Excessive Heat Watch 10:00 PM Heat Advisory — Orange County Coastal, CA 10:00 PM

Fountain Valley, California

Last updated: 3:46 AM CDT  ·  Refresh
22°C
Feels like 25°
Mostly Clear
▲ 30°  /  ▼ 21°
Wind
3 mph SSW
Humidity
84%
Dew Point
21°
Pressure
29.85 inHg
Visibility
8 mi
UV Index
0.0
Cloud Cover
27%
Sunrise
6:20 AM
Sunset
7:26 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Fountain Valley is currently mostly clear at 22°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:20AM · Sunset: 7:26PM.

Alerts

Excessive Heat Watch
Expires 10:00 PM
Heat Advisory
Orange County Coastal, CA
Expires 10:00 PM
47 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
7%
2 AM
22°
3%
3 AM
22°
3%
4 AM
22°
3%
5 AM
20°
3%
6 AM
20°
6%
7 AM
21°
6%
8 AM
22°
6%
9 AM
23°
6%
10 AM
24°
6%
11 AM
26°
6%
12 PM
26°
6%
1 PM
29°
6%
2 PM
29°
6%
3 PM
29°
6%
4 PM
28°
6%
5 PM
29°
6%
6 PM
28°
6%
7 PM
28°
6%
8 PM
26°
6%
9 PM
23°
6%
10 PM
23°
7%
11 PM
23°
7%
12 AM
23°
7%
7-Day Forecast
Today
30° 21°
Partly Cloudy.
Wed
30° 21°
Partly Cloudy.
Thu
29° 19°
Partly Cloudy.
Fri
31° 21°
Partly Cloudy.
Sat
30° 21°
Clear.
Sun
28° 19°
Clear.
Mon
28° 18°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 22° Mostly Clear 7% 3 mph SSW 84%
2 AM 22° Mostly Cloudy 3% 2 mph SSW 83%
3 AM 22° Overcast 3% 2 mph SSW 83%
4 AM 22° Overcast 3% 3 mph S 83%
5 AM 20° Haze 3% 3 mph S 83%
6 AM 20° Fog 6% 3 mph S 82%
7 AM 21° Mostly Cloudy 6% 3 mph S 81%
8 AM 22° Partly Cloudy 6% 3 mph SSW 77%
9 AM 23° Partly Cloudy 6% 4 mph SW 70%
10 AM 24° Mostly Clear 6% 5 mph SW 64%
11 AM 26° Mostly Clear 6% 6 mph SW 60%
12 PM 26° Mostly Clear 6% 8 mph SW 57%
1 PM 29° Partly Cloudy 6% 8 mph SW 55%
2 PM 29° Mostly Clear 6% 8 mph WSW 55%
3 PM 29° Mostly Clear 6% 8 mph WSW 55%
4 PM 28° Mostly Clear 6% 8 mph WSW 56%
5 PM 29° Mostly Clear 6% 8 mph WSW 59%
6 PM 28° Mostly Clear 6% 8 mph SW 64%
7 PM 28° Mostly Clear 6% 7 mph SW 68%
8 PM 26° Mostly Clear 6% 7 mph SW 71%
9 PM 23° Mostly Clear 6% 6 mph SSW 72%
10 PM 23° Mostly Clear 7% 6 mph SSW 74%
11 PM 23° Mostly Clear 7% 6 mph SSW 75%
12 AM 23° Mostly Clear 7% 5 mph SSW 76%
15-Day Forecast
Today
8/25
Partly Cloudy
7%
21°
30°
Wed
8/26
Partly Cloudy
6%
21°
30°
Thu
8/27
Partly Cloudy
11%
19°
29°
Fri
8/28
Partly Cloudy
5%
21°
31°
Sat
8/29
Clear
3%
21°
30°
Sun
8/30
Clear
3%
19°
28°
Mon
8/31
Clear
8%
18°
28°
Tue
9/1
Drizzle
42%
18°
28°
Wed
9/2
Clear
44%
19°
31°
Thu
9/3
Drizzle
44%
21°
31°
Fri
9/4
Clear
25%
22°
29°
Sat
9/5
Drizzle
60%
22°
26°
Sun
9/6
Clear
60%
22°
26°
Mon
9/7
Clear
25%
22°
26°
Tue
9/8
Drizzle
60%
22°
26°
47
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
47 AQI 8.5 µg/m³
O3
Ground-level ozone
45 AQI 50 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 47 Good 45 47
Wed 50 Good 50 49
Thu 52 Moderate 51 52
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 Tue Aug 25, 07:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE13 J/kg
MLCAPE45 J/kg
MUCAPE14 J/kg
SBCIN-1054 J/kg
MLCIN0 J/kg
Lifted Index-0.3
Kinematics
0–6 km Shear14 kt
0–1 km Shear7 kt
Eff. Shear—
0–1 km SRH-25
0–3 km SRH-1
Eff. SRH—
Storm Motion273° @ 15 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index24.7
Thermo & Levels
PWAT1.32 in
0–3 km LR2.7 °C/km
700–500 LR7.5 °C/km
Total Totals43.5
LCL982 hPa
LFC551 hPa
EL457 hPa
Freezing Lvl15,568 ft