Lancaster County, Virginia, United States

Last updated: 9:09 PM CDT  ·  Refresh
25°C
Feels like 29°
Mostly Cloudy
▲ 30°  /  ▼ 21°
Wind
6 mph W
Humidity
91%
Dew Point
23°
Pressure
29.88 inHg
Visibility
8 mi
UV Index
0.0
Cloud Cover
63%
Sunrise
6:25 AM
Sunset
7:52 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Lancaster County is currently mostly cloudy at 25°C. Precipitation is likely — peak probability 60% around 11 PM. Atmospheric instability is elevated (CAPE up to 762 J/kg) — isolated convective development possible. Sunrise: 6:25AM · Sunset: 7:52PM.

Alerts

No active alerts for this location.
43 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
58%
11 PM
24°
60%
12 AM
23°
59%
1 AM
23°
45%
2 AM
22°
26%
3 AM
21°
11%
4 AM
21°
8%
5 AM
21°
4%
6 AM
21°
4%
7 AM
21°
5%
8 AM
21°
5%
9 AM
23°
10%
10 AM
23°
10%
11 AM
24°
22%
12 PM
25°
27%
1 PM
26°
31%
2 PM
27°
35%
3 PM
27°
31%
4 PM
27°
43%
5 PM
26°
39%
6 PM
26°
40%
7 PM
25°
40%
8 PM
24°
41%
9 PM
23°
46%
7-Day Forecast
Tonight
30° 21°
Mostly Cloudy with a 58% chance of rain.
Fri
28° 21°
Partly Cloudy with a 47% chance of rain.
Sat
27° 22°
Heavy Rain, 81% chance.
Sun
31° 21°
Partly Cloudy with a 57% chance of rain.
Mon
31° 20°
Clear with a 29% chance of rain.
Tue
29° 19°
Heavy Rain, 82% chance.
Wed
31° 20°
Heavy Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 25° Mostly Cloudy 58% 6 mph W 91%
11 PM 24° Overcast 60% 4 mph NNW 92%
12 AM 23° Mostly Cloudy 59% 5 mph NNW 92%
1 AM 23° Mostly Cloudy 45% 6 mph NNW 92%
2 AM 22° Partly Cloudy 26% 6 mph NNW 92%
3 AM 21° Mostly Cloudy 11% 6 mph NNW 92%
4 AM 21° Mostly Cloudy 8% 6 mph N 92%
5 AM 21° Overcast 4% 7 mph N 93%
6 AM 21° Mostly Cloudy 4% 7 mph N 91%
7 AM 21° Mostly Cloudy 5% 7 mph N 90%
8 AM 21° Mostly Cloudy 5% 7 mph N 87%
9 AM 23° Partly Cloudy 10% 8 mph N 83%
10 AM 23° Partly Cloudy 10% 8 mph N 79%
11 AM 24° Partly Cloudy 22% 8 mph N 75%
12 PM 25° Partly Cloudy 27% 7 mph N 73%
1 PM 26° Partly Cloudy 31% 6 mph N 71%
2 PM 27° Partly Cloudy 35% 6 mph NNE 69%
3 PM 27° Partly Cloudy 31% 5 mph NNE 69%
4 PM 27° Partly Cloudy 43% 5 mph NNE 69%
5 PM 26° Partly Cloudy 39% 5 mph NNE 70%
6 PM 26° Partly Cloudy 40% 5 mph NE 73%
7 PM 25° Mostly Cloudy 40% 5 mph NE 76%
8 PM 24° Mostly Cloudy 41% 6 mph NE 79%
9 PM 23° Overcast 46% 6 mph ENE 79%
15-Day Forecast
Today
8/20
Mostly Cloudy
58%
21°
30°
Fri
8/21
Partly Cloudy
47%
21°
28°
Sat
8/22
Heavy Rain
81%
22°
27°
Sun
8/23
Partly Cloudy
57%
21°
31°
Mon
8/24
Clear
29%
20°
31°
Tue
8/25
Heavy Rain
82%
19°
29°
Wed
8/26
Heavy Rain
82%
20°
31°
Thu
8/27
Rain
82%
21°
31°
Fri
8/28
Drizzle
68%
21°
31°
Sat
8/29
Rain
68%
21°
32°
Sun
8/30
Drizzle
60%
21°
33°
Mon
8/31
Drizzle
60%
22°
32°
Tue
9/1
Drizzle
60%
21°
28°
Wed
9/2
Drizzle
60%
20°
28°
Thu
9/3
Drizzle
60%
20°
28°
43
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
42 AQI 7.6 µg/m³
O3
Ground-level ozone
Dominant
43 AQI 46 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 43 Good 43 42
Sat 32 Good 32 20
Sun 37 Good 37 14
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 Thu Aug 20, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE820 J/kg
MLCAPE882 J/kg
MUCAPE1148 J/kg
SBCIN-34 J/kg
MLCIN-18 J/kg
Lifted Index-2.4
Kinematics
0–6 km Shear29 kt
0–1 km Shear14 kt
Eff. Shear30 kt
0–1 km SRH-9
0–3 km SRH50
Eff. SRH50
Storm Motion283° @ 28 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.2
Supercell0.9
K-Index38.8
Thermo & Levels
PWAT2.33 in
0–3 km LR5.4 °C/km
700–500 LR5.0 °C/km
Total Totals45.4
LCL983 hPa
LFC822 hPa
EL230 hPa
Freezing Lvl15,604 ft