Excessive Heat Warning criteria were reached on three straight days.
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.
Excessive Heat Warning criteria were reached on three straight days.
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 Jul 11, 7:30 AM PST, 3 hours 30 minutes earlier.
Area Forecast Discussion National Weather Service Las Vegas NV 830 AM PDT Tue Jul 11 2023 .SYNOPSIS...Dry and breezy conditions contribute to elevated fire danger today and Wednesday across southern Nevada and northwest Arizona. Dangerous to extreme heat builds later in the week, lasting into early next week. At night, temperatures in urban areas will struggle to fall, resulting in little-to-no relief from the heat. During the day, all-time records may be threatened. && .UPDATE...Forecast appears to be on track for today with high temperatures a few degrees above normal, part of the warming trend expected through the week. Winds will pick up out of the south to southwest this afternoon. Cloud cover over Mohave County is starting to clear out. Confidence is still low in thunderstorm development but it cannot be ruled out. && .SHORT TERM...Today and Wednesday. Warm and breezy conditions continue as southwesterly flow persists aloft. With the building ridge pushing the jet farther north, winds at the surface are expected to be weaker than yesterday. Gusts of 20- 30 mph will lead to elevated fire weather conditions, but not strong enough to warrant an extension of the Red Flag Warning. There is also a low chance of isolated convection in far eastern Mohave County this afternoon as a subtle push of mid-level moisture comes out of northwestern Mexico. However, latest HREF doesn't seem too keen on this potential, especially as temperatures continue to warm aloft, with only 2 members producing very minimal showers in the area. As such, NBM PoPs there stand around 10%. Otherwise, temperatures remain a few degrees above normal for mid-July. Heat continues to slowly build on Wednesday as breezes remain elevated. PoPs in eastern Mohave County decrease below 10%. .LONG TERM...Thursday through next Tuesday. An intensifying, long-duration heat wave continues to be the main focus of the longer term period, with widespread high to extreme heat risk anticipated. On Thursday, a fairly broad ridge of high pressure will be anchored along the southern international border, but will gradually build north over the weekend to anchor itself nearly overhead with 500mb heights of near 600dm Sunday into Monday. A ridge of this intensity climbs into the top tier of strong ridges for the area, resulting in high confidence on a significant heat event which will certainty break some daily records, but could also challenge or exceed some all-time records. Needless to say, heat of this magnitude is dangerous even for those well-accustomed to the typical summertime heat of the Mojave Desert. We recommend everyone do their best to minimize outdoor exposure during the upcoming heat wave and to stay hydrated as well. By next week, the high pressure ridge may begin to shift east towards it's more typical Four corners location. Temperatures during this time will likely remain well above normal, though should trend downward from their peaks over the weekend. It's worth noting that about 40% of the cluster guidance remains a fairly anomalous ridge further west which could signal the heat wave may persist deeper into next week, while the other clusters suggest a more notable moderation. Meanwhile, the forecast remains dry while we wait for the monsoon to show signs of life. With the ridge shifting a little further east, monsoon moisture may not be too far behind, but we're not seeing a strong reflection of that just in the guidance. && .FIRE WEATHER...Dry and breezy conditions continue through Wednesday, resulting in elevated fire danger across southern Nevada and northwestern Arizona. Wind gusts of 20-30 mph are expected in the afternoons, while RHs remain between 5-15%. There is a low chance (around 10%) of isolated showers in far eastern Mohave County this afternoon. On Wednesday, these probabilities drop below 10%. Later in the week, we trade the breezy conditions for excessive heat. Major to extreme HeatRisk will make any prolonged outdoor activity dangerous. Minimum RH values decrease to 5-10% with wind gusts less than 20 mph. && .CLIMATE... Daily Temperature Records: *Record High (Most Recent Year of Occurrence)* |Thu (7/13)|Fri (7/14)|Sat (7/15)|Sun (7/16)|Mon (7/17) ------------|----------|----------|----------|----------|---------- Las Vegas |115 (1939)|116 (1972)|114 (2017)|116 (1998)|116 (2005) ------------|----------|----------|----------|----------|---------- Kingman |110 (2005)|110 (1972)|110 (1911)|110 (1998)|113 (2005) ------------|----------|----------|----------|----------|---------- Needles |123 (2005)|121 (2003)|121 (2006)|125 (1925)|125 (2005) ------------|----------|----------|----------|----------|---------- Daggett |115 (1972)|117 (1972)|114 (2006)|116 (1998)|117 (1998) ------------|----------|----------|----------|----------|---------- Bishop |107 (2020)|108 (1972)|109 (1972)|109 (1972)|107 (2006) ------------|----------|----------|----------|----------|---------- Death Valley|131 (1913)|128 (1972)|128 (1972)|127 (2005)|127 (2006) For Las Vegas: All-time record warm high: 117 (2021, 2017, 2013, 2005, 1942) All-time record warm low: 95 (2013, 2005) Consecutive days above 110: 10 days (1961) Consecutive days above 115: 4 days (2005) && .AVIATION...For Harry Reid...Light and variable wind through about 18Z this morning. A southerly wind is expected to increase after 18Z with some gusts up to 20 knots possible. That southerly wind direction could briefly come from 150-170 degrees. Winds will take on a more southwesterly direction after 21Z with gusts peaking up to 25 knots. Gusts will subside in the early evening but there could be a period of westerly gusts up to 20 kts between 05Z and 09Z tonight. No operationally significant clouds or weather expected. For the rest of southern Nevada, northwest Arizona and southeast California...Generally expect southerly wind gusts 15 to 25 knots in most areas this afternoon and early evening. Around Barstow area westerly winds will persist with higher gusts developing in the afternoon and evening. No operationally significant clouds or weather expected. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && UPDATE...Meltzer SHORT TERM...Woods LONG TERM...Outler AVIATION...Pierce For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter
1 excessive heat. Local standard time, as filed.
Excessive Heat Warning criteria were reached on three straight days.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2023Every state in 2023This day in weather historyWarnings in Nevada, July 2023
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: 1119104.