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 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

Saint Helena Parish, Louisiana, United States

Last updated: 6:57 PM CDT  ·  Refresh
33°C
Feels like 36°
Clear
▲ 36°  /  ▼ 23°
Wind
6 mph SSW
Humidity
48%
Dew Point
21°
Pressure
29.72 inHg
Visibility
10 mi
UV Index
2.4
Cloud Cover
9%
Sunrise
6:32 AM
Sunset
7:39 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Saint Helena Parish is currently clear at 33°C. Precipitation is likely — peak probability 64% around 5 PM. Atmospheric instability is elevated (CAPE up to 3251 J/kg) — isolated convective development possible. Sunrise: 6:32AM · Sunset: 7:39PM.

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 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
51 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
33°
21%
7 PM
31°
37%
8 PM
30°
37%
9 PM
28°
37%
10 PM
28°
30%
11 PM
27°
24%
12 AM
26°
17%
1 AM
26°
13%
2 AM
26°
13%
3 AM
25°
11%
4 AM
25°
9%
5 AM
23°
9%
6 AM
23°
4%
7 AM
26°
11%
8 AM
27°
19%
9 AM
29°
20%
10 AM
31°
32%
11 AM
32°
38%
12 PM
33°
38%
1 PM
36°
45%
2 PM
36°
49%
3 PM
36°
49%
4 PM
34°
57%
5 PM
31°
63%
7-Day Forecast
Tonight
36° 23°
Clear with a 37% chance of rain.
Fri
38° 23°
Mostly Clear with a 60% chance of rain.
Sat
38° 23°
Mostly Clear with a 20% chance of rain.
Sun
40° 24°
Mostly Clear with a 65% chance of rain.
Mon
38° 23°
Rain, 56% chance.
Tue
38° 23°
Rain, 65% chance.
Wed
38° 23°
Rain, 65% chance.
TimeTempConditionsPrecipWindHumidity
Now 33° Clear 21% 6 mph SSW 48%
7 PM 31° Mostly Clear 37% 4 mph S 54%
8 PM 30° Mostly Clear 37% 4 mph SSE 60%
9 PM 28° Partly Cloudy 37% 4 mph SSE 66%
10 PM 28° Partly Cloudy 30% 5 mph SSW 70%
11 PM 27° Partly Cloudy 24% 5 mph SW 78%
12 AM 26° Partly Cloudy 17% 5 mph WSW 82%
1 AM 26° Mostly Clear 13% 5 mph W 84%
2 AM 26° Mostly Clear 13% 4 mph W 85%
3 AM 25° Mostly Clear 11% 4 mph W 87%
4 AM 25° Mostly Clear 9% 4 mph W 88%
5 AM 23° Mostly Clear 9% 3 mph W 89%
6 AM 23° Mostly Clear 4% 3 mph W 91%
7 AM 26° Mostly Clear 11% 5 mph W 83%
8 AM 27° Clear 19% 6 mph W 76%
9 AM 29° Clear 20% 6 mph W 68%
10 AM 31° Mostly Clear 32% 6 mph W 61%
11 AM 32° Mostly Clear 38% 6 mph W 53%
12 PM 33° Mostly Clear 38% 5 mph W 45%
1 PM 36° Mostly Clear 45% 5 mph W 45%
2 PM 36° Mostly Clear 49% 5 mph W 44%
3 PM 36° Mostly Clear 49% 5 mph W 44%
4 PM 34° Partly Cloudy 57% 4 mph W 49%
5 PM 31° Partly Cloudy 63% 4 mph SW 54%
15-Day Forecast
Today
8/20
Clear
37%
23°
36°
Fri
8/21
Mostly Clear
60%
23°
38°
Sat
8/22
Mostly Clear
20%
23°
38°
Sun
8/23
Mostly Clear
65%
24°
40°
Mon
8/24
Rain
56%
23°
38°
Tue
8/25
Rain
65%
23°
38°
Wed
8/26
Rain
65%
23°
38°
Thu
8/27
Rain
74%
23°
35°
Fri
8/28
Drizzle
54%
22°
38°
Sat
8/29
Rain
66%
23°
39°
Sun
8/30
Mostly Clear
40%
23°
37°
Mon
8/31
Drizzle
60%
23°
37°
Tue
9/1
Drizzle
60%
23°
37°
Wed
9/2
Drizzle
60%
23°
37°
Thu
9/3
Drizzle
60%
23°
38°
51
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
51 AQI 9.2 µg/m³
O3
Ground-level ozone
32 AQI 36 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Fri 51 Moderate 32 51
Sat 49 Good 34 49
Sun 42 Good 34 42
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 Thu Aug 20, 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
SBCAPE1724 J/kg
MLCAPE1462 J/kg
MUCAPE1724 J/kg
SBCIN-94 J/kg
MLCIN-33 J/kg
Lifted Index-3.8
Kinematics
0–6 km Shear17 kt
0–1 km Shear4 kt
Eff. Shear19 kt
0–1 km SRH14
0–3 km SRH29
Eff. SRH29
Storm Motion69° @ 13 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index32.3
Thermo & Levels
PWAT1.80 in
0–3 km LR7.2 °C/km
700–500 LR5.9 °C/km
Total Totals47.5
LCL847 hPa
LFC788 hPa
EL175 hPa
Freezing Lvl16,178 ft