Alert archive / Arizona / Flash Flood Warnings in 2014
Flash Flood Warning 99, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 12, 2014, 4:14 PM MST for Mohave County, Arizona; San Bernardino County, California; Clark County, Nevada. 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
- Aug 12, 2014, 4:14 PM MST (23:14 UTC)
- Expired
- Aug 12, 2014, 7:15 PM MST
- In force
- 3 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
Counties Mohave County, AZ, San Bernardino County, CA, Clark County, NV
The radar
The Las Vegas radar (KESX), 84 km from the middle of the area, began a volume at 23:17 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 12:00Z, 11.2 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.
- Mixed-layer CAPE
- 17 J/kg
- Mixed-layer CIN
- -366 J/kg
- Mixed-layer LCL
- 2049 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
479
WGUS55 KVEF 122314
FFWVEF
AZC015-CAC071-NVC003-130215-
/O.NEW.KVEF.FF.W.0099.140812T2314Z-140813T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
414 PM PDT TUE AUG 12 2014
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN MOHAVE COUNTY IN NORTHWEST ARIZONA...
EAST CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
EXTREME SOUTH CENTRAL CLARK COUNTY IN SOUTHERN NEVADA...
* UNTIL 715 PM PDT/715 PM MST/
* AT 411 PM PDT...TRAINED WEATHER SPOTTERS REPORTED FLASH FLOODING
FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES NORTHEAST OF
HIGHWAY 95 AND I-40 TO NEEDLES...OR ALONG A LINE EXTENDING FROM 14
MILES SOUTHWEST OF LAUGHLIN TO 8 MILES NORTHWEST OF TOPOCK. THE
STORMS PRODUCING FLASH FLOODING WERE NEARLY STATIONARY.
* LOCATIONS IMPACTED INCLUDE...
MOHAVE VALLEY...NEEDLES AND HIGHWAY 95.
THIS INCLUDES INTERSTATE 40 IN CALIFORNIA BETWEEN MILE MARKERS 132
AND 148.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED ON ROADS...IN NORMALLY DRY WASHES AND LOW
LYING AREAS. NEVER TRY TO CROSS A FLOODED ROAD OR ENTER A FLOOD
CHANNEL. TURN AROUND...DONT DROWN!
REPORT FLOODING TO THE LAS VEGAS NATIONAL WEATHER SERVICE VIA
FACEBOOK OR TWITTER.
&&
LAT...LON 3511 11466 3496 11461 3496 11456 3479 11451
3473 11475 3510 11487
$$
JH2 follow-up statements
204
WGUS75 KVEF 130032
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
532 PM PDT TUE AUG 12 2014
AZC015-CAC071-NVC003-130215-
/O.CON.KVEF.FF.W.0099.000000T0000Z-140813T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-SAN BERNARDINO CA-CLARK NV-
532 PM PDT TUE AUG 12 2014
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM PDT/715 PM
MST/ FOR EXTREME SOUTH CENTRAL CLARK...EAST CENTRAL SAN BERNARDINO
AND SOUTHWESTERN MOHAVE COUNTIES...
TRAINED SPOTTERS REPORTED FLOODING IN THE NEEDLES AREA. A FEW
THUNDERSTORMS CONTINUE TO MOVE INTO THE AREA. RAINFALL FROM THESE
STORMS COMBINED WITH RUNOFF FROM EARLIER HEAVY RAIN COULD STILL
CAUSE FLOODING.
LOCATIONS IMPACTED INCLUDE...
NEEDLES...NEEDLES KOA CAMPGROUND AND MOHAVE VALLEY AND HIGHWAY 95
FROM NEEDLES TO EXTREME SOUTHERN CLARK COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
ROADS. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO
CROSS A FLOODED ROAD OR ENTER A FLOOD CHANNEL. TURN AROUND...DONT
DROWN!
REPORT FLOODING TO THE LAS VEGAS NATIONAL WEATHER SERVICE VIA
FACEBOOK OR TWITTER.
&&
LAT...LON 3511 11466 3496 11461 3496 11456 3479 11451
3473 11475 3510 11487
$$
JH511
WGUS75 KVEF 130220
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
720 PM PDT TUE AUG 12 2014
AZC015-CAC071-NVC003-130229-
/O.EXP.KVEF.FF.W.0099.000000T0000Z-140813T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-SAN BERNARDINO CA-CLARK NV-
720 PM PDT TUE AUG 12 2014
...THE FLASH FLOOD WARNING HAS EXPIRED FOR EXTREME SOUTH CENTRAL
CLARK...EAST CENTRAL SAN BERNARDINO AND SOUTHWESTERN MOHAVE
COUNTIES...
THERE HAS BEEN NO SIGNIFICANT RAINFALL IN THE WARNING AREA FOR A
WHILE. THERE IS STILL POTENTIAL FOR MORE STORMS TO DEVELOP THIS
EVENING HOWEVER.
LAT...LON 3511 11466 3496 11461 3496 11456 3479 11451
3473 11475 3510 11487
$$
JHThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 5:19 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 11, 6:22 PM MST | Flash Flood Watch | VEF | Mohave | 38 hr |
| Aug 12, 2:55 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 12, 2:59 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 46 min |
| Aug 12, 3:40 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 40 min |
| Aug 12, 4:02 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 12, 4:05 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 40 min |
| Aug 12, 4:43 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 12, 12:40 PM MST | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 12, 1:16 PM MST | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Aug 12, 2:28 PM MST | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 12, 2:42 PM MST | Flash Flood Warning | VEF | Inyo | 3 hr |
| Aug 12, 4:20 PM MST | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 12, 4:25 PM MST | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 12, 4:51 PM MST | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 11, 8:06 PM MST | Areal Flood Advisory | VEF | Clark | 84 min |
| Aug 12, 2:13 PM MST | Areal Flood Advisory | VEF | Clark | 3 hr |
| Aug 12, 2:44 PM MST | Flash Flood Warning | VEF | Clark | 3 hr |
Nearby
Flash Flood Warnings in Arizona, 2014Flash Flood Warnings in California, 2014Flash Flood Warnings in Nevada, 2014Every flash flood warning in 2014
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.