High Surf Advisory — Southern Bristol, MA, Southern Plymouth, MA, Barnstable, MA, Dukes, MA, Nantucket, MA, Washington, RI, Newport, RI, Block Island, RI 7:00 PM

South County, Rhode Island, United States

Last updated: 2:39 PM CDT  ·  Refresh
22°C
Feels like 22°
Overcast
▲ 24°  /  ▼ 18°
Wind
12 mph SE
Humidity
89%
Dew Point
20°
Pressure
29.67 inHg
Visibility
10 mi
UV Index
3.0
Cloud Cover
95%
Sunrise
5:31 AM
Sunset
8:14 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: South County is currently overcast at 22°C. Precipitation is likely — peak probability 90% around 3 PM. Atmospheric instability is elevated (CAPE up to 1461 J/kg) — isolated convective development possible. Sunrise: 5:31AM · Sunset: 8:14PM.

Alerts

High Surf Advisory
Southern Bristol, MA, Southern Plymouth, MA, Barnstable, MA, Dukes, MA, Nantucket, MA, Washington, RI, Newport, RI, Block Island, RI
Expires 7:00 PM
62 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
90%
4 PM
23°
90%
5 PM
23°
83%
6 PM
23°
83%
7 PM
22°
84%
8 PM
22°
73%
9 PM
21°
74%
10 PM
21°
70%
11 PM
21°
74%
12 AM
21°
55%
1 AM
21°
49%
2 AM
21°
50%
3 AM
21°
50%
4 AM
21°
59%
5 AM
21°
59%
6 AM
22°
59%
7 AM
22°
59%
8 AM
22°
59%
9 AM
24°
59%
10 AM
25°
53%
11 AM
26°
54%
12 PM
26°
54%
1 PM
27°
54%
2 PM
27°
57%
7-Day Forecast
Today
24° 18°
Overcast with a 90% chance of rain.
Wed
29° 19°
Mostly Cloudy with a 59% chance of rain.
Thu
26° 16°
Partly Cloudy with a 40% chance of rain.
Fri
26° 15°
Partly Cloudy.
Sat
27° 16°
Clear.
Sun
27° 16°
Drizzle, 81% chance.
Mon
28° 18°
Drizzle, 60% chance.
TimeTempConditionsPrecipWindHumidity
Now 22° Overcast 90% 12 mph SE 89%
4 PM 23° Overcast 90% 13 mph SSE 95%
5 PM 23° Overcast 83% 13 mph SSE 98%
6 PM 23° Rain 83% 11 mph S 98%
7 PM 22° Heavy Rain 84% 10 mph S 98%
8 PM 22° Heavy Rain 73% 10 mph SSW 98%
9 PM 21° Heavy Rain 74% 9 mph SSW 98%
10 PM 21° Overcast 70% 10 mph SSW 97%
11 PM 21° Overcast 74% 12 mph SSW 97%
12 AM 21° Overcast 55% 12 mph SSW 97%
1 AM 21° Overcast 49% 12 mph SSW 96%
2 AM 21° Overcast 50% 12 mph SSW 96%
3 AM 21° Overcast 50% 12 mph SSW 95%
4 AM 21° Haze 59% 12 mph SSW 94%
5 AM 21° Overcast 59% 11 mph SSW 94%
6 AM 22° Overcast 59% 11 mph SSW 92%
7 AM 22° Overcast 59% 11 mph SSW 91%
8 AM 22° Mostly Cloudy 59% 12 mph SSW 88%
9 AM 24° Mostly Cloudy 59% 12 mph SSW 85%
10 AM 25° Mostly Cloudy 53% 12 mph SSW 81%
11 AM 26° Mostly Cloudy 54% 12 mph SSW 79%
12 PM 26° Partly Cloudy 54% 12 mph SSW 77%
1 PM 27° Partly Cloudy 54% 12 mph SSW 76%
2 PM 27° Partly Cloudy 57% 12 mph SSW 76%
15-Day Forecast
Today
7/21
Overcast
90%
18°
24°
Wed
7/22
Mostly Cloudy
59%
19°
29°
Thu
7/23
Partly Cloudy
40%
16°
26°
Fri
7/24
Partly Cloudy
7%
15°
26°
Sat
7/25
Clear
19%
16°
27°
Sun
7/26
Drizzle
81%
16°
27°
Mon
7/27
Drizzle
60%
18°
28°
Tue
7/28
Drizzle
60%
17°
28°
Wed
7/29
Drizzle
60%
17°
27°
Thu
7/30
Drizzle
60%
16°
27°
Fri
7/31
Drizzle
60%
18°
27°
Sat
8/1
Drizzle
60%
18°
26°
Sun
8/2
Drizzle
60%
18°
27°
Mon
8/3
Drizzle
60%
19°
27°
Tue
8/4
Drizzle
60%
19°
28°
62
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
62 AQI 14.9 µg/m³
O3
Ground-level ozone
38 AQI 41 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 62 Moderate 38 62
Thu 46 Good 46 26
Fri 32 Good 32 23
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, 18:00'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
SBCAPE110 J/kg
MLCAPE122 J/kg
MUCAPE288 J/kg
SBCIN-104 J/kg
MLCIN0 J/kg
Lifted Index-0.2
Kinematics
0–6 km Shear41 kt
0–1 km Shear20 kt
Eff. Shear30 kt
0–1 km SRH65
0–3 km SRH40
Eff. SRH40
Storm Motion185° @ 37 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.1
STP (eff)0.0
Supercell0.2
K-Index34.0
Thermo & Levels
PWAT1.87 in
0–3 km LR5.3 °C/km
700–500 LR5.1 °C/km
Total Totals44.0
LCL970 hPa
LFC747 hPa
EL484 hPa
Freezing Lvl13,694 ft