Severe Thunderstorm Watch 8:00 PM 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

Saint Helena Parish, Louisiana, United States

Last updated: 2:59 PM CDT  ·  Refresh
34°C
Feels like 40°
Mostly Cloudy
▲ 36°  /  ▼ 22°
Wind
6 mph W
Humidity
53%
Dew Point
22°
Pressure
29.76 inHg
Visibility
10 mi
UV Index
6.5
Cloud Cover
70%
Sunrise
6:32 AM
Sunset
7:38 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Saint Helena Parish is currently mostly cloudy at 34°C. Precipitation is likely — peak probability 76% around 7 PM. Atmospheric instability is elevated (CAPE up to 2408 J/kg) — isolated convective development possible. Sunrise: 6:32AM · Sunset: 7:38PM.

Alerts

Severe Thunderstorm Watch
Expires 8:00 PM
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
47 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
34°
43%
3 PM
32°
62%
4 PM
32°
62%
5 PM
31°
62%
6 PM
28°
71%
7 PM
26°
75%
8 PM
26°
69%
9 PM
27°
45%
10 PM
26°
24%
11 PM
26°
24%
12 AM
25°
12%
1 AM
25°
9%
2 AM
25°
9%
3 AM
24°
9%
4 AM
24°
9%
5 AM
22°
3%
6 AM
22°
3%
7 AM
24°
3%
8 AM
26°
3%
9 AM
29°
3%
10 AM
31°
3%
11 AM
32°
3%
12 PM
33°
3%
1 PM
34°
3%
7-Day Forecast
Today
36° 22°
Mostly Cloudy with a 69% chance of rain.
Sat
39° 22°
Partly Cloudy.
Sun
39° 24°
Partly Cloudy with a 52% chance of rain.
Mon
36° 23°
Partly Cloudy with a 56% chance of rain.
Tue
36° 23°
Drizzle, 42% chance.
Wed
37° 23°
Heavy Rain, 82% chance.
Thu
35° 23°
Rain, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 34° Mostly Cloudy 43% 6 mph W 53%
3 PM 32° Overcast 62% 7 mph SE 63%
4 PM 32° Mostly Cloudy 62% 5 mph ESE 69%
5 PM 31° Partly Cloudy 62% 4 mph SW 72%
6 PM 28° Thunderstorm 71% 9 mph WNW 77%
7 PM 26° Rain 75% 5 mph SW 78%
8 PM 26° Rain 69% 4 mph SW 79%
9 PM 27° Mostly Cloudy 45% 4 mph SSW 81%
10 PM 26° Mostly Cloudy 24% 3 mph WSW 82%
11 PM 26° Mostly Cloudy 24% 3 mph W 84%
12 AM 25° Mostly Cloudy 12% 4 mph W 85%
1 AM 25° Mostly Cloudy 9% 3 mph W 87%
2 AM 25° Mostly Cloudy 9% 3 mph WSW 89%
3 AM 24° Mostly Cloudy 9% 4 mph WSW 91%
4 AM 24° Mostly Cloudy 9% 3 mph WSW 92%
5 AM 22° Mostly Cloudy 3% 3 mph WSW 92%
6 AM 22° Mostly Cloudy 3% 3 mph WSW 93%
7 AM 24° Mostly Cloudy 3% 3 mph W 84%
8 AM 26° Mostly Cloudy 3% 3 mph W 75%
9 AM 29° Mostly Cloudy 3% 3 mph W 67%
10 AM 31° Mostly Cloudy 3% 3 mph WNW 61%
11 AM 32° Mostly Cloudy 3% 4 mph WNW 56%
12 PM 33° Mostly Cloudy 3% 4 mph NW 50%
1 PM 34° Partly Cloudy 3% 4 mph NW 48%
15-Day Forecast
Today
8/21
Mostly Cloudy
69%
22°
36°
Sat
8/22
Partly Cloudy
9%
22°
39°
Sun
8/23
Partly Cloudy
52%
24°
39°
Mon
8/24
Partly Cloudy
56%
23°
36°
Tue
8/25
Drizzle
42%
23°
36°
Wed
8/26
Heavy Rain
82%
23°
37°
Thu
8/27
Rain
71%
23°
35°
Fri
8/28
Drizzle
53%
23°
37°
Sat
8/29
Drizzle
44%
23°
36°
Sun
8/30
Drizzle
44%
23°
38°
Mon
8/31
Drizzle
60%
23°
37°
Tue
9/1
Drizzle
60%
23°
37°
Wed
9/2
Drizzle
60%
23°
37°
Thu
9/3
Clear
60%
23°
37°
Fri
9/4
Drizzle
60%
22°
37°
47
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
47 AQI 8.4 µg/m³
O3
Ground-level ozone
34 AQI 38 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 47 Good 34 47
Sun 46 Good 35 46
Mon 54 Moderate 35 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 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
SBCAPE3135 J/kg
MLCAPE2704 J/kg
MUCAPE3135 J/kg
SBCIN-88 J/kg
MLCIN-41 J/kg
Lifted Index-7.2
Kinematics
0–6 km Shear14 kt
0–1 km Shear3 kt
Eff. Shear12 kt
0–1 km SRH5
0–3 km SRH27
Eff. SRH27
Storm Motion72° @ 13 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.9
Thermo & Levels
PWAT2.05 in
0–3 km LR7.8 °C/km
700–500 LR6.2 °C/km
Total Totals51.2
LCL851 hPa
LFC794 hPa
EL148 hPa
Freezing Lvl14,810 ft