Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 47, NWS Las Vegas, NV

July 15, 2012Mohave County, Arizona; Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Jul 15, 2012, 4:58 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 92 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, 4:58 PM MST (23:58 UTC)
Expired: Jul 15, 2012, 6:30 PM MST
In force: 92 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Flood severity: None

Counties Mohave County, AZ, Clark County, NV

The radar

The Las Vegas radar (KESX), 90 km from the middle of the area, began a volume at 00:00 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 12:00Z, 12.0 hours before the alert went out and 132 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: 335 J/kg
Mixed-layer CIN: -212 J/kg
Mixed-layer LCL: 1353 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: 8 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.

941 
WGUS55 KVEF 152358
FFWVEF
AZC015-NVC003-160130-
/O.NEW.KVEF.FF.W.0047.120715T2358Z-120716T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA...
  EAST CENTRAL CLARK COUNTY IN SOUTHERN NEVADA...

* UNTIL 630 PM MST/630 PM PDT/.

* AT 451 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM THUNDERSTORM NEAR SOUTH COVE...OR 31 MILES
  SOUTHEAST OF OVERTON. THE STORM PRODUCING VERY HEAVY RAIN WAS
  NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  TEMPLE BAR...SOUTH COVE...PIERCE FERRY...MEADVIEW

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 3651 11418 3646 11371 3604 11373 3566 11403
      3586 11445 3621 11431

$$

JENSEN

2 follow-up statements

465 
WGUS75 KVEF 160048
FFSVEF

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

AZC015-NVC003-160130-
/O.CON.KVEF.FF.W.0047.000000T0000Z-120716T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-CLARK NV-
548 PM MST SUN JUL 15 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM MST/630 PM
PDT/ FOR EAST CENTRAL CLARK AND CENTRAL MOHAVE COUNTIES...

AT 539 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING VERY HEAVY RAIN FROM SOUTH OF 
TEMPLE BAR TO NEAR SOUTH COVE. ANOTHER LINE OF THUNDERSTORMS IS FROM 
NEAR PEARCE FERRY ROAD AND ANTARES ROAD NORTH TO THE LAKE. THE 
STRONGEST STORM WAS LOCATED NEAR SOUTH COVE...OR 35 MILES SOUTHEAST 
OF OVERTON. THE THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY 
STATIONARY.

LOCATIONS IMPACTED INCLUDE...
MAINLY RURAL AREAS OF EASTERN CLARK COUNTY...BUT INCLUDES TEMPLE 
BAR...SOUTH COVE...PEARCE FERRY...MEADVIEW.

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 3651 11418 3646 11371 3604 11373 3566 11403
      3586 11445 3621 11431

$$

JENSEN

358 
WGUS75 KVEF 160130
FFSVEF

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

AZC015-NVC003-160139-
/O.EXP.KVEF.FF.W.0047.000000T0000Z-120716T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-CLARK NV-
630 PM MST SUN JUL 15 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 630 PM MST/630 PM PDT/ FOR 
EAST CENTRAL CLARK AND CENTRAL MOHAVE COUNTIES...THE SERIES OF 
STORMS THAT PROMPTED THE WARNING HAVE MOVED OUT OF THE AREA.  
CAUTION IS ADVISED AS THERE COULD STILL BE FLOWING WATER IN WASHES.

LAT...LON 3651 11418 3646 11371 3604 11373 3566 11403
      3586 11445 3621 11431

$$

BORDEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 5:10 PM MST	Flash Flood Warning	VEF	Mohave	3 hr
Jul 14, 5:30 PM MST	Flash Flood Warning	VEF	Mohave	2 hr
Jul 14, 6:36 PM MST	Flash Flood Warning	VEF	Mohave	114 min
Jul 14, 8:20 PM MST	Flash Flood Warning	VEF	Mohave	115 min
Jul 14, 10:01 PM MST	Flash Flood Warning	VEF	Mohave	3 hr
Jul 15, 10:14 AM MST	Flash Flood Watch	VEF	Mohave	11 hr
Jul 15, 12:53 PM MST	Flash Flood Warning	VEF	Mohave	2 hr
Jul 15, 4:40 PM MST	Flash Flood Warning	VEF	Mohave	65 min
Jul 14, 6:02 PM MST	Areal Flood Advisory	VEF	Clark	116 min
Jul 14, 8:41 PM MST	Areal Flood Advisory	VEF	Clark	16 min
Jul 14, 8:56 PM MST	Flash Flood Warning	VEF	Clark	109 min
Jul 15, 10:30 AM MST	Flash Flood Warning	VEF	Lincoln	4 hr
Jul 15, 1:12 PM MST	Flash Flood Warning	VEF	Clark	2 hr
Jul 15, 1:24 PM MST	Flash Flood Warning	VEF	Nye	4 hr
Jul 15, 1:58 PM MST	Flash Flood Warning	VEF	Lincoln	82 min
Jul 15, 2:16 PM MST	Severe Thunderstorm Warning	VEF	Clark	44 min
Jul 15, 2:41 PM MST	Areal Flood Advisory	VEF	Clark	3 hr
Jul 15, 3:01 PM MST	Flash Flood Warning	VEF	Lincoln	6 hr

Nearby

Flash Flood Warnings in Arizona, 2012 Flash Flood Warnings in Nevada, 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.