Alert archive / Nevada / Flash Flood Watches in 2011
Flash Flood Watch 2, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood watch at Jul 6, 2011, 4:40 AM PDT for 4 counties in Nevada; Inyo County, San Bernardino County, California; Mohave County, Arizona. It took effect at Jul 6, 2011, 12:00 PM PDT. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- Jul 6, 2011, 4:40 AM PDT (11:40 UTC)
- In effect from
- Jul 6, 2011, 12:00 PM PDT
- Expired
- Jul 6, 2011, 10:00 PM PDT
- In force
- 10 hr
- Issued by
- NWS Las Vegas, NV
- Flood severity
- None
Counties Mohave County, AZ, Inyo County, CA, San Bernardino County, CA, Clark County, NV, Esmeralda County, NV, Lincoln County, NV, Nye County, NV
The radar
The Las Vegas radar (KESX), 142 km from the middle of the area, began a volume at 11:40 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, 11.7 hours before the alert went out and 47 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
- 2968 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
493 WGUS65 KVEF 061140 FFAVEF URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE LAS VEGAS NV 440 AM PDT WED JUL 6 2011 ...THUNDERSTORMS WILL HEAVY RAIN POSSIBLE ACROSS PARTS OF EASTERN CALIFORNIA AND SOUTHERN NEVADA TODAY... .WELL ABOVE NORMAL MOISTURE VALUES ARE IN PLACE ACROSS THE MOJAVE DESERT AND SOUTHERN GREAT BASIN. SCATTERED THUNDERSTORMS WITH HEAVY RAIN ARE POSSIBLE IN PARTS OF EASTERN INYO COUNTY AND THE SOUTHERN HALF OF NYE COUNTY THIS AFTERNOON AND EVENING. CAZ522-NVZ014-017-061900- /O.NEW.KVEF.FF.A.0002.110706T1900Z-110707T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DEATH VALLEY NATIONAL PARK-ESMERALDA AND CENTRAL NYE COUNTY- WESTERN CLARK AND SOUTHERN NYE COUNTY- 440 AM PDT WED JUL 6 2011 ...FLASH FLOOD WATCH IN EFFECT FROM NOON PDT TODAY THROUGH THIS EVENING... THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF CALIFORNIA AND NEVADA... INCLUDING THE FOLLOWING AREAS...IN CALIFORNIA...DEATH VALLEY NATIONAL PARK. IN NEVADA...ESMERALDA AND CENTRAL NYE COUNTY AND WESTERN CLARK AND SOUTHERN NYE COUNTY. * FROM NOON PDT TODAY THROUGH THIS EVENING * WELL ABOVE NORMAL MOISTURE VALUES ARE IN PLACE WITHIN THE WATCH AREA. ANY THUNDERSTORMS THAT DEVELOP WILL GENERATE HEAVY RAINFALL. RAINFALL AMOUNTS OF UP TO 2 INCHES IN AN HOUR COULD OCCUR. * MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY SINCE FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION AND PERSONS IN AND NEAR THE WATCH AREA SHOULD BE ALERT TO THE POTENTIAL FOR HEAVY RAINFALL. && $$ PIERCE
3 follow-up statements
579 WGUS65 KVEF 061726 FFAVEF URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE LAS VEGAS NV 1026 AM PDT WED JUL 6 2011 ...THUNDERSTORMS WILL BRING HEAVY RAIN ACROSS PARTS OF EASTERN CALIFORNIA...NORTHWEST ARIZONA AND SOUTHERN NEVADA TODAY... .WELL ABOVE NORMAL MOISTURE VALUES ARE IN PLACE ACROSS THE MOJAVE DESERT AND SOUTHERN GREAT BASIN. SCATTERED THUNDERSTORMS WITH HEAVY RAIN ARE POSSIBLE IN PARTS OF EASTERN INYO...THE SOUTHERN HALF OF NYE...NORTHERN SAN BERNARDINO... CLARK AND MOST OF MOHAVE COUNTIES THIS AFTERNOON AND EVENING. AZZ001-003-036-CAZ523-524-NVZ016-018>022-070200- /O.EXA.KVEF.FF.A.0002.110706T1900Z-110707T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NORTHWEST PLATEAU-NORTHWEST DESERTS- LAKE MEAD NATIONAL RECREATION AREA-WESTERN MOJAVE DESERT- EASTERN MOJAVE DESERT-NORTHEAST CLARK COUNTY-SHEEP RANGE- SPRING MOUNTAINS-RED ROCK CANYON-LAS VEGAS VALLEY- SOUTHERN CLARK COUNTY- 1026 AM PDT WED JUL 6 2011 /1026 AM MST WED JUL 6 2011/ ...FLASH FLOOD WATCH IN EFFECT UNTIL 10 PM PDT /10 PM MST/ THIS EVENING... THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS