Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 36, NWS Las Vegas, NV

July 14, 2012Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 14, 2012, 10:01 PM MST for Mohave County, Arizona. It was in force for 3 hr. 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 14, 2012, 10:01 PM MST (05:01 UTC)
Expired: Jul 15, 2012, 1:00 AM MST
In force: 3 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), 146 km from the middle of the area, began a volume at 05:04 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, 5.0 hours before the alert went out and 238 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: 48 J/kg
Mixed-layer CIN: -202 J/kg
Mixed-layer LCL: 2462 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: -43 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.

759 
WGUS55 KVEF 150501
FFWVEF
AZC015-150700-
/O.NEW.KVEF.FF.W.0036.120715T0501Z-120715T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1001 PM MST SAT JUL 14 2012

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL MIDNIGHT MST/MIDNIGHT PDT/.

* AT 955 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM NEAR CRAZY HORSE CAMPGROUND...
  OR NEAR LAKE HAVASU CITY. THE STORM PRODUCING VERY HEAVY RAIN WAS
  NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  LAKE HAVASU CITY...CRAZY HORSE CAMPGROUND AND HAVASU FALLS RV
  RESORT.

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 3457 11429 3449 11422 3440 11425 3441 11428
      3444 11431 3445 11434 3445 11436 3445 11437
      3446 11438 3448 11437 3454 11437

$$

JENSEN

4 follow-up statements

495 
WGUS75 KVEF 150609
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1109 PM MST SAT JUL 14 2012

AZC015-150700-
/O.CON.KVEF.FF.W.0036.000000T0000Z-120715T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
1109 PM MST SAT JUL 14 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT
MST/MIDNIGHT PDT/ FOR SOUTHWESTERN MOHAVE COUNTY...

AT 1100 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN OVER THE SOUTHERN 
PARTS OF LAKE HAVASU CITY.  THE THUNDERSTORM WITH EXCESSIVE RAIN WAS 
MOVING NORTHEAST AROUND 10 MPH. AN AUTOMATED GAGE NEAR MCCULLOUCH 
BLVD NORTH AND ACOMA BLVD HAS REPORTED JUST OVER A HALF AN INCH OF 
RAIN SINCE 10 PM. ANOTHER GAGE NEAR LITTLE FINGER RD AND LAKESIDE DR 
REPORTED NEARLY FOUR TENTHS OF AN INCH. 

LOCATIONS IMPACTED INCLUDE...
LAKE HAVASU CITY AND HAVASU FALLS RV RESORT.

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 3457 11429 3449 11422 3440 11425 3441 11428
      3444 11431 3445 11434 3445 11436 3445 11437
      3446 11438 3448 11437 3454 11437

$$

PIERCE

082 
WGUS55 KVEF 150635
FFWVEF
AZC015-150800-
/O.EXT.KVEF.FF.W.0036.000000T0000Z-120715T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1135 PM MST SAT JUL 14 2012

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS EXTENDED THE

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

* UNTIL 100 AM MST/100 AM PDT/.

* AT 1126 PM MST...DUE TO VERY HEAVY RAIN BEING REPORTED FROM A 
THUNDERSTORM NEAR LAKE HAVASU CITY THE FLASH FLOOD WARNING HAS BEEN 
EXTENDED UNTIL 1 AM MST/PDT. THE STORM WAS MOVING EAST-SOUTHEAST
AT 5 TO 10 MPH. AN AUTOMATED MOHAVE COUNTY FLOOD CONTROL DISTRICT 
STATION IN SOUTHEAST LAKE HAVASU CITY...NEAR LITTLE FINGER ROAD AND 
LAKESIDE DRIVE REPORTED AROUND NINE TENTHS OF AN INCH OF RAIN SINCE 
11 PM MST. 

* LOCATIONS IMPACTED INCLUDE...SOUTHEAST LAKE HAVASU CITY...HIGHWAY  
  95...SARA PARK AND DOG PARK.

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.

CAMPERS AND HIKERS SHOULD BE ALERT TO THE POSSIBILITY OF RAPIDLY
RISING WATER AND BE PREPARED TO MOVE QUICKLY TO HIGHER GROUND IF
FLASH FLOODING IS OBSERVED.

&&

LAT...LON 3457 11429 3449 11422 3440 11425 3441 11428
      3444 11431 3445 11434 3445 11436 3445 11437
      3446 11438 3448 11437 3454 11437

$$

PIERCE

342 
WGUS75 KVEF 150706
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1206 AM MST SUN JUL 15 2012

AZC015-150800-
/O.CON.KVEF.FF.W.0036.000000T0000Z-120715T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
1206 AM MST SUN JUL 15 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 AM MST/100 AM
PDT/ FOR SOUTHWESTERN MOHAVE COUNTY...

AT 1201 AM MST...A THUNDERSTORM PRODUCING VERY HEAVY RAIN HAS 
WEAKENED AND SHIFTED EAST OF LAKE HAVASU CITY. RAINFALL RATES HAVE 
DRAMATICALLY DECREASED OVER SOUTHEAST LAKE HAVASU CITY. 
HOWEVER...RUNOFF FROM THE INTENSE DOWNPOUR WILL CONTINUE TO IMPACT 
NORMALLY DRY WASHES...STREETS AND OTHER LOW LYING AREAS THROUGH 1 AM 
MST. 

LOCATIONS IMPACTED INCLUDE...SOUTHEAST LAKE HAVASU CITY...HIGHWAY 
95...SARA PARK AND DOG PARK.

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.

CAMPERS AND HIKERS SHOULD BE ALERT TO THE POSSIBILITY OF RAPIDLY
RISING WATER AND BE PREPARED TO MOVE QUICKLY TO HIGHER GROUND IF
FLASH FLOODING IS OBSERVED.

&&

LAT...LON 3457 11429 3449 11422 3440 11425 3441 11428
      3444 11431 3445 11434 3445 11436 3445 11437
      3446 11438 3448 11437 3454 11437

$$

PIERCE

858 
WGUS75 KVEF 150756
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1256 AM MST SUN JUL 15 2012

AZC015-150800-
/O.EXP.KVEF.FF.W.0036.000000T0000Z-120715T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
1256 AM MST SUN JUL 15 2012

...THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHWESTERN MOHAVE
COUNTY...

RUNOFF FROM HEAVY RAINFALL IN SOUTHEAST LAKE HAVASU CITY LATE 
SATURDAY EVENING HAS DIMINISHED. THE FLASH FLOOD WARNING WILL EXPIRE 
AT 1 AM.

LIGHT TO OCCASIONAL MODERATE PERIODS OF RAIN ARE POSSIBLE YET 
TONIGHT AS RADAR SHOWS SCATTERED SHOWERS AND THUNDERSTORMS WEST OF 
LAKE HAVASU CITY ACROSS EASTERN SAN BERNARDINO COUNTY.  

LAT...LON 3457 11429 3449 11422 3440 11425 3441 11428
      3444 11431 3445 11434 3445 11436 3445 11437
      3446 11438 3448 11437 3454 11437

$$

PIERCE

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 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 15, 4:58 PM MST	Flash Flood Warning	VEF	Mohave	92 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.