Alert archive / California / Flash Flood Warnings in 2016
Flash Flood Warning 77, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 4, 2016, 2:24 AM PDT for San Bernardino County, California. It was in force for 2 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
- Aug 4, 2016, 2:24 AM PDT (09:24 UTC)
- Expired
- Aug 4, 2016, 4:30 AM PDT
- In force
- 2 hr
- 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), 64 km from the middle of the area, began a volume at 09:25 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, 9.4 hours before the alert went out and 141 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
- 1079 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 2895 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -36 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
849
WGUS55 KVEF 040925
FFWVEF
CAC071-041130-
/O.NEW.KVEF.FF.W.0077.160804T0924Z-160804T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
224 AM PDT THU AUG 4 2016
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
* UNTIL 430 AM PDT
* AT 224 AM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE MOJAVE NATIONAL PRESERVE AND EXTENDING
SOUTHEAST TO HIGHWAY 95 AND NEEDLES HIGHWAY. FLASH FLOODING IS
EXPECTED TO BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CIMA...NEEDLES AND HIGHWAY 95 AND I-40.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING
SPOTS.
&&
LAT...LON 3522 11557 3542 11547 3547 11522 3500 11463
3489 11463 3487 11483
$$
MORGAN2 follow-up statements
050
WGUS75 KVEF 041032
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
332 AM PDT THU AUG 4 2016
CAC071-041130-
/O.CON.KVEF.FF.W.0077.000000T0000Z-160804T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
332 AM PDT THU AUG 4 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM PDT FOR
NORTHEASTERN SAN BERNARDINO COUNTY...
AT 329 AM PDT...DOPPLER RADAR INDICATED THAT THE HEAVY RAIN HAD
MOVED SOUTHEAST OF MUCH OF THE MOJAVE PRESERVE, WITH THE HEAVIEST
RAIN FALLING ALONG INTERSTATE 40 AND NATIONAL TRAILS HIGHWAY.
HOWEVER, VERY HEAVY RAIN FELL EARLIER FROM MOUNTAIN PASS TO MORNING
STAR MINE ROAD, AND FLASH FLOODING IS LIKELY OCCURRING THERE.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CIMA...NEEDLES AND HIGHWAY 95 AND I-40.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING
SPOTS.
&&
LAT...LON 3522 11557 3542 11547 3547 11522 3500 11463
3489 11463 3487 11483
$$
MORGAN777
WGUS75 KVEF 041125
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
425 AM PDT THU AUG 4 2016
CAC071-041133-
/O.EXP.KVEF.FF.W.0077.000000T0000Z-160804T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
425 AM PDT THU AUG 4 2016
...THE FLASH FLOOD WARNING FOR NORTHEASTERN SAN BERNARDINO COUNTY
WILL EXPIRE AT 430 AM PDT...
THE HEAVY RAIN HAS ENDED OVER THE MOJAVE NATIONAL PRESERVE, AND ONLY
LIGHT RAIN WAS STILL FALLING NEAR THE INTERSECTION OF INTERSTATE 40
AND HIGHWAY 95. FLOODING IS NO LONGER EXPECTED TO POSE A THREAT.
PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES, ESPECIALLY IN
THE MOJAVE PRESERVE WHERE VERY HEAVY RAIN FELL ON NIPTON ROAD AND
MORNING STAR MINE ROAD.
LAT...LON 3522 11557 3542 11547 3547 11522 3500 11463
3489 11463 3487 11483
$$
MORGANThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 6:20 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 3, 8:40 PM PDT | Flash Flood Warning | VEF | San Bernardino | 6 hr |
| Aug 4, 12:37 AM PDT | Flash Flood Warning | VEF | San Bernardino | 113 min |
| Aug 4, 1:49 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 4, 3:25 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 4, 4:39 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 5 hr |
| Aug 4, 4:42 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
Nearby
Flash Flood Warnings in California, 2016Every flash flood warning in 2016
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.