Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 22, NWS Las Vegas, NV

July 14, 2012Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 14, 2012, 1:28 PM MST for Mohave County, Arizona. It was in force for 4 hr. 2 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 14, 2012, 1:28 PM MST (20:28 UTC)
Expired: Jul 14, 2012, 5:00 PM MST
In force: 4 hr
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Flood severity: None

County Mohave County, AZ

The radar

The Las Vegas radar (KESX), 133 km from the middle of the area, began a volume at 20:29 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
Jul 14, 2:20 PM MST	HEAVY RAIN 2.25	7 N I-40 At Fort Rock, AZ	CO-OP OBSERVER AT DIAMOND M RANCH REPORTED 2.25 INCHES OF RAIN IN 40 MINUTES. THE RAIN WAS HEAVY ENOUGH TO ALLOW WASHES TO OVERFLOW THEIR BANKS.
Jul 14, 2:40 PM MST	FLASH FLOOD	16 S Peach Springs, AZ	CO-OP OBSERVER AT DIAMOND M RANCH REPORTED 2.25 INCHES OF RAIN IN 40 MINUTES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 8.5 hours before the alert went out and 153 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: 69 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 715 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

777 
WGUS55 KVEF 142028
FFWVEF
AZC015-142230-
/O.NEW.KVEF.FF.W.0022.120714T2028Z-120714T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
128 PM MST SAT JUL 14 2012

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 330 PM MST.

* AT 121 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
VERY HEAVY RAIN FROM THUNDERSTORMS NEAR DIAMOND M RANCH OR 36   
MILES EAST OF KINGMAN. THE STORM PRODUCING VERY HEAVY RAIN WAS   
NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  DIAMOND M RANCH AND DIAMOND CREEK CAMPGROUND.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 80 TO THE MOHAVE 
COCONINO COUNTY LINE.

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 3501 11356 3609 11365 3613 11330 3602 11334
      3589 11330 3584 11332 3502 11332

$$

JENSEN

4 follow-up statements

063 
WGUS75 KVEF 142129
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
229 PM MST SAT JUL 14 2012

AZC015-142230-
/O.CON.KVEF.FF.W.0022.000000T0000Z-120714T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
229 PM MST SAT JUL 14 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 PM MST FOR
CENTRAL MOHAVE COUNTY...

AT 217 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING VERY HEAVY RAIN. THE MAIN AREA OF 
STORMS WERE OVER OF JUST TO THE WEST OF DIAMOND CREEK CAMPGROUND...  
OR 50 MILES NORTHEAST OF KINGMAN. THE THUNDERSTORMS WERE SLOWLY 
MOVING TO THE NORTHEAST.

LOCATIONS IMPACTED INCLUDE...
DIAMOND CREEK CAMPGROUND AND DIAMOND M RANCH.

THIS ALSO INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 80 EAST TO THE 
MOHAVE / COCONINO COUNTY LINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES...
AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS
NATURES NUMBER ONE KILLER. 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 3501 11356 3609 11365 3613 11330 3602 11334
      3589 11330 3584 11332 3502 11332

$$

JENSEN

377 
WGUS55 KVEF 142220
FFWVEF
AZC015-150000-
/O.EXT.KVEF.FF.W.0022.000000T0000Z-120715T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
320 PM MST SAT JUL 14 2012

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS EXTENDED THE

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

* UNTIL 500 PM MST.

* AT 313 PM MST...VERY HEAVY RAIN WAS REPORTED FROM A THUNDERSTORM 6
  MILES SOUTH OF DIAMOND CREEK CAMPGROUND...OR 49 MILES NORTHEAST OF
  KINGMAN. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY.
  OTHER THUNDERSTORMS WILL SLOWLY BE MOVING ACROSS THE AREA...
  PRODUCING ADDITIONAL HEAVY RAINFALL.

* LOCATIONS IMPACTED INCLUDE...
  DIAMOND CREEK CAMPGROUND AND DIAMOND M RANCH.

  THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 80 EAST TO THE
  MOHAVE / COCONINO COUNTY LINE.

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 3501 11356 3609 11365 3613 11330 3602 11334
      3589 11330 3584 11332 3502 11332

$$

JENSEN

703 
WGUS75 KVEF 142318
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
418 PM MST SAT JUL 14 2012

AZC015-150000-
/O.CON.KVEF.FF.W.0022.000000T0000Z-120715T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
418 PM MST SAT JUL 14 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM MST FOR
CENTRAL MOHAVE COUNTY...

AT 409 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN.  THIS STORM WAS
LOCATED NEAR DIAMOND M RANCH...OR 38 MILES EAST OF KINGMAN. THE 
THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY STATIONARY.

LOCATIONS IMPACTED INCLUDE...
DIAMOND M RANCH AND DIAMOND CREEK CAMPGROUND.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 80 AND THE MOHAVE / 
COCONINO COUNTY LINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES...
AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS
NATURES NUMBER ONE KILLER. 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 3501 11356 3609 11365 3613 11330 3602 11334
      3589 11330 3584 11332 3502 11332

$$

JENSEN

474 
WGUS75 KVEF 142358
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
458 PM MST SAT JUL 14 2012

AZC015-150006-
/O.EXP.KVEF.FF.W.0022.000000T0000Z-120715T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
458 PM MST SAT JUL 14 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 500 PM MST FOR CENTRAL
MOHAVE COUNTY...

ALTHOUGH LIGHT RAINFALL IS STILL BE INDICATED IN THE AREA...HEAVY 
RAINFALL IS NO LONGER EXPECTED AND THE FLASH FLOOD WARNING WILL BE 
ALLOWED TO EXPIRE AT 5 PM MST FOR THE EXTREME EAST CENTRAL PORTION 
OF MOHAVE COUNTY.

HOWEVER TRAVELERS AND OTHER OUTDOOR ENTHUSIASTS SHOULD USE EXTRA 
CAUTION THROUGH THIS EVENING AS FLOWING WATER IN NORMALLY DRY WASHES 
AND PONDING OF WATER IN LOW LYING AREAS WILL LIKELY BE ENCOUNTERED 
WELL INTO THE EVENING HOURS.

LAT...LON 3501 11356 3609 11365 3613 11330 3602 11334
      3589 11330 3584 11332 3502 11332

$$

JENSEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 5:35 PM MST	Flash Flood Warning	VEF	Mohave	115 min
Jul 14, 2:00 PM MST	Areal Flood Advisory	VEF	Mohave	2 hr
Jul 14, 3:17 PM MST	Flash Flood Warning	VEF	Mohave	118 min
Jul 14, 3:27 PM MST	Flash Flood Warning	VEF	Mohave	5 hr
Jul 14, 4:03 PM MST	Areal Flood Advisory	VEF	Mohave	57 min
Jul 14, 4:38 PM MST	Flash Flood Warning	VEF	Mohave	3 hr
Jul 14, 4:42 PM MST	Flash Flood Warning	VEF	Mohave	3 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.