Excessive Heat Watch 10:00 PM

Las Vegas Valley, Clark County, Nevada, United States

Last updated: 1:35 AM CDT  ·  Refresh
33°C
Feels like 32°
Mostly Clear
▲ 36°  /  ▼ 28°
Wind
6 mph NE
Humidity
31%
Dew Point
13°
Pressure
27.54 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
19%
Sunrise
5:38 AM
Sunset
7:54 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Las Vegas Valley is currently mostly clear at 33°C. Dry conditions are expected through the next 24 hours. Sunrise: 5:38AM · Sunset: 7:54PM.

Alerts

Excessive Heat Watch
Expires 10:00 PM
49 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
33°
5%
12 AM
32°
5%
1 AM
32°
3%
2 AM
31°
3%
3 AM
31°
3%
4 AM
31°
3%
5 AM
28°
3%
6 AM
29°
3%
7 AM
30°
3%
8 AM
31°
3%
9 AM
32°
3%
10 AM
33°
3%
11 AM
35°
3%
12 PM
36°
3%
1 PM
38°
3%
2 PM
39°
3%
3 PM
39°
3%
4 PM
39°
3%
5 PM
41°
3%
6 PM
40°
3%
7 PM
39°
3%
8 PM
39°
3%
9 PM
38°
3%
10 PM
38°
3%
7-Day Forecast
Tonight
36° 28°
Mostly Clear.
Wed
41° 28°
Clear.
Thu
42° 30°
Clear.
Fri
43° 32°
Clear.
Sat
44° 32°
Clear.
Sun
43° 31°
Clear.
Mon
42° 31°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 33° Mostly Clear 5% 6 mph NE 31%
12 AM 32° Partly Cloudy 5% 5 mph N 31%
1 AM 32° Mostly Cloudy 3% 5 mph NNE 32%
2 AM 31° Partly Cloudy 3% 5 mph NNE 34%
3 AM 31° Mostly Clear 3% 5 mph N 34%
4 AM 31° Mostly Clear 3% 5 mph NNW 35%
5 AM 28° Clear 3% 4 mph NNW 35%
6 AM 29° Clear 3% 2 mph NW 35%
7 AM 30° Clear 3% 3 mph SSE 34%
8 AM 31° Clear 3% 4 mph SE 31%
9 AM 32° Clear 3% 4 mph SSE 28%
10 AM 33° Clear 3% 4 mph SE 25%
11 AM 35° Clear 3% 4 mph SE 22%
12 PM 36° Clear 3% 5 mph SE 20%
1 PM 38° Clear 3% 5 mph SE 18%
2 PM 39° Clear 3% 5 mph SSE 17%
3 PM 39° Clear 3% 5 mph S 17%
4 PM 39° Clear 3% 6 mph SSW 16%
5 PM 41° Clear 3% 7 mph SSW 16%
6 PM 40° Clear 3% 7 mph SW 17%
7 PM 39° Clear 3% 8 mph SW 18%
8 PM 39° Clear 3% 7 mph SW 18%
9 PM 38° Clear 3% 6 mph SW 19%
10 PM 38° Mostly Clear 3% 5 mph SW 20%
15-Day Forecast
Today
7/21
Mostly Clear
5%
28°
36°
Wed
7/22
Clear
3%
28°
41°
Thu
7/23
Clear
3%
30°
42°
Fri
7/24
Clear
14%
32°
43°
Sat
7/25
Clear
3%
32°
44°
Sun
7/26
Clear
8%
31°
43°
Mon
7/27
Clear
8%
31°
42°
Tue
7/28
Clear
18%
31°
40°
Wed
7/29
Clear
18%
30°
41°
Thu
7/30
Clear
19%
31°
42°
Fri
7/31
Clear
19%
31°
41°
Sat
8/1
Clear
25%
31°
42°
Sun
8/2
Clear
25%
31°
40°
Mon
8/3
Clear
25%
30°
39°
Tue
8/4
Clear
3%
29°
39°
49
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
30 AQI 5.4 µg/m³
O3
Ground-level ozone
Dominant
49 AQI 54 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 49 Good 49 30
Thu 61 Moderate 61 31
Fri 45 Good 45 26
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Wed Jul 22, 05:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE7 J/kg
MUCAPE29 J/kg
SBCIN-412 J/kg
MLCIN0 J/kg
Lifted Index-0.1
Kinematics
0–6 km Shear8 kt
0–1 km Shear14 kt
Eff. Shear—
0–1 km SRH-32
0–3 km SRH4
Eff. SRH—
Storm Motion110° @ 13 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado-0.0
STP (eff)—
Supercell—
K-Index33.9
Thermo & Levels
PWAT1.45 in
0–3 km LR7.7 °C/km
700–500 LR6.9 °C/km
Total Totals47.6
LCL703 hPa
LFC513 hPa
EL493 hPa
Freezing Lvl14,478 ft