Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 54, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 23, 2012, 12:46 AM PDT for Clark County, Nevada. It was in force for 93 min. 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, 12:46 AM PDT (07:46 UTC)
- Expired
- Jul 23, 2012, 2:19 AM PDT
- In force
- 93 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Clark County, NV
The radar
The Las Vegas radar (KESX), 102 km from the middle of the area, began a volume at 07:47 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 00:00Z, 7.8 hours before the alert went out and 117 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
- 257 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 3301 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
540 WGUS55 KVEF 230746 FFWVEF NVC003-230945- /O.NEW.KVEF.FF.W.0054.120723T0746Z-120723T0945Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 1246 AM PDT MON JUL 23 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 245 AM PDT. * AT 1239 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM 10 MILES EAST OF OVERTON BEACH...OR 15 MILES EAST OF OVERTON. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE...OVERTON BEACH AND ECHO BAY. 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 3651 11406 3625 11443 3640 11444 3660 11419 $$ KENNEDY
2 follow-up statements
013 WGUS75 KVEF 230835 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 135 AM PDT MON JUL 23 2012 NVC003-230945- /O.CON.KVEF.FF.W.0054.000000T0000Z-120723T0945Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 135 AM PDT MON JUL 23 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 AM PDT FOR EAST CENTRAL CLARK COUNTY... AT 130 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE SHOWERS EAST OF OVERTON IN OVER THE WARNED AREA. WITH RADAR PRECIPITATION ESTIMATES BETWEEN TWO AND THREE INCHES ASSOCIATED WITH PRIOR THUNDERSTORMS...FLASH FLOODING IS LIKELY STILL OCCURRING IN AREA WASHES AND LOW LYING AREAS. LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF EASTERN CLARK COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. CAMPERS AND HIKERS SHOULD BE ALERT TO THE POSSIBILITY OF RAPIDLY RISING WATER AND BE PREPARED TO MOVE QUICKLY TO HIGHER GROUND IF FLASH FLOODING IS OBSERVED. && LAT...LON 3651 11406 3625 11443 3640 11444 3660 11419 $$ KENNEDY
613 WGUS75 KVEF 230919 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 219 AM PDT MON JUL 23 2012 NVC003-230925- /O.CAN.KVEF.FF.W.0054.000000T0000Z-120723T0945Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 219 AM PDT MON JUL 23 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL CLARK COUNTY... ALTHOUGH SCATTERED SHOWERS CONTINUE TO DEVELOP EAST OF OVERTON AND OVERTON BEACH...PRECIPITATION IS LIGHTER AND ADDITIONAL HEAVY PRECIPITATION IS NOT EXPECTED. ANY FLOODING WHICH OCCURRED SHOULD RECEDE. LAT...LON 3651 11406 3625 11443 3640 11444 3660 11419 $$ KENNEDY
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 6:02 AM PDT | Areal Flood Advisory | VEF | Clark | 58 min |
| Jul 23, 1:11 PM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| 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.