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Tidal Potomac from Key Bridge to Indian Head MD, AN

Last updated: 10:24 PM CDT  ·  Refresh
29°C
Feels like 35°
Clear
▲ 36°  /  ▼ 25°
Wind
7 mph SW
Humidity
78%
Dew Point
24°
Pressure
29.95 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
2%
Sunrise
6:34 AM
Sunset
7:41 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Tidal Potomac from Key Bridge to Indian Head MD is currently clear at 29°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3284 J/kg) — isolated convective development possible. Sunrise: 6:34AM · Sunset: 7:41PM.

49 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
29°
3%
11 PM
29°
21%
12 AM
29°
14%
1 AM
28°
3%
2 AM
28°
3%
3 AM
27°
3%
4 AM
27°
3%
5 AM
25°
3%
6 AM
25°
3%
7 AM
25°
7%
8 AM
27°
16%
9 AM
28°
18%
10 AM
30°
27%
11 AM
32°
28%
12 PM
33°
28%
1 PM
37°
32%
2 PM
37°
36%
3 PM
36°
48%
4 PM
36°
47%
5 PM
36°
47%
6 PM
34°
48%
7 PM
33°
48%
8 PM
33°
48%
9 PM
32°
30%
7-Day Forecast
Tonight
36° 25°
Clear.
Fri
38° 25°
Mostly Clear with a 47% chance of rain.
Sat
39° 24°
Partly Cloudy.
Sun
41° 26°
Mostly Clear with a 75% chance of rain.
Mon
39° 25°
Rain, 65% chance.
Tue
38° 24°
Rain, 70% chance.
Wed
38° 24°
Rain, 55% chance.
TimeTempConditionsPrecipWindHumidity
Now 29° Clear 3% 7 mph SW 78%
11 PM 29° Clear 21% 6 mph SW 82%
12 AM 29° Clear 14% 5 mph WSW 85%
1 AM 28° Clear 3% 4 mph WSW 88%
2 AM 28° Mostly Clear 3% 5 mph WSW 87%
3 AM 27° Partly Cloudy 3% 5 mph WSW 86%
4 AM 27° Mostly Clear 3% 4 mph WSW 88%
5 AM 25° Mostly Clear 3% 4 mph WSW 89%
6 AM 25° Partly Cloudy 3% 3 mph WSW 91%
7 AM 25° Partly Cloudy 7% 4 mph WSW 90%
8 AM 27° Partly Cloudy 16% 6 mph W 82%
9 AM 28° Partly Cloudy 18% 7 mph W 74%
10 AM 30° Partly Cloudy 27% 7 mph W 67%
11 AM 32° Mostly Clear 28% 7 mph W 59%
12 PM 33° Mostly Clear 28% 6 mph W 52%
1 PM 37° Clear 32% 6 mph W 46%
2 PM 37° Clear 36% 6 mph W 46%
3 PM 36° Mostly Clear 48% 7 mph W 47%
4 PM 36° Mostly Clear 47% 8 mph WSW 49%
5 PM 36° Mostly Clear 47% 7 mph WSW 55%
6 PM 34° Partly Cloudy 48% 7 mph WSW 62%
7 PM 33° Partly Cloudy 48% 7 mph SW 67%
8 PM 33° Partly Cloudy 48% 6 mph SW 69%
9 PM 32° Mostly Cloudy 30% 6 mph SW 71%
15-Day Forecast
Today
8/20
Clear
3%
25°
36°
Fri
8/21
Mostly Clear
47%
25°
38°
Sat
8/22
Partly Cloudy
13%
24°
39°
Sun
8/23
Mostly Clear
75%
26°
41°
Mon
8/24
Rain
65%
25°
39°
Tue
8/25
Rain
70%
24°
38°
Wed
8/26
Rain
55%
24°
38°
Thu
8/27
Rain
82%
24°
36°
Fri
8/28
Rain
69%
23°
38°
Sat
8/29
Rain
68%
24°
38°
Sun
8/30
Drizzle
60%
24°
39°
Mon
8/31
Drizzle
60%
23°
38°
Tue
9/1
Drizzle
60%
23°
38°
Wed
9/2
Drizzle
60%
23°
37°
Thu
9/3
Drizzle
60%
23°
37°
49
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
49 AQI 8.9 µg/m³
O3
Ground-level ozone
31 AQI 34 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 49 Good 31 49
Sat 48 Good 38 48
Sun 39 Good 39 37
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 Fri Aug 21, 01:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2668 J/kg
MLCAPE2627 J/kg
MUCAPE4161 J/kg
SBCIN-135 J/kg
MLCIN-97 J/kg
Lifted Index-5.4
Kinematics
0–6 km Shear12 kt
0–1 km Shear4 kt
Eff. Shear15 kt
0–1 km SRH30
0–3 km SRH47
Eff. SRH47
Storm Motion90° @ 15 kt
0–1 km EHI0.5
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index27.0
Thermo & Levels
PWAT1.69 in
0–3 km LR5.7 °C/km
700–500 LR5.9 °C/km
Total Totals42.9
LCL944 hPa
LFC761 hPa
EL149 hPa
Freezing Lvl16,194 ft