Heat Advisory — 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, Northern Hancock, MS, Northern Harrison, MS, Northern Jackson, MS, Southern Hancock, MS, Southern Harrison, MS, Southern Jackson, MS 7:00 PM

St. James Parish, Louisiana, United States

Last updated: 10:55 AM CDT  ·  Refresh
31°C
Feels like 37°
Mostly Clear
▲ 36°  /  ▼ 26°
Wind
6 mph NNW
Humidity
69%
Dew Point
26°
Pressure
29.85 inHg
Visibility
9 mi
UV Index
9.0
Cloud Cover
22%
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 mostly clear at 31°C. Precipitation is likely — peak probability 78% around 3 PM. Atmospheric instability is elevated (CAPE up to 2968 J/kg) — isolated convective development possible. Sunrise: 6:15AM · Sunset: 8:03PM.

Alerts

Heat Advisory
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, Northern Hancock, MS, Northern Harrison, MS, Northern Jackson, MS, Southern Hancock, MS, Southern Harrison, MS, Southern Jackson, MS
Expires 7:00 PM
70 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
31°
42%
11 AM
32°
69%
12 PM
33°
68%
1 PM
34°
67%
2 PM
34°
67%
3 PM
32°
77%
4 PM
33°
51%
5 PM
33°
50%
6 PM
32°
51%
7 PM
31°
54%
8 PM
31°
41%
9 PM
28°
32%
10 PM
28°
22%
11 PM
28°
22%
12 AM
27°
10%
1 AM
27°
14%
2 AM
27°
14%
3 AM
26°
14%
4 AM
26°
15%
5 AM
26°
9%
6 AM
26°
9%
7 AM
26°
15%
8 AM
27°
26%
9 AM
29°
26%
7-Day Forecast
Today
36° 26°
Mostly Cloudy with a 67% chance of rain.
Wed
34° 26°
Mostly Cloudy with a 72% chance of rain.
Thu
34° 25°
Partly Cloudy with a 69% chance of rain.
Fri
34° 23°
Partly Cloudy with a 79% chance of rain.
Sat
35° 23°
Rain, 69% chance.
Sun
35° 23°
Rain, 70% chance.
Mon
36° 23°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 31° Mostly Clear 42% 6 mph NNW 69%
11 AM 32° Mostly Clear 69% 7 mph NNW 66%
12 PM 33° Partly Cloudy 68% 8 mph NNW 66%
1 PM 34° Mostly Cloudy 67% 8 mph NNW 69%
2 PM 34° Partly Cloudy 67% 8 mph NW 71%
3 PM 32° Overcast 77% 6 mph NW 73%
4 PM 33° Mostly Cloudy 51% 6 mph NW 73%
5 PM 33° Mostly Cloudy 50% 7 mph NW 76%
6 PM 32° Rain 51% 7 mph NW 77%
7 PM 31° Mostly Cloudy 54% 6 mph NW 81%
8 PM 31° Partly Cloudy 41% 6 mph WNW 84%
9 PM 28° Partly Cloudy 32% 7 mph WNW 88%
10 PM 28° Partly Cloudy 22% 6 mph NW 88%
11 PM 28° Partly Cloudy 22% 6 mph NW 88%
12 AM 27° Partly Cloudy 10% 6 mph NNW 88%
1 AM 27° Partly Cloudy 14% 6 mph NNW 89%
2 AM 27° Partly Cloudy 14% 7 mph NW 90%
3 AM 26° Partly Cloudy 14% 7 mph NW 91%
4 AM 26° Partly Cloudy 15% 8 mph NNW 90%
5 AM 26° Partly Cloudy 9% 8 mph NNW 90%
6 AM 26° Mostly Cloudy 9% 9 mph NNW 89%
7 AM 26° Partly Cloudy 15% 10 mph NNW 85%
8 AM 27° Partly Cloudy 26% 10 mph N 80%
9 AM 29° Partly Cloudy 26% 12 mph N 75%
15-Day Forecast
Today
7/21
Mostly Cloudy
67%
26°
36°
Wed
7/22
Mostly Cloudy
72%
26°
34°
Thu
7/23
Partly Cloudy
69%
25°
34°
Fri
7/24
Partly Cloudy
79%
23°
34°
Sat
7/25
Rain
69%
23°
35°
Sun
7/26
Rain
70%
23°
35°
Mon
7/27
Clear
17%
23°
36°
Tue
7/28
Drizzle
42%
24°
37°
Wed
7/29
Thunderstorm
44%
24°
37°
Thu
7/30
Thunderstorm
51%
24°
36°
Fri
7/31
Drizzle
60%
24°
36°
Sat
8/1
Drizzle
60%
24°
36°
Sun
8/2
Drizzle
60%
24°
36°
Mon
8/3
Drizzle
60%
24°
35°
Tue
8/4
Rain
90%
24°
34°
70
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
70 AQI 19.6 µg/m³
O3
Ground-level ozone
32 AQI 36 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 70 Moderate 32 70
Thu 56 Moderate 31 56
Fri 46 Good 27 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, 14:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3393 J/kg
MLCAPE1390 J/kg
MUCAPE3393 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-5.5
Kinematics
0–6 km Shear22 kt
0–1 km Shear12 kt
Eff. Shear31 kt
0–1 km SRH-10
0–3 km SRH-41
Eff. SRH-41
Storm Motion350° @ 31 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.7
Thermo & Levels
PWAT2.23 in
0–3 km LR6.7 °C/km
700–500 LR4.9 °C/km
Total Totals43.0
LCL935 hPa
LFC1011 hPa
EL126 hPa
Freezing Lvl17,454 ft