Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 58, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 23, 2012, 1:11 PM PDT for Clark County, Nevada. It was in force for 2 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 23, 2012, 1:11 PM PDT (20:11 UTC)
- Expired
- Jul 23, 2012, 3:15 PM PDT
- In force
- 2 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), 80 km from the middle of the area, began a volume at 20:11 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, 8.2 hours before the alert went out and 49 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
- 177 J/kg
- Mixed-layer CIN
- -137 J/kg
- Mixed-layer LCL
- 2252 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- -22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
062 WGUS55 KVEF 232011 FFWVEF NVC003-232215- /O.NEW.KVEF.FF.W.0058.120723T2011Z-120723T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 111 PM PDT MON JUL 23 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... WEST CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 315 PM PDT. * AT 107 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM 9 MILES NORTH OF SANDY VALLEY. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE... SANDY VALLEY...THE SOUTHERN END OF THE PAHRUMP VALLEY...STATE ROUTE 160 AND THE OLD SPANISH TRAIL HIGHWAY 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 3600 11589 3610 11573 3594 11550 3578 11560 $$ JA
2 follow-up statements
063 WGUS75 KVEF 232108 RRA FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 208 PM PDT MON JUL 23 2012 NVC003-232215- /O.CON.KVEF.FF.W.0058.000000T0000Z-120723T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 208 PM PDT MON JUL 23 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM PDT FOR WEST CENTRAL CLARK COUNTY... HEAVY RAIN ENDED OVER THE AREA BETWEEN SANDY VALLEY AND PAHRUMP AROUDN 130 PM. HOWEVER...ESTIMATED RAINFALL AMOUNTS OVER 1 INCH OCCURRED IN THIS AREA AND RUNOFF WILL LIKELY PRODUCE FLOODING ACROSS SECONDARY ROADS FROM BETWEEN THE OLD SPANISH TRAIL HIGHWAY AND SANDY VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3600 11589 3610 11573 3594 11550 3578 11560 $$ JA
557 WGUS75 KVEF 232208 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 308 PM PDT MON JUL 23 2012 NVC003-232216- /O.EXP.KVEF.FF.W.0058.000000T0000Z-120723T2215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 308 PM PDT MON JUL 23 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 315 PM PDT FOR WEST CENTRAL CLARK COUNTY... RUNOFF FROM HEAVY RAIN THAT OCCURRED EARLIER BETWEEN SANDY VALLEY AND PAHRUMP HAS LIKELY RECEDED AND THE FLASH FLOOD WARNING FOR THIS AREA WILL BE ALLOWED TO EXPIRE. LAT...LON 3600 11589 3610 11573 3594 11550 3578 11560 $$ JA
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 12:46 AM PDT | Flash Flood Warning | VEF | Clark | 93 min |
| Jul 23, 6:02 AM PDT | Areal Flood Advisory | VEF | Clark | 58 min |
| Jul 23, 1:48 PM PDT | Areal Flood Advisory | VEF | Clark | 39 min |
| Jul 23, 3:52 PM PDT | Severe Thunderstorm Warning | VEF | Lincoln, Nye | 53 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.