Two more people in the Las Vegas Valley died of heat complications at the end of a particularly hot period.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS VEF wrote it up.
Two more people in the Las Vegas Valley died of heat complications at the end of a particularly hot period.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Las Vegas, NV wrote its last area forecast discussion before the first event at Aug 13, 10:29 PM PST, 1 hour 31 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 1129 PM PDT MON AUG 13 2012 .SYNOPSIS...SLIGHTLY DRIER AIR IS FORECAST TO MOVE OVER THE REGION THROUGH THE WEEK...HOWEVER ISOLATED AFTERNOON AND EVENING THUNDERSTORMS ARE STILL EXPECTED MAINLY OVER THE MOUNTAINS. MOISTURE MAY MOVE BACK INTO THE REGION BY THE WEEKEND...RESULTING IN AN INCREASE IN THUNDERSTORM CHANCES. ABOVE NORMAL TEMPERATURES WILL COOL TO NEAR NORMAL BY FRIDAY AND OVER THE WEEKEND. && .UPDATE...SHOWERS CONTINUE ACROSS NORTHEAST CLARK COUNTY AND ARE INCREASING OVER NORTHERN MOHAVE COUNTY. UPDATED POP/WX GRIDS FOR THE REST OF TONIGHT FOR EASTERN LINCOLN...NORTHEAST CLARK AND NORTHERN MOHAVE COUNTIES. NO CHANGES ELSEWHERE. && .PREV UPDATE... 900 PM PDT MON AUG 13 2012 .UPDATE...NORTHERN LINCOLN COUNTY SHOULD REMAIN THE MOST ACTIVE AREA OVERNIGHT DUE TO PROXIMITY OF BETTER SHEAR PROVIDED BY JET OVER NORTHEAST NEVADA. A FEW OF THE STRONGER STORMS HAVE PRODUCED RAINFALL RATES AROUND A THIRD OF AN INCH AN HOUR. THUNDERSTORMS ARE MOVING TO THE EAST AT 10 TO 20 MPH. THAT MOTION WILL LIMIT THE POTENTIAL OF FLOODING...BUT LOCALIZED AREA OF STANDING WATER IN LOW LYING AREAS CAN NOT BE RULED OUT. ELSEWHERE...AN EAST-WEST LINE OF SHOWERS AND THUNDERSTORMS FROM NEAR LAUGHLIN TO KINGMAN WILL CONTINUE TO WEAKEN AS IT MOVES NORTH OVER THE NEXT TWO HOURS. && .AVIATION...FOR MCCARRAN...THUNDERSTORMS ARE NOT EXPECTED WITHIN THE VALLEY OVERNIGHT...BUT OCCASIONAL GUSTY WINDS UP TO 25KTS WILL BE POSSIBLE DUE TO VARIOUS OUTFLOW BOUNDARIES. OUTSIDE OF OUTFLOW WINDS THE GENERAL WIND DIRECTION OVERNIGHT WILL BE SOUTHWEST WITH SPEEDS 7-9KTS. NEARLY THE SAME CONDITIONS EXPECTED TUESDAY WITH ISOLATED THUNDERSTORMS OVER THE MOUNTAINS AND OCCASIONAL GUSTY AND ERRATIC WINDS DUE TO OUTFLOW BOUNDARIES. SOUTH WINDS 8-12KTS EXPECTED TUESDAY. TEMPERATURES WILL CLIMB TO ABOVE 100 DEG F AFTER 18Z AND DROP BELOW AFTER 05Z. FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA...ISOLATED THUNDERSTORMS ARE EXPECTED TO CONTINUE THROUGH MIDNIGHT WITH GRADUAL DECREASE OVERNIGHT. GUSTY AND ERRATIC WINDS WILL BE POSSIBLE THROUGH THE NIGHT DUE TO OUTFLOW BOUNDARIES...BUT THE GENERAL WIND WILL BE UNDER 10KTS. CONDITIONS EXPECTED TO BE THE SAME ON TUESDAY WITH ISOLATED TO SCATTERED THUNDERSTORMS AND OCCASIONAL GUSTY WINDS. OUTSIDE OF THUNDERSTORM INFLUENCES...WINDS SHOULD FAVOR A SOUTHERLY DIRECTION AROUND 10-15KTS. CLOUDS GENERALLY SCT-BKN AOA 10K FEET EXCEPT VCNTY OF THUNDERSTORMS. && .PREV DISCUSSION... 