Extreme 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 Coastal Flood Advisory — St. John The Baptist, LA, Southwestern St. Tammany, LA, Lower Tangipahoa, LA, Coastal Jefferson, LA, Lower Lafourche, LA, Lower Terrebonne, LA, Upper St. Charles, LA 4:00 AM

St. John the Baptist Parish, Louisiana, United States

Last updated: 5:45 PM CDT  ·  Refresh
32°C
Feels like 41°
Partly Cloudy
▲ 33°  /  ▼ 25°
Wind
8 mph WNW
Humidity
74%
Dew Point
26°
Pressure
29.76 inHg
Visibility
10 mi
UV Index
5.5
Cloud Cover
34%
Sunrise
6:14 AM
Sunset
8:02 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: St. John the Baptist Parish is currently partly cloudy at 32°C. Precipitation is likely — peak probability 65% around 6 PM. Atmospheric instability is elevated (CAPE up to 3213 J/kg) — isolated convective development possible. Sunrise: 6:14AM · Sunset: 8:02PM.

63 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
32°
32%
6 PM
33°
65%
7 PM
32°
65%
8 PM
31°
56%
9 PM
29°
38%
10 PM
29°
37%
11 PM
29°
31%
12 AM
28°
21%
1 AM
28°
9%
2 AM
28°
9%
3 AM
27°
12%
4 AM
27°
13%
5 AM
25°
10%
6 AM
25°
8%
7 AM
26°
14%
8 AM
27°
14%
9 AM
28°
24%
10 AM
29°
31%
11 AM
30°
31%
12 PM
32°
37%
1 PM
32°
43%
2 PM
31°
47%
3 PM
31°
48%
4 PM
31°
52%
7-Day Forecast
Today
33° 25°
Partly Cloudy with a 56% chance of rain.
Wed
33° 25°
Partly Cloudy with a 57% chance of rain.
Thu
32° 26°
Partly Cloudy with a 75% chance of rain.
Fri
33° 25°
Partly Cloudy with a 47% chance of rain.
Sat
34° 24°
Drizzle, 59% chance.
Sun
34° 23°
Mostly Cloudy with a 20% chance of rain.
Mon
34° 24°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 32° Partly Cloudy 32% 8 mph WNW 74%
6 PM 33° Rain 65% 7 mph WNW 82%
7 PM 32° Heavy Rain 65% 7 mph WNW 83%
8 PM 31° Partly Cloudy 56% 8 mph NW 83%
9 PM 29° Partly Cloudy 38% 8 mph NW 83%
10 PM 29° Partly Cloudy 37% 8 mph NNW 84%
11 PM 29° Partly Cloudy 31% 7 mph N 84%
12 AM 28° Partly Cloudy 21% 7 mph N 85%
1 AM 28° Partly Cloudy 9% 7 mph N 85%
2 AM 28° Partly Cloudy 9% 8 mph N 83%
3 AM 27° Partly Cloudy 12% 8 mph NNW 83%
4 AM 27° Partly Cloudy 13% 9 mph NNW 83%
5 AM 25° Partly Cloudy 10% 10 mph NNW 84%
6 AM 25° Partly Cloudy 8% 11 mph NNW 84%
7 AM 26° Partly Cloudy 14% 12 mph N 83%
8 AM 27° Partly Cloudy 14% 13 mph N 80%
9 AM 28° Partly Cloudy 24% 14 mph N 78%
10 AM 29° Partly Cloudy 31% 14 mph N 75%
11 AM 30° Partly Cloudy 31% 15 mph N 72%
12 PM 32° Partly Cloudy 37% 16 mph NNE 70%
1 PM 32° Partly Cloudy 43% 16 mph NNE 71%
2 PM 31° Partly Cloudy 47% 16 mph NNE 73%
3 PM 31° Mostly Cloudy 48% 16 mph NNE 75%
4 PM 31° Mostly Cloudy 52% 17 mph NNE 78%
15-Day Forecast
Today
7/21
Partly Cloudy
56%
25°
33°
Wed
7/22
Partly Cloudy
57%
25°
33°
Thu
7/23
Partly Cloudy
75%
26°
32°
Fri
7/24
Partly Cloudy
47%
25°
33°
Sat
7/25
Drizzle
59%
24°
34°
Sun
7/26
Mostly Cloudy
20%
23°
34°
Mon
7/27
Clear
17%
24°
34°
Tue
7/28
Mostly Clear
8%
24°
36°
Wed
7/29
Thunderstorm
60%
24°
36°
Thu
7/30
Rain
82%
24°
34°
Fri
7/31
Drizzle
60%
24°
34°
Sat
8/1
Drizzle
60%
24°
34°
Sun
8/2
Rain
90%
24°
34°
Mon
8/3
Drizzle
60%
24°
34°
Tue
8/4
Drizzle
60%
24°
34°
63
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
63 AQI 15.8 µg/m³
O3
Ground-level ozone
26 AQI 29 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 63 Moderate 26 63
Thu 47 Good 31 47
Fri 48 Good 31 48
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 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE4167 J/kg
MLCAPE3420 J/kg
MUCAPE4167 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-6.1
Kinematics
0–6 km Shear24 kt
0–1 km Shear13 kt
Eff. Shear37 kt
0–1 km SRH18
0–3 km SRH-32
Eff. SRH-32
Storm Motion355° @ 32 kt
0–1 km EHI0.5
Composite Parameters
Sig. Tornado0.3
STP (eff)0.0
Supercell0.0
K-Index38.1
Thermo & Levels
PWAT2.44 in
0–3 km LR6.8 °C/km
700–500 LR4.8 °C/km
Total Totals45.0
LCL932 hPa
LFC1008 hPa
EL119 hPa
Freezing Lvl17,904 ft