Excessive Heat Watch 10:00 PM Excessive Heat Warning — Imperial County Southwest, CA, Salton Sea, CA, Chuckwalla Mountains, CA, Imperial County Southeast, CA, Imperial County West, CA, Imperial Valley, CA, Chiriaco Summit, CA, Palo Verde Valley, CA, Chuckwalla Valley, CA, Joshua Tree NP West, CA, Joshua Tree NP East, CA, Aguila Valley, AZ, Tonopah Desert, AZ, Gila Bend, AZ, Cave Creek/New River, AZ, New River Mesa, AZ, Rio Verde/Salt River, AZ, Fountain Hills/East Mesa, AZ, Superior, AZ, Northwest Pinal County, AZ, West Pinal County, AZ, Apache Junction/Gold Canyon, AZ, Sonoran Desert Natl Monument, AZ, Northwest Valley, AZ, Buckeye/Avondale, AZ, Deer Valley, AZ, Central Phoenix, AZ, North Phoenix/Glendale, AZ, Scottsdale/Paradise Valley, AZ, East Valley, AZ, South Mountain/Ahwatukee, AZ, Southeast Valley/Queen Creek, AZ 10:00 PM

Tonopah Desert, Maricopa County, Arizona, United States

Last updated: 7:56 PM CDT  ·  Refresh
39°C
Feels like 41°
Mostly Clear
▲ 41°  /  ▼ 27°
Wind
4 mph SSW
Humidity
27%
Dew Point
16°
Pressure
28.38 inHg
Visibility
10 mi
UV Index
4.4
Cloud Cover
18%
Sunrise
5:36 AM
Sunset
7:38 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Tonopah Desert is currently mostly clear at 40°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 561 J/kg) — isolated convective development possible. Sunrise: 5:36AM · Sunset: 7:38PM.

Alerts

Excessive Heat Watch
Expires 10:00 PM
Excessive Heat Warning
Imperial County Southwest, CA, Salton Sea, CA, Chuckwalla Mountains, CA, Imperial County Southeast, CA, Imperial County West, CA, Imperial Valley, CA, Chiriaco Summit, CA, Palo Verde Valley, CA, Chuckwalla Valley, CA, Joshua Tree NP West, CA, Joshua Tree NP East, CA, Aguila Valley, AZ, Tonopah Desert, AZ, Gila Bend, AZ, Cave Creek/New River, AZ, New River Mesa, AZ, Rio Verde/Salt River, AZ, Fountain Hills/East Mesa, AZ, Superior, AZ, Northwest Pinal County, AZ, West Pinal County, AZ, Apache Junction/Gold Canyon, AZ, Sonoran Desert Natl Monument, AZ, Northwest Valley, AZ, Buckeye/Avondale, AZ, Deer Valley, AZ, Central Phoenix, AZ, North Phoenix/Glendale, AZ, Scottsdale/Paradise Valley, AZ, East Valley, AZ, South Mountain/Ahwatukee, AZ, Southeast Valley/Queen Creek, AZ
Expires 10:00 PM
44 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
39°
15%
6 PM
41°
11%
7 PM
39°
3%
8 PM
38°
4%
9 PM
37°
4%
10 PM
36°
4%
11 PM
36°
4%
12 AM
34°
4%
1 AM
34°
4%
2 AM
33°
3%
3 AM
33°
3%
4 AM
31°
3%
5 AM
32°
3%
6 AM
33°
3%
7 AM
35°
3%
8 AM
36°
3%
9 AM
38°
3%
10 AM
39°
3%
11 AM
39°
3%
12 PM
42°
3%
1 PM
43°
3%
2 PM
43°
3%
3 PM
43°
3%
4 PM
43°
3%
7-Day Forecast
Today
41° 27°
Mostly Clear.
Thu
44° 31°
Clear.
Fri
47° 33°
Clear.
Sat
48° 32°
Clear with a 21% chance of rain.
Sun
38° 31°
Partly Cloudy.
Mon
42° 29°
Drizzle, 51% chance.
Tue
42° 31°
Rain, 41% chance.
TimeTempConditionsPrecipWindHumidity
Now 39° Mostly Clear 15% 4 mph SSW 27%
6 PM 41° Mostly Clear 11% 5 mph SE 28%
7 PM 39° Clear 3% 7 mph ESE 29%
8 PM 38° Clear 4% 6 mph ESE 30%
9 PM 37° Mostly Clear 4% 6 mph E 31%
10 PM 36° Mostly Clear 4% 4 mph ENE 32%
11 PM 36° Mostly Clear 4% 4 mph NE 33%
12 AM 34° Clear 4% 4 mph NE 34%
1 AM 34° Clear 4% 4 mph NE 36%
2 AM 33° Clear 3% 4 mph NE 38%
3 AM 33° Clear 3% 5 mph NE 40%
4 AM 31° Clear 3% 5 mph NE 42%
5 AM 32° Clear 3% 6 mph NE 42%
6 AM 33° Clear 3% 5 mph ENE 39%
7 AM 35° Clear 3% 6 mph E 36%
8 AM 36° Clear 3% 6 mph E 32%
9 AM 38° Clear 3% 5 mph E 29%
10 AM 39° Clear 3% 5 mph ESE 25%
11 AM 39° Clear 3% 5 mph ESE 24%
12 PM 42° Clear 3% 5 mph ESE 23%
1 PM 43° Clear 3% 5 mph ESE 22%
2 PM 43° Clear 3% 5 mph ESE 21%
3 PM 43° Clear 3% 4 mph ESE 21%
4 PM 43° Clear 3% 4 mph SE 20%
15-Day Forecast
Today
7/22
Mostly Clear
15%
27°
41°
Thu
7/23
Clear
3%
31°
44°
Fri
7/24
Clear
3%
33°
47°
Sat
7/25
Clear
21%
32°
48°
Sun
7/26
Partly Cloudy
16%
31°
38°
Mon
7/27
Drizzle
51%
29°
42°
Tue
7/28
Rain
41%
31°
42°
Wed
7/29
Drizzle
44%
31°
43°
Thu
7/30
Rain
68%
31°
42°
Fri
7/31
Clear
40%
29°
41°
Sat
8/1
Drizzle
60%
29°
42°
Sun
8/2
Clear
25%
31°
42°
Mon
8/3
Drizzle
60%
31°
42°
Tue
8/4
Clear
60%
31°
41°
Wed
8/5
Drizzle
60%
31°
41°
44
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
22 AQI 4.0 µg/m³
O3
Ground-level ozone
Dominant
44 AQI 48 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 44 Good 44 22
Fri 47 Good 47 28
Sat 42 Good 42 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, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE571 J/kg
MLCAPE381 J/kg
MUCAPE571 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-1.4
Kinematics
0–6 km Shear9 kt
0–1 km Shear3 kt
Eff. Shear10 kt
0–1 km SRH-6
0–3 km SRH-25
Eff. SRH-25
Storm Motion330° @ 16 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado-0.0
STP (eff)0.0
Supercell0.0
K-Index40.0
Thermo & Levels
PWAT1.80 in
0–3 km LR9.5 °C/km
700–500 LR5.8 °C/km
Total Totals47.8
LCL682 hPa
LFC961 hPa
EL185 hPa
Freezing Lvl16,161 ft