Areal Flood Warning — Franklin County, MA, Hampden County, MA, Hampshire County, MA, Worcester County, MA 7:00 PM Areal Flood Watch 7:00 PM Flash Flood Warning — Hartford County, CT, Tolland County, CT, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Worcester County, MA 8:00 PM

Hampden County, Massachusetts, United States

Last updated: 5:17 PM CDT  ·  Refresh
21°C
Feels like 22°
Mostly Cloudy
▲ 22°  /  ▼ 16°
Wind
7 mph SE
Humidity
89%
Dew Point
20°
Pressure
29.42 inHg
Visibility
9 mi
UV Index
3.4
Cloud Cover
68%
Sunrise
5:40 AM
Sunset
8:12 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Hampden County is currently mostly cloudy at 21°C. Precipitation is likely — peak probability 75% around 8 AM. Atmospheric instability is elevated (CAPE up to 582 J/kg) — isolated convective development possible. Sunrise: 5:40AM · Sunset: 8:12PM.

Alerts

Areal Flood Warning
Franklin County, MA, Hampden County, MA, Hampshire County, MA, Worcester County, MA
Expires 7:00 PM
Areal Flood Watch
Expires 7:00 PM
Flash Flood Warning
Hartford County, CT, Tolland County, CT, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Worcester County, MA
Expires 8:00 PM
31 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
21°
70%
7 PM
22°
57%
8 PM
22°
72%
9 PM
20°
56%
10 PM
20°
54%
11 PM
19°
55%
12 AM
19°
56%
1 AM
19°
61%
2 AM
18°
58%
3 AM
18°
64%
4 AM
18°
65%
5 AM
16°
65%
6 AM
17°
68%
7 AM
17°
63%
8 AM
17°
74%
9 AM
17°
70%
10 AM
17°
74%
11 AM
18°
74%
12 PM
18°
67%
1 PM
21°
68%
2 PM
21°
64%
3 PM
21°
64%
4 PM
21°
60%
5 PM
23°
40%
7-Day Forecast
Tonight
22° 16°
Mostly Cloudy with a 70% chance of rain.
Thu
24° 16°
Mostly Cloudy with a 70% chance of rain.
Fri
28° 17°
Partly Cloudy with a 54% chance of rain.
Sat
31° 18°
Mostly Cloudy with a 61% chance of rain.
Sun
29° 19°
Drizzle, 67% chance.
Mon
29° 17°
Drizzle, 82% chance.
Tue
31° 17°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 21° Mostly Cloudy 70% 7 mph SE 89%
7 PM 22° Partly Cloudy 57% 6 mph SE 89%
8 PM 22° Partly Cloudy 72% 4 mph SE 90%
9 PM 20° Mostly Cloudy 56% 4 mph ESE 92%
10 PM 20° Mostly Cloudy 54% 4 mph E 94%
11 PM 19° Mostly Cloudy 55% 4 mph NE 94%
12 AM 19° Mostly Cloudy 56% 4 mph NE 95%
1 AM 19° Mostly Cloudy 61% 4 mph NNE 96%
2 AM 18° Mostly Cloudy 58% 5 mph N 96%
3 AM 18° Mostly Cloudy 64% 5 mph N 97%
4 AM 18° Mostly Cloudy 65% 5 mph N 98%
5 AM 16° Mostly Cloudy 65% 6 mph N 98%
6 AM 17° Mostly Cloudy 68% 6 mph N 96%
7 AM 17° Overcast 63% 6 mph N 94%
8 AM 17° Overcast 74% 6 mph N 93%
9 AM 17° Overcast 70% 7 mph N 94%
10 AM 17° Rain 74% 7 mph N 94%
11 AM 18° Rain 74% 8 mph N 93%
12 PM 18° Rain 67% 8 mph N 90%
1 PM 21° Overcast 68% 8 mph N 87%
2 PM 21° Mostly Cloudy 64% 8 mph N 84%
3 PM 21° Mostly Cloudy 64% 7 mph N 83%
4 PM 21° Mostly Cloudy 60% 7 mph N 82%
5 PM 23° Mostly Cloudy 40% 6 mph NNW 82%
15-Day Forecast
Today
7/29
Mostly Cloudy
70%
16°
22°
Thu
7/30
Mostly Cloudy
70%
16°
24°
Fri
7/31
Partly Cloudy
54%
17°
28°
Sat
8/1
Mostly Cloudy
61%
18°
31°
Sun
8/2
Drizzle
67%
19°
29°
Mon
8/3
Drizzle
82%
17°
29°
Tue
8/4
Clear
17%
17°
31°
Wed
8/5
Partly Cloudy
17%
17°
32°
Thu
8/6
Drizzle
43%
19°
32°
Fri
8/7
Drizzle
50%
19°
32°
Sat
8/8
Drizzle
54%
19°
31°
Sun
8/9
Drizzle
60%
18°
31°
Mon
8/10
Drizzle
60%
17°
30°
Tue
8/11
Drizzle
60%
16°
29°
Wed
8/12
Drizzle
60%
16°
28°
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
21 AQI 3.7 µg/m³
O3
Ground-level ozone
Dominant
31 AQI 35 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 31 Good 31 21
Fri 27 Good 27 19
Sat 45 Good 35 45
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 Wed Jul 29, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE718 J/kg
MLCAPE328 J/kg
MUCAPE718 J/kg
SBCIN-11 J/kg
MLCIN0 J/kg
Lifted Index-2.5
Kinematics
0–6 km Shear19 kt
0–1 km Shear13 kt
Eff. Shear20 kt
0–1 km SRH-36
0–3 km SRH-46
Eff. SRH-46
Storm Motion170° @ 25 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index33.4
Thermo & Levels
PWAT1.59 in
0–3 km LR5.8 °C/km
700–500 LR5.5 °C/km
Total Totals46.0
LCL973 hPa
LFC931 hPa
EL276 hPa
Freezing Lvl12,283 ft