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 7:00 PM

Saint Helena Parish, Louisiana, United States

Last updated: 10:55 AM CDT  ·  Refresh
32°C
Feels like 37°
Mostly Clear
▲ 36°  /  ▼ 24°
Wind
5 mph N
Humidity
63%
Dew Point
25°
Pressure
29.65 inHg
Visibility
10 mi
UV Index
8.9
Cloud Cover
25%
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 mostly clear at 32°C. Precipitation is likely — peak probability 51% around 11 AM. Atmospheric instability is elevated (CAPE up to 2750 J/kg) — isolated convective development possible. Sunrise: 6:13AM · Sunset: 8:04PM.

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, 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 7:00 PM
62 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
32°
30%
11 AM
32°
51%
12 PM
32°
46%
1 PM
33°
47%
2 PM
34°
43%
3 PM
34°
43%
4 PM
34°
35%
5 PM
34°
23%
6 PM
32°
29%
7 PM
31°
37%
8 PM
31°
37%
9 PM
28°
18%
10 PM
28°
18%
11 PM
27°
19%
12 AM
27°
17%
1 AM
26°
17%
2 AM
26°
17%
3 AM
25°
8%
4 AM
25°
9%
5 AM
24°
9%
6 AM
24°
3%
7 AM
25°
9%
8 AM
26°
12%
9 AM
28°
22%
7-Day Forecast
Today
36° 24°
Partly Cloudy with a 47% chance of rain.
Wed
36° 24°
Partly Cloudy with a 66% chance of rain.
Thu
33° 24°
Partly Cloudy with a 72% chance of rain.
Fri
34° 23°
Partly Cloudy with a 66% chance of rain.
Sat
35° 23°
Rain, 69% chance.
Sun
35° 22°
Drizzle, 51% chance.
Mon
36° 22°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 32° Mostly Clear 30% 5 mph N 63%
11 AM 32° Partly Cloudy 51% 5 mph N 62%
12 PM 32° Partly Cloudy 46% 6 mph N 62%
1 PM 33° Mostly Cloudy 47% 7 mph N 62%
2 PM 34° Partly Cloudy 43% 7 mph NNW 61%
3 PM 34° Mostly Clear 43% 8 mph N 59%
4 PM 34° Mostly Clear 35% 8 mph NNW 63%
5 PM 34° Partly Cloudy 23% 7 mph NNW 66%
6 PM 32° Partly Cloudy 29% 7 mph N 69%
7 PM 31° Rain 37% 7 mph NNE 72%
8 PM 31° Partly Cloudy 37% 5 mph NNW 74%
9 PM 28° Mostly Clear 18% 5 mph N 76%
10 PM 28° Mostly Clear 18% 6 mph N 79%
11 PM 27° Clear 19% 5 mph NNE 82%
12 AM 27° Clear 17% 5 mph NE 84%
1 AM 26° Mostly Clear 17% 4 mph NNE 85%
2 AM 26° Partly Cloudy 17% 4 mph NNE 86%
3 AM 25° Mostly Cloudy 8% 4 mph NNE 87%
4 AM 25° Partly Cloudy 9% 5 mph NNE 86%
5 AM 24° Partly Cloudy 9% 6 mph NNE 86%
6 AM 24° Partly Cloudy 3% 6 mph NNE 85%
7 AM 25° Partly Cloudy 9% 7 mph NNE 81%
8 AM 26° Mostly Clear 12% 8 mph NNE 75%
9 AM 28° Mostly Clear 22% 8 mph NNE 70%
15-Day Forecast
Today
7/21
Partly Cloudy
47%
24°
36°
Wed
7/22
Partly Cloudy
66%
24°
36°
Thu
7/23
Partly Cloudy
72%
24°
33°
Fri
7/24
Partly Cloudy
66%
23°
34°
Sat
7/25
Rain
69%
23°
35°
Sun
7/26
Drizzle
51%
22°
35°
Mon
7/27
Clear
17%
22°
36°
Tue
7/28
Drizzle
42%
23°
37°
Wed
7/29
Drizzle
44%
23°
37°
Thu
7/30
Drizzle
44%
24°
37°
Fri
7/31
Drizzle
60%
24°
37°
Sat
8/1
Drizzle
60%
23°
36°
Sun
8/2
Drizzle
60%
23°
36°
Mon
8/3
Drizzle
60%
23°
35°
Tue
8/4
Rain
90%
23°
34°
62
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
62 AQI 15.1 µg/m³
O3
Ground-level ozone
26 AQI 29 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 62 Moderate 26 62
Thu 45 Good 29 45
Fri 45 Good 33 45
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, 14:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2831 J/kg
MLCAPE1897 J/kg
MUCAPE2831 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-4.8
Kinematics
0–6 km Shear19 kt
0–1 km Shear12 kt
Eff. Shear29 kt
0–1 km SRH-23
0–3 km SRH-42
Eff. SRH-42
Storm Motion347° @ 28 kt
0–1 km EHI-0.4
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index38.7
Thermo & Levels
PWAT2.38 in
0–3 km LR7.0 °C/km
700–500 LR4.9 °C/km
Total Totals43.2
LCL905 hPa
LFC1004 hPa
EL132 hPa
Freezing Lvl17,270 ft