Severe Thunderstorm Watch 9:00 PM

Amherst County, Virginia, United States

Last updated: 7:10 PM CDT  ·  Refresh
29°C
Feels like 31°
Mostly Cloudy
▲ 36°  /  ▼ 20°
Wind
5 mph SSE
Humidity
64%
Dew Point
21°
Pressure
28.78 inHg
Visibility
10 mi
UV Index
1.2
Cloud Cover
68%
Sunrise
6:00 AM
Sunset
8:41 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Amherst County is currently mostly cloudy at 29°C. Precipitation is likely — peak probability 52% around 8 PM. Atmospheric instability is elevated (CAPE up to 1495 J/kg) — isolated convective development possible. Sunrise: 6:00AM · Sunset: 8:41PM.

Alerts

Severe Thunderstorm Watch
Expires 9:00 PM
60 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
29°
52%
9 PM
28°
50%
10 PM
25°
42%
11 PM
24°
41%
12 AM
23°
47%
1 AM
23°
38%
2 AM
22°
20%
3 AM
22°
20%
4 AM
22°
8%
5 AM
21°
6%
6 AM
20°
6%
7 AM
21°
3%
8 AM
22°
3%
9 AM
24°
14%
10 AM
28°
14%
11 AM
29°
31%
12 PM
31°
38%
1 PM
31°
42%
2 PM
34°
45%
3 PM
33°
45%
4 PM
32°
45%
5 PM
31°
45%
6 PM
31°
50%
7 PM
30°
41%
7-Day Forecast
Tonight
36° 20°
Mostly Cloudy with a 52% chance of rain.
Sun
36° 20°
Partly Cloudy with a 45% chance of rain.
Mon
33° 21°
Thunderstorm, 90% chance.
Tue
30° 19°
Partly Cloudy with a 46% chance of rain.
Wed
30° 17°
Mostly Cloudy with a 30% chance of rain.
Thu
31° 19°
Drizzle, 51% chance.
Fri
34° 21°
Partly Cloudy with a 42% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 29° Mostly Cloudy 52% 5 mph SSE 64%
9 PM 28° Mostly Cloudy 50% 3 mph ENE 72%
10 PM 25° Mostly Cloudy 42% 2 mph E 76%
11 PM 24° Mostly Cloudy 41% 3 mph ENE 81%
12 AM 23° Mostly Cloudy 47% 3 mph WSW 84%
1 AM 23° Mostly Cloudy 38% 3 mph W 86%
2 AM 22° Mostly Cloudy 20% 2 mph W 87%
3 AM 22° Partly Cloudy 20% 2 mph WNW 87%
4 AM 22° Partly Cloudy 8% 3 mph W 87%
5 AM 21° Partly Cloudy 6% 3 mph W 86%
6 AM 20° Partly Cloudy 6% 2 mph W 84%
7 AM 21° Mostly Clear 3% 2 mph WNW 82%
8 AM 22° Partly Cloudy 3% 2 mph NW 79%
9 AM 24° Partly Cloudy 14% 2 mph W 72%
10 AM 28° Partly Cloudy 14% 2 mph SW 64%
11 AM 29° Partly Cloudy 31% 2 mph SSW 57%
12 PM 31° Partly Cloudy 38% 3 mph SSW 52%
1 PM 31° Partly Cloudy 42% 4 mph SSW 48%
2 PM 34° Partly Cloudy 45% 5 mph SSW 46%
3 PM 33° Partly Cloudy 45% 4 mph SW 50%
4 PM 32° Partly Cloudy 45% 5 mph SW 53%
5 PM 31° Partly Cloudy 45% 6 mph WSW 57%
6 PM 31° Partly Cloudy 50% 5 mph WSW 60%
7 PM 30° Partly Cloudy 41% 4 mph WSW 63%
15-Day Forecast
Today
7/4
Mostly Cloudy
52%
20°
36°
Sun
7/5
Partly Cloudy
45%
20°
36°
Mon
7/6
Thunderstorm
90%
21°
33°
Tue
7/7
Partly Cloudy
46%
19°
30°
Wed
7/8
Mostly Cloudy
30%
17°
30°
Thu
7/9
Drizzle
51%
19°
31°
Fri
7/10
Partly Cloudy
42%
21°
34°
Sat
7/11
Rain
63%
19°
31°
Sun
7/12
Rain
68%
17°
29°
Mon
7/13
Drizzle
51%
17°
31°
Tue
7/14
Drizzle
60%
18°
33°
Wed
7/15
Drizzle
60%
18°
32°
Thu
7/16
Drizzle
60%
18°
32°
Fri
7/17
Rain
90%
18°
31°
Sat
7/18
Drizzle
60%
18°
32°
60
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
60 AQI 13.9 µg/m³
O3
Ground-level ozone
40 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 60 Moderate 40 60
Mon 52 Moderate 35 52
Tue 41 Good 29 41
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 Sat Jul 4, 22:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1569 J/kg
MLCAPE1639 J/kg
MUCAPE1719 J/kg
SBCIN-254 J/kg
MLCIN0 J/kg
Lifted Index-6.2
Kinematics
0–6 km Shear12 kt
0–1 km Shear15 kt
Eff. Shear11 kt
0–1 km SRH-88
0–3 km SRH-95
Eff. SRH-43
Storm Motion158° @ 19 kt
0–1 km EHI-0.9
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index43.3
Thermo & Levels
PWAT1.90 in
0–3 km LR6.8 °C/km
700–500 LR6.7 °C/km
Total Totals55.6
LCL865 hPa
LFC730 hPa
EL187 hPa
Freezing Lvl13,110 ft