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, 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, Southern Hancock, MS 7:00 PM

Saint Helena Parish, Louisiana, United States

Last updated: 9:47 AM CDT  ·  Refresh
29°C
Feels like 34°
Mostly Clear
▲ 36°  /  ▼ 23°
Wind
3 mph NW
Humidity
71%
Dew Point
24°
Pressure
29.73 inHg
Visibility
10 mi
UV Index
7.1
Cloud Cover
12%
Sunrise
6:42 AM
Sunset
7:18 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Saint Helena Parish is currently mostly clear at 29°C. Precipitation is likely — peak probability 62% around 4 PM. Atmospheric instability is elevated (CAPE up to 2703 J/kg) — isolated convective development possible. Sunrise: 6:42AM · Sunset: 7:18PM.

Alerts

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, 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, Southern Hancock, MS
Expires 7:00 PM
45 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
29°
17%
10 AM
32°
31%
11 AM
33°
43%
12 PM
34°
41%
1 PM
36°
41%
2 PM
36°
42%
3 PM
36°
43%
4 PM
34°
62%
5 PM
32°
54%
6 PM
31°
54%
7 PM
29°
43%
8 PM
28°
29%
9 PM
26°
34%
10 PM
26°
34%
11 PM
26°
30%
12 AM
25°
28%
1 AM
25°
28%
2 AM
24°
32%
3 AM
24°
27%
4 AM
24°
18%
5 AM
23°
27%
6 AM
23°
27%
7 AM
24°
44%
8 AM
25°
31%
7-Day Forecast
Today
36° 23°
Rain, 54% chance.
Tue
37° 23°
Partly Cloudy with a 47% chance of rain.
Wed
34° 21°
Partly Cloudy with a 69% chance of rain.
Thu
33° 22°
Overcast with a 83% chance of rain.
Fri
34° 21°
Rain, 72% chance.
Sat
34° 22°
Rain, 82% chance.
Sun
35° 22°
Drizzle, 53% chance.
TimeTempConditionsPrecipWindHumidity
Now 29° Mostly Clear 17% 3 mph NW 71%
10 AM 32° Clear 31% 3 mph NW 63%
11 AM 33° Mostly Clear 43% 4 mph NNW 57%
12 PM 34° Mostly Clear 41% 3 mph NNW 53%
1 PM 36° Mostly Clear 41% 3 mph NNW 51%
2 PM 36° Mostly Cloudy 42% 3 mph NE 53%
3 PM 36° Mostly Cloudy 43% 2 mph NE 53%
4 PM 34° Mostly Cloudy 62% 3 mph SSE 57%
5 PM 32° Rain 54% 4 mph SSE 63%
6 PM 31° Rain 54% 2 mph SSW 70%
7 PM 29° Partly Cloudy 43% 3 mph WSW 77%
8 PM 28° Partly Cloudy 29% 3 mph SSW 83%
9 PM 26° Partly Cloudy 34% 2 mph SW 90%
10 PM 26° Partly Cloudy 34% 2 mph S 92%
11 PM 26° Mostly Clear 30% 2 mph SSE 93%
12 AM 25° Mostly Clear 28% 3 mph ESE 94%
1 AM 25° Mostly Clear 28% 3 mph ESE 94%
2 AM 24° Mostly Clear 32% 2 mph ESE 95%
3 AM 24° Haze 27% 3 mph ESE 96%
4 AM 24° Fog 18% 3 mph ESE 96%
5 AM 23° Fog 27% 3 mph ESE 96%
6 AM 23° Fog 27% 3 mph E 96%
7 AM 24° Partly Cloudy 44% 3 mph ESE 91%
8 AM 25° Partly Cloudy 31% 3 mph ESE 86%
15-Day Forecast
Today
9/7
Rain
54%
23°
36°
Tue
9/8
Partly Cloudy
47%
23°
37°
Wed
9/9
Partly Cloudy
69%
21°
34°
Thu
9/10
Overcast
83%
22°
33°
Fri
9/11
Rain
72%
21°
34°
Sat
9/12
Rain
82%
22°
34°
Sun
9/13
Drizzle
53%
22°
35°
Mon
9/14
Drizzle
43%
21°
35°
Tue
9/15
Drizzle
44%
21°
36°
Wed
9/16
Drizzle
51%
21°
35°
Thu
9/17
Drizzle
60%
21°
34°
Fri
9/18
Drizzle
60%
21°
34°
Sat
9/19
Drizzle
60%
21°
33°
Sun
9/20
Drizzle
60%
21°
33°
Mon
9/21
Drizzle
60%
20°
33°
45
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
45 AQI 8.1 µg/m³
O3
Ground-level ozone
31 AQI 34 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 45 Good 31 45
Wed 34 Good 31 34
Thu 30 Good 30 18
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 Sep 7, 13:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2622 J/kg
MLCAPE1578 J/kg
MUCAPE2622 J/kg
SBCIN-62 J/kg
MLCIN-78 J/kg
Lifted Index-6.2
Kinematics
0–6 km Shear11 kt
0–1 km Shear7 kt
Eff. Shear23 kt
0–1 km SRH26
0–3 km SRH16
Eff. SRH16
Storm Motion97° @ 14 kt
0–1 km EHI0.4
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.5
K-Index34.2
Thermo & Levels
PWAT2.12 in
0–3 km LR6.2 °C/km
700–500 LR5.9 °C/km
Total Totals48.9
LCL933 hPa
LFC850 hPa
EL147 hPa
Freezing Lvl15,702 ft