Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 165, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 22, 2012, 3:43 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 2 hr. 1 report 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
- Aug 22, 2012, 3:43 PM MST (22:43 UTC)
- Expired
- Aug 22, 2012, 5:45 PM MST
- In force
- 2 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
Counties Mohave County, AZ, Clark County, NV
The radar
The Las Vegas radar (KESX), 43 km from the middle of the area, began a volume at 22:43 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 |
|---|---|---|---|
| Aug 22, 4:00 PM MST | FLASH FLOOD | 2 N Valley Of Fire Stat, NV | WHITE DOME ROAD WAS UNDERCUT AND MOST OF IT WAS COMPLETELY WASHED OUT. MUD AND DEBRIS WAS OBSERVED OVER ROADS AT 10 DIFFERENT SPOTS WITHIN VALLEY OF FIRE STATE PARK. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 10.7 hours before the alert went out and 75 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.
- Mixed-layer CAPE
- 296 J/kg
- Mixed-layer CIN
- -130 J/kg
- Mixed-layer LCL
- 1290 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 176 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.4
The text
As transmitted, in the capitals the NWS used until 2016.
231
WGUS55 KVEF 222243
FFWVEF
AZC015-NVC003-230045-
/O.NEW.KVEF.FF.W.0165.120822T2243Z-120823T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
343 PM PDT WED AUG 22 2012
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EXTREME WEST CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA...
CENTRAL CLARK COUNTY IN SOUTHERN NEVADA...
* UNTIL 545 PM PDT/545 PM MST/.
* AT 338 PM MST...ALTHOUGH RAIN HAS RECENTLY DECREASED OVER THE PAST
HOUR NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES ADDITIONAL
STORMS MOVING EAST AND SOUTH OF THE LAS VEGAS VALLEY FROM SLOAN TO
WILLOW BEACH AND NORTH TO THE VALLEY OF FIRE STATE PARK...EXTENDING
EAST TO OVERTON BEACH. THESE ADDITIONAL STORMS WILL RESULT IN
CONTINUED FLASH FLOODING OVER THE WARNED AREA. THIS NEW WARNING IS A
CONTINUATION OF THE WARNING PREVIOUSLY IN EFFECT.
LOCATIONS IMPACTED INCLUDE...BOULDER CITY...LAS VEGAS
BAY...OVERTON...CALLVILLE BAY...CALLVILLE BAY CAMPGROUND...LAS VEGAS
BAY CAMPGROUND...ECHO BAY CAMPGROUND...ECHO BAY...VALLEY OF FIRE
STATE PARK...VALLEY OF FIRE AND OVERTON BEACH.
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.
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 3590 11514 3596 11491 3654 11489 3654 11425
3614 11426 3584 11456 3583 11515
$$
KENNEDY2 follow-up statements
788
WGUS75 KVEF 222356
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
456 PM PDT WED AUG 22 2012
AZC015-NVC003-230045-
/O.CON.KVEF.FF.W.0165.000000T0000Z-120823T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-CLARK NV-
456 PM PDT WED AUG 22 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM PDT/545 PM
MST/ FOR CENTRAL CLARK AND EXTREME WEST CENTRAL MOHAVE COUNTIES...
AT 445 PM MST...LIGHT TO MODERATE RAIN WILL CONTINUE TO FALL EAST
AND SOUTH OF THE LAS VEGAS VALLEY FROM SLOAN TO WILLOW BEACH AND
NORTH TO THE VALLEY OF FIRE STATE PARK...EXTENDING EAST TO OVERTON
BEACH. THIS RAINFALL IN ADDITION TO THE SIGNIFICANT AMOUNTS THAT
HAVE ALREADY FALLEN WILL RESULT IN CONTINUED FLASH FLOODING OVER THE
WARNED AREA.
MULTIPLE STREETS IN BOULDER CITY ARE CLOSED DUE TO WATER
AND DEBRIS...AND NATIONAL PARK SERVICE EMPLOYEES HAVE REPORTED
MULTIPLE ROADS INSIDE VALLEY OF FIRE STATE PARK ARE CLOSED DUE TO
FLOODING AND 6 TO 8 INCHES OF WATER RUNNING ACROSS NORTHSHORE ROAD
AT MILE MARKER 7.
