Areal Flood Watch 7:00 AM

Grayson County, Virginia, United States

Last updated: 1:04 AM CDT  ·  Refresh
21°C
Feels like 21°
Mostly Cloudy
▲ 26°  /  ▼ 17°
Wind
11 mph WSW
Humidity
87%
Dew Point
19°
Pressure
26.53 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
65%
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 21°C. Precipitation is likely — peak probability 90% around 5 AM. Atmospheric instability is elevated (CAPE up to 870 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°
64%
3 AM
22°
71%
4 AM
21°
76%
5 AM
21°
90%
6 AM
19°
85%
7 AM
19°
84%
8 AM
19°
70%
9 AM
20°
73%
10 AM
21°
77%
11 AM
21°
73%
12 PM
21°
74%
1 PM
21°
74%
2 PM
23°
70%
3 PM
24°
63%
4 PM
24°
58%
5 PM
24°
51%
6 PM
24°
54%
7 PM
24°
55%
8 PM
23°
42%
9 PM
22°
44%
10 PM
21°
44%
11 PM
20°
42%
12 AM
20°
42%
1 AM
19°
47%
7-Day Forecast
Today
26° 17°
Rain, 90% chance.
Thu
25° 16°
Mostly Cloudy with a 59% chance of rain.
Fri
24° 16°
Overcast with a 66% chance of rain.
Sat
26° 17°
Overcast with a 90% chance of rain.
Sun
29° 18°
Rain, 82% chance.
Mon
33° 18°
Rain, 70% chance.
Tue
34° 18°
Rain, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 21° Mostly Cloudy 64% 11 mph WSW 87%
3 AM 22° Mostly Cloudy 71% 10 mph WSW 89%
4 AM 21° Mostly Cloudy 76% 10 mph WSW 92%
5 AM 21° Heavy Rain 90% 11 mph WSW 94%
6 AM 19° Heavy Rain 85% 9 mph WSW 95%
7 AM 19° Heavy Rain 84% 7 mph W 95%
8 AM 19° Heavy Rain 70% 6 mph WSW 94%
9 AM 20° Overcast 73% 6 mph WSW 93%
10 AM 21° Heavy Rain 77% 5 mph WSW 92%
11 AM 21° Rain 73% 5 mph WSW 92%
12 PM 21° Rain 74% 8 mph WSW 88%
1 PM 21° Mostly Cloudy 74% 6 mph WSW 85%
2 PM 23° Rain 70% 8 mph W 82%
3 PM 24° Partly Cloudy 63% 8 mph WSW 79%
4 PM 24° Mostly Cloudy 58% 7 mph WSW 76%
5 PM 24° Mostly Cloudy 51% 8 mph WSW 72%
6 PM 24° Mostly Cloudy 54% 7 mph WSW 77%
7 PM 24° Mostly Cloudy 55% 6 mph W 83%
8 PM 23° Mostly Cloudy 42% 5 mph W 88%
9 PM 22° Mostly Cloudy 44% 5 mph WNW 90%
10 PM 21° Mostly Cloudy 44% 5 mph WNW 91%
11 PM 20° Mostly Cloudy 42% 5 mph WNW 93%
12 AM 20° Mostly Cloudy 42% 5 mph WNW 92%
1 AM 19° Partly Cloudy 47% 4 mph NW 90%
15-Day Forecast
Today
7/22
Rain
90%
17°
26°
Thu
7/23
Mostly Cloudy
59%
16°
25°
Fri
7/24
Overcast
66%
16°
24°
Sat
7/25
Overcast
90%
17°
26°
Sun
7/26
Rain
82%
18°
29°
Mon
7/27
Rain
70%
18°
33°
Tue
7/28
Rain
71%
18°
34°
Wed
7/29
Drizzle
43%
17°
32°
Thu
7/30
Rain
68%
16°
29°
Fri
7/31
Rain
68%
16°
28°
Sat
8/1
Drizzle
60%
16°
28°
Sun
8/2
Drizzle
60%
16°
28°
Mon
8/3
Drizzle
60%
17°
29°
Tue
8/4
Drizzle
60%
17°
30°
Wed
8/5
Drizzle
60%
17°
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, 04:00'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
SBCAPE579 J/kg
MLCAPE557 J/kg
MUCAPE909 J/kg
SBCIN-47 J/kg
MLCIN0 J/kg
Lifted Index-2.8
Kinematics
0–6 km Shear39 kt
0–1 km Shear27 kt
Eff. Shear37 kt
0–1 km SRH-30
0–3 km SRH-47
Eff. SRH-47
Storm Motion236° @ 43 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index32.7
Thermo & Levels
PWAT1.54 in
0–3 km LR5.2 °C/km
700–500 LR6.0 °C/km
Total Totals47.8
LCL876 hPa
LFC693 hPa
EL214 hPa
Freezing Lvl12,539 ft