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 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 8:00 PM

St. John the Baptist Parish, Louisiana, United States

Last updated: 3:01 PM CDT  ·  Refresh
36°C
Feels like 43°
Partly Cloudy
▲ 36°  /  ▼ 24°
Wind
6 mph SW
Humidity
53%
Dew Point
24°
Pressure
29.98 inHg
Visibility
10 mi
UV Index
8.5
Cloud Cover
37%
Sunrise
6:32 AM
Sunset
7:37 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: St. John the Baptist Parish is currently partly cloudy at 35°C. Precipitation is likely — peak probability 80% around 8 PM. Atmospheric instability is elevated (CAPE up to 2847 J/kg) — isolated convective development possible. Sunrise: 6:32AM · Sunset: 7:37PM.

Alerts

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
Expires 8:00 PM
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 8:00 PM
55 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
36°
31%
4 PM
36°
54%
5 PM
34°
62%
6 PM
33°
61%
7 PM
31°
75%
8 PM
29°
79%
9 PM
28°
60%
10 PM
28°
43%
11 PM
27°
29%
12 AM
27°
34%
1 AM
27°
21%
2 AM
27°
8%
3 AM
26°
8%
4 AM
26°
8%
5 AM
26°
8%
6 AM
24°
8%
7 AM
24°
5%
8 AM
26°
5%
9 AM
27°
14%
10 AM
29°
14%
11 AM
30°
14%
12 PM
31°
11%
1 PM
32°
11%
2 PM
35°
12%
7-Day Forecast
Today
36° 24°
Partly Cloudy with a 61% chance of rain.
Sat
37° 24°
Partly Cloudy with a 34% chance of rain.
Sun
38° 26°
Partly Cloudy with a 31% chance of rain.
Mon
37° 26°
Partly Cloudy with a 62% chance of rain.
Tue
36° 25°
Drizzle, 51% chance.
Wed
36° 24°
Rain, 70% chance.
Thu
36° 25°
Drizzle, 53% chance.
TimeTempConditionsPrecipWindHumidity
Now 36° Partly Cloudy 31% 6 mph SW 53%
4 PM 36° Partly Cloudy 54% 7 mph SSW 51%
5 PM 34° Partly Cloudy 62% 6 mph SW 61%
6 PM 33° Partly Cloudy 61% 6 mph SSW 71%
7 PM 31° Overcast 75% 6 mph SW 81%
8 PM 29° Mostly Cloudy 79% 6 mph WSW 82%
9 PM 28° Rain 60% 9 mph E 82%
10 PM 28° Rain 43% 6 mph SSW 82%
11 PM 27° Mostly Cloudy 29% 6 mph SW 84%
12 AM 27° Rain 34% 5 mph WSW 85%
1 AM 27° Mostly Cloudy 21% 6 mph WSW 87%
2 AM 27° Overcast 8% 6 mph W 87%
3 AM 26° Overcast 8% 6 mph W 87%
4 AM 26° Overcast 8% 5 mph W 87%
5 AM 26° Overcast 8% 6 mph W 87%
6 AM 24° Overcast 8% 6 mph W 87%
7 AM 24° Overcast 5% 6 mph W 87%
8 AM 26° Mostly Cloudy 5% 6 mph W 82%
9 AM 27° Mostly Cloudy 14% 6 mph W 76%
10 AM 29° Mostly Cloudy 14% 6 mph W 71%
11 AM 30° Mostly Cloudy 14% 6 mph WNW 68%
12 PM 31° Mostly Cloudy 11% 5 mph WNW 64%
1 PM 32° Mostly Cloudy 11% 4 mph WNW 60%
2 PM 35° Partly Cloudy 12% 4 mph WNW 60%
15-Day Forecast
Today
8/21
Partly Cloudy
61%
24°
36°
Sat
8/22
Partly Cloudy
34%
24°
37°
Sun
8/23
Partly Cloudy
31%
26°
38°
Mon
8/24
Partly Cloudy
62%
26°
37°
Tue
8/25
Drizzle
51%
25°
36°
Wed
8/26
Rain
70%
24°
36°
Thu
8/27
Drizzle
53%
25°
36°
Fri
8/28
Drizzle
53%
24°
36°
Sat
8/29
Drizzle
44%
24°
36°
Sun
8/30
Drizzle
44%
24°
37°
Mon
8/31
Drizzle
60%
24°
37°
Tue
9/1
Drizzle
60%
24°
37°
Wed
9/2
Drizzle
60%
24°
37°
Thu
9/3
Drizzle
60%
24°
37°
Fri
9/4
Drizzle
60%
24°
37°
55
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
55 AQI 11.2 µg/m³
O3
Ground-level ozone
41 AQI 45 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 55 Moderate 41 55
Sun 53 Moderate 41 53
Mon 55 Moderate 42 55
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 Fri Aug 21, 17:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE4037 J/kg
MLCAPE3366 J/kg
MUCAPE4037 J/kg
SBCIN-3 J/kg
MLCIN-25 J/kg
Lifted Index-8.7
Kinematics
0–6 km Shear15 kt
0–1 km Shear3 kt
Eff. Shear13 kt
0–1 km SRH18
0–3 km SRH42
Eff. SRH42
Storm Motion67° @ 16 kt
0–1 km EHI0.5
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index33.6
Thermo & Levels
PWAT2.08 in
0–3 km LR8.0 °C/km
700–500 LR6.4 °C/km
Total Totals50.1
LCL859 hPa
LFC842 hPa
EL140 hPa
Freezing Lvl15,223 ft