Dense Fog 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, Pearl River, MS, Northern Hancock, MS, Northern Harrison, MS, Northern Jackson, MS, Southern Hancock, MS, Southern Harrison, MS, Southern Jackson, MS 10:00 AM

St. John the Baptist Parish, Louisiana, United States

Last updated: 9:47 PM CDT  ·  Refresh
23°C
Feels like 25°
Clear
▲ 32°  /  ▼ 17°
Wind
5 mph S
Humidity
78%
Dew Point
20°
Pressure
30.06 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
4%
Sunrise
7:02 AM
Sunset
6:33 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: St. John the Baptist Parish is currently clear at 23°C. Dry conditions are expected through the next 24 hours. Sunrise: 7:02AM · Sunset: 6:33PM.

Alerts

Dense Fog 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, Pearl River, MS, Northern Hancock, MS, Northern Harrison, MS, Northern Jackson, MS, Southern Hancock, MS, Southern Harrison, MS, Southern Jackson, MS
Expires 10:00 AM
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
3%
10 PM
23°
7%
11 PM
22°
9%
12 AM
21°
4%
1 AM
21°
5%
2 AM
21°
13%
3 AM
20°
15%
4 AM
20°
15%
5 AM
18°
6%
6 AM
17°
6%
7 AM
18°
6%
8 AM
20°
15%
9 AM
23°
15%
10 AM
25°
15%
11 AM
26°
3%
12 PM
27°
3%
1 PM
30°
3%
2 PM
31°
3%
3 PM
31°
3%
4 PM
31°
3%
5 PM
28°
7%
6 PM
27°
6%
7 PM
27°
6%
8 PM
25°
17%
7-Day Forecast
Tonight
32° 17°
Clear.
Wed
31° 17°
Fog.
Thu
32° 18°
Fog.
Fri
32° 17°
Fog.
Sat
26° 14°
Clear.
Sun
28° 13°
Drizzle, 51% chance.
Mon
29° 19°
Rain, 28% chance.
TimeTempConditionsPrecipWindHumidity
Now 23° Clear 3% 5 mph S 78%
10 PM 23° Clear 7% 6 mph S 82%
11 PM 22° Clear 9% 6 mph S 84%
12 AM 21° Clear 4% 5 mph S 87%
1 AM 21° Mostly Clear 5% 4 mph S 88%
2 AM 21° Mostly Clear 13% 3 mph S 90%
3 AM 20° Partly Cloudy 15% 2 mph S 91%
4 AM 20° Haze 15% 2 mph S 92%
5 AM 18° Fog 6% 1 mph SSE 92%
6 AM 17° Fog 6% 2 mph ESE 93%
7 AM 18° Fog 6% 2 mph E 91%
8 AM 20° Partly Cloudy 15% 2 mph E 86%
9 AM 23° Fog 15% 2 mph ENE 80%
10 AM 25° Haze 15% 3 mph ENE 74%
11 AM 26° Haze 3% 3 mph E 70%
12 PM 27° Partly Cloudy 3% 4 mph E 66%
1 PM 30° Mostly Clear 3% 4 mph E 64%
2 PM 31° Mostly Clear 3% 4 mph E 62%
3 PM 31° Clear 3% 4 mph E 61%
4 PM 31° Clear 3% 4 mph E 64%
5 PM 28° Clear 7% 4 mph ESE 69%
6 PM 27° Clear 6% 5 mph ESE 73%
7 PM 27° Clear 6% 5 mph ESE 76%
8 PM 25° Clear 17% 5 mph ESE 79%
15-Day Forecast
Today
10/13
Clear
3%
17°
32°
Wed
10/14
Fog
17%
17°
31°
Thu
10/15
Fog
18%
18°
32°
Fri
10/16
Fog
18%
17°
32°
Sat
10/17
Clear
3%
14°
26°
Sun
10/18
Drizzle
51%
13°
28°
Mon
10/19
Rain
28%
19°
29°
Tue
10/20
Drizzle
53%
20°
30°
Wed
10/21
Drizzle
43%
18°
31°
Thu
10/22
Drizzle
44%
18°
32°
Fri
10/23
Drizzle
51%
17°
32°
Sat
10/24
Drizzle
60%
19°
32°
Sun
10/25
Clear
25%
17°
31°
Mon
10/26
Drizzle
60%
17°
30°
Tue
10/27
Drizzle
60%
16°
29°
52
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
52 AQI 9.5 µg/m³
O3
Ground-level ozone
45 AQI 49 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 52 Moderate 45 52
Thu 67 Moderate 67 57
Fri 54 Moderate 50 54
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 Oct 13, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE14 J/kg
MUCAPE0 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index2.4
Kinematics
0–6 km Shear21 kt
0–1 km Shear2 kt
Eff. Shear—
0–1 km SRH5
0–3 km SRH16
Eff. SRH—
Storm Motion87° @ 18 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index-13.8
Thermo & Levels
PWAT0.87 in
0–3 km LR3.6 °C/km
700–500 LR6.5 °C/km
Total Totals19.8
LCL968 hPa
LFC1018 hPa
EL1018 hPa
Freezing Lvl17,110 ft