Excessive Heat 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

Saint Helena Parish, Louisiana, United States

Last updated: 10:54 PM CDT  ·  Refresh
25°C
Feels like 29°
Mostly Clear
▲ 36°  /  ▼ 22°
Wind
3 mph SE
Humidity
90%
Dew Point
24°
Pressure
29.85 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
24%
Sunrise
6:29 AM
Sunset
7:43 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Saint Helena Parish is currently mostly clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2515 J/kg) — isolated convective development possible. Sunrise: 6:29AM · Sunset: 7:43PM.

Alerts

Excessive Heat 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
47 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
27%
11 PM
26°
24%
12 AM
26°
9%
1 AM
25°
4%
2 AM
25°
4%
3 AM
25°
4%
4 AM
25°
3%
5 AM
23°
3%
6 AM
23°
3%
7 AM
26°
3%
8 AM
27°
5%
9 AM
30°
10%
10 AM
32°
19%
11 AM
33°
19%
12 PM
34°
25%
1 PM
36°
26%
2 PM
36°
24%
3 PM
36°
24%
4 PM
34°
24%
5 PM
32°
25%
6 PM
31°
25%
7 PM
30°
25%
8 PM
30°
26%
9 PM
30°
16%
7-Day Forecast
Tonight
36° 22°
Mostly Clear with a 27% chance of rain.
Mon
37° 23°
Mostly Clear with a 26% chance of rain.
Tue
40° 24°
Partly Cloudy with a 57% chance of rain.
Wed
39° 24°
Mostly Clear with a 57% chance of rain.
Thu
41° 22°
Mostly Cloudy with a 37% chance of rain.
Fri
39° 23°
Heavy Rain, 82% chance.
Sat
38° 22°
Heavy Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 25° Mostly Clear 27% 3 mph SE 90%
11 PM 26° Mostly Clear 24% 4 mph S 90%
12 AM 26° Mostly Clear 9% 4 mph SW 90%
1 AM 25° Mostly Clear 4% 4 mph SW 91%
2 AM 25° Mostly Clear 4% 4 mph SW 92%
3 AM 25° Mostly Clear 4% 4 mph WSW 94%
4 AM 25° Mostly Clear 3% 4 mph WSW 94%
5 AM 23° Mostly Clear 3% 4 mph W 94%
6 AM 23° Mostly Clear 3% 4 mph W 94%
7 AM 26° Partly Cloudy 3% 5 mph W 86%
8 AM 27° Mostly Clear 5% 5 mph W 76%
9 AM 30° Mostly Clear 10% 5 mph W 67%
10 AM 32° Mostly Clear 19% 5 mph WNW 61%
11 AM 33° Mostly Clear 19% 4 mph W 54%
12 PM 34° Mostly Clear 25% 4 mph W 48%
1 PM 36° Mostly Clear 26% 4 mph W 48%
2 PM 36° Mostly Clear 24% 5 mph WSW 48%
3 PM 36° Mostly Clear 24% 6 mph WSW 49%
4 PM 34° Mostly Clear 24% 5 mph SW 53%
5 PM 32° Mostly Clear 25% 5 mph SW 58%
6 PM 31° Partly Cloudy 25% 6 mph SSW 63%
7 PM 30° Partly Cloudy 25% 6 mph SSW 64%
8 PM 30° Partly Cloudy 26% 6 mph SSW 64%
9 PM 30° Partly Cloudy 16% 6 mph SW 64%
15-Day Forecast
Today
8/16
Mostly Clear
27%
22°
36°
Mon
8/17
Mostly Clear
26%
23°
37°
Tue
8/18
Partly Cloudy
57%
24°
40°
Wed
8/19
Mostly Clear
57%
24°
39°
Thu
8/20
Mostly Cloudy
37%
22°
41°
Fri
8/21
Heavy Rain
82%
23°
39°
Sat
8/22
Heavy Rain
82%
22°
38°
Sun
8/23
Thunderstorm
28%
21°
39°
Mon
8/24
Thunderstorm
44%
23°
39°
Tue
8/25
Drizzle
44%
23°
39°
Wed
8/26
Clear
60%
23°
39°
Thu
8/27
Drizzle
60%
23°
39°
Fri
8/28
Drizzle
60%
23°
39°
Sat
8/29
Drizzle
60%
23°
38°
Sun
8/30
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 8.6 µg/m³
O3
Ground-level ozone
25 AQI 27 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 47 Good 25 47
Tue 52 Moderate 30 52
Wed 52 Moderate 34 52
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, 02:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE842 J/kg
MLCAPE504 J/kg
MUCAPE842 J/kg
SBCIN-278 J/kg
MLCIN-190 J/kg
Lifted Index-2.4
Kinematics
0–6 km Shear4 kt
0–1 km Shear13 kt
Eff. Shear11 kt
0–1 km SRH78
0–3 km SRH75
Eff. SRH77
Storm Motion64° @ 19 kt
0–1 km EHI0.4
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index31.0
Thermo & Levels
PWAT1.98 in
0–3 km LR4.7 °C/km
700–500 LR5.4 °C/km
Total Totals44.8
LCL990 hPa
LFC765 hPa
EL177 hPa
Freezing Lvl17,051 ft