Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 2, NWS Las Vegas, NV

July 3, 2011Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 3, 2011, 5:43 PM MST for Mohave County, Arizona. It was in force for 45 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 3, 2011, 5:43 PM MST (00:43 UTC)
Expired: Jul 3, 2011, 6:28 PM MST
In force: 45 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), 79 km from the middle of the area, began a volume at 00:44 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 163 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 5387 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 49 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.

889 
WGUS55 KVEF 040043
FFWVEF
AZC015-040245-
/O.NEW.KVEF.FF.W.0002.110704T0043Z-110704T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
543 PM MST SUN JUL 3 2011

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 745 PM MST.

* AT 531 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM 35 MILES SOUTHEAST OF PIERCE
  FERRY AND ANTARES ROADS...OR 15 MILES NORTHEAST OF KINGMAN. ALSO 
  INCLUDED ARE PORTIONS OF ROUTE 66 FROM MILE MARKER 60 TO MILE 
  MARKER 79. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY 
  STATIONARY.

* LOCATIONS IMPACTED INCLUDE...PIERCE FERRY...ANTARES ROADS AND
  PORTION OF ROUTE 66 NORTHEAST OF KINGMAN.

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 TWITTER #NWSVEGAS.

&&

LAT...LON 3574 11434 3586 11406 3559 11379 3527 11370
      3522 11393

$$

JENSEN

1 follow-up statement

649 
WGUS75 KVEF 040128
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
628 PM MST SUN JUL 3 2011

AZC015-040134-
/O.CAN.KVEF.FF.W.0002.000000T0000Z-110704T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
628 PM MST SUN JUL 3 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL MOHAVE
COUNTY...

THUNDERSTORMS IN THE AREA OF ROUTE 66 NORTHWEST TO PIERCE FERRY AND 
ANTARES ROADS HAVE DIMINISHED...WITH HEAVY RAIN FALL NO LONGER 
EXPECTED. THUS THE FLASH FLOOD WARNING HAS BEEN CANCELLED.

ALTHOUGH THE WARNING HAS BEEN CANCELLED...TRAVELERS IN THE AREA 
SHOULD CONTINUE TO USE CAUTION THROUGH THE OVERNIGHT HOURS AS 
PONDING OF WATER IS LIKELY. IN ADDITION NORMALLY DRY WASHES AND LOW 
WATER CROSSING MAY CONTAIN FLOWING WATER THROUGH THE EVENING HOURS.

LAT...LON 3574 11434 3586 11406 3559 11379 3527 11370
      3522 11393

$$

JENSEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 7:06 PM MST	Severe Thunderstorm Warning	VEF	Mohave	54 min
Jul 3, 9:40 PM MST	Flash Flood Warning	VEF	Mohave	80 min
Jul 3, 9:46 PM MST	Areal Flood Advisory	VEF		119 min
Jul 3, 9:59 PM MST	Severe Thunderstorm Warning	VEF	Mohave	46 min
Jul 3, 10:18 PM MST	Severe Thunderstorm Warning	VEF	Mohave	42 min

Nearby

Flash Flood Warnings in Arizona, 2011 Every flash flood warning in 2011

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.