Tornado Watch 8:00 PM

Litchfield County, Northwest Hills Planning Region, Connecticut, United States

Last updated: 6:22 PM CDT  ·  Refresh
21°C
Feels like 23°
Rain
▲ 23°  /  ▼ 16°
Wind
6 mph S
Humidity
99%
Dew Point
21°
Pressure
28.65 inHg
Visibility
1 mi
UV Index
0.8
Cloud Cover
97%
Sunrise
5:36 AM
Sunset
8:21 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Litchfield County is currently rain at 21°C. Precipitation is likely — peak probability 85% around 7 PM. Atmospheric instability is elevated (CAPE up to 1251 J/kg) — isolated convective development possible. Sunrise: 5:36AM · Sunset: 8:21PM.

Alerts

Tornado Watch
Expires 8:00 PM
72 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
21°
84%
8 PM
22°
83%
9 PM
21°
76%
10 PM
21°
75%
11 PM
21°
68%
12 AM
21°
66%
1 AM
20°
54%
2 AM
20°
35%
3 AM
20°
35%
4 AM
20°
21%
5 AM
18°
26%
6 AM
19°
40%
7 AM
19°
23%
8 AM
19°
29%
9 AM
21°
36%
10 AM
22°
42%
11 AM
22°
42%
12 PM
23°
43%
1 PM
24°
32%
2 PM
25°
29%
3 PM
24°
36%
4 PM
24°
36%
5 PM
26°
37%
6 PM
24°
41%
7-Day Forecast
Tonight
23° 16°
Rain, 84% chance.
Wed
27° 16°
Rain, 54% chance.
Thu
26° 12°
Mostly Clear.
Fri
25° 13°
Mostly Clear.
Sat
27° 13°
Clear.
Sun
27° 14°
Rain, 74% chance.
Mon
26° 16°
Drizzle, 67% chance.
TimeTempConditionsPrecipWindHumidity
Now 21° Rain 84% 6 mph S 99%
8 PM 22° Haze 83% 7 mph SSW 99%
9 PM 21° Haze 76% 8 mph SSW 99%
10 PM 21° Overcast 75% 8 mph SSW 99%
11 PM 21° Rain 68% 9 mph SSW 98%
12 AM 21° Overcast 66% 10 mph SSW 98%
1 AM 20° Overcast 54% 9 mph SSW 98%
2 AM 20° Rain 35% 9 mph SSW 98%
3 AM 20° Haze 35% 9 mph SW 97%
4 AM 20° Overcast 21% 9 mph SW 97%
5 AM 18° Overcast 26% 8 mph SW 97%
6 AM 19° Mostly Cloudy 40% 8 mph SW 96%
7 AM 19° Mostly Cloudy 23% 9 mph SW 93%
8 AM 19° Mostly Cloudy 29% 9 mph SW 90%
9 AM 21° Drizzle 36% 8 mph WSW 86%
10 AM 22° Rain 42% 8 mph WSW 82%
11 AM 22° Rain 42% 8 mph WSW 78%
12 PM 23° Partly Cloudy 43% 9 mph WSW 72%
1 PM 24° Partly Cloudy 32% 9 mph WSW 67%
2 PM 25° Partly Cloudy 29% 10 mph WSW 63%
3 PM 24° Partly Cloudy 36% 10 mph W 61%
4 PM 24° Partly Cloudy 36% 10 mph W 59%
5 PM 26° Partly Cloudy 37% 10 mph W 59%
6 PM 24° Mostly Clear 41% 9 mph WNW 61%
15-Day Forecast
Today
7/21
Rain
84%
16°
23°
Wed
7/22
Rain
54%
16°
27°
Thu
7/23
Mostly Clear
3%
12°
26°
Fri
7/24
Mostly Clear
3%
13°
25°
Sat
7/25
Clear
8%
13°
27°
Sun
7/26
Rain
74%
14°
27°
Mon
7/27
Drizzle
67%
16°
26°
Tue
7/28
Drizzle
63%
14°
25°
Wed
7/29
Drizzle
68%
14°
24°
Thu
7/30
Drizzle
68%
14°
25°
Fri
7/31
Drizzle
64%
16°
27°
Sat
8/1
Drizzle
60%
16°
26°
Sun
8/2
Drizzle
60%
16°
26°
Mon
8/3
Drizzle
60%
17°
26°
Tue
8/4
Drizzle
60%
17°
27°
72
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
72 AQI 20.6 µg/m³
O3
Ground-level ozone
44 AQI 48 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 72 Moderate 44 72
Thu 35 Good 35 33
Fri 48 Good 33 48
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, 22:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE484 J/kg
MLCAPE503 J/kg
MUCAPE544 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-2.4
Kinematics
0–6 km Shear36 kt
0–1 km Shear18 kt
Eff. Shear39 kt
0–1 km SRH-61
0–3 km SRH-121
Eff. SRH-121
Storm Motion203° @ 37 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index37.4
Thermo & Levels
PWAT1.97 in
0–3 km LR5.5 °C/km
700–500 LR5.1 °C/km
Total Totals47.2
LCL964 hPa
LFC970 hPa
EL332 hPa
Freezing Lvl13,087 ft