EXPANDED THE * FLASH FLOOD WATCH TO INCLUDE PORTIONS OF NORTHWEST ARIZONA... CALIFORNIA AND SOUTHERN NEVADA...INCLUDING THE FOLLOWING AREAS...IN NORTHWEST ARIZONA...LAKE MEAD NATIONAL RECREATION AREA...NORTHWEST DESERTS AND NORTHWEST PLATEAU. IN CALIFORNIA...EASTERN MOJAVE DESERT AND WESTERN MOJAVE DESERT. IN SOUTHERN NEVADA...LAKE MEAD NATIONAL RECREATION AREA...LAS VEGAS VALLEY...NORTHEAST CLARK COUNTY...SHEEP RANGE...SOUTHERN CLARK COUNTY AND SPRING MOUNTAINS-RED ROCK CANYON. * UNTIL 10 PM PDT /10 PM MST/ THIS EVENING * WELL ABOVE NORMAL MOISTURE VALUES ARE IN PLACE WITHIN THE WATCH AREA. ANY THUNDERSTORMS THAT DEVELOP WILL GENERATE HEAVY RAINFALL AND WILL BE SLOW MOVING. RAINFALL AMOUNTS OF UP TO 2 INCHES IN AN HOUR COULD OCCUR. * MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY SINCE FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION AND PERSONS IN AND NEAR THE WATCH AREA SHOULD BE ALERT TO THE POTENTIAL FOR HEAVY RAINFALL. && $$ CAZ522-NVZ014-017-070200- /O.CON.KVEF.FF.A.0002.110706T1900Z-110707T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DEATH VALLEY NATIONAL PARK-ESMERALDA AND CENTRAL NYE COUNTY- WESTERN CLARK AND SOUTHERN NYE COUNTY- 1026 AM PDT WED JUL 6 2011 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM PDT THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF CALIFORNIA AND NEVADA...INCLUDING THE FOLLOWING AREAS...IN CALIFORNIA...DEATH VALLEY NATIONAL PARK. IN NEVADA...ESMERALDA AND CENTRAL NYE COUNTY AND WESTERN CLARK AND SOUTHERN NYE COUNTY. * UNTIL 10 PM PDT THIS EVENING * WELL ABOVE NORMAL MOISTURE VALUES ARE IN PLACE WITHIN THE WATCH AREA. ANY THUNDERSTORMS THAT DEVELOP WILL GENERATE HEAVY RAINFALL AND BE SLOW MOVING. RAINFALL AMOUNTS OF UP TO 2 INCHES IN AN HOUR COULD OCCUR. * MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY SINCE FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION AND PERSONS IN AND NEAR THE WATCH AREA SHOULD BE ALERT TO THE POTENTIAL FOR HEAVY RAINFALL. && $$ JJ
051 WGUS65 KVEF 070123 FFAVEF FLOOD WATCH NATIONAL WEATHER SERVICE LAS VEGAS NV 623 PM PDT WED JUL 6 2011 ...THUNDERSTORMS WILL BRING HEAVY RAIN ACROSS PARTS OF EASTERN CALIFORNIA...NORTHWEST ARIZONA AND SOUTHERN NEVADA THROUGH THIS EVENING... .WELL ABOVE NORMAL MOISTURE VALUES ARE IN PLACE ACROSS THE MOJAVE DESERT AND SOUTHERN GREAT BASIN. SCATTERED THUNDERSTORMS WITH HEAVY RAIN ARE POSSIBLE IN PARTS OF INYO...SOUTHERN AND CENTRAL NYE...NORTHERN SAN BERNARDINO... CLARK AND MOST OF MOHAVE COUNTY THROUGH THIS EVENING. AZZ001-003-036-CAZ522>524-NVZ014-016>022-070500- /O.CON.KVEF.FF.A.0002.000000T0000Z-110707T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NORTHWEST PLATEAU-NORTHWEST DESERTS- LAKE MEAD NATIONAL RECREATION AREA-DEATH VALLEY NATIONAL PARK- WESTERN MOJAVE DESERT-EASTERN MOJAVE DESERT- ESMERALDA AND CENTRAL NYE COUNTY-NORTHEAST CLARK COUNTY- WESTERN CLARK AND SOUTHERN NYE COUNTY-SHEEP RANGE- SPRING MOUNTAINS-RED ROCK CANYON-LAS VEGAS VALLEY- SOUTHERN CLARK COUNTY- 623 PM PDT WED JUL 6 2011 /623 PM MST WED JUL 6 2011/ ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM PDT /10 PM MST/ THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTHWEST ARIZONA...CALIFORNIA AND NEVADA... INCLUDING THE FOLLOWING AREAS...IN NORTHWEST ARIZONA...LAKE MEAD NATIONAL RECREATION AREA...NORTHWEST DESERTS AND NORTHWEST PLATEAU. IN CALIFORNIA...DEATH VALLEY NATIONAL PARK...EASTERN MOJAVE DESERT AND WESTERN MOJAVE DESERT. IN NEVADA...ESMERALDA AND CENTRAL NYE COUNTY...LAKE MEAD NATIONAL RECREATION AREA...LAS VEGAS VALLEY...NORTHEAST CLARK COUNTY... SHEEP RANGE...SOUTHERN CLARK COUNTY...SPRING MOUNTAINS-RED ROCK CANYON AND WESTERN CLARK AND SOUTHERN NYE COUNTY. * UNTIL 10 PM PDT /10 PM MST/ THIS EVENING * WELL ABOVE NORMAL MOISTURE VALUES ARE IN PLACE WITHIN THE WATCH AREA. ANY THUNDERSTORMS THAT DEVELOP WILL GENERATE HEAVY RAINFALL AND WILL BE SLOW MOVING. RAINFALL AMOUNTS OF UP TO 2 INCHES IN AN HOUR COULD OCCUR. * MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY SINCE FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION AND PERSONS IN AND NEAR THE WATCH AREA SHOULD BE ALERT TO THE POTENTIAL FOR HEAVY RAINFALL. && $$
071 WGUS65 KVEF 070440 FFAVEF FLOOD WATCH NATIONAL WEATHER SERVICE LAS VEGAS NV 940 PM PDT WED JUL 6 2011 AZZ001-003-036-CAZ522>524-NVZ014-016>022-070545- /O.EXP.KVEF.FF.A.0002.000000T0000Z-110707T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NORTHWEST PLATEAU-NORTHWEST DESERTS- LAKE MEAD NATIONAL RECREATION AREA-DEATH VALLEY NATIONAL PARK- WESTERN MOJAVE DESERT-EASTERN MOJAVE DESERT- ESMERALDA AND CENTRAL NYE COUNTY-NORTHEAST CLARK COUNTY- WESTERN CLARK AND SOUTHERN NYE COUNTY-SHEEP RANGE- SPRING MOUNTAINS-RED ROCK CANYON-LAS VEGAS VALLEY- SOUTHERN CLARK COUNTY- 940 PM PDT WED JUL 6 2011 /940 PM MST WED JUL 6 2011/ ...FLASH FLOOD WATCH WILL EXPIRE AT 10 PM PDT /10 PM MST/ THIS EVENING... THE FLASH FLOOD WATCH FOR PORTIONS OF NORTHWEST ARIZONA... SOUTHEAST CALIFORNIA AND SOUTHERN NEVADA WILL EXPIRE AT 10 PM PDT /10 PM MST/ THIS EVENING. SCATTERED SHOWERS WITH ISOLATED THUNDERSTORMS WILL CONTINUE THROUGH THE NIGHT ACROSS PORTIONS OF THE AREA...MAINLY ACROSS EASTERN INYO...ESMERALDA...SOUTHERN NYE AND LINCOLN COUNTIES. ISOLATED AREAS OF GENERALLY NUISANCE FLOODING IS STILL POSSIBLE BUT THE THREAT OF SIGNIFICANT FLASH FLOODING IS SMALL. $$
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 8:45 PM PDT | Areal Flood Advisory | VEF | Clark, Nye | 2 hr |
| Jul 6, 12:04 AM PDT | Severe Thunderstorm Warning | VEF | Clark | 41 min |
| Jul 6, 12:15 AM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| Jul 6, 10:58 AM PDT | Areal Flood Advisory | VEF | Clark, Nye | 66 min |
| Jul 6, 12:25 PM PDT | Areal Flood Advisory | VEF | Esmeralda, Lincoln, Nye | 3 hr |
| Jul 6, 12:49 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 26 min |
| Jul 6, 1:01 PM PDT | Areal Flood Advisory | VEF | Clark, Nye | 21 min |
| Jul 6, 1:19 PM PDT | Flash Flood Warning | VEF | Clark | 80 min |
| Jul 6, 2:05 PM PDT | Areal Flood Advisory | VEF | Lincoln | 3 hr |
| Jul 6, 3:10 PM PDT | Areal Flood Advisory | VEF | Lincoln | 2 hr |
| Jul 6, 3:26 PM PDT | Areal Flood Advisory | VEF | Esmeralda, Lincoln, Nye | 2 hr |
| Jul 5, 11:19 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 76 min |
| Jul 5, 11:49 PM PDT | Flash Flood Warning | VEF | San Bernardino | 116 min |
| Jul 6, 12:14 PM PDT | Areal Flood Advisory | VEF | Inyo | 2 hr |
| Jul 6, 12:31 PM PDT | Areal Flood Advisory | VEF | Inyo | 119 min |
| Jul 6, 1:12 PM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Jul 6, 1:29 PM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Jul 6, 4:07 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 6, 4:12 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 6, 4:55 PM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Jul 5, 6:18 PM PDT | Flash Flood Warning | VEF | Mohave | 50 min |
| Jul 5, 6:23 PM PDT | Flash Flood Warning | VEF | Mohave | 82 min |
| Jul 6, 1:39 PM PDT | Flash Flood Warning | VEF | Mohave | 39 min |
Nearby
Flash Flood Watches in Nevada, 2011Flash Flood Watches in California, 2011Flash Flood Watches in Arizona, 2011Every flash flood watch in 2011
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.