Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 204, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 11, 2012, 2:18 PM PDT for Clark County, Nevada. It was in force for 4 hr. 8 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
- Sep 11, 2012, 2:18 PM PDT (21:18 UTC)
- Expired
- Sep 11, 2012, 6:15 PM PDT
- In force
- 4 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Clark County, NV
The radar
The Las Vegas radar (KESX), 99 km from the middle of the area, began a volume at 21:18 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 |
|---|---|---|---|
| Sep 11, 2:45 PM PDT | FLASH FLOOD | Valley Of Fire (Slcn2), NV | VALLEY OF FIRE VISTORS CENTER REPORTS 2 FEET OF WATER ACROSS A SECTION OF WHITE DOME ROAD. IN PROCESS OF EVACUATING AND CLOSING PARK. |
| Sep 11, 2:50 PM PDT | FLASH FLOOD | Overton, NV | REPORT FROM THE NHP THAT STATE ROUTE 169 IN OVERTON IS CLOSED NEAR THE OVERTON WASH. |
| Sep 11, 2:55 PM PDT | FLASH FLOOD | 5 Sse Logandale, NV | SPOTTER REPORTS THAT 1.5 FEET OF WATER OVER WARM SPRING LOOP ROAD AND ALSO OVER STATE ROUTE 168 IN MOAPA. |
| Sep 11, 2:59 PM PDT | FLASH FLOOD | 2 Sse Logandale, NV | SPOTTER REPORTED MULTIPLE ROAD CLOSURES IN LOGANDALE. GUBLER ROAD AND HEYER IS CLOSED. |
| Sep 11, 3:04 PM PDT | FLASH FLOOD | 10 Sw Moapa, NV | NHP REPORTS THAT INTERSTATE 15 IS CLOSED AT MILE MARKER 75. THIS IS WHERE THE CALIFORNIA WASH CROSSES I-15. |
| Sep 11, 3:04 PM PDT | FLASH FLOOD | 4 Wnw California Wash (, NV | NHP REPORTS THAT INTERSTATE 15 IS CLOSED AT MILE MARKER 75. THIS IS WHERE THE CALIFORNIA WASH CROSSES I-15. |
| Sep 11, 5:17 PM PDT | FLASH FLOOD | 1 Sse Moapa, NV | SWIFT WATER RESCUE WHERE THE CALIFORNIA WASH CROSSES HIDDEN VALLEY ROAD IN MOAPA. WATER IS FLOWING OVER THE CAB OF THE PICKUP TRUCK. |
| Sep 11, 5:17 PM PDT | FLASH FLOOD | 5 Sse Logandale, NV | SWIFT WATER RESCUE WHERE THE CALIFORNIA WASH CROSSES HIDDEN VALLEY ROAD IN MOAPA. WATER IS FLOWING OVER THE CAB OF THE PICKUP TRUCK. |
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, 9.3 hours before the alert went out and 89 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
- 2 J/kg
- Mixed-layer CIN
- -171 J/kg
- Mixed-layer LCL
- 1725 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
362 WGUS55 KVEF 112118 FFWVEF NVC003-120115- /O.NEW.KVEF.FF.W.0204.120911T2118Z-120912T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 218 PM PDT TUE SEP 11 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 615 PM PDT. * AT 214 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A CLUSTER OF THUNDERSTORMS FROM VALLEY OF FIRE TO MOAPA AND OVERTON. THE THUNDERSTORMS WERE MOVING EAST AROUND 10 MPH AND WILL PRODUCE OVER ONE INCH OF RAINFALL IN LESS THAN AN HOUR. HIGH WATER FLOWS ARE ALSO EXPECTED IN CALIFORNIA WASH... THE MUDDY RIVER AND MEADOW VALLEY WASH. * LOCATIONS IMPACTED INCLUDE... OVERTON...VALLEY OF FIRE STATE PARK...VALLEY OF FIRE...LOGANDALE AND OVERTON BEACH. THIS INCLUDES INTERSTATE 15 BETWEEN MILE MARKERS 69 AND 93. 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 3675 11460 3647 11434 3636 11443 3644 11488 $$ JA
3 follow-up statements
