Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 48, NWS Las Vegas, NV

July 15, 2012Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 15, 2012, 5:42 PM MST for Mohave County, Arizona. It was in force for 93 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 15, 2012, 5:42 PM MST (00:42 UTC)
Expired: Jul 15, 2012, 7:15 PM MST
In force: 93 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Flood severity: None

County Mohave County, AZ

The radar

The Las Vegas radar (KESX), 138 km from the middle of the area, began a volume at 00:43 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, 0.7 hours before the alert went out and 146 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 91 J/kg
Mixed-layer CIN: -189 J/kg
Mixed-layer LCL: 2314 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -62 m²/s²
0-3 km storm-relative helicity: -3 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.

652 
WGUS55 KVEF 160042
FFWVEF
AZC015-160215-
/O.NEW.KVEF.FF.W.0048.120716T0042Z-120716T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
542 PM MST SUN JUL 15 2012

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA...

* UNTIL 715 PM MST.

* AT 534 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM OVER NORTH CENTRAL MOHAVE
  COUNTY...OR 12 MILES SOUTH OF MESQUITE. THE STORM PRODUCING VERY
  HEAVY RAIN WAS NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF NORTHERN MOHAVE COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!

REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...
NWSVEGAS.

&&

LAT...LON 3648 11387 3650 11404 3682 11405 3683 11400
      3686 11396 3685 11390

$$

JENSEN

2 follow-up statements

985 
WGUS75 KVEF 160127
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
627 PM MST SUN JUL 15 2012

AZC015-160215-
/O.CON.KVEF.FF.W.0048.000000T0000Z-120716T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
627 PM MST SUN JUL 15 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM MST FOR NORTH
CENTRAL MOHAVE COUNTY...

AT 622 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN.  THIS STORM WAS
LOCATED OVER NORTH CENTRAL MOHAVE COUNTY...OR 11 MILES EAST OF 
MESQUITE...MOVING NORTHEAST AT 15 MPH.  THIS STORM IS DECREASING IN 
INTENSITY BUT FLASH FLOODING IS STILL POSSIBLE IN AREA WASHES AND 
LOW LYING LOCATIONS.

LOCATIONS IMPACTED INCLUDE...

LAT...LON 3648 11387 3650 11404 3682 11405 3683 11400
      3686 11396 3685 11390

$$

BORDEN

238 
WGUS75 KVEF 160218
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
718 PM MST SUN JUL 15 2012

AZC015-160226-
/O.EXP.KVEF.FF.W.0048.000000T0000Z-120716T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
718 PM MST SUN JUL 15 2012

...THE FLASH FLOOD WARNING HAS EXPIRED FOR NORTH CENTRAL MOHAVE 
COUNTY...THE THUNDERSTORMS THAT PROMPTED THIS WARNING HAVE MOVED 
AWAY FROM THE AREA.  THE HEAVY RAINFALL HAS ENDED BUT CAUTION IS 
STILL ADVISED AS THERE COULD STILL BE SOME WATER FLOWING THROUGH 
AREA WASHES.

LAT...LON 3648 11387 3650 11404 3682 11405 3683 11400
      3686 11396 3685 11390

$$

BORDEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 7:12 PM MST	Severe Thunderstorm Warning	VEF	Mohave	22 min
Jul 16, 2:00 AM MST	Flash Flood Watch	VEF	Mohave	19 hr
Jul 16, 11:53 AM MST	Flash Flood Warning	VEF	Mohave	3 hr
Jul 16, 1:56 PM MST	Severe Thunderstorm Warning	VEF	Mohave	27 min
Jul 16, 2:22 PM MST	Severe Thunderstorm Warning	VEF	Mohave	23 min
Jul 16, 3:03 PM MST	Flash Flood Warning	VEF	Mohave	60 min
Jul 16, 3:36 PM MST	Severe Thunderstorm Warning	VEF	Mohave	39 min

Nearby

Flash Flood Warnings in Arizona, 2012 Every flash flood warning in 2012

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.