Extreme Heat Warning — St. James, LA, St. John The Baptist, LA, Upper St. Bernard, 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 Jefferson, LA, Upper St. Charles, LA, Central St. Charles, LA, Lower St. Charles, LA, Northern Hancock, MS, Northern Harrison, MS, Northern Jackson, MS, Southern Hancock, MS, Southern Harrison, MS, Southern Jackson, MS 8:00 PM Extreme Heat Warning — St. James, LA, St. John The Baptist, LA, Upper St. Bernard, 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 Jefferson, LA, Upper St. Charles, LA, Central St. Charles, LA, Lower St. Charles, LA, 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: 5:24 PM CDT  ·  Refresh
33°C
Feels like 42°
Partly Cloudy
▲ 37°  /  ▼ 25°
Wind
6 mph SSW
Humidity
65%
Dew Point
24°
Pressure
30.02 inHg
Visibility
10 mi
UV Index
5.5
Cloud Cover
43%
Sunrise
6:30 AM
Sunset
7:41 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: St. John the Baptist Parish is currently partly cloudy at 33°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2914 J/kg) — isolated convective development possible. Sunrise: 6:30AM · Sunset: 7:41PM.

Alerts

Extreme Heat Warning
St. James, LA, St. John The Baptist, LA, Upper St. Bernard, 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 Jefferson, LA, Upper St. Charles, LA, Central St. Charles, LA, Lower St. Charles, LA, Northern Hancock, MS, Northern Harrison, MS, Northern Jackson, MS, Southern Hancock, MS, Southern Harrison, MS, Southern Jackson, MS
Expires 8:00 PM
Extreme Heat Warning
St. James, LA, St. John The Baptist, LA, Upper St. Bernard, 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 Jefferson, LA, Upper St. Charles, LA, Central St. Charles, LA, Lower St. Charles, LA, Northern Hancock, MS, Northern Harrison, MS, Northern Jackson, MS, Southern Hancock, MS, Southern Harrison, MS, Southern Jackson, MS
Expires 8:00 PM
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
33°
17%
6 PM
33°
30%
7 PM
31°
30%
8 PM
31°
30%
9 PM
30°
24%
10 PM
29°
24%
11 PM
29°
24%
12 AM
28°
19%
1 AM
27°
3%
2 AM
27°
3%
3 AM
27°
5%
4 AM
27°
5%
5 AM
25°
8%
6 AM
25°
8%
7 AM
26°
14%
8 AM
27°
14%
9 AM
28°
24%
10 AM
29°
24%
11 AM
29°
25%
12 PM
32°
25%
1 PM
33°
28%
2 PM
34°
28%
3 PM
34°
32%
4 PM
34°
32%
7-Day Forecast
Today
37° 25°
Partly Cloudy with a 30% chance of rain.
Tue
36° 25°
Partly Cloudy with a 31% chance of rain.
Wed
36° 26°
Partly Cloudy with a 22% chance of rain.
Thu
36° 25°
Partly Cloudy with a 52% chance of rain.
Fri
38° 24°
Drizzle, 60% chance.
Sat
37° 24°
Drizzle, 60% chance.
Sun
37° 24°
Clear with a 33% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 33° Partly Cloudy 17% 6 mph SSW 65%
6 PM 33° Mostly Cloudy 30% 9 mph WNW 75%
7 PM 31° Mostly Cloudy 30% 8 mph NW 81%
8 PM 31° Partly Cloudy 30% 7 mph W 82%
9 PM 30° Mostly Clear 24% 7 mph SW 81%
10 PM 29° Partly Cloudy 24% 8 mph SW 81%
11 PM 29° Partly Cloudy 24% 8 mph SW 83%
12 AM 28° Partly Cloudy 19% 7 mph SW 85%
1 AM 27° Partly Cloudy 3% 6 mph SW 86%
2 AM 27° Partly Cloudy 3% 6 mph WSW 87%
3 AM 27° Partly Cloudy 5% 6 mph WSW 87%
4 AM 27° Mostly Cloudy 5% 6 mph WSW 87%
5 AM 25° Mostly Cloudy 8% 6 mph W 87%
6 AM 25° Mostly Cloudy 8% 5 mph W 88%
7 AM 26° Mostly Cloudy 14% 6 mph W 87%
8 AM 27° Mostly Cloudy 14% 7 mph WNW 84%
9 AM 28° Mostly Cloudy 24% 7 mph WNW 81%
10 AM 29° Mostly Cloudy 24% 7 mph WNW 77%
11 AM 29° Mostly Cloudy 25% 6 mph W 74%
12 PM 32° Mostly Cloudy 25% 6 mph W 71%
1 PM 33° Overcast 28% 6 mph W 68%
2 PM 34° Mostly Cloudy 28% 6 mph W 66%
3 PM 34° Mostly Cloudy 32% 6 mph W 64%
4 PM 34° Partly Cloudy 32% 6 mph WSW 63%
15-Day Forecast
Today
8/17
Partly Cloudy
30%
25°
37°
Tue
8/18
Partly Cloudy
31%
25°
36°
Wed
8/19
Partly Cloudy
22%
26°
36°
Thu
8/20
Partly Cloudy
52%
25°
36°
Fri
8/21
Drizzle
60%
24°
38°
Sat
8/22
Drizzle
60%
24°
37°
Sun
8/23
Clear
33%
24°
37°
Mon
8/24
Drizzle
56%
24°
38°
Tue
8/25
Drizzle
60%
24°
37°
Wed
8/26
Drizzle
67%
24°
38°
Thu
8/27
Drizzle
60%
24°
37°
Fri
8/28
Drizzle
60%
24°
38°
Sat
8/29
Drizzle
60%
24°
37°
Sun
8/30
Drizzle
60%
24°
37°
Mon
8/31
Drizzle
60%
23°
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 11.0 µg/m³
O3
Ground-level ozone
39 AQI 42 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 54 Moderate 39 54
Wed 53 Moderate 39 53
Thu 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 Mon Aug 17, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3369 J/kg
MLCAPE2324 J/kg
MUCAPE3369 J/kg
SBCIN-44 J/kg
MLCIN-41 J/kg
Lifted Index-7.2
Kinematics
0–6 km Shear3 kt
0–1 km Shear2 kt
Eff. Shear12 kt
0–1 km SRH10
0–3 km SRH29
Eff. SRH29
Storm Motion65° @ 15 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index32.7
Thermo & Levels
PWAT2.09 in
0–3 km LR7.3 °C/km
700–500 LR5.7 °C/km
Total Totals48.0
LCL896 hPa
LFC841 hPa
EL128 hPa
Freezing Lvl16,637 ft