071 WGUS75 KVEF 112228 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 328 PM PDT TUE SEP 11 2012 NVC003-120115- /O.CON.KVEF.FF.W.0204.000000T0000Z-120912T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 328 PM PDT TUE SEP 11 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM PDT FOR CENTRAL CLARK COUNTY... LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT STATE ROUTE 168 IN MOAPA AND STATE ROUTE 169 IN OVERTON WERE CLOSED AROUND 250 PM DUE TO FLASH FLOODING. FLOODING WAS ALSO IMPACTING ROADS IN VALLEY OF FIRE AND A STATE PARK OFFICIAL SAID THE PARK WAS BEING EVACUATED BETWEEN 230 PM AND 3 PM. THUNDERSTORMS THAT PRODUCED HEAVY RAIN OVER THIS AREA HAVE DISSIPATED AND MOVED TO THE EAST BUT LIGHT TO MODERATE RAIN SHOWERS WILL PERSIST THROUGH 430 PM. FLOODING OF WASHES AND ROADS IN THE AREA WILL CONTINUE THROUGH THE LATE AFTERNOON AS RUNOFF FROM THE PREVIOUS HEAVY RAINFALL MAKES ITS WAY DOWN DRAINAGE CHANNELS.ALSO...THE CALIFORNIA WASH WHICH PARALLELS I-15 AND FLOWS TOWARD MOAPA AND EVENTUALLY LOGANDALE AND OVERTON WILL BE CARRYING HIGH WATER. LOCATIONS IMPACTED INCLUDE... OVERTON...MOAPA AND LOGANDALE. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3675 11460 3647 11434 3636 11443 3644 11488 $$ JA
947 WGUS75 KVEF 112353 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 453 PM PDT TUE SEP 11 2012 NVC003-120115- /O.CON.KVEF.FF.W.0204.000000T0000Z-120912T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 453 PM PDT TUE SEP 11 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM PDT FOR NORTHEAST CLARK COUNTY... LOCAL LAW ENFORCEMENT OFFICIALS REPORTED WATER FLOWING BANK FULL IN THE CALIFORNIA WASH WHICH FLOWS ACROSS STATE ROUTES 78 AND 168 NEAR MOAPA. WATER FROM THE WASH CLOSED THE SOUTHBOUND LANE OF INTERSTATE 15 AROUND 3 PM. THIS HIGH WATER WILL FLOW INTO THE MUDDY RIVER THEN MAKE ITS WAY DOWN THROUGH LOGANDALE AND OVERTON THIS EVENING. NO ADDITIONAL SIGNIFICANT RAIN IS EXPECTED BUT PEOPLE IN THE MOAPA VALLEY NEED TO BE AWARE OF HIGH FLOWS IN THE MUDDY RIVER WHICH MAY IMPACT ROADS LATER THIS EVENING. THIS INCLUDES INTERSTATE 15 NEAR MILE MARKER 75. 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 3675 11460 3647 11434 3636 11443 3644 11488 $$ JA
707 WGUS75 KVEF 120114 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 614 PM PDT TUE SEP 11 2012 NVC003-120122- /O.EXP.KVEF.FF.W.0204.000000T0000Z-120912T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 614 PM PDT TUE SEP 11 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 615 PM PDT FOR CENTRAL CLARK COUNTY... HEAVY RAIN HAS ENDED ACROSS NORTHEAST CLARK COUNTY BUT HIGH FLOWS IN THE CALIFORNIA WASH WILL MOVE DOWN THE MUDDY RIVER THROUGH LOGANDALE AND OVERTON LATE THIS EVENING AND LIKELY THROUGH EARLY WEDNESDAY MORNING. THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE ON SCHEDULE BUT A FLOOD WARNING IS IN EFFECT FOR THE MUDDY RIVER THROUGH 4 AM WEDNESDAY. LAT...LON 3675 11460 3647 11434 3636 11443 3644 11488 $$ JA
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 3:24 AM PDT | Flash Flood Warning | VEF | Clark | 111 min |
| Sep 11, 4:52 AM PDT | Flash Flood Warning | VEF | Nye | 113 min |
| Sep 11, 8:28 AM PDT | Areal Flood Advisory | VEF | Lincoln | 3 hr |
| Sep 11, 11:33 AM PDT | Areal Flood Advisory | VEF | Clark | 3 hr |
| Sep 11, 12:32 PM PDT | Flash Flood Warning | VEF | Clark | 88 min |
| Sep 11, 1:44 PM PDT | Areal Flood Advisory | VEF | Clark | 27 min |
| Sep 11, 1:51 PM PDT | Flash Flood Warning | VEF | Clark | 114 min |
| Sep 11, 2:08 PM PDT | Flash Flood Warning | VEF | Clark | 93 min |
| Sep 11, 2:16 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 44 min |
| Sep 11, 3:39 PM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| Sep 11, 4:02 PM PDT | Flash Flood Warning | VEF | Clark | 118 min |
Nearby
Flash 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.