251 PM PDT MON AUG 13 2012 .SHORT TERM...TONIGHT THROUGH WEDNESDAY NIGHT...MUCH LESS ACTIVITY TODAY THAN THE PAST COUPLE OF DAYS WITH AFTERNOON CONVECTION SO FAR BEING CONFINED MAINLY TO THE MOUNTAINS. ADDITIONAL AFTERNOON HEATING AND OUTFLOW BOUNDARIES WILL KEEP ISOLATED/SCATTERED CONVECTION GOING THROUGH THE EVENING BEFORE DECREASING OVERNIGHT. ON TUESDAY THE STRONG RIDGE WHICH REMAINS OVER THE AREA WILL WEAKEN SLIGHTLY AS A WEAK CUT-OFF LOW OFF THE CENTRAL CALIFORNIA COAST BEGINS TO HAVE A LITTLE MORE DEFINITION. THIS LOW WILL BE RESPONSIBLE FOR TURNING THE FLOW ALOFT SLIGHTLY MORE SOUTHWESTERLY...WHICH BRINGS DRIER AIR TO AT LEAST THE WESTERN PORTION OF THE CWA BOTH TUESDAY AND WEDNESDAY. PRECIPITABLE WATER IS FORECAST TO DROP FROM THE GENERAL 1 INCH OR GREATER VALUES OF THIS AFTERNOON ACROSS THE CWA TO GENERALLY LESS THAN 0.75 INCHES BY WEDNESDAY AFTERNOON. STABILITY WILL INCREASE IS ALSO EXPECTED TO ACCOMPANY THE DRYING...WHICH RESULTS IN LESS THUNDERSTORM ACTIVITY BOTH ON TUESDAY AND WEDNESDAY. ALTHOUGH LESS ACTIVITY WILL BE SEEN...ISOLATED/SCATTERED THUNDERSTORMS ARE STILL EXPECTED OVER THE HIGHER TERRAIN ACROSS MUCH OF THE CWA ON TUESDAY WITH WEDNESDAY SEEING THE MAIN ACTIVITY BEING OVER THE SOUTHERN SIERRA...EAST INTO LINCOLN COUNTY AND OVER NORTHERN MOHAVE COUNTY. VERY LITTLE CHANGE EXPECTED FOR THE DAYTIME TEMPERATURES BOTH TUESDAY AND WEDNESDAY AS ABOVE NORMAL READINGS CONTINUE. .LONG TERM...THURSDAY THROUGH MONDAY...MODELS ARE IN FAIR AGREEMENT WITH THE GENERAL PATTERN WITH HIGH PRESSURE OVER THE SOUTHWEST U.S. HOWEVER...MINOR CHANGES IN THE POSITIONING OF THE HIGH CENTER CAUSE DIFFERENCES IN THE EXACT LOCATION OF THE MOIST AND UNSTABLE AIR VERSUS THE DRY AND STABLE AIR. THE GFS IS TRENDING TOWARD A MORE WESTERLY COMPONENT WITH THE FLOW AND DRYING MUCH OF THE AREA OUT AT LEAST THURSDAY AND FRIDAY. THE NAM12 THURSDAY AND THE ECMWF THROUGH THE PERIOD ARE GENERALLY KEEPING A MORE MOIST AND UNSTABLE AIR MASS OVER THE AREA. I REALLY AM HAVING TROUBLE SEEING MOISTURE GETTING TOTALLY FLUSHED OUT WITH THE HIGH REMAINING IN THE GENERAL VICINITY SO I LEANED TOWARD THE MORE MOIST AND UNSTABLE IDEA...KEEPING A SLIGHT CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS OVER MOST OF THE AREA THROUGH THE LONG TERM. TEMPERATURES WILL REMAIN AT OR SLIGHTLY