Alert archive / Arizona / Flash Flood Warnings in 2017

Flash Flood Warning 10, NWS Las Vegas, NV

July 18, 2017Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 18, 2017, 2:18 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 18, 2017, 2:18 PM MST (21:18 UTC)
Expired: Jul 18, 2017, 5:15 PM 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), 118 km from the middle of the area, began a volume at 21:21 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

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 9.3 hours before the alert went out and 176 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: 3 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 1529 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

786 
WGUS55 KVEF 182118
FFWVEF
AZC015-190015-
/O.NEW.KVEF.FF.W.0010.170718T2118Z-170719T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
218 PM MST TUE JUL 18 2017

The National Weather Service in Las Vegas has issued a

* Flash Flood Warning for...
  South central Mohave County in northwestern Arizona...

* Until 515 PM MST

* At 216 PM MST, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

* Some locations that will experience flooding include...
  Kingman, Wild Cow Campground, Dw Ranch Road, New Kingman-Butler,
  Valentine, Diamond Creek Campground, Diamond M Ranch, Blake Ranch 
  Road, Hualapai Mountain Park, Hualapai Peak, areas around Peach 
  Springs, and areas along Interstate 40 between Fort Rock and 
  Kingman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for flooding even in locations not receiving rain.
Arroyos, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.

&&

LAT...LON 3490 11406 3522 11408 3577 11354 3577 11334
      3476 11333

$$

CFS

2 follow-up statements

883 
WGUS75 KVEF 182143
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
243 PM MST TUE JUL 18 2017

AZC015-190015-
/O.CON.KVEF.FF.W.0010.000000T0000Z-170719T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
243 PM MST TUE JUL 18 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR
SOUTH CENTRAL MOHAVE COUNTY...

At 240 PM MST, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. The most intense area of thunderstorms 
exist along a line between Valentine and Seligman, between 
Interstate 40 and Route 66. Flash flooding is expected to begin 
shortly.

Some locations that will experience flooding include...
Kingman, Wild Cow Campground, Dw Ranch Road, New Kingman-Butler,
Valentine, Diamond Creek Campground, Diamond M Ranch, Blake Ranch
Road, Hualapai Mountain Park, Hualapai Peak and Peach Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for flooding even in locations not receiving rain.
Arroyos, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.

&&

LAT...LON 3490 11406 3522 11408 3577 11354 3577 11334
      3476 11333

$$

CFS

159 
WGUS75 KVEF 182209
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
309 PM MST TUE JUL 18 2017

AZC015-190015-
/O.CON.KVEF.FF.W.0010.000000T0000Z-170719T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
309 PM MST TUE JUL 18 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR
SOUTH CENTRAL MOHAVE COUNTY...

At 307 PM MST, Doppler radar and automated rain gauges indicated 
thunderstorms producing heavy rain over the warned area.  The most 
intense thunderstorms are now over Route 66 between Valentine 
and Peach Springs. Flash flooding is expected to begin shortly.

Some locations that will experience flooding include...
Kingman, Wild Cow Campground, Dw Ranch Road, New Kingman-Butler,
Valentine, Diamond Creek Campground, Diamond M Ranch, Blake Ranch 
Road, Hualapai Mountain Park, Hualapai Peak, Peach Springs, Route 
66, and Hackberry Road.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Remain alert for flooding even in locations not receiving rain.
Arroyos, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.

&&

LAT...LON 3490 11406 3522 11408 3577 11354 3577 11334
      3476 11333

$$

CFS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 5:02 PM MST	Flash Flood Warning	VEF	Mohave	3 hr
Jul 17, 6:57 PM MST	Areal Flood Advisory	VEF	Mohave	3 hr
Jul 17, 7:02 PM MST	Areal Flood Advisory	VEF	Mohave	3 hr
Jul 17, 7:19 PM MST	Severe Thunderstorm Warning	VEF	Mohave	56 min
Jul 17, 8:05 PM MST	Areal Flood Advisory	VEF	Mohave	3 hr
Jul 17, 8:09 PM MST	Severe Thunderstorm Warning	VEF	Mohave	35 min
Jul 18, 3:29 AM MST	Flash Flood Watch	VEF	Mohave	41 hr
Jul 18, 1:59 PM MST	Flash Flood Warning	VEF	Mohave	5 hr
Jul 18, 2:57 PM MST	Flash Flood Warning	VEF	Mohave	5 hr
Jul 18, 4:25 PM MST	Severe Thunderstorm Warning	VEF	Mohave	50 min

Nearby

Flash Flood Warnings in Arizona, 2017 Every flash flood warning in 2017

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.