Alert archive / Arizona / Flash Flood Warnings in 2008

Flash Flood Warning 3, NWS Las Vegas, NV

July 10, 2008Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 10, 2008, 6:28 PM MST for Mohave County, Arizona. It was in force for 98 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 10, 2008, 6:28 PM MST (01:28 UTC)
Expired: Jul 10, 2008, 8:06 PM MST
In force: 98 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), 83 km from the middle of the area, began a volume at 01:28 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

Mercury/Desert R, NV (KDRA), launched 00:00Z, 1.5 hours before the alert went out and 226 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: 6182 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 10 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.

000 
WGUS55 KVEF 110128
FFWVEF
AZC015-110330-
/O.NEW.KVEF.FF.W.0003.080711T0128Z-080711T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
628 PM MST THU JUL 10 2008

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 830 PM MST.

* AT 620 PM MST...TRAINED WEATHER SPOTTERS REPORTED VERY HEAVY RAIN
  FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IMPACTED INCLUDE...GOLDEN VALLEY AND OATMAN.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES...
DRAINAGE AREAS...HIGHWAYS...STREETS AND LOW WATER CROSSINGS. WHEN YOU
APPROACH FLOOD WATERS...TURN AROUND...DONT DROWN.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROADWAY.
THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY.
TURN AROUND...DONT DROWN.

LAT...LON 3524 11445 3527 11412 3495 11410 3490 11443

$$

JENSEN

1 follow-up statement

000
WGUS75 KVEF 110306
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
804 PM PDT THU JUL 10 2008

AZC015-110314-
/O.CAN.KVEF.FF.W.0003.000000T0000Z-080711T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
804 PM MST THU JUL 10 2008

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

THE STRONG THUNDERSTORMS OF EARLY EVENING HAVE MOVED TO THE WEST OF 
THE AREA AND ALTHOUGH LIGHT RAIN MAY BE SEEN THIS EVENING...HEAVY 
RAINFALL IS NO LONGER EXPECTED. THUS THE FLASH FLOOD WARNING HAS 
BEEN CANCELLED.

HOWEVER...PEOPLE IN AND AROUND THE GOLDEN VALLEY / OATMAN AREA 
SHOULD CONTINUE TO USE CAUTION THROUGH THE REMAINDER OF THE EVENING 
AS WATER WILL LIKELY BE FLOWING THROUGH NORMALLY DRY WASHES AND 
ACROSS DIPS IN THE ROADWAYS. 

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MST
THURSDAY EVENING FOR NORTHWEST ARIZONA AND SOUTHEAST CALIFORNIA AND
SOUTHERN NEVADA.

LAT...LON 3524 11445 3527 11412 3495 11410 3490 11443

$$

JENSEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 5:03 PM MST	Flash Flood Warning	VEF	Mohave	102 min
Jul 10, 5:09 PM MST	Severe Thunderstorm Warning	VEF	Mohave	66 min
Jul 10, 5:29 PM MST	Severe Thunderstorm Warning	VEF	Mohave	46 min
Jul 10, 5:48 PM MST	Flash Flood Warning	VEF	Mohave	2 hr
Jul 10, 6:17 PM MST	Severe Thunderstorm Warning	VEF	Mohave	43 min
Jul 10, 6:56 PM MST	Areal Flood Advisory	VEF	Mohave	68 min

Nearby

Flash Flood Warnings in Arizona, 2008 Every flash flood warning in 2008

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.