Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 213, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Oct 11, 2012, 8:39 AM PDT for Clark County, Nevada; Mohave County, Arizona; San Bernardino County, California. It was in force for 111 min. 2 reports 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
- Oct 11, 2012, 8:39 AM PDT (15:39 UTC)
- Expired
- Oct 11, 2012, 10:30 AM PDT
- In force
- 111 min
- 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), 31 km from the middle of the area, began a volume at 15:41 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 |
|---|---|---|---|
| Oct 11, 8:52 AM PDT | FLASH FLOOD | 4 Nne Bullhead City, AZ | THE NATIONAL PARK SERVICE REPORTED SEVERAL ROCKS HAD WASHED ONTO KATHERINE SPUR ROAD. |
| Oct 11, 9:57 AM PDT | FLASH FLOOD | 3 Sse Needles, CA | HIGHWAY 95 WAS REPORTED CLOSED AT FIVE MILE ROAD DUE TO FLASH FLOODING. |
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, 3.7 hours before the alert went out and 126 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
- 327 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 958 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 146 m²/s²
- 0-3 km storm-relative helicity
- 316 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.9
The text
As transmitted, in the capitals the NWS used until 2016.
519 WGUS55 KVEF 111539 FFWVEF AZC015-CAC071-NVC003-111730- /O.NEW.KVEF.FF.W.0213.121011T1539Z-121011T1730Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 839 AM MST THU OCT 11 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... WEST CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA... EAST CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... SOUTH CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 1030 AM MST/1030 AM PDT/. * AT 835 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A BAND OF HEAVY RAIN PRODUCING THUNDERSTORMS 11 MILES SOUTHEAST OF COTTONWOOD COVE...OR 13 MILES NORTH OF LAUGHLIN. THUNDERSTORMS WITHIN THIS BAND WERE MOVING NORTH AT 20 TO 25 MPH. * LOCATIONS IMPACTED INCLUDE... COTTONWOOD COVE AND COTTONWOOD COVE CAMPGROUND...WILLOW BEACH... LAUGHLIN...BULLHEAD CITY...MOHAVE VALLEY AND NEEDLES. THIS INCLUDES INTERSTATE 40 IN CALIFORNIA BETWEEN MILE MARKERS 139 AND 150. 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 3599 11481 3606 11453 3473 11443 3477 11465 $$ STACHELSKI
2 follow-up statements
496 WGUS75 KVEF 111628 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 928 AM MST THU OCT 11 2012 AZC015-CAC071-NVC003-111730- /O.CON.KVEF.FF.W.0213.000000T0000Z-121011T1730Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-SAN BERNARDINO CA-CLARK NV- 928 AM MST THU OCT 11 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 AM MST/1030 AM PDT/ FOR SOUTH CENTRAL CLARK...EAST CENTRAL SAN BERNARDINO AND WEST CENTRAL MOHAVE COUNTIES... AT 920 AM PDT...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE SHOWERS AND THUNDERSTORMS MOVING NORTH AT 15 TO 25 MPH IN THE COLORADO RIVER VALLEY FROM WILLOW BEACH TO TOPOCK. HEAVY DOWNPOURS FROM ANY STRONGER THUNDERSTORMS WILL BE CAPABLE OF PRODUCING OVER A HALF AN INCH OF RAIN IN A SHORT PERIOD OF TIME THAT WILL RESULT IN FLASH FLOODING ESPECIALLY IN LOW LYING AREAS AS WELL AS RAPID FLOWS IN WASHES. THE BULLHEAD CITY FIRE DEPARTMENT REPORTED THAT THE INTERSECTION OF DESERT FOOTHILLS BOULEVARD AND BULLHEAD CITY PARKWAY WAS SUBMERGED AT 852 AM MST. LOCATIONS IMPACTED INCLUDE... COTTONWOOD COVE AND COTTONWOOD COVE CAMPGROUND...WILLOW BEACH... LAUGHLIN...BULLHEAD CITY...MOHAVE VALLEY AND NEEDLES. THIS INCLUDES INTERSTATE 40 IN CALIFORNIA BETWEEN MILE MARKERS 140 AND 149. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3599 11481 3606 11453 3473 11443 3477 11465 $$ STACHELSKI
281 WGUS75 KVEF 111730 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1030 AM MST THU OCT 11 2012 AZC015-CAC071-NVC003-111739- /O.EXP.KVEF.FF.W.0213.000000T0000Z-121011T1730Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ-SAN BERNARDINO CA-CLARK NV- 1030 AM MST THU OCT 11 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 1030 AM MST/1030 AM PDT/ FOR SOUTH CENTRAL CLARK...EAST CENTRAL SAN BERNARDINO AND WEST CENTRAL MOHAVE COUNTIES... THIS INCLUDES INTERSTATE 40 IN CALIFORNIA BETWEEN MILE MARKERS 140 AND 149. ALTHOUGH NATIONAL WEATHER SERVICE RADAR INDICATES RAIN CONTINUES TO MOVE NORTH ACROSS THE COLORADO RIVER VALLEY...THE INTENSITY OF THE RAIN HAS GENERALLY LESSENED IN THE LAST 30 MINUTES. THEREFORE THE FLASH FLOOD WARNING FOR THIS AREA WILL BE ALLOWED TO EXPIRE. DRIVERS SHOULD STILL BE ALERT FOR SLICK ROADS AND WATER LINGERING IN LOW SPOTS AS WELL AS ANY DEBRIS THAT HAVE MAY NOT BEEN CLEARED FROM EARLIER. LAT...LON 3599 11481 3606 11453 3473 11443 3477 11465 $$ STACHELSKI
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 1:39 AM PDT | Areal Flood Advisory | VEF | Clark | 81 min |
| Oct 11, 8:22 AM PDT | Areal Flood Advisory | VEF | Clark | 7 hr |
| Oct 11, 11:48 AM PDT | Areal Flood Advisory | VEF | Clark | 2 hr |
| Oct 11, 1:51 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 24 min |
| Oct 11, 2:53 PM PDT | Flash Flood Warning | VEF | Clark | 39 min |
| Oct 11, 4:18 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 27 min |
| Oct 11, 4:53 PM PDT | Flash Flood Warning | VEF | Clark | 112 min |
| Oct 11, 4:07 PM PDT | Severe Thunderstorm Warning | VEF | Mohave | 23 min |
| Oct 11, 4:25 PM PDT | Severe Thunderstorm Warning | VEF | Mohave | 19 min |
Nearby
Flash Flood Warnings in Nevada, 2012Flash Flood Warnings in Arizona, 2012Flash Flood Warnings in California, 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.