Severe Thunderstorm Watch 11:00 PM Areal Flood Watch 7:00 AM

Roanoke County, Virginia, United States

Last updated: 10:34 PM CDT  ·  Refresh
23°C
Feels like 26°
Mostly Cloudy
▲ 28°  /  ▼ 20°
Wind
6 mph WSW
Humidity
90%
Dew Point
22°
Pressure
28.02 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
84%
Sunrise
6:16 AM
Sunset
8:36 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Roanoke County is currently mostly cloudy at 23°C. Precipitation is likely — peak probability 77% around 12 AM. Atmospheric instability is elevated (CAPE up to 1116 J/kg) — isolated convective development possible. Sunrise: 6:16AM · Sunset: 8:36PM.

Alerts

Severe Thunderstorm Watch
Expires 11:00 PM
Areal Flood Watch
Expires 7:00 AM
53 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
69%
12 AM
23°
77%
1 AM
23°
59%
2 AM
22°
74%
3 AM
22°
76%
4 AM
22°
69%
5 AM
20°
47%
6 AM
20°
47%
7 AM
21°
33%
8 AM
22°
33%
9 AM
23°
24%
10 AM
24°
27%
11 AM
25°
42%
12 PM
26°
40%
1 PM
27°
40%
2 PM
28°
43%
3 PM
28°
52%
4 PM
27°
56%
5 PM
28°
47%
6 PM
27°
43%
7 PM
26°
39%
8 PM
25°
34%
9 PM
24°
39%
10 PM
23°
39%
7-Day Forecast
Tonight
28° 20°
Mostly Cloudy with a 69% chance of rain.
Wed
28° 20°
Rain, 74% chance.
Thu
25° 16°
Partly Cloudy with a 25% chance of rain.
Fri
26° 15°
Partly Cloudy with a 72% chance of rain.
Sat
22° 17°
Drizzle, 67% chance.
Sun
31° 17°
Rain, 82% chance.
Mon
33° 19°
Rain, 64% chance.
TimeTempConditionsPrecipWindHumidity
Now 23° Mostly Cloudy 69% 6 mph WSW 90%
12 AM 23° Overcast 77% 9 mph WSW 93%
1 AM 23° Mostly Cloudy 59% 10 mph WSW 93%
2 AM 22° Mostly Cloudy 74% 9 mph WSW 92%
3 AM 22° Mostly Cloudy 76% 9 mph WSW 91%
4 AM 22° Rain 69% 9 mph WSW 90%
5 AM 20° Rain 47% 9 mph WSW 90%
6 AM 20° Partly Cloudy 47% 8 mph WSW 91%
7 AM 21° Partly Cloudy 33% 7 mph WSW 91%
8 AM 22° Mostly Cloudy 33% 6 mph WSW 87%
9 AM 23° Mostly Cloudy 24% 6 mph W 78%
10 AM 24° Mostly Cloudy 27% 7 mph W 70%
11 AM 25° Mostly Cloudy 42% 7 mph W 65%
12 PM 26° Mostly Cloudy 40% 7 mph W 60%
1 PM 27° Partly Cloudy 40% 7 mph W 56%
2 PM 28° Partly Cloudy 43% 6 mph WSW 55%
3 PM 28° Partly Cloudy 52% 6 mph WSW 57%
4 PM 27° Rain 56% 6 mph WSW 60%
5 PM 28° Rain 47% 5 mph WSW 66%
6 PM 27° Partly Cloudy 43% 5 mph W 72%
7 PM 26° Partly Cloudy 39% 5 mph WNW 76%
8 PM 25° Partly Cloudy 34% 5 mph WNW 79%
9 PM 24° Partly Cloudy 39% 5 mph WNW 81%
10 PM 23° Partly Cloudy 39% 5 mph W 82%
15-Day Forecast
Today
7/21
Mostly Cloudy
69%
20°
28°
Wed
7/22
Rain
74%
20°
28°
Thu
7/23
Partly Cloudy
25%
16°
25°
Fri
7/24
Partly Cloudy
72%
15°
26°
Sat
7/25
Drizzle
67%
17°
22°
Sun
7/26
Rain
82%
17°
31°
Mon
7/27
Rain
64%
19°
33°
Tue
7/28
Rain
63%
18°
34°
Wed
7/29
Drizzle
69%
17°
30°
Thu
7/30
Rain
66%
16°
29°
Fri
7/31
Drizzle
60%
16°
31°
Sat
8/1
Drizzle
60%
16°
30°
Sun
8/2
Drizzle
60%
17°
28°
Mon
8/3
Drizzle
60%
17°
29°
Tue
8/4
Drizzle
60%
18°
31°
53
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
53 AQI 10.4 µg/m³
O3
Ground-level ozone
37 AQI 41 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 53 Moderate 37 53
Thu 55 Moderate 40 55
Fri 48 Good 27 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 Wed Jul 22, 02:00'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
SBCAPE1174 J/kg
MLCAPE1059 J/kg
MUCAPE1174 J/kg
SBCIN-25 J/kg
MLCIN0 J/kg
Lifted Index-3.1
Kinematics
0–6 km Shear39 kt
0–1 km Shear30 kt
Eff. Shear40 kt
0–1 km SRH-18
0–3 km SRH-22
Eff. SRH-22
Storm Motion235° @ 40 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.8
Thermo & Levels
PWAT2.09 in
0–3 km LR5.2 °C/km
700–500 LR5.6 °C/km
Total Totals46.7
LCL922 hPa
LFC811 hPa
EL168 hPa
Freezing Lvl14,032 ft