Alert archive / California / Flash Flood Warnings in 2014

Flash Flood Warning 22, NWS Las Vegas, NV

July 8, 2014San Bernardino County, California; Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 8, 2014, 7:03 PM PDT for San Bernardino County, California; Mohave County, Arizona. 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 8, 2014, 7:03 PM PDT (02:03 UTC)
Expired
Jul 8, 2014, 10:00 PM PDT
In force
3 hr
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Flood severity
None

Counties Mohave County, AZ, San Bernardino County, CA

The radar

The Las Vegas radar (KESX), 92 km from the middle of the area, began a volume at 02:05 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 8, 7:30 PM PDTFLASH FLOOD3 Sw Kingman, AZARIZONA DOT REPORTS INTERSTATE 40 FRONTAGE ROAD BETWEEN MILE MARKER 47 AND 48 IS CLOSED DUE A ROCKSLIDE. INTERSTATE 40 WAS NOT IMPACTED BY THIS SLIDE.
Jul 8, 7:42 PM PDTFLASH FLOOD4 Nnw Topock, AZSPOTTER REPORTS WATER AT LEAST A FOOT DEEP RUNNING DOWN THE STREETS IN TOPOCK.
Jul 8, 8:30 PM PDTFLASH FLOOD6 Nnw Topock, AZMUD WASHED ONTO HIGHWAY 1 RESULTING IN THE ROAD BEING CLOSED. THE EVENT TIME IS AN ESTIMATE.

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 00:00Z, 2.1 hours before the alert went out and 187 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 00:00Z on 2014-07-09Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Las Vegas, NV at 00:00Z on 2014-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.1939Sfc1 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
3162 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
123 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

933 
WGUS55 KVEF 090203
FFWVEF
AZC015-CAC071-090500-
/O.NEW.KVEF.FF.W.0022.140709T0203Z-140709T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
703 PM MST TUE JUL 8 2014

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN MOHAVE COUNTY IN NORTHWEST ARIZONA...
  EXTREME EAST CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN
  CALIFORNIA...

* UNTIL 1000 PM MST/1000 PM PDT/

* AT 701 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM 8 MILES EAST OF OATMAN...OR 10
  MILES NORTHWEST OF YUCCA. THE STORM PRODUCING FLASH FLOODING WAS
  NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  OATMAN AND GOLDEN VALLEY.

THIS INCLUDES INTERSTATE 40 IN CALIFORNIA BETWEEN MILE MARKERS 144
AND 155.

THIS INCLUDES INTERSTATE 40 IN ARIZONA BETWEEN MILE MARKERS 0 AND 47.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
ROADS. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO
CROSS A FLOODED ROAD OR ENTER A FLOOD CHANNEL. TURN AROUND...DONT
DROWN!

REPORT FLOODING TO THE LAS VEGAS NATIONAL WEATHER SERVICE VIA
FACEBOOK OR TWITTER.

&&

LAT...LON 3483 11461 3526 11451 3534 11434 3535 11413
      3492 11394 3468 11428 3468 11456

$$

BERC
2 follow-up statements
281 
WGUS75 KVEF 090326
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
826 PM MST TUE JUL 8 2014

AZC015-CAC071-090500-
/O.CON.KVEF.FF.W.0022.000000T0000Z-140709T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-SAN BERNARDINO CA-
826 PM MST TUE JUL 8 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM MST/1000 PM
PDT/ FOR EXTREME EAST CENTRAL SAN BERNARDINO AND SOUTHWESTERN MOHAVE
COUNTIES...

AT 821 PM MST...LIGHT TO MODERATE RAIN CONTINUES ACROSS THE WARNED 
AREA. RADAR ESTIMATES OF ONE TO TWO INCHES OR MORE OF RAINFALL FELL 
ACROSS MUCH OF THE REGION EARLIER THIS EVENING. FLASH FLOODING HAS 
BEEN REPORTED IN THE TOPOCK...OATMAN AND GOLDEN SHORES AREAS AND 
WILL GRADUALLY DIMINISH IN THE NEXT COUPLE HOURS.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
ROADS. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO
CROSS A FLOODED ROAD OR ENTER A FLOOD CHANNEL. TURN AROUND...DONT
DROWN!

REPORT FLOODING TO THE LAS VEGAS NATIONAL WEATHER SERVICE VIA
FACEBOOK OR TWITTER.

&&

LAT...LON 3483 11461 3526 11451 3534 11434 3535 11413
      3492 11394 3468 11428 3468 11456

$$

OUTLER
433 
WGUS75 KVEF 090451
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
951 PM MST TUE JUL 8 2014

AZC015-CAC071-090500-
/O.EXP.KVEF.FF.W.0022.000000T0000Z-140709T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-SAN BERNARDINO CA-
951 PM MST TUE JUL 8 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1000 PM MST/1000 PM PDT/
FOR EXTREME EAST CENTRAL SAN BERNARDINO AND SOUTHWESTERN MOHAVE
COUNTIES...

LIGHT TO MODERATE RAIN CONTINUES ACROSS THE AREA BUT WILL DIMINISH 
THIS EVENING. RUNOFF WILL CONTINUE THROUGH LATE TONIGHT.

LAT...LON 3483 11461 3526 11451 3534 11434 3535 11413
      3492 11394 3468 11428 3468 11456

$$

OUTLER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 5:06 PM PDTAreal Flood AdvisoryVEFSan Bernardino3 hr
Jul 8, 5:51 PM PDTSevere Thunderstorm WarningVEFSan Bernardino39 min
Jul 8, 6:06 PM PDTFlash Flood WarningVEFSan Bernardino4 hr
Jul 8, 6:20 PM PDTFlash Flood WarningVEFSan Bernardino3 hr
Jul 8, 6:27 PM PDTSevere Thunderstorm WarningVEFSan Bernardino48 min
Jul 8, 11:43 PM PDTAreal Flood AdvisoryVEFSan Bernardino3 hr
Jul 9, 4:43 PM PDTSevere Thunderstorm WarningVEFSan Bernardino47 min
Jul 8, 6:12 PM PDTFlash Flood WarningVEFMohave3 hr

Nearby

Flash Flood Warnings in California, 2014Flash Flood Warnings in Arizona, 2014Every flash flood warning in 2014

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.