Grayson County, Virginia, United States

Last updated: 5:16 AM CDT · Refresh

20°C

Feels like 19°

Mostly Clear

▲ 29° / ▼ 18°

Wind

12 mph WNW

Humidity

91%

Dew Point

19°

Pressure

26.73 inHg

Visibility

9 mi

UV Index

0.0

Cloud Cover

26%

Sunrise

6:39 AM

Sunset

8:20 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: Grayson County is currently mostly clear at 20°C. Precipitation is likely — peak probability 62% around 8 PM. Atmospheric instability is elevated (CAPE up to 2186 J/kg) — isolated convective development possible. Sunrise: 6:39AM · Sunset: 8:20PM.

34 AQI · Good Dominant: O3 Air Quality

Hourly Forecast · Next 24 Hours

Now

20°

7 AM

19°

23%

8 AM

19°

21%

9 AM

21°

24%

10 AM

23°

24%

11 AM

24°

31%

12 PM

26°

31%

1 PM

26°

26%

2 PM

27°

31%

3 PM

27°

34%

4 PM

27°

35%

5 PM

26°

43%

6 PM

26°

53%

7 PM

25°

62%

8 PM

24°

62%

9 PM

23°

62%

10 PM

21°

44%

11 PM

21°

35%

12 AM

20°

39%

1 AM

19°

34%

2 AM

19°

25%

3 AM

19°

35%

4 AM

19°

40%

5 AM

19°

42%

7-Day Forecast

Today

29° 18°

Partly Cloudy with a 62% chance of rain.

Wed

29° 18°

Partly Cloudy with a 51% chance of rain.

Thu

29° 18°

Mostly Cloudy with a 32% chance of rain.

Fri

29° 18°

Clear with a 53% chance of rain.

Sat

30° 17°

Rain, 64% chance.

Sun

31° 18°

Rain, 63% chance.

Mon

31° 18°

Drizzle, 63% chance.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 20° Mostly Clear 6% 12 mph WNW 91%

7 AM 19° Mostly Clear 23% 9 mph WNW 89%

8 AM 19° Mostly Clear 21% 9 mph WNW 86%

9 AM 21° Mostly Clear 24% 10 mph WNW 78%

10 AM 23° Mostly Clear 24% 11 mph WNW 71%

11 AM 24° Mostly Clear 31% 11 mph WNW 64%

12 PM 26° Mostly Clear 31% 10 mph WNW 61%

1 PM 26° Partly Cloudy 26% 10 mph WNW 58%

2 PM 27° Partly Cloudy 31% 10 mph WNW 57%

3 PM 27° Mostly Cloudy 34% 10 mph WNW 58%

4 PM 27° Partly Cloudy 35% 10 mph W 59%

5 PM 26° Partly Cloudy 43% 10 mph W 61%

6 PM 26° Partly Cloudy 53% 8 mph W 67%

7 PM 25° Partly Cloudy 62% 8 mph W 74%

8 PM 24° Drizzle 62% 8 mph W 80%

9 PM 23° Drizzle 62% 7 mph W 83%

10 PM 21° Overcast 44% 7 mph W 85%

11 PM 21° Overcast 35% 8 mph W 87%

12 AM 20° Mostly Cloudy 39% 8 mph WNW 90%

1 AM 19° Rain 34% 9 mph WNW 91%

2 AM 19° Rain 25% 9 mph WNW 92%

3 AM 19° Rain 35% 9 mph WNW 89%

4 AM 19° Mostly Cloudy 40% 9 mph W 86%

5 AM 19° Mostly Cloudy 42% 9 mph W 84%

15-Day Forecast

Today

8/11

Partly Cloudy

62%

18°

29°

Wed

8/12

Partly Cloudy

51%

18°

29°

Thu

8/13

Mostly Cloudy

32%

18°

29°

Fri

8/14

Clear

53%

18°

29°

Sat

8/15

Rain

64%

17°

30°

Sun

8/16

Rain

63%

18°

31°

Mon

8/17

Drizzle

63%

18°

31°

Tue

8/18

Drizzle

46%

17°

30°

Wed

8/19

Drizzle

35%

17°

30°

Thu

8/20

Drizzle

45%

18°

29°

Fri

8/21

Drizzle

60%

17°

30°

Sat

8/22

Drizzle

60%

17°

29°

Sun

8/23

Drizzle

60%

17°

29°

Mon

8/24

Drizzle

60%

17°

28°

Tue

8/25

Drizzle

60%

17°

27°

Good

U.S. Air Quality Index · Dominant: O3

50 100 150 200

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

Pollutant Breakdown · Today

PM_2.5

Fine particulate matter

31 AQI 5.5 µg/m³

O₃

Ground-level ozone

Dominant

34 AQI 38 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Today 34 Good 34 31

Wed 44 Good 33 44

Thu 29 Good 29 28

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. PM_2.5 (fine particles) is reported in µg/m³ and ozone (O₃) in ppb. Forecast source: NWS NAQFC.

Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio

RAP

Valid Tue Aug 11, 09:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE1028 J/kg

MLCAPE807 J/kg

MUCAPE1441 J/kg

SBCIN-161 J/kg

MLCIN0 J/kg

Lifted Index-4.7

Kinematics

0–6 km Shear14 kt

0–1 km Shear16 kt

Eff. Shear14 kt

0–1 km SRH15

0–3 km SRH24

Eff. SRH24

Storm