Alert archive / Nevada / Flash Flood Warnings in 2014
Flash Flood Warning 83, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 4, 2014, 2:21 PM PDT for Clark County, Nevada. It was in force for 3 hr. 6 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
- Aug 4, 2014, 2:21 PM PDT (21:21 UTC)
- Expired
- Aug 4, 2014, 5:15 PM PDT
- In force
- 3 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), 57 km from the middle of the area, began a volume at 21:22 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 4, 2:30 PM PDT | HEAVY RAIN 1.26 | 4 Wsw Las Vegas Strip, NV | A CLARK COUNTY REGIONAL FLOOD CONTROL DISTRICT GAUGE MEASURED 1.26 INCHES OF RAIN NEAR TROPICANA AND TORREY PINES WITH 0.75 INCH FALLING IN 15 MINUTES. |
| Aug 4, 2:43 PM PDT | FLASH FLOOD | 5 Sw Las Vegas, NV | PUBLIC REPORT FROM TWITTER OF WATER SEVERAL INCHES DEEP AT TWAIN AND DECATUR ROADS. |
| Aug 4, 3:17 PM PDT | FLASH FLOOD | 4 Wsw Las Vegas, NV | A SWIFWATER RESCUE WAS CONDUCTED AT DECATUR AND OAKEY. |
| Aug 4, 3:30 PM PDT | FLASH FLOOD | 5 Wsw Las Vegas Strip, NV | SOCIAL MEDIA VIDEO SHOWED WATER EST. 5 INCHES DEEP FLOWING OVER ROAD AT TROPICANA AND RAINBOW BLVD INTERSECTION. FLOOD CONTROL WASHES FULL IN THE AREA. |
| Aug 4, 3:30 PM PDT | FLASH FLOOD | Las Vegas, NV | A LARGE SECTION OF A CONCRETE BLOCK WALL WAS KNOCKED DOWN BY FLOODWATERS. |
| Aug 4, 4:15 PM PDT | FLASH FLOOD | 4 Ssw Las Vegas, NV | BROADCAST MEDIA TWEETED PICTURE OF WATER SEVERAL INCHES DEEP OVER THE ROADWAY AT THE INTERSECTION OF KOVAL LANE AND WINNICK AVE. |
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, 9.4 hours before the alert went out and 40 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
- 6 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 932 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
322 WGUS55 KVEF 042121 RRA FFWVEF NVC003-050015- /O.NEW.KVEF.FF.W.0083.140804T2121Z-140805T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 221 PM PDT MON AUG 4 2014 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 515 PM PDT * AT 212 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR SPRING VALLEY...OR 6 MILES SOUTHWEST OF DOWNTOWN LAS VEGAS. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. RAINFALL GAGES IN THE AREA HAVE BEEN SHOWING BETWEEN HALF AN INCH AND AN INCH OF RAIN IN HALF AN HOUR. * LOCATIONS IMPACTED INCLUDE... DOWNTOWN LAS VEGAS...UNLV...SPRING VALLEY...THE STRIP AND NORTH LAS VEGAS AIRPORT. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON ROADS...IN NORMALLY DRY WASHES AND LOW LYING AREAS. NEVER TRY TO CROSS A FLOODED ROAD OR ENTER A FLOOD CHANNEL. TURN AROUND...DONT DROWN! REPORT FLOODING TO THE LAS VEGAS NATIONAL WEATHER SERVICE VIA FACEBOOK OR TWITTER. && LAT...LON 3623 11525 3618 11503 3602 11508 3613 11532 $$ ASG
2 follow-up statements
