Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 145, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 22, 2012, 2:35 AM PDT for Clark County, Nevada. It was in force for 115 min. 1 report 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
- Aug 22, 2012, 2:35 AM PDT (09:35 UTC)
- Expired
- Aug 22, 2012, 4:30 AM PDT
- In force
- 115 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), 133 km from the middle of the area, began a volume at 09:36 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 |
|---|---|---|---|
| Aug 22, 3:36 AM PDT | HEAVY RAIN 1.5 | 1 Wsw Bunkerville, NV | STORM TOTAL PRECIPITATION SO FAR HAS BEEN 1.50 INCHES IN THE PAST 2-3 HOURS. POWER IS OUT ALSO. |
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 00:00Z, 9.6 hours before the alert went out and 124 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3181 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
229 WGUS55 KVEF 220935 FFWVEF NVC003-221130- /O.NEW.KVEF.FF.W.0145.120822T0935Z-120822T1130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 235 AM PDT WED AUG 22 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 430 AM PDT. * AT 232 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM THUNDERSTORMS OVER BUNKERVILLE AND MESQUITE. THESE STORMS WERE MOVING TO THE NORTHEAST AT 20 MPH BUT WERE REGENERATING TO THE SOUTHWEST AND MOVING REPEATEDLY OVER THE SAME AREA. RAINFALL AMOUNTS UP TO THREE-QUARTERS OF AN INCH HAVE FALLEN SINCE 145 AM AND AN ADDITIONAL HALF INCH TO ONE INCH IS LIKELY BEFORE THE RAIN ENDS. * LOCATIONS IMPACTED INCLUDE... MESQUITE AND BUNKERVILLE. THIS INCLUDES INTERSTATE 15 BETWEEN MILE MARKERS 105 AND 120. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. 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 3683 11433 3684 11406 3669 11406 3669 11441 $$ JA
2 follow-up statements
047 WGUS75 KVEF 221042 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 342 AM PDT WED AUG 22 2012 NVC003-221130- /O.CON.KVEF.FF.W.0145.000000T0000Z-120822T1130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 342 AM PDT WED AUG 22 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM PDT FOR NORTHEASTERN CLARK COUNTY... AT 328 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS SLOWLY MOVING NORTHEAST ACROSS THE EXTREME NORTHEAST CORNER OF CLARK COUNTY...OR ACROSS THE BUNKERVILLE/MESQUITE AREAS. AS OF 335 AM PDT...A TRAINED STORM SPOTTER REPORTED THAT 1.50 INCHES OF RAIN HAD FALLEN SO FAR IN THE BUNKERVILLE AREA. REPORTS ARE ALSO SHOWING THAT WATER IS FLOWING IN THE NORMALLY DRY WASHES AND DRAINAGE CHANNELS. LOCATIONS IMPACTED INCLUDE... THIS INCLUDES INTERSTATE 15 BETWEEN MILE MARKERS 105 AND 120. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS EVEN HARDER TO SEE WATER COVERING THE ROADWAY OR IN LOW WATER CROSSINGS. && LAT...LON 3683 11433 3684 11406 3669 11406 3669 11441 $$ JENSEN
568 WGUS75 KVEF 221126 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 426 AM PDT WED AUG 22 2012 NVC003-221132- /O.EXP.KVEF.FF.W.0145.000000T0000Z-120822T1130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 426 AM PDT WED AUG 22 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 430 AM PDT FOR NORTHEASTERN CLARK COUNTY... THUNDERSTORMS HAVE MOVED OUT OF THE AREA AND HEAVY RAINFALL IS NO LONGER BEING REPORTED. THUS WILL ALLOW THE FLASH FLOOD WARNING TO EXPIRE AS OF 430 AM PDT. HOWEVER ADDITIONAL SHOWERS AND THUNDERSTORMS ARE FORMING AROUND CLARK COUNTY AND MAY MOVED ACROSS THE BUNKERVILLE/MESQUITE AREAS ONCE AGAIN. ANY ADDITIONAL RAINFALL WILL ADD TO THE HEAVY RAINFALL OF EARLIER AND CONTINUE TO CREATE POTENTIAL PROBLEMS. WATER WILL LIKELY BE FLOWING THROUGH THE NORMALLY DRY WASHES AND ACROSS LOW WATER CROSSING THROUGH THE MORNING. MOTORIST ARE URGED TO CONTINUE USING CAUTION...ESPECIALLY UNTIL SUNRISE AS WATER IS VERY HARD TO SEE AT NIGHT. LAT...LON 3683 11433 3684 11406 3669 11406 3669 11441 $$ JENSEN
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 6:10 PM PDT | Flash Flood Warning | VEF | Clark, Lincoln | 2 hr |
| Aug 21, 6:47 PM PDT | Flash Flood Warning | VEF | Lincoln | 118 min |
| Aug 22, 12:12 AM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| Aug 22, 8:22 AM PDT | Areal Flood Advisory | VEF | Clark | 9 hr |
| Aug 22, 9:19 AM PDT | Areal Flood Advisory | VEF | Clark, Lincoln, Nye | 3 hr |
| Aug 22, 9:20 AM PDT | Flash Flood Warning | VEF | Clark | 101 min |
| Aug 22, 9:34 AM PDT | Flash Flood Warning | VEF | Clark | 116 min |
| Aug 22, 9:59 AM PDT | Flash Flood Warning | VEF | Clark | 59 min |
| Aug 22, 10:05 AM PDT | Flash Flood Warning | VEF | Esmeralda | 76 min |
| Aug 22, 10:53 AM PDT | Flash Flood Warning | VEF | Clark | 4 hr |
| Aug 22, 12:12 PM PDT | Flash Flood Warning | VEF | Clark | 4 hr |
| Aug 22, 12:33 PM PDT | Flash Flood Warning | VEF | Clark | 117 min |
| Aug 22, 2:40 PM PDT | Areal Flood Advisory | VEF | Clark | 6 hr |
| Aug 22, 3:43 PM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
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.