Areal Flood Watch 7:00 AM

Grayson County, Virginia, United States

Last updated: 2:23 AM CDT  ·  Refresh
21°C
Feels like 20°
Mostly Cloudy
▲ 26°  /  ▼ 17°
Wind
10 mph WSW
Humidity
90%
Dew Point
19°
Pressure
26.53 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
80%
Sunrise
6:23 AM
Sunset
8:39 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Grayson County is currently mostly cloudy at 20°C. Precipitation is likely — peak probability 90% around 5 AM. Atmospheric instability is elevated (CAPE up to 835 J/kg) — isolated convective development possible. Sunrise: 6:23AM · Sunset: 8:39PM.

Alerts

Areal Flood Watch
Expires 7:00 AM
34 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
21°
82%
4 AM
21°
84%
5 AM
21°
90%
6 AM
19°
90%
7 AM
19°
71%
8 AM
19°
75%
9 AM
20°
76%
10 AM
21°
70%
11 AM
21°
72%
12 PM
21°
72%
1 PM
21°
76%
2 PM
23°
85%
3 PM
23°
85%
4 PM
24°
82%
5 PM
24°
74%
6 PM
24°
62%
7 PM
23°
66%
8 PM
22°
60%
9 PM
22°
61%
10 PM
20°
61%
11 PM
20°
58%
12 AM
19°
58%
1 AM
19°
58%
2 AM
19°
58%
7-Day Forecast
Today
26° 17°
Mostly Cloudy with a 90% chance of rain.
Thu
25° 16°
Partly Cloudy with a 59% chance of rain.
Fri
23° 16°
Mostly Cloudy with a 50% chance of rain.
Sat
24° 17°
Overcast with a 83% chance of rain.
Sun
29° 17°
Rain, 64% chance.
Mon
32° 19°
Rain, 70% chance.
Tue
33° 18°
Rain, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 21° Mostly Cloudy 82% 10 mph WSW 90%
4 AM 21° Rain 84% 10 mph WSW 93%
5 AM 21° Mostly Cloudy 90% 10 mph WSW 94%
6 AM 19° Mostly Cloudy 90% 8 mph WSW 94%
7 AM 19° Rain 71% 7 mph WSW 94%
8 AM 19° Rain 75% 6 mph WSW 94%
9 AM 20° Overcast 76% 6 mph WSW 93%
10 AM 21° Rain 70% 7 mph WSW 92%
11 AM 21° Rain 72% 6 mph WSW 90%
12 PM 21° Thunderstorm 72% 6 mph WSW 87%
1 PM 21° Thunderstorm 76% 7 mph WSW 84%
2 PM 23° Rain 85% 8 mph W 81%
3 PM 23° Mostly Cloudy 85% 8 mph W 79%
4 PM 24° Mostly Cloudy 82% 8 mph W 76%
5 PM 24° Mostly Cloudy 74% 8 mph W 74%
6 PM 24° Mostly Cloudy 62% 7 mph W 80%
7 PM 23° Mostly Cloudy 66% 6 mph W 86%
8 PM 22° Mostly Cloudy 60% 5 mph W 90%
9 PM 22° Mostly Cloudy 61% 5 mph WNW 92%
10 PM 20° Mostly Cloudy 61% 5 mph WNW 94%
11 PM 20° Mostly Cloudy 58% 5 mph WNW 94%
12 AM 19° Mostly Cloudy 58% 5 mph WNW 93%
1 AM 19° Mostly Cloudy 58% 5 mph WNW 92%
2 AM 19° Mostly Cloudy 58% 5 mph WNW 91%
15-Day Forecast
Today
7/22
Mostly Cloudy
90%
17°
26°
Thu
7/23
Partly Cloudy
59%
16°
25°
Fri
7/24
Mostly Cloudy
50%
16°
23°
Sat
7/25
Overcast
83%
17°
24°
Sun
7/26
Rain
64%
17°
29°
Mon
7/27
Rain
70%
19°
32°
Tue
7/28
Rain
63%
18°
33°
Wed
7/29
Drizzle
43%
18°
32°
Thu
7/30
Rain
68%
17°
29°
Fri
7/31
Rain
64%
16°
27°
Sat
8/1
Drizzle
60%
17°
28°
Sun
8/2
Drizzle
60%
17°
28°
Mon
8/3
Drizzle
60%
17°
29°
Tue
8/4
Drizzle
60%
17°
29°
Wed
8/5
Drizzle
60%
18°
30°
34
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
34 AQI 6.1 µg/m³
O3
Ground-level ozone
31 AQI 33 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 34 Good 31 34
Thu 33 Good 31 33
Fri 37 Good 23 37
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, 06:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE336 J/kg
MLCAPE266 J/kg
MUCAPE564 J/kg
SBCIN-10 J/kg
MLCIN0 J/kg
Lifted Index-2.3
Kinematics
0–6 km Shear36 kt
0–1 km Shear25 kt
Eff. Shear35 kt
0–1 km SRH-98
0–3 km SRH-99
Eff. SRH-99
Storm Motion237° @ 40 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index35.6
Thermo & Levels
PWAT1.53 in
0–3 km LR5.3 °C/km
700–500 LR5.5 °C/km
Total Totals46.4
LCL877 hPa
LFC827 hPa
EL224 hPa
Freezing Lvl12,648 ft