Marine Warning — Chesapeake Bay from Smith Point to Windmill Point VA, AN, Chesapeake Bay from Windmill Point to New Point Comfort VA, AN, Rappahannock River from Urbanna to Windmill Point, AN 2:00 AM Flash Flood Warning — Essex County, VA, King and Queen County, VA, King William County, VA, Lancaster County, VA, Northumberland County, VA, Richmond County, VA 2:15 AM Areal Flood Advisory — Chesterfield County, VA, Essex County, VA, Gloucester County, VA, Hanover County, VA, Henrico County, VA, King and Queen County, VA, King William County, VA, Lancaster County, VA, Middlesex County, VA, New Kent County, VA, Northumberland County, VA, City of Richmond County, VA 3:45 AM Areal Flood Watch 11:00 PM

Lancaster County, Virginia, United States

Last updated: 1:04 AM CDT  ·  Refresh
23°C
Feels like 27°
Mostly Cloudy
▲ 31°  /  ▼ 19°
Wind
5 mph SW
Humidity
98%
Dew Point
23°
Pressure
29.72 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
76%
Sunrise
6:01 AM
Sunset
8:22 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Lancaster County is currently mostly cloudy at 23°C. Precipitation is likely — peak probability 90% around 2 AM. Atmospheric instability is elevated (CAPE up to 1645 J/kg) — isolated convective development possible. Sunrise: 6:01AM · Sunset: 8:22PM.

Alerts

Marine Warning
Chesapeake Bay from Smith Point to Windmill Point VA, AN, Chesapeake Bay from Windmill Point to New Point Comfort VA, AN, Rappahannock River from Urbanna to Windmill Point, AN
Expires 2:00 AM
Flash Flood Warning
Essex County, VA, King and Queen County, VA, King William County, VA, Lancaster County, VA, Northumberland County, VA, Richmond County, VA
Expires 2:15 AM
Areal Flood Advisory
Chesterfield County, VA, Essex County, VA, Gloucester County, VA, Hanover County, VA, Henrico County, VA, King and Queen County, VA, King William County, VA, Lancaster County, VA, Middlesex County, VA, New Kent County, VA, Northumberland County, VA, City of Richmond County, VA
Expires 3:45 AM
Areal Flood Watch
Expires 11:00 PM
33 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
90%
3 AM
23°
90%
4 AM
23°
84%
5 AM
23°
46%
6 AM
23°
47%
7 AM
23°
43%
8 AM
24°
53%
9 AM
25°
46%
10 AM
27°
47%
11 AM
27°
64%
12 PM
28°
61%
1 PM
28°
74%
2 PM
30°
61%
3 PM
29°
74%
4 PM
29°
73%
5 PM
28°
72%
6 PM
27°
76%
7 PM
26°
74%
8 PM
25°
77%
9 PM
26°
86%
10 PM
25°
90%
11 PM
25°
90%
12 AM
24°
90%
1 AM
23°
90%
7-Day Forecast
Today
31° 19°
Mostly Cloudy with a 90% chance of rain.
Thu
27° 19°
Partly Cloudy with a 86% chance of rain.
Fri
28° 19°
Mostly Clear with a 59% chance of rain.
Sat
28° 20°
Overcast with a 45% chance of rain.
Sun
31° 20°
Rain, 90% chance.
Mon
34° 21°
Rain, 71% chance.
Tue
34° 21°
Rain, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 23° Mostly Cloudy 90% 5 mph SW 98%
3 AM 23° Mostly Cloudy 90% 5 mph SW 97%
4 AM 23° Mostly Cloudy 84% 7 mph SW 96%
5 AM 23° Mostly Cloudy 46% 10 mph SSW 95%
6 AM 23° Mostly Cloudy 47% 10 mph SW 93%
7 AM 23° Mostly Cloudy 43% 12 mph SW 92%
8 AM 24° Mostly Cloudy 53% 12 mph SW 90%
9 AM 25° Mostly Cloudy 46% 12 mph SW 85%
10 AM 27° Mostly Cloudy 47% 13 mph SW 80%
11 AM 27° Rain 64% 12 mph SW 75%
12 PM 28° Mostly Cloudy 61% 12 mph SW 72%
1 PM 28° Mostly Cloudy 74% 12 mph SW 68%
2 PM 30° Heavy Rain 61% 12 mph SW 65%
3 PM 29° Mostly Cloudy 74% 11 mph SW 67%
4 PM 29° Partly Cloudy 73% 12 mph SW 70%
5 PM 28° Partly Cloudy 72% 12 mph SSW 73%
6 PM 27° Partly Cloudy 76% 10 mph SW 77%
7 PM 26° Partly Cloudy 74% 9 mph SW 81%
8 PM 25° Partly Cloudy 77% 7 mph SW 85%
9 PM 26° Partly Cloudy 86% 7 mph SW 86%
10 PM 25° Heavy Rain 90% 6 mph SW 88%
11 PM 25° Heavy Rain 90% 5 mph SW 89%
12 AM 24° Heavy Rain 90% 6 mph SW 92%
1 AM 23° Rain 90% 5 mph W 94%
15-Day Forecast
Today
7/22
Mostly Cloudy
90%
19°
31°
Thu
7/23
Partly Cloudy
86%
19°
27°
Fri
7/24
Mostly Clear
59%
19°
28°
Sat
7/25
Overcast
45%
20°
28°
Sun
7/26
Rain
90%
20°
31°
Mon
7/27
Rain
71%
21°
34°
Tue
7/28
Rain
71%
21°
34°
Wed
7/29
Rain
69%
20°
34°
Thu
7/30
Drizzle
44%
19°
30°
Fri
7/31
Rain
68%
19°
29°
Sat
8/1
Drizzle
60%
20°
28°
Sun
8/2
Drizzle
60%
21°
28°
Mon
8/3
Drizzle
60%
21°
30°
Tue
8/4
Drizzle
60%
22°
31°
Wed
8/5
Drizzle
60%
22°
30°
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
28 AQI 5.1 µg/m³
O3
Ground-level ozone
Dominant
33 AQI 37 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 33 Good 33 28
Thu 40 Good 40 38
Fri 30 Good 30 26
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 22, 04:00'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
SBCAPE532 J/kg
MLCAPE827 J/kg
MUCAPE1054 J/kg
SBCIN-41 J/kg
MLCIN0 J/kg
Lifted Index-2.1
Kinematics
0–6 km Shear46 kt
0–1 km Shear26 kt
Eff. Shear46 kt
0–1 km SRH-93
0–3 km SRH-115
Eff. SRH-115
Storm Motion220° @ 41 kt
0–1 km EHI-0.3
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.1
Thermo & Levels
PWAT2.44 in
0–3 km LR4.7 °C/km
700–500 LR5.4 °C/km
Total Totals47.2
LCL997 hPa
LFC813 hPa
EL223 hPa
Freezing Lvl15,551 ft