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

Hartford County, Capitol Planning Region, Connecticut, United States

Last updated: 7:25 PM CDT  ·  Refresh
21°C
Feels like 22°
Heavy Rain
▲ 22°  /  ▼ 17°
Wind
5 mph ESE
Humidity
88%
Dew Point
19°
Pressure
29.41 inHg
Visibility
8 mi
UV Index
0.0
Cloud Cover
63%
Sunrise
5:42 AM
Sunset
8:12 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Hartford County is currently heavy rain at 21°C. Precipitation is likely — peak probability 76% around 10 AM. Atmospheric instability is elevated (CAPE up to 628 J/kg) — isolated convective development possible. Sunrise: 5:42AM · Sunset: 8:12PM.

Alerts

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
33 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
21°
72%
9 PM
21°
73%
10 PM
20°
54%
11 PM
20°
54%
12 AM
19°
54%
1 AM
19°
59%
2 AM
19°
55%
3 AM
18°
69%
4 AM
18°
58%
5 AM
17°
63%
6 AM
17°
73%
7 AM
17°
73%
8 AM
18°
74%
9 AM
18°
74%
10 AM
18°
76%
11 AM
18°
59%
12 PM
18°
63%
1 PM
21°
58%
2 PM
21°
55%
3 PM
21°
50%
4 PM
21°
48%
5 PM
23°
45%
6 PM
23°
45%
7 PM
23°
32%
7-Day Forecast
Tonight
22° 17°
Heavy Rain, 72% chance.
Thu
23° 17°
Mostly Cloudy with a 74% chance of rain.
Fri
28° 17°
Mostly Clear with a 52% chance of rain.
Sat
31° 18°
Mostly Cloudy with a 52% chance of rain.
Sun
30° 19°
Drizzle, 70% chance.
Mon
28° 17°
Rain, 80% chance.
Tue
31° 17°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 21° Heavy Rain 72% 5 mph ESE 88%
9 PM 21° Partly Cloudy 73% 5 mph ESE 90%
10 PM 20° Mostly Cloudy 54% 5 mph E 92%
11 PM 20° Mostly Cloudy 54% 5 mph ENE 94%
12 AM 19° Mostly Cloudy 54% 4 mph NE 94%
1 AM 19° Mostly Cloudy 59% 4 mph NNE 95%
2 AM 19° Mostly Cloudy 55% 5 mph NNE 96%
3 AM 18° Mostly Cloudy 69% 5 mph N 96%
4 AM 18° Mostly Cloudy 58% 6 mph N 97%
5 AM 17° Mostly Cloudy 63% 6 mph N 96%
6 AM 17° Mostly Cloudy 73% 6 mph N 95%
7 AM 17° Rain 73% 6 mph N 93%
8 AM 18° Mostly Cloudy 74% 6 mph N 92%
9 AM 18° Mostly Cloudy 74% 7 mph N 92%
10 AM 18° Overcast 76% 7 mph N 92%
11 AM 18° Overcast 59% 8 mph N 91%
12 PM 18° Mostly Cloudy 63% 8 mph N 90%
1 PM 21° Mostly Cloudy 58% 8 mph N 88%
2 PM 21° Mostly Cloudy 55% 8 mph N 87%
3 PM 21° Partly Cloudy 50% 8 mph N 87%
4 PM 21° Partly Cloudy 48% 7 mph N 87%
5 PM 23° Partly Cloudy 45% 7 mph NNW 87%
6 PM 23° Partly Cloudy 45% 6 mph NNW 87%
7 PM 23° Partly Cloudy 32% 6 mph NNW 87%
15-Day Forecast
Today
7/29
Heavy Rain
72%
17°
22°
Thu
7/30
Mostly Cloudy
74%
17°
23°
Fri
7/31
Mostly Clear
52%
17°
28°
Sat
8/1
Mostly Cloudy
52%
18°
31°
Sun
8/2
Drizzle
70%
19°
30°
Mon
8/3
Rain
80%
17°
28°
Tue
8/4
Clear
15%
17°
31°
Wed
8/5
Partly Cloudy
16%
18°
33°
Thu
8/6
Drizzle
35%
20°
32°
Fri
8/7
Thunderstorm
56%
21°
33°
Sat
8/8
Drizzle
60%
19°
33°
Sun
8/9
Drizzle
60%
19°
33°
Mon
8/10
Drizzle
60%
17°
31°
Tue
8/11
Drizzle
60%
17°
29°
Wed
8/12
Drizzle
60%
16°
29°
33
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
30 AQI 5.5 µg/m³
O3
Ground-level ozone
Dominant
33 AQI 37 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 33 Good 33 30
Fri 27 Good 27 23
Sat 42 Good 35 42
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, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE537 J/kg
MLCAPE693 J/kg
MUCAPE899 J/kg
SBCIN-12 J/kg
MLCIN0 J/kg
Lifted Index-2.5
Kinematics
0–6 km Shear16 kt
0–1 km Shear9 kt
Eff. Shear17 kt
0–1 km SRH21
0–3 km SRH-36
Eff. SRH-36
Storm Motion157° @ 20 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index35.4
Thermo & Levels
PWAT1.65 in
0–3 km LR5.4 °C/km
700–500 LR6.1 °C/km
Total Totals49.0
LCL971 hPa
LFC882 hPa
EL274 hPa
Freezing Lvl12,684 ft