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 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: 10:59 AM CDT  ·  Refresh
31°C
Feels like 37°
Mostly Clear
▲ 36°  /  ▼ 26°
Wind
5 mph N
Humidity
66%
Dew Point
25°
Pressure
29.86 inHg
Visibility
10 mi
UV Index
9.0
Cloud Cover
20%
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 mostly clear at 31°C. Precipitation is likely — peak probability 62% around 2 PM. Atmospheric instability is elevated (CAPE up to 2929 J/kg) — isolated convective development possible. Sunrise: 6:14AM · Sunset: 8:02PM.

65 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
31°
28%
11 AM
33°
50%
12 PM
33°
46%
1 PM
35°
51%
2 PM
34°
61%
3 PM
34°
56%
4 PM
34°
53%
5 PM
33°
52%
6 PM
32°
52%
7 PM
31°
56%
8 PM
31°
48%
9 PM
29°
48%
10 PM
29°
30%
11 PM
28°
22%
12 AM
28°
10%
1 AM
28°
10%
2 AM
27°
14%
3 AM
27°
14%
4 AM
27°
9%
5 AM
26°
9%
6 AM
26°
9%
7 AM
27°
15%
8 AM
27°
16%
9 AM
29°
16%
7-Day Forecast
Today
36° 26°
Partly Cloudy with a 56% chance of rain.
Wed
34° 26°
Rain, 72% chance.
Thu
34° 26°
Mostly Clear with a 59% chance of rain.
Fri
34° 24°
Mostly Clear with a 73% chance of rain.
Sat
35° 24°
Rain, 69% chance.
Sun
35° 24°
Rain, 70% chance.
Mon
36° 24°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 31° Mostly Clear 28% 5 mph N 66%
11 AM 33° Mostly Clear 50% 6 mph N 62%
12 PM 33° Mostly Clear 46% 7 mph NNW 62%
1 PM 35° Partly Cloudy 51% 8 mph NNW 64%
2 PM 34° Mostly Cloudy 61% 9 mph NNW 66%
3 PM 34° Mostly Clear 56% 9 mph NNW 66%
4 PM 34° Rain 53% 7 mph NNW 68%
5 PM 33° Rain 52% 9 mph NNW 72%
6 PM 32° Partly Cloudy 52% 8 mph NW 76%
7 PM 31° Partly Cloudy 56% 6 mph NNW 78%
8 PM 31° Partly Cloudy 48% 8 mph NNW 79%
9 PM 29° Partly Cloudy 48% 8 mph NNW 79%
10 PM 29° Partly Cloudy 30% 8 mph N 81%
11 PM 28° Partly Cloudy 22% 8 mph N 83%
12 AM 28° Partly Cloudy 10% 8 mph N 86%
1 AM 28° Partly Cloudy 10% 8 mph N 86%
2 AM 27° Partly Cloudy 14% 9 mph N 85%
3 AM 27° Partly Cloudy 14% 9 mph N 85%
4 AM 27° Partly Cloudy 9% 10 mph N 85%
5 AM 26° Partly Cloudy 9% 11 mph N 85%
6 AM 26° Partly Cloudy 9% 12 mph N 85%
7 AM 27° Partly Cloudy 15% 12 mph N 83%
8 AM 27° Partly Cloudy 16% 13 mph N 80%
9 AM 29° Partly Cloudy 16% 15 mph NNE 77%
15-Day Forecast
Today
7/21
Partly Cloudy
56%
26°
36°
Wed
7/22
Rain
72%
26°
34°
Thu
7/23
Mostly Clear
59%
26°
34°
Fri
7/24
Mostly Clear
73%
24°
34°
Sat
7/25
Rain
69%
24°
35°
Sun
7/26
Rain
70%
24°
35°
Mon
7/27
Clear
17%
24°
36°
Tue
7/28
Drizzle
42%
24°
37°
Wed
7/29
Thunderstorm
44%
25°
37°
Thu
7/30
Thunderstorm
51%
25°
36°
Fri
7/31
Drizzle
60%
25°
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°
65
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
65 AQI 16.5 µg/m³
O3
Ground-level ozone
28 AQI 31 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 65 Moderate 28 65
Thu 46 Good 30 46
Fri 48 Good 28 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, 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
SBCAPE2532 J/kg
MLCAPE731 J/kg
MUCAPE2532 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-4.3
Kinematics
0–6 km Shear21 kt
0–1 km Shear13 kt
Eff. Shear28 kt
0–1 km SRH-4
0–3 km SRH-34
Eff. SRH-34
Storm Motion349° @ 31 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.5
Thermo & Levels
PWAT2.16 in
0–3 km LR6.7 °C/km
700–500 LR4.9 °C/km
Total Totals43.0
LCL919 hPa
LFC1011 hPa
EL140 hPa
Freezing Lvl17,520 ft