 3528 11544 3531 11551 3547 11539 $$ Morgan
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 11:10 AM PDT | Areal Flood Advisory | VEF | San Bernardino | 64 min |
| Jul 11, 11:45 AM PDT | Flash Flood Watch | VEF | Inyo, San Bernardino | 10 hr |
| Jul 11, 12:03 PM PDT | Flash Flood Warning | VEF | San Bernardino | 5 hr |
| Jul 11, 1:06 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 11, 2:55 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 11, 3:40 PM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Jul 11, 4:11 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
Nearby
Flash Flood Warnings in California, 2018Every flash flood warning in 2018
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.