Coastal Flood Warning — Lower St. Bernard, LA, Southeast St. Tammany, LA, Eastern Orleans, LA, Lower Plaquemines, LA, Southern Hancock, MS, Southern Harrison, MS, Southern Jackson, MS 4:00 AM

Ottawa, Canada

Last updated: 5:38 PM CDT  ·  Refresh
21°C
Feels like 22°
Mostly Cloudy
▲ 24°  /  ▼ 14°
Wind
6 mph S
Humidity
90%
Dew Point
19°
Pressure
29.26 inHg
Visibility
9 mi
UV Index
2.6
Cloud Cover
82%
Sunrise
5:34 AM
Sunset
8:42 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Ottawa is currently mostly cloudy at 21°C. Precipitation is likely — peak probability 73% around 10 PM. Atmospheric instability is elevated (CAPE up to 886 J/kg) — isolated convective development possible. Sunrise: 5:34AM · Sunset: 8:42PM.

Alerts

Coastal Flood Warning
Lower St. Bernard, LA, Southeast St. Tammany, LA, Eastern Orleans, LA, Lower Plaquemines, LA, Southern Hancock, MS, Southern Harrison, MS, Southern Jackson, MS
Expires 4:00 AM
70 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
21°
48%
7 PM
24°
52%
8 PM
23°
52%
9 PM
22°
55%
10 PM
22°
72%
11 PM
21°
70%
12 AM
21°
48%
1 AM
20°
48%
2 AM
19°
40%
3 AM
19°
40%
4 AM
18°
37%
5 AM
16°
29%
6 AM
15°
18%
7 AM
14°
13%
8 AM
14°
25%
9 AM
16°
25%
10 AM
16°
25%
11 AM
16°
35%
12 PM
16°
25%
1 PM
16°
21%
2 PM
16°
21%
3 PM
16°
20%
4 PM
16°
20%
5 PM
18°
20%
7-Day Forecast
Tonight
24° 14°
Mostly Cloudy with a 55% chance of rain.
Wed
21° 12°
Overcast with a 48% chance of rain.
Thu
26° 11°
Mostly Clear.
Fri
27° 12°
Partly Cloudy with a 49% chance of rain.
Sat
28° 13°
Overcast with a 38% chance of rain.
Sun
27° 16°
Rain, 86% chance.
Mon
26° 12°
Drizzle, 60% chance.
TimeTempConditionsPrecipWindHumidity
Now 21° Mostly Cloudy 48% 6 mph S 90%
7 PM 24° Overcast 52% 6 mph S 90%
8 PM 23° Mostly Cloudy 52% 6 mph S 91%
9 PM 22° Mostly Cloudy 55% 6 mph S 92%
10 PM 22° Overcast 72% 6 mph S 94%
11 PM 21° Overcast 70% 7 mph SSW 95%
12 AM 21° Overcast 48% 7 mph SSW 96%
1 AM 20° Overcast 48% 7 mph SSW 96%
2 AM 19° Mostly Cloudy 40% 8 mph SW 96%
3 AM 19° Mostly Cloudy 40% 8 mph SW 94%
4 AM 18° Mostly Cloudy 37% 9 mph WSW 92%
5 AM 16° Mostly Cloudy 29% 10 mph W 89%
6 AM 15° Mostly Cloudy 18% 10 mph W 86%
7 AM 14° Overcast 13% 10 mph W 83%
8 AM 14° Overcast 25% 11 mph W 80%
9 AM 16° Overcast 25% 12 mph WSW 76%
10 AM 16° Overcast 25% 12 mph WSW 72%
11 AM 16° Overcast 35% 12 mph WSW 72%
12 PM 16° Overcast 25% 13 mph WSW 73%
1 PM 16° Overcast 21% 13 mph WSW 74%
2 PM 16° Overcast 21% 13 mph WSW 74%
3 PM 16° Overcast 20% 13 mph WSW 74%
4 PM 16° Overcast 20% 12 mph WSW 73%
5 PM 18° Overcast 20% 12 mph W 73%
15-Day Forecast
Today
7/21
Mostly Cloudy
55%
14°
24°
Wed
7/22
Overcast
48%
12°
21°
Thu
7/23
Mostly Clear
3%
11°
26°
Fri
7/24
Partly Cloudy
49%
12°
27°
Sat
7/25
Overcast
38%
13°
28°
Sun
7/26
Rain
86%
16°
27°
Mon
7/27
Drizzle
60%
12°
26°
Tue
7/28
Drizzle
63%
12°
24°
Wed
7/29
Drizzle
68%
12°
24°
Thu
7/30
Drizzle
45%
12°
24°
Fri
7/31
Drizzle
46%
14°
24°
Sat
8/1
Drizzle
60%
13°
26°
Sun
8/2
Drizzle
60%
14°
27°
Mon
8/3
Drizzle
60%
15°
27°
Tue
8/4
Drizzle
60%
15°
27°
70
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
70 AQI 19.5 µg/m³
O3
Ground-level ozone
49 AQI 53 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 70 Moderate 49 70
Thu 27 Good 27 26
Fri 38 Good 34 38
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 50 60 70 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE491 J/kg
MLCAPE285 J/kg
MUCAPE491 J/kg
SBCIN-39 J/kg
MLCIN0 J/kg
Lifted Index-2.3
Kinematics
0–6 km Shear26 kt
0–1 km Shear31 kt
Eff. Shear27 kt
0–1 km SRH-1
0–3 km SRH-27
Eff. SRH-27
Storm Motion193° @ 40 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index24.7
Thermo & Levels
PWAT1.43 in
0–3 km LR5.2 °C/km
700–500 LR6.0 °C/km
Total Totals47.2
LCL969 hPa
LFC861 hPa
EL281 hPa
Freezing Lvl12,185 ft