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, Lower St. Bernard, LA, Northern Tangipahoa, LA, Central Plaquemines, LA, Lower Plaquemines, LA, Coastal Jefferson, LA, Upper Lafourche, LA, Lower Lafourche, LA, Upper Terrebonne, LA, Lower Terrebonne, LA, Wilkinson, MS, Amite, MS, Pike, MS, Walthall, MS, Pearl River, MS 8:00 PM

Saint Helena Parish, Louisiana, United States

Last updated: 2:49 PM CDT  ·  Refresh
34°C
Feels like 42°
Mostly Clear
▲ 36°  /  ▼ 23°
Wind
5 mph W
Humidity
59%
Dew Point
24°
Pressure
29.83 inHg
Visibility
10 mi
UV Index
9.0
Cloud Cover
22%
Sunrise
6:30 AM
Sunset
7:42 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Saint Helena Parish is currently mostly clear at 34°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2708 J/kg) — isolated convective development possible. Sunrise: 6:30AM · Sunset: 7:42PM.

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, Lower St. Bernard, LA, Northern Tangipahoa, LA, Central Plaquemines, LA, Lower Plaquemines, LA, Coastal Jefferson, LA, Upper Lafourche, LA, Lower Lafourche, LA, Upper Terrebonne, LA, Lower Terrebonne, LA, Wilkinson, MS, Amite, MS, Pike, MS, Walthall, MS, Pearl River, MS
Expires 8:00 PM
53 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
34°
23%
3 PM
33°
48%
4 PM
33°
31%
5 PM
32°
24%
6 PM
31°
17%
7 PM
29°
13%
8 PM
29°
13%
9 PM
29°
13%
10 PM
29°
8%
11 PM
28°
5%
12 AM
27°
3%
1 AM
26°
3%
2 AM
26°
3%
3 AM
25°
3%
4 AM
25°
3%
5 AM
23°
3%
6 AM
23°
3%
7 AM
24°
9%
8 AM
26°
20%
9 AM
29°
20%
10 AM
31°
21%
11 AM
31°
21%
12 PM
32°
21%
1 PM
34°
25%
7-Day Forecast
Today
36° 23°
Partly Cloudy with a 24% chance of rain.
Tue
38° 23°
Partly Cloudy with a 51% chance of rain.
Wed
38° 23°
Mostly Cloudy with a 26% chance of rain.
Thu
38° 24°
Mostly Cloudy with a 71% chance of rain.
Fri
39° 23°
Drizzle, 81% chance.
Sat
39° 21°
Clear.
Sun
39° 21°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 34° Mostly Clear 23% 5 mph W 59%
3 PM 33° Partly Cloudy 48% 6 mph WSW 65%
4 PM 33° Partly Cloudy 31% 6 mph SW 66%
5 PM 32° Partly Cloudy 24% 6 mph SW 66%
6 PM 31° Partly Cloudy 17% 6 mph SSW 68%
7 PM 29° Partly Cloudy 13% 5 mph SSW 70%
8 PM 29° Partly Cloudy 13% 6 mph SSW 71%
9 PM 29° Partly Cloudy 13% 6 mph SSW 74%
10 PM 29° Partly Cloudy 8% 6 mph SW 76%
11 PM 28° Partly Cloudy 5% 6 mph SW 78%
12 AM 27° Mostly Cloudy 3% 5 mph SW 79%
1 AM 26° Mostly Cloudy 3% 5 mph WSW 81%
2 AM 26° Mostly Cloudy 3% 5 mph WSW 82%
3 AM 25° Mostly Cloudy 3% 4 mph WSW 84%
4 AM 25° Mostly Cloudy 3% 5 mph W 86%
5 AM 23° Partly Cloudy 3% 5 mph W 88%
6 AM 23° Partly Cloudy 3% 5 mph W 90%
7 AM 24° Partly Cloudy 9% 6 mph W 82%
8 AM 26° Partly Cloudy 20% 6 mph W 74%
9 AM 29° Partly Cloudy 20% 7 mph W 68%
10 AM 31° Partly Cloudy 21% 7 mph W 63%
11 AM 31° Partly Cloudy 21% 7 mph W 58%
12 PM 32° Partly Cloudy 21% 6 mph W 53%
1 PM 34° Partly Cloudy 25% 6 mph W 52%
15-Day Forecast
Today
8/17
Partly Cloudy
24%
23°
36°
Tue
8/18
Partly Cloudy
51%
23°
38°
Wed
8/19
Mostly Cloudy
26%
23°
38°
Thu
8/20
Mostly Cloudy
71%
24°
38°
Fri
8/21
Drizzle
81%
23°
39°
Sat
8/22
Clear
19%
21°
39°
Sun
8/23
Clear
19%
21°
39°
Mon
8/24
Clear
60%
21°
40°
Tue
8/25
Drizzle
60%
23°
39°
Wed
8/26
Drizzle
60%
22°
39°
Thu
8/27
Drizzle
60%
23°
38°
Fri
8/28
Drizzle
60%
22°
39°
Sat
8/29
Clear
25%
22°
38°
Sun
8/30
Clear
60%
22°
38°
Mon
8/31
Drizzle
60%
22°
38°
53
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
53 AQI 10.2 µg/m³
O3
Ground-level ozone
30 AQI 33 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 53 Moderate 30 53
Wed 52 Moderate 33 52
Thu 49 Good 34 49
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, 18:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3802 J/kg
MLCAPE3133 J/kg
MUCAPE3802 J/kg
SBCIN-5 J/kg
MLCIN-16 J/kg
Lifted Index-7.2
Kinematics
0–6 km Shear5 kt
0–1 km Shear2 kt
Eff. Shear11 kt
0–1 km SRH-5
0–3 km SRH-9
Eff. SRH-9
Storm Motion268° @ 17 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index38.8
Thermo & Levels
PWAT2.21 in
0–3 km LR8.0 °C/km
700–500 LR5.0 °C/km
Total Totals47.6
LCL878 hPa
LFC857 hPa
EL124 hPa
Freezing Lvl16,319 ft