Excessive Heat Watch 8:00 PM 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, Northern Hancock, MS, Northern Harrison, MS, Northern Jackson, MS, Southern Hancock, MS, Southern Harrison, MS, Southern Jackson, MS 8:00 PM

St. John the Baptist Parish, Louisiana, United States

Last updated: 11:00 PM CDT  ·  Refresh
28°C
Feels like 32°
Mostly Clear
▲ 36°  /  ▼ 25°
Wind
3 mph SSW
Humidity
78%
Dew Point
24°
Pressure
30.07 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
17%
Sunrise
6:30 AM
Sunset
7:42 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: St. John the Baptist Parish is currently mostly clear at 28°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2454 J/kg) — isolated convective development possible. Sunrise: 6:30AM · Sunset: 7:42PM.

54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
28°
16%
12 AM
29°
27%
1 AM
28°
12%
2 AM
28°
12%
3 AM
27°
12%
4 AM
27°
4%
5 AM
27°
4%
6 AM
25°
3%
7 AM
25°
3%
8 AM
27°
17%
9 AM
29°
21%
10 AM
31°
30%
11 AM
32°
34%
12 PM
33°
42%
1 PM
34°
42%
2 PM
36°
43%
3 PM
36°
36%
4 PM
36°
36%
5 PM
34°
37%
6 PM
34°
37%
7 PM
33°
22%
8 PM
32°
22%
9 PM
32°
19%
10 PM
29°
10%
7-Day Forecast
Tonight
36° 25°
Mostly Clear.
Mon
36° 25°
Partly Cloudy with a 43% chance of rain.
Tue
38° 26°
Partly Cloudy with a 35% chance of rain.
Wed
37° 26°
Mostly Clear with a 57% chance of rain.
Thu
39° 24°
Overcast with a 30% chance of rain.
Fri
38° 24°
Rain, 64% chance.
Sat
38° 24°
Rain, 64% chance.
TimeTempConditionsPrecipWindHumidity
Now 28° Mostly Clear 16% 3 mph SSW 78%
12 AM 29° Mostly Clear 27% 5 mph SW 82%
1 AM 28° Clear 12% 6 mph SW 85%
2 AM 28° Clear 12% 6 mph SW 86%
3 AM 27° Clear 12% 6 mph WSW 87%
4 AM 27° Clear 4% 6 mph WSW 87%
5 AM 27° Clear 4% 5 mph WSW 88%
6 AM 25° Clear 3% 5 mph W 88%
7 AM 25° Clear 3% 5 mph WNW 89%
8 AM 27° Clear 17% 6 mph WNW 81%
9 AM 29° Clear 21% 6 mph WNW 74%
10 AM 31° Partly Cloudy 30% 6 mph WNW 66%
11 AM 32° Partly Cloudy 34% 5 mph WNW 62%
12 PM 33° Mostly Clear 42% 4 mph W 57%
1 PM 34° Mostly Clear 42% 4 mph WSW 52%
2 PM 36° Partly Cloudy 43% 4 mph SW 52%
3 PM 36° Partly Cloudy 36% 4 mph SW 52%
4 PM 36° Partly Cloudy 36% 5 mph SSW 53%
5 PM 34° Partly Cloudy 37% 5 mph SSW 59%
6 PM 34° Partly Cloudy 37% 5 mph SW 67%
7 PM 33° Partly Cloudy 22% 6 mph WSW 72%
8 PM 32° Partly Cloudy 22% 6 mph SW 73%
9 PM 32° Partly Cloudy 19% 6 mph SW 75%
10 PM 29° Partly Cloudy 10% 9 mph SW 76%
15-Day Forecast
Today
8/16
Mostly Clear
16%
25°
36°
Mon
8/17
Partly Cloudy
43%
25°
36°
Tue
8/18
Partly Cloudy
35%
26°
38°
Wed
8/19
Mostly Clear
57%
26°
37°
Thu
8/20
Overcast
30%
24°
39°
Fri
8/21
Rain
64%
24°
38°
Sat
8/22
Rain
64%
24°
38°
Sun
8/23
Clear
17%
23°
38°
Mon
8/24
Thunderstorm
44%
24°
38°
Tue
8/25
Rain
68%
24°
38°
Wed
8/26
Drizzle
60%
24°
38°
Thu
8/27
Drizzle
60%
24°
39°
Fri
8/28
Drizzle
60%
24°
39°
Sat
8/29
Drizzle
60%
24°
38°
Sun
8/30
Drizzle
60%
24°
37°
54
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
54 AQI 10.5 µg/m³
O3
Ground-level ozone
33 AQI 36 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 54 Moderate 33 54
Tue 55 Moderate 39 55
Wed 52 Moderate 34 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 Mon Aug 17, 02:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1657 J/kg
MLCAPE1233 J/kg
MUCAPE1657 J/kg
SBCIN-157 J/kg
MLCIN-97 J/kg
Lifted Index-4.0
Kinematics
0–6 km Shear8 kt
0–1 km Shear7 kt
Eff. Shear4 kt
0–1 km SRH24
0–3 km SRH67
Eff. SRH67
Storm Motion101° @ 18 kt
0–1 km EHI0.3
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index28.6
Thermo & Levels
PWAT1.99 in
0–3 km LR5.3 °C/km
700–500 LR5.8 °C/km
Total Totals44.6
LCL962 hPa
LFC797 hPa
EL151 hPa
Freezing Lvl16,804 ft