Excessive 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 8:00 PM

Saint Helena Parish, Louisiana, United States

Last updated: 5:36 PM CDT  ·  Refresh
33°C
Feels like 41°
Partly Cloudy
▲ 34°  /  ▼ 23°
Wind
8 mph NNW
Humidity
63%
Dew Point
26°
Pressure
29.56 inHg
Visibility
10 mi
UV Index
5.8
Cloud Cover
33%
Sunrise
6:13 AM
Sunset
8:04 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Saint Helena Parish is currently partly cloudy at 33°C. Precipitation is likely — peak probability 59% around 8 PM. Atmospheric instability is elevated (CAPE up to 2926 J/kg) — isolated convective development possible. Sunrise: 6:13AM · Sunset: 8:04PM.

Alerts

Excessive 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
Expires 8:00 PM
61 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
33°
43%
6 PM
33°
45%
7 PM
32°
51%
8 PM
31°
59%
9 PM
29°
27%
10 PM
28°
27%
11 PM
28°
21%
12 AM
27°
19%
1 AM
27°
5%
2 AM
26°
5%
3 AM
26°
5%
4 AM
26°
3%
5 AM
24°
3%
6 AM
23°
3%
7 AM
24°
5%
8 AM
26°
11%
9 AM
28°
15%
10 AM
29°
24%
11 AM
30°
29%
12 PM
32°
29%
1 PM
33°
31%
2 PM
32°
34%
3 PM
32°
43%
4 PM
32°
44%
7-Day Forecast
Today
34° 23°
Partly Cloudy with a 59% chance of rain.
Wed
35° 23°
Partly Cloudy with a 40% chance of rain.
Thu
32° 24°
Mostly Cloudy with a 62% chance of rain.
Fri
33° 23°
Mostly Cloudy with a 53% chance of rain.
Sat
34° 23°
Drizzle, 53% chance.
Sun
34° 22°
Mostly Cloudy.
Mon
35° 23°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 33° Partly Cloudy 43% 8 mph NNW 63%
6 PM 33° Mostly Clear 45% 6 mph NW 73%
7 PM 32° Partly Cloudy 51% 5 mph NNW 78%
8 PM 31° Partly Cloudy 59% 6 mph N 80%
9 PM 29° Partly Cloudy 27% 5 mph N 82%
10 PM 28° Mostly Clear 27% 4 mph N 82%
11 PM 28° Clear 21% 4 mph NNE 83%
12 AM 27° Clear 19% 4 mph NNE 84%
1 AM 27° Clear 5% 4 mph NNE 84%
2 AM 26° Mostly Clear 5% 4 mph NNE 83%
3 AM 26° Mostly Clear 5% 4 mph N 84%
4 AM 26° Mostly Clear 3% 5 mph N 84%
5 AM 24° Mostly Clear 3% 6 mph N 84%
6 AM 23° Mostly Clear 3% 7 mph N 85%
7 AM 24° Mostly Clear 5% 8 mph N 82%
8 AM 26° Partly Cloudy 11% 9 mph NNE 77%
9 AM 28° Partly Cloudy 15% 10 mph NNE 72%
10 AM 29° Partly Cloudy 24% 10 mph NNE 66%
11 AM 30° Partly Cloudy 29% 11 mph NNE 62%
12 PM 32° Partly Cloudy 29% 11 mph NNE 58%
1 PM 33° Partly Cloudy 31% 11 mph NNE 58%
2 PM 32° Partly Cloudy 34% 11 mph NE 60%
3 PM 32° Partly Cloudy 43% 11 mph NE 61%
4 PM 32° Partly Cloudy 44% 11 mph NE 64%
15-Day Forecast
Today
7/21
Partly Cloudy
59%
23°
34°
Wed
7/22
Partly Cloudy
40%
23°
35°
Thu
7/23
Mostly Cloudy
62%
24°
32°
Fri
7/24
Mostly Cloudy
53%
23°
33°
Sat
7/25
Drizzle
53%
23°
34°
Sun
7/26
Mostly Cloudy
8%
22°
34°
Mon
7/27
Clear
8%
23°
35°
Tue
7/28
Partly Cloudy
20%
23°
36°
Wed
7/29
Drizzle
68%
23°
36°
Thu
7/30
Drizzle
60%
23°
35°
Fri
7/31
Drizzle
51%
23°
34°
Sat
8/1
Drizzle
60%
23°
35°
Sun
8/2
Drizzle
60%
23°
34°
Mon
8/3
Drizzle
60%
23°
34°
Tue
8/4
Drizzle
60%
23°
34°
61
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
61 AQI 14.4 µg/m³
O3
Ground-level ozone
26 AQI 29 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 61 Moderate 26 61
Thu 38 Good 27 38
Fri 39 Good 35 39
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 Tue Jul 21, 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
SBCAPE3965 J/kg
MLCAPE3442 J/kg
MUCAPE3965 J/kg
SBCIN-20 J/kg
MLCIN0 J/kg
Lifted Index-6.4
Kinematics
0–6 km Shear20 kt
0–1 km Shear12 kt
Eff. Shear33 kt
0–1 km SRH-18
0–3 km SRH-42
Eff. SRH-42
Storm Motion358° @ 29 kt
0–1 km EHI-0.5
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.7
Thermo & Levels
PWAT2.27 in
0–3 km LR7.1 °C/km
700–500 LR5.2 °C/km
Total Totals46.1
LCL896 hPa
LFC875 hPa
EL120 hPa
Freezing Lvl17,372 ft