Storm Warning — Boston Harbor, AN, Narragansett Bay, AN 9:00 AM Flood Watch 1:00 AM

Suffolk County, Massachusetts, United States

Last updated: 4:43 PM CDT  ·  Refresh
14°C
Feels like 6°
Rain
▲ 16°  /  ▼ 14°
Wind
31 mph NNE
Humidity
85%
Dew Point
12°
Pressure
29.84 inHg
Visibility
1 mi
UV Index
0.9
Cloud Cover
98%
Sunrise
6:35 AM
Sunset
6:34 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Suffolk County is currently rain at 14°C. Precipitation is likely — peak probability 90% around 5 PM. Sunrise: 6:35AM · Sunset: 6:34PM.

Alerts

Storm Warning
Boston Harbor, AN, Narragansett Bay, AN
Expires 9:00 AM
Flood Watch
Expires 1:00 AM
31 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
14°
90%
6 PM
14°
90%
7 PM
14°
90%
8 PM
14°
85%
9 PM
14°
84%
10 PM
14°
82%
11 PM
14°
81%
12 AM
14°
81%
1 AM
14°
81%
2 AM
15°
90%
3 AM
14°
90%
4 AM
15°
90%
5 AM
14°
90%
6 AM
14°
90%
7 AM
14°
90%
8 AM
15°
90%
9 AM
16°
90%
10 AM
16°
90%
11 AM
16°
90%
12 PM
16°
90%
1 PM
17°
90%
2 PM
17°
90%
3 PM
17°
79%
4 PM
17°
80%
7-Day Forecast
Today
16° 14°
Rain, 90% chance.
Sun
17° 14°
Overcast with a 90% chance of rain.
Mon
17° 13°
Overcast with a 90% chance of rain.
Tue
16° 13°
Overcast with a 60% chance of rain.
Wed
19° 13°
Clear.
Thu
24° 12°
Drizzle, 43% chance.
Fri
22° 11°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 14° Rain 90% 31 mph NNE 85%
6 PM 14° Overcast 90% 30 mph NNE 85%
7 PM 14° Heavy Rain 90% 30 mph NNE 90%
8 PM 14° Overcast 85% 31 mph NNE 93%
9 PM 14° Overcast 84% 31 mph NNE 94%
10 PM 14° Heavy Rain 82% 31 mph NNE 94%
11 PM 14° Heavy Rain 81% 32 mph NNE 94%
12 AM 14° Overcast 81% 31 mph NNE 95%
1 AM 14° Overcast 81% 31 mph NNE 95%
2 AM 15° Overcast 90% 31 mph NE 95%
3 AM 14° Heavy Rain 90% 32 mph NE 96%
4 AM 15° Heavy Rain 90% 32 mph NE 96%
5 AM 14° Heavy Rain 90% 31 mph NE 96%
6 AM 14° Overcast 90% 31 mph NE 96%
7 AM 14° Overcast 90% 30 mph NE 97%
8 AM 15° Overcast 90% 29 mph NE 97%
9 AM 16° Overcast 90% 29 mph NE 97%
10 AM 16° Overcast 90% 28 mph NE 97%
11 AM 16° Heavy Rain 90% 27 mph NE 97%
12 PM 16° Heavy Rain 90% 25 mph NE 97%
1 PM 17° Heavy Rain 90% 23 mph ENE 98%
2 PM 17° Heavy Rain 90% 23 mph ENE 97%
3 PM 17° Heavy Rain 79% 22 mph ENE 97%
4 PM 17° Mostly Cloudy 80% 22 mph ENE 97%
15-Day Forecast
Today
9/26
Rain
90%
14°
16°
Sun
9/27
Overcast
90%
14°
17°
Mon
9/28
Overcast
90%
13°
17°
Tue
9/29
Overcast
60%
13°
16°
Wed
9/30
Clear
8%
13°
19°
Thu
10/1
Drizzle
43%
12°
24°
Fri
10/2
Clear
8%
11°
22°
Sat
10/3
Drizzle
44%
11°
18°
Sun
10/4
Rain
68%
12°
19°
Mon
10/5
Drizzle
51%
13°
24°
Tue
10/6
Drizzle
60%
10°
23°
Wed
10/7
Drizzle
60%
10°
17°
Thu
10/8
Clear
60%
9°
16°
Fri
10/9
Clear
25%
8°
16°
Sat
10/10
Drizzle
60%
9°
17°
31
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
17 AQI 3.1 µg/m³
O3
Ground-level ozone
Dominant
31 AQI 34 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sun 31 Good 31 17
Mon 37 Good 37 36
Tue 32 Good 30 32
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 Sat Sep 26, 20:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE16 J/kg
MUCAPE15 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index11.2
Kinematics
0–6 km Shear38 kt
0–1 km Shear31 kt
Eff. Shear—
0–1 km SRH114
0–3 km SRH229
Eff. SRH—
Storm Motion71° @ 16 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index33.3
Thermo & Levels
PWAT1.67 in
0–3 km LR3.2 °C/km
700–500 LR5.6 °C/km
Total Totals45.1
LCL972 hPa
LFC1011 hPa
EL1011 hPa
Freezing Lvl13,028 ft