Severe Thunderstorm Watch 12:00 AM Areal Flood Watch 7:00 AM

Roanoke County, Virginia, United States

Last updated: 11:49 PM CDT  ·  Refresh
23°C
Feels like 25°
Mostly Cloudy
▲ 29°  /  ▼ 18°
Wind
8 mph WSW
Humidity
91%
Dew Point
21°
Pressure
28.02 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
76%
Sunrise
6:17 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 76% around 3 AM. Atmospheric instability is elevated (CAPE up to 914 J/kg) — isolated convective development possible. Sunrise: 6:17AM · Sunset: 8:36PM.

Alerts

Severe Thunderstorm Watch
Expires 12:00 AM
Areal Flood Watch
Expires 7:00 AM
53 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
47%
1 AM
23°
59%
2 AM
22°
74%
3 AM
22°
76%
4 AM
22°
69%
5 AM
20°
45%
6 AM
21°
50%
7 AM
21°
32%
8 AM
22°
33%
9 AM
23°
33%
10 AM
24°
40%
11 AM
24°
41%
12 PM
26°
42%
1 PM
27°
52%
2 PM
27°
43%
3 PM
27°
52%
4 PM
27°
56%
5 PM
27°
47%
6 PM
26°
42%
7 PM
25°
33%
8 PM
24°
34%
9 PM
23°
38%
10 PM
23°
39%
11 PM
23°
39%
7-Day Forecast
Today
29° 18°
Partly Cloudy with a 76% chance of rain.
Thu
25° 16°
Partly Cloudy with a 43% chance of rain.
Fri
26° 16°
Mostly Cloudy with a 72% chance of rain.
Sat
22° 17°
Rain, 67% chance.
Sun
31° 17°
Rain, 82% chance.
Mon
33° 19°
Rain, 64% chance.
Tue
35° 18°
Rain, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 23° Mostly Cloudy 47% 8 mph WSW 91%
1 AM 23° Partly Cloudy 59% 10 mph WSW 93%
2 AM 22° Rain 74% 10 mph W 92%
3 AM 22° Rain 76% 10 mph WSW 91%
4 AM 22° Rain 69% 9 mph W 91%
5 AM 20° Rain 45% 7 mph WSW 91%
6 AM 21° Partly Cloudy 50% 6 mph WSW 91%
7 AM 21° Mostly Cloudy 32% 6 mph WSW 91%
8 AM 22° Mostly Cloudy 33% 6 mph WSW 85%
9 AM 23° Mostly Cloudy 33% 7 mph W 76%
10 AM 24° Mostly Cloudy 40% 7 mph W 68%
11 AM 24° Mostly Cloudy 41% 6 mph W 64%
12 PM 26° Mostly Cloudy 42% 6 mph WSW 60%
1 PM 27° Partly Cloudy 52% 6 mph WSW 55%
2 PM 27° Partly Cloudy 43% 6 mph WSW 56%
3 PM 27° Partly Cloudy 52% 5 mph WSW 58%
4 PM 27° Rain 56% 6 mph SW 61%
5 PM 27° Partly Cloudy 47% 5 mph WSW 67%
6 PM 26° Mostly Cloudy 42% 4 mph W 73%
7 PM 25° Mostly Cloudy 33% 5 mph WNW 77%
8 PM 24° Mostly Cloudy 34% 5 mph WNW 79%
9 PM 23° Partly Cloudy 38% 5 mph W 81%
10 PM 23° Partly Cloudy 39% 4 mph W 83%
11 PM 23° Partly Cloudy 39% 4 mph W 82%
15-Day Forecast
Today
7/22
Partly Cloudy
76%
18°
29°
Thu
7/23
Partly Cloudy
43%
16°
25°
Fri
7/24
Mostly Cloudy
72%
16°
26°
Sat
7/25
Rain
67%
17°
22°
Sun
7/26
Rain
82%
17°
31°
Mon
7/27
Rain
64%
19°
33°
Tue
7/28
Rain
63%
18°
35°
Wed
7/29
Rain
69%
16°
31°
Thu
7/30
Rain
66%
16°
29°
Fri
7/31
Drizzle
51%
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°
Wed
8/5
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, 03:00'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
SBCAPE887 J/kg
MLCAPE859 J/kg
MUCAPE927 J/kg
SBCIN-53 J/kg
MLCIN0 J/kg
Lifted Index-3.2
Kinematics
0–6 km Shear37 kt
0–1 km Shear29 kt
Eff. Shear37 kt
0–1 km SRH-38
0–3 km SRH-46
Eff. SRH-46
Storm Motion235° @ 39 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index34.3
Thermo & Levels
PWAT1.88 in
0–3 km LR5.1 °C/km
700–500 LR5.9 °C/km
Total Totals47.5
LCL923 hPa
LFC781 hPa
EL194 hPa
Freezing Lvl13,615 ft