401 WGUS75 KVEF 042145 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 245 PM PDT MON AUG 4 2014 NVC003-050015- /O.CON.KVEF.FF.W.0083.000000T0000Z-140805T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 245 PM PDT MON AUG 4 2014 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM PDT FOR CENTRAL CLARK COUNTY... AT 227 PM PDT...DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM THAT WAS PRODUCING FLASH FLOODING OVER DOWNTOWN LAS VEGAS. THIS THUNDERSTORM WAS NEARLY STATIONARY AND HAS ALREADY PRODUCED AN INCH OF RAIN OVER THE PAST HOUR. THERE HAVE ALSO BEEN REPORTS OF FLASH FLOODING IN THE WARNED AREA. LOCATIONS IMPACTED INCLUDE... DOWNTOWN LAS VEGAS...THE STRIP AND NORTH LAS VEGAS AIRPORT. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON ROADS...IN NORMALLY DRY WASHES AND LOW LYING AREAS. NEVER TRY TO CROSS A FLOODED ROAD OR ENTER A FLOOD CHANNEL. TURN AROUND...DONT DROWN! REPORT FLOODING TO THE LAS VEGAS NATIONAL WEATHER SERVICE VIA FACEBOOK OR TWITTER. && LAT...LON 3623 11525 3618 11503 3602 11508 3613 11532 $$ ASG
180 WGUS75 KVEF 050011 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 511 PM PDT MON AUG 4 2014 NVC003-050019- /O.EXP.KVEF.FF.W.0083.000000T0000Z-140805T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 511 PM PDT MON AUG 4 2014 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 515 PM PDT FOR CENTRAL CLARK COUNTY... HEAVY RAIN FROM EARLIER STORMS HAS MOVED OUT OF THE AREA...THEREFORE THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE. HOWEVER...THERE ARE STILL MANY STREETS AROUND LAS VEGAS THAT STILL HAVE STANDING WATER WHICH WILL LIKELY CONTINUE THROUGH 600 PM. DRIVERS SHOULD STILL USE CAUTION WHILE DRIVING AROUND TOWN. LAT...LON 3623 11525 3618 11503 3602 11508 3613 11532 $$ ASG
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 5:32 PM PDT | Areal Flood Advisory | VEF | Clark | 3 hr |
| Aug 3, 6:08 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 3, 7:24 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 3, 8:02 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 3, 9:05 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 3, 9:51 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 3, 11:06 PM PDT | Areal Flood Advisory | VEF | Clark | 3 hr |
| Aug 3, 11:17 PM PDT | Areal Flood Advisory | VEF | Clark | 3 hr |
| Aug 3, 11:31 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 3, 11:35 PM PDT | Flash Flood Warning | VEF | Clark, Lincoln | 3 hr |
| Aug 3, 11:45 PM PDT | Areal Flood Advisory | VEF | Nye | 3 hr |
| Aug 3, 11:58 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 4, 2:44 AM PDT | Areal Flood Advisory | VEF | Nye | 2 hr |
| Aug 4, 3:25 AM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 4, 4:58 AM PDT | Areal Flood Advisory | VEF | Clark | 3 hr |
| Aug 4, 12:06 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 4, 1:13 PM PDT | Areal Flood Advisory | VEF | Nye | 3 hr |
| Aug 4, 1:21 PM PDT | Areal Flood Advisory | VEF | Clark | 114 min |
| Aug 4, 1:47 PM PDT | Flash Flood Warning | VEF | Clark | 118 min |
| Aug 4, 2:16 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 4, 2:21 PM PDT | Flash Flood Warning | VEF | Nye | 114 min |
| Aug 4, 2:28 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 4, 2:57 PM PDT | Areal Flood Advisory | VEF | Clark, Lincoln | 5 hr |
| Aug 4, 3:45 PM PDT | Flash Flood Warning | VEF | Esmeralda, Nye | 3 hr |
| Aug 4, 3:56 PM PDT | Flash Flood Warning | VEF | Lincoln | 3 hr |
| Aug 4, 4:16 PM PDT | Areal Flood Advisory | VEF | Clark, Nye | 3 hr |
Nearby
Flash Flood Warnings in Nevada, 2014Every flash flood warning in 2014
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.