LOCATIONS IMPACTED INCLUDE...BOULDER CITY...LAS VEGAS
BAY...OVERTON...CALLVILLE BAY...CALLVILLE BAY CAMPGROUND...LAS VEGAS
BAY CAMPGROUND...ECHO BAY CAMPGROUND...ECHO BAY...VALLEY OF FIRE
STATE PARK...VALLEY OF FIRE AND OVERTON BEACH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...
NWSVEGAS.
&&
LAT...LON 3590 11514 3596 11491 3654 11489 3654 11425
3614 11426 3584 11456 3583 11515
$$
KENNEDY184
WGUS75 KVEF 230041
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
541 PM PDT WED AUG 22 2012
AZC015-NVC003-230047-
/O.EXP.KVEF.FF.W.0165.000000T0000Z-120823T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-CLARK NV-
541 PM PDT WED AUG 22 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 545 PM PDT/545 PM MST/ FOR
CENTRAL CLARK AND EXTREME WEST CENTRAL MOHAVE COUNTIES...
WHILE ADDITIONAL RAINFALL IS LIKELY THE REMAINDER OF THE DAY AND
OVERNIGHT EAST AND SOUTH OF THE LAS VEGAS VALLEY FROM BOULDER CITY
AND WILLOW BEACH NORTH TO VALLEY OF FIRE STATE PARK. THE THREAT OF
SIGNIFICANT ADDITIONAL RAINFALL HAS ENDED...AND THE FLASH FLOOD
WARNING WILL BE ALLOWED TO EXPIRE.
IT WILL LIKELY BE SEVERAL HOURS BEFORE RUNNING WATER IN WASHES BEGIN
TO RECEDE...AND ROADWAYS...INTERSECTIONS...AND LOCALIZED AREAS PRONE
TO FLOODING WILL LIKELY STILL BE IMPACTED THROUGH 700 PM THIS
EVENING.
YOU CAN REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS
NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER
HASHTAG...NWSVEGAS.
LAT...LON 3590 11514 3596 11491 3654 11489 3654 11425
3614 11426 3584 11456 3583 11515
$$
KENNEDYThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 7:18 PM MST | Areal Flood Advisory | VEF | Mohave | 87 min |
| Aug 21, 11:32 PM MST | Areal Flood Advisory | VEF | Mohave | 118 min |
| Aug 22, 12:12 PM MST | Flash Flood Warning | VEF | Mohave | 4 hr |
| Aug 22, 2:40 PM MST | Areal Flood Advisory | VEF | Mohave | 6 hr |
| Aug 21, 6:10 PM MST | Flash Flood Warning | VEF | Clark, Lincoln | 2 hr |
| Aug 21, 6:47 PM MST | Flash Flood Warning | VEF | Lincoln | 118 min |
| Aug 22, 12:12 AM MST | Flash Flood Warning | VEF | Clark | 2 hr |
| Aug 22, 2:35 AM MST | Flash Flood Warning | VEF | Clark | 115 min |
| Aug 22, 8:22 AM MST | Areal Flood Advisory | VEF | Clark | 9 hr |
| Aug 22, 9:19 AM MST | Areal Flood Advisory | VEF | Clark, Lincoln, Nye | 3 hr |
| Aug 22, 9:20 AM MST | Flash Flood Warning | VEF | Clark | 101 min |
| Aug 22, 9:34 AM MST | Flash Flood Warning | VEF | Clark | 116 min |
| Aug 22, 9:59 AM MST | Flash Flood Warning | VEF | Clark | 59 min |
| Aug 22, 10:05 AM MST | Flash Flood Warning | VEF | Esmeralda | 76 min |
| Aug 22, 10:53 AM MST | Flash Flood Warning | VEF | Clark | 4 hr |
| Aug 22, 12:33 PM MST | Flash Flood Warning | VEF | Clark | 117 min |
Nearby
Flash Flood Warnings in Arizona, 2012Flash Flood Warnings in Nevada, 2012Every 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.