Small Craft Advisory — Chesapeake Bay north of Pooles Island MD, AN, Chesapeake Bay from Pooles Island to Sandy Point MD, AN, Chesapeake Bay from Sandy Point to North Beach MD, AN, Chesapeake Bay from North Beach to Drum Point MD, AN, Chesapeake Bay from Drum Point MD to Smith Point VA, AN, Tidal Potomac from Key Bridge to Indian Head MD, AN, Tidal Potomac from Indian Head to Cobb Island MD, AN, Tidal Potomac from Cobb Island MD to Smith Point VA, AN, Patapsco River including Baltimore Harbor, AN, Chester River to Queenstown MD, AN, Eastern Bay, AN, Choptank River to Cambridge MD and the Little Choptank River, AN, Patuxent River to Broomes Island MD, AN, Tangier Sound and the inland waters surrounding Bloodsworth Island, AN 11:00 PM

Somerset County, Maryland, United States

Last updated: 9:10 PM CDT  ·  Refresh
26°C
Feels like 28°
Rain
▲ 31°  /  ▼ 19°
Wind
10 mph SW
Humidity
86%
Dew Point
24°
Pressure
29.96 inHg
Visibility
5 mi
UV Index
0.0
Cloud Cover
65%
Sunrise
6:23 AM
Sunset
7:50 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Somerset County is currently rain at 26°C. Precipitation is likely — peak probability 63% around 11 PM. Atmospheric instability is elevated (CAPE up to 699 J/kg) — isolated convective development possible. Sunrise: 6:23AM · Sunset: 7:50PM.

48 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
61%
11 PM
26°
62%
12 AM
25°
41%
1 AM
24°
28%
2 AM
23°
10%
3 AM
22°
11%
4 AM
22°
13%
5 AM
20°
4%
6 AM
20°
4%
7 AM
20°
5%
8 AM
19°
5%
9 AM
20°
5%
10 AM
21°
5%
11 AM
22°
13%
12 PM
22°
17%
1 PM
24°
17%
2 PM
25°
17%
3 PM
25°
35%
4 PM
25°
35%
5 PM
26°
32%
6 PM
26°
32%
7 PM
26°
32%
8 PM
26°
32%
9 PM
24°
46%
7-Day Forecast
Tonight
31° 19°
Rain, 61% chance.
Fri
26° 19°
Partly Cloudy with a 46% chance of rain.
Sat
27° 22°
Heavy Rain, 90% chance.
Sun
29° 22°
Partly Cloudy with a 55% chance of rain.
Mon
27° 21°
Clear with a 43% chance of rain.
Tue
27° 21°
Heavy Rain, 74% chance.
Wed
28° 21°
Rain, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 26° Rain 61% 10 mph SW 86%
11 PM 26° Mostly Cloudy 62% 8 mph NNW 85%
12 AM 25° Partly Cloudy 41% 10 mph NNW 86%
1 AM 24° Mostly Cloudy 28% 14 mph NNW 89%
2 AM 23° Partly Cloudy 10% 14 mph NNW 91%
3 AM 22° Mostly Cloudy 11% 13 mph N 91%
4 AM 22° Overcast 13% 14 mph N 91%
5 AM 20° Overcast 4% 13 mph N 91%
6 AM 20° Mostly Cloudy 4% 13 mph N 91%
7 AM 20° Partly Cloudy 5% 13 mph N 90%
8 AM 19° Partly Cloudy 5% 12 mph N 88%
9 AM 20° Partly Cloudy 5% 11 mph N 86%
10 AM 21° Partly Cloudy 5% 10 mph N 83%
11 AM 22° Partly Cloudy 13% 9 mph N 80%
12 PM 22° Partly Cloudy 17% 8 mph N 77%
1 PM 24° Partly Cloudy 17% 7 mph N 74%
2 PM 25° Partly Cloudy 17% 6 mph N 71%
3 PM 25° Partly Cloudy 35% 6 mph N 72%
4 PM 25° Partly Cloudy 35% 7 mph NNE 74%
5 PM 26° Partly Cloudy 32% 8 mph NNE 76%
6 PM 26° Partly Cloudy 32% 8 mph NE 76%
7 PM 26° Partly Cloudy 32% 8 mph NE 77%
8 PM 26° Partly Cloudy 32% 8 mph NE 78%
9 PM 24° Mostly Cloudy 46% 8 mph ENE 79%
15-Day Forecast
Today
8/20
Rain
61%
19°
31°
Fri
8/21
Partly Cloudy
46%
19°
26°
Sat
8/22
Heavy Rain
90%
22°
27°
Sun
8/23
Partly Cloudy
55%
22°
29°
Mon
8/24
Clear
43%
21°
27°
Tue
8/25
Heavy Rain
74%
21°
27°
Wed
8/26
Rain
71%
21°
28°
Thu
8/27
Rain
82%
22°
28°
Fri
8/28
Drizzle
69%
22°
29°
Sat
8/29
Rain
68%
22°
29°
Sun
8/30
Drizzle
64%
22°
30°
Mon
8/31
Drizzle
60%
21°
28°
Tue
9/1
Drizzle
60%
21°
26°
Wed
9/2
Drizzle
60%
20°
26°
Thu
9/3
Drizzle
60%
21°
26°
48
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
41 AQI 7.3 µg/m³
O3
Ground-level ozone
Dominant
48 AQI 52 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 48 Good 48 41
Sat 35 Good 35 26
Sun 43 Good 43 13
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, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1410 J/kg
MLCAPE1141 J/kg
MUCAPE1511 J/kg
SBCIN-2 J/kg
MLCIN-0 J/kg
Lifted Index-3.9
Kinematics
0–6 km Shear31 kt
0–1 km Shear19 kt
Eff. Shear32 kt
0–1 km SRH-16
0–3 km SRH13
Eff. SRH13
Storm Motion278° @ 30 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.1
Supercell0.3
K-Index39.4
Thermo & Levels
PWAT2.53 in
0–3 km LR5.5 °C/km
700–500 LR5.3 °C/km
Total Totals46.3
LCL988 hPa
LFC968 hPa
EL180 hPa
Freezing Lvl15,020 ft