ABOVE NORMAL WITH THE RELATIVELY HIGH HEIGHTS. && .VEF WATCHES/WARNINGS/ADVISORIES... NV...NONE. AZ...NONE. CA...NONE. && UPDATE...PIERCE AVIATION...GORELOW PREV DISCUSSION...JENSEN/HARRISON HTTP://WEATHER.GOV/LASVEGAS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAS VEGAS NV 411 AM PDT MON AUG 13 2012 AZZ001>003-036-CAZ519>527-NVZ014>022-140700- NORTHWEST PLATEAU-LOWER COLORADO RIVER VALLEY-NORTHWEST DESERTS- LAKE MEAD NATIONAL RECREATION AREA-EASTERN SIERRA SLOPES- OWENS VALLEY-WHITE MOUNTAINS OF INYO COUNTY- DEATH VALLEY NATIONAL PARK-WESTERN MOJAVE DESERT- EASTERN MOJAVE DESERT-MORONGO BASIN-CADIZ BASIN- SAN BERNARDINO COUNTY-UPPER COLORADO RIVER VALLEY- ESMERALDA AND CENTRAL NYE COUNTY-LINCOLN COUNTY- NORTHEAST CLARK COUNTY-WESTERN CLARK AND SOUTHERN NYE COUNTY- SHEEP RANGE-SPRING MOUNTAINS-LAS VEGAS VALLEY- SOUTHERN CLARK COUNTY- 411 AM PDT MON AUG 13 2012 /411 AM MST MON AUG 13 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST ARIZONA...SOUTHEAST CALIFORNIA AND SOUTHERN NEVADA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE EXPECTED TO INITIALLY DEVELOP OVER THE MOUNTAINS DURING THE LATE MORNING AND EARLY AFTERNOON THEN INCREASE IN COVERAGE THROUGH THE EVENING HOURS. THUNDERSTORMS ARE EXPECTED TO MOVE SLOWLY TO THE NORTH OR NORTHEAST AND THE PRIMARY HAZARD WILL BE HEAVY RAIN LEADING TO POSSIBLE FLASH FLOODING WITH A FEW STORMS. THERE WILL ALSO BE THE POTENTIAL FOR ISOLATED STRONG WIND GUSTS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THUNDERSTORM COVERAGE WILL DECREASE SOMEWHAT ACROSS SOUTHEAST CALIFORNIA AND SOUTHERN NEVADA TUESDAY THROUGH THURSDAY THEN MONSOONAL MOISTURE IS EXPECTED TO INCREASE GOING INTO THE WEEKEND FOR ISOLATED TO SCATTERED THUNDERSTORMS ACROSS THE REGION. .SPOTTER INFORMATION STATEMENT... THERE IS A POSSIBILITY OF SPOTTER ACTIVATION TODAY THOUGH CONFIDENCE IS NOT HIGH IN ANY PARTICULAR LOCATION. SPOTTERS ARE ALSO ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The national radar mosaic for the moment the first event began.
1 heat. Local standard time, as filed.
Two more people in the Las Vegas Valley died of heat complications.
As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.
| Event | Date | Age | Sex | Where | Kind |
|---|---|---|---|---|---|
| Heat, Las Vegas Valley | 2012-08-15 | 64 | Female | Outside/Open Areas | Direct |
| Heat, Las Vegas Valley | 2012-08-14 | 37 | Male | Permanent Structure | Direct |
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2012Every state in 2012This day in weather historyWarnings in Nevada, August 2012
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 406466.