Excessive Heat Warning — Pointe Coupee, LA, West Feliciana, LA, East Feliciana, LA, St. Helena, LA, Washington, LA, Iberville, LA, West Baton Rouge, LA, East Baton Rouge, LA, Assumption, LA, St. James, LA, St. John The Baptist, LA, Upper St. Bernard, LA, Lower St. Bernard, LA, Northern Tangipahoa, LA, Southeast St. Tammany, LA, Western Orleans, LA, Eastern Orleans, LA, Northern St. Tammany, LA, Southwestern St. Tammany, LA, Central Tangipahoa, LA, Lower Tangipahoa, LA, Northern Livingston, LA, Southern Livingston, LA, Western Ascension, LA, Eastern Ascension, LA, Upper Jefferson, LA, Upper Plaquemines, LA, Central Plaquemines, LA, Lower Plaquemines, LA, Central Jefferson, LA, Coastal Jefferson, LA, Upper Lafourche, LA, Lower Lafourche, LA, Upper Terrebonne, LA, Lower Terrebonne, LA, Upper St. Charles, LA, Central St. Charles, LA, Lower St. Charles, LA, Wilkinson, MS, Amite, MS, Pike, MS, Walthall, MS, Pearl River, MS 8:00 PM

St. James Parish, Louisiana, United States

Last updated: 5:36 PM CDT  ·  Refresh
30°C
Feels like 37°
Partly Cloudy
▲ 34°  /  ▼ 24°
Wind
8 mph WNW
Humidity
78%
Dew Point
26°
Pressure
29.77 inHg
Visibility
10 mi
UV Index
5.7
Cloud Cover
36%
Sunrise
6:15 AM
Sunset
8:03 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: St. James Parish is currently partly cloudy at 30°C. Precipitation is likely — peak probability 79% around 7 PM. Atmospheric instability is elevated (CAPE up to 2966 J/kg) — isolated convective development possible. Sunrise: 6:15AM · Sunset: 8:03PM.

Alerts

Excessive Heat Warning
Pointe Coupee, LA, West Feliciana, LA, East Feliciana, LA, St. Helena, LA, Washington, LA, Iberville, LA, West Baton Rouge, LA, East Baton Rouge, LA, Assumption, LA, St. James, LA, St. John The Baptist, LA, Upper St. Bernard, LA, Lower St. Bernard, LA, Northern Tangipahoa, LA, Southeast St. Tammany, LA, Western Orleans, LA, Eastern Orleans, LA, Northern St. Tammany, LA, Southwestern St. Tammany, LA, Central Tangipahoa, LA, Lower Tangipahoa, LA, Northern Livingston, LA, Southern Livingston, LA, Western Ascension, LA, Eastern Ascension, LA, Upper Jefferson, LA, Upper Plaquemines, LA, Central Plaquemines, LA, Lower Plaquemines, LA, Central Jefferson, LA, Coastal Jefferson, LA, Upper Lafourche, LA, Lower Lafourche, LA, Upper Terrebonne, LA, Lower Terrebonne, LA, Upper St. Charles, LA, Central St. Charles, LA, Lower St. Charles, LA, Wilkinson, MS, Amite, MS, Pike, MS, Walthall, MS, Pearl River, MS
Expires 8:00 PM
67 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
30°
56%
6 PM
32°
72%
7 PM
32°
79%
8 PM
31°
72%
9 PM
28°
71%
10 PM
28°
43%
11 PM
28°
27%
12 AM
28°
21%
1 AM
27°
9%
2 AM
27°
12%
3 AM
27°
12%
4 AM
27°
13%
5 AM
25°
13%
6 AM
24°
10%
7 AM
26°
14%
8 AM
27°
23%
9 AM
28°
24%
10 AM
29°
28%
11 AM
31°
31%
12 PM
32°
37%
1 PM
32°
40%
2 PM
32°
48%
3 PM
32°
49%
4 PM
31°
52%
7-Day Forecast
Today
34° 24°
Partly Cloudy with a 72% chance of rain.
Wed
34° 24°
Mostly Cloudy with a 65% chance of rain.
Thu
32° 26°
Partly Cloudy with a 72% chance of rain.
Fri
33° 24°
Partly Cloudy with a 52% chance of rain.
Sat
33° 23°
Drizzle, 59% chance.
Sun
33° 23°
Mostly Cloudy with a 20% chance of rain.
Mon
34° 24°
Clear with a 20% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 30° Partly Cloudy 56% 8 mph WNW 78%
6 PM 32° Partly Cloudy 72% 8 mph WNW 83%
7 PM 32° Rain 79% 8 mph NW 86%
8 PM 31° Heavy Rain 72% 9 mph NW 88%
9 PM 28° Heavy Rain 71% 9 mph NW 90%
10 PM 28° Mostly Cloudy 43% 8 mph NW 90%
11 PM 28° Partly Cloudy 27% 6 mph NW 90%
12 AM 28° Partly Cloudy 21% 6 mph NNW 90%
1 AM 27° Partly Cloudy 9% 6 mph NNW 90%
2 AM 27° Partly Cloudy 12% 6 mph NW 91%
3 AM 27° Partly Cloudy 12% 7 mph NW 92%
4 AM 27° Partly Cloudy 13% 7 mph NNW 92%
5 AM 25° Partly Cloudy 13% 8 mph NNW 91%
6 AM 24° Partly Cloudy 10% 8 mph NNW 90%
7 AM 26° Partly Cloudy 14% 9 mph NNW 86%
8 AM 27° Partly Cloudy 23% 10 mph N 82%
9 AM 28° Partly Cloudy 24% 11 mph N 77%
10 AM 29° Partly Cloudy 28% 12 mph N 73%
11 AM 31° Partly Cloudy 31% 13 mph N 70%
12 PM 32° Partly Cloudy 37% 14 mph N 67%
1 PM 32° Partly Cloudy 40% 14 mph N 67%
2 PM 32° Partly Cloudy 48% 14 mph NNE 69%
3 PM 32° Mostly Cloudy 49% 14 mph NNE 71%
4 PM 31° Mostly Cloudy 52% 14 mph NNE 73%
15-Day Forecast
Today
7/21
Partly Cloudy
72%
24°
34°
Wed
7/22
Mostly Cloudy
65%
24°
34°
Thu
7/23
Partly Cloudy
72%
26°
32°
Fri
7/24
Partly Cloudy
52%
24°
33°
Sat
7/25
Drizzle
59%
23°
33°
Sun
7/26
Mostly Cloudy
20%
23°
33°
Mon
7/27
Clear
20%
24°
34°
Tue
7/28
Mostly Clear
17%
24°
35°
Wed
7/29
Drizzle
60%
24°
35°
Thu
7/30
Rain
82%
24°
34°
Fri
7/31
Drizzle
54%
24°
34°
Sat
8/1
Drizzle
60%
23°
34°
Sun
8/2
Drizzle
60%
24°
34°
Mon
8/3
Drizzle
60%
23°
33°
Tue
8/4
Drizzle
60%
24°
34°
67
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
67 AQI 17.5 µg/m³
O3
Ground-level ozone
30 AQI 32 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 67 Moderate 30 67
Thu 53 Moderate 29 53
Fri 46 Good 29 46
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 Jul 21, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3735 J/kg
MLCAPE3133 J/kg
MUCAPE3735 J/kg
SBCIN-36 J/kg
MLCIN0 J/kg
Lifted Index-5.8
Kinematics
0–6 km Shear26 kt
0–1 km Shear14 kt
Eff. Shear35 kt
0–1 km SRH30
0–3 km SRH-24
Eff. SRH-24
Storm Motion352° @ 32 kt
0–1 km EHI0.7
Composite Parameters
Sig. Tornado0.5
STP (eff)0.0
Supercell0.0
K-Index33.4
Thermo & Levels
PWAT2.36 in
0–3 km LR5.8 °C/km
700–500 LR5.2 °C/km
Total Totals44.8
LCL961 hPa
LFC893 hPa
EL122 hPa
Freezing Lvl17,575 ft