Alert archive / California / Flash Flood Warnings in 2016
Flash Flood Warning 52, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 1, 2016, 4:51 PM PDT for San Bernardino County, California. It was in force for 3 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
- Aug 1, 2016, 4:51 PM PDT (23:51 UTC)
- Expired
- Aug 1, 2016, 7:45 PM PDT
- In force
- 3 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), 113 km from the middle of the area, began a volume at 23:55 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 |
|---|---|---|---|
| Aug 1, 6:30 PM PDT | FLASH FLOOD | 2 Ne Essex, CA | CA HIGHWAY PATROL REPORTS WATER AND DEBRIS IN ROADWAY AT GOFFS ROAD AND NATIONAL TRAILS HIGHWAY. TIME OF OCCURRENCE UNKNOWN/ESTIMATED. |
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, 11.9 hours before the alert went out and 196 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
- 365 J/kg
- Mixed-layer CIN
- -262 J/kg
- Mixed-layer LCL
- 1839 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
407
WGUS55 KVEF 012351
FFWVEF
CAC071-020245-
/O.NEW.KVEF.FF.W.0052.160801T2351Z-160802T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
451 PM PDT MON AUG 1 2016
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
* UNTIL 745 PM PDT
* AT 448 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN NEAR ESSEX AND WEST OF NEEDLES. FLASH FLOODING IS
EXPECTED TO BEGIN SHORTLY ON PARTS OF ESSEX, GOFFS AND NATIONAL
TRAILS HIGHWAY. FLASH FLOODING IS ALSO POSSIBLE NEAR THE
INTERSECTION OF INTERSTATE 40 AND HIGHWAY 95.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
HIGHWAY 95 AT MILE MARKER 29...NEEDLES...HIGHWAY 95 AND I-40 AND
ESSEX.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED
ROADS. FIND AN ALTERNATE ROUTE.
&&
LAT...LON 3423 11567 3472 11568 3487 11482 3496 11483
3493 11476 3490 11463 3487 11464 3484 11459
3477 11456 3474 11452 3420 11459
$$
BP2 follow-up statements
442
WGUS75 KVEF 020104
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
604 PM PDT MON AUG 1 2016
CAC071-020245-
/O.CON.KVEF.FF.W.0052.000000T0000Z-160802T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
604 PM PDT MON AUG 1 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM PDT FOR
SOUTHEASTERN SAN BERNARDINO COUNTY...
AT 603 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA ARE BEGINNING TO WEAKEN. FLASH
FLOODING OF NORMALLY DRY WASHES WILL CONTINUE.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
HIGHWAY 95 AT MILE MARKER 29...NEEDLES...
HIGHWAY 95 AND I-40 AND ESSEX.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED
ROADS. FIND AN ALTERNATE ROUTE.
&&
LAT...LON 3423 11567 3472 11568 3487 11482 3496 11483
3493 11476 3490 11463 3487 11464 3484 11459
3477 11456 3474 11452 3420 11459
$$
BP527
WGUS75 KVEF 020235
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
735 PM PDT MON AUG 1 2016
CAC071-020245-
/O.EXP.KVEF.FF.W.0052.000000T0000Z-160802T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
735 PM PDT MON AUG 1 2016
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN SAN BERNARDINO COUNTY
WILL EXPIRE AT 745 PM PDT...
THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.
LAT...LON 3423 11567 3472 11568 3487 11482 3496 11483
3493 11476 3490 11463 3487 11464 3484 11459
3477 11456 3474 11452 3420 11459
$$
BPThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 5:37 PM PDT | Areal Flood Advisory | VEF | Inyo | 3 hr |
| Aug 1, 1:54 PM PDT | Areal Flood Advisory | VEF | Inyo, San Bernardino | 3 hr |
| Aug 1, 2:29 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 1, 2:47 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 1, 3:44 PM PDT | Flash Flood Warning | 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.