Alert archive / California / Flash Flood Warnings in 2016

Flash Flood Warning 27, NWS Las Vegas, NV

July 1, 2016San Bernardino County, California

NWS Las Vegas, NV issued this flash flood warning at Jul 1, 2016, 4:24 PM PDT for San Bernardino County, California. It was in force for 3 hr. 3 reports 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 1, 2016, 4:24 PM PDT (23:24 UTC)
Expired
Jul 1, 2016, 7:30 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 Edwards AFB radar (KEYX), 51 km from the middle of the area, began a volume at 23:27 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

TimeReportWhereRemark
Jul 1, 4:25 PM PDTFLASH FLOOD2 Sw Barstow, CASPOTTER REPORTED 8-12 INCHES OF WATER FLOWING ON RIMROCK RD NEAR AND EAST OF H ST.
Jul 1, 4:45 PM PDTFLASH FLOOD1 Sse Barstow, CASWIFT WATER RESCUE AT CENTER ST AND UPTON DR. TIME APPROXIMATE.
Jul 1, 5:00 PM PDTFLASH FLOOD2 S Barstow, CACALIFORNIA HIGHWAY PATROL REPORTS FLOODING AND DEBRIS ACROSS ALL LANES OF STATE HIGHWAY 247 AT MILE MARKER 77.

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, 11.4 hours before the alert went out and 208 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.

Skew-T log-pSkew-T log-p diagram, Las Vegas, NV at 12:00Z on 2016-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Las Vegas, NV at 12:00Z on 2016-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -79 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2227 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-79 m²/s²
0-3 km storm-relative helicity
-47 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

288 
WGUS55 KVEF 012324
FFWVEF
CAC071-020230-
/O.NEW.KVEF.FF.W.0027.160701T2324Z-160702T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
424 PM PDT FRI JUL 1 2016

THE NATIONAL WEATHER SERVICE IN LAS VEGAS  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...

* UNTIL 730 PM PDT

* AT 423 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA GENERALLY ALONG INTERSTATE 40
  WEST AND EAST OF BARSTOW. FLASH FLOODING IS EXPECTED TO BEGIN
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BARSTOW...DAGGETT...I-15 BETWEEN VICTORVILLE AND BARSTOW...
  HWY 247 BETWEEN LUCERNE VALLEY AND BARSTOW...
  OWL CANYON CAMPGROUND...NEWBERRY SPRINGS...LENWOOD...
  NEBO CENTER AND HELENDALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3481 11746 3522 11740 3515 11638 3474 11645

$$

JH
2 follow-up statements
371 
WGUS75 KVEF 020054
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
554 PM PDT FRI JUL 1 2016

CAC071-020230-
/O.CON.KVEF.FF.W.0027.000000T0000Z-160702T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
554 PM PDT FRI JUL 1 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM PDT FOR
WEST CENTRAL SAN BERNARDINO COUNTY...

AT 553 PM PDT...DOPPLER RADAR INDICATED ANOTHER ROUND OF
THUNDERSTORMS PRODUCING HEAVY RAIN MOVING FROM WEST TO EAST ACROSS
THE WARNED AREA. THE THREAT OF FLASH FLOODING CONTINUES.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BARSTOW...DAGGETT...I-15 BETWEEN VICTORVILLE AND BARSTOW...HWY 247
BETWEEN LUCERNE VALLEY AND BARSTOW...OWL CANYON CAMPGROUND...NEWBERRY
SPRINGS...LENWOOD...NEBO CENTER AND HELENDALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3481 11746 3522 11740 3515 11638 3474 11645

$$

JH
135 
WGUS75 KVEF 020222
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
722 PM PDT FRI JUL 1 2016

CAC071-020231-
/O.EXP.KVEF.FF.W.0027.000000T0000Z-160702T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
722 PM PDT FRI JUL 1 2016

...THE FLASH FLOOD WARNING FOR WEST CENTRAL SAN BERNARDINO COUNTY
WILL EXPIRE AT 730 PM PDT...

THE HEAVY RAIN HAS ENDED. FLOOD WATERS WILL CONTINUE TO RECEDE.
FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO
HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 3481 11746 3522 11740 3515 11638 3474 11645

$$

JH

The office that day

Everything else NWS Las Vegas, NV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 30, 5:48 PM PDTSevere Thunderstorm WarningVEFSan Bernardino42 min
Jun 30, 5:54 PM PDTFlash Flood WarningVEFSan Bernardino6 hr
Jun 30, 6:26 PM PDTSevere Thunderstorm WarningVEFSan Bernardino34 min
Jun 30, 6:59 PM PDTSevere Thunderstorm WarningVEFSan Bernardino31 min
Jun 30, 10:32 PM PDTFlash Flood WarningVEFInyo3 hr
Jun 30, 10:56 PM PDTSevere Thunderstorm WarningVEFInyo64 min
Jun 30, 11:08 PM PDTFlash Flood WarningVEFInyo4 hr
Jun 30, 11:49 PM PDTFlash Flood WarningVEFInyo3 hr
Jul 1, 1:41 AM PDTFlash Flood WarningVEFSan Bernardino3 hr
Jul 1, 2:06 AM PDTFlash Flood WarningVEFSan Bernardino3 hr
Jul 1, 3:36 AM PDTFlash Flood WarningVEFSan Bernardino3 hr
Jul 1, 3:12 PM PDTSevere Thunderstorm WarningVEFSan Bernardino63 min
Jul 1, 3:25 PM PDTAreal Flood AdvisoryVEFSan Bernardino3 hr
Jul 1, 4:05 PM PDTSevere Thunderstorm WarningVEFSan Bernardino55 min
Jul 1, 4:59 PM PDTSevere Thunderstorm WarningVEFSan Bernardino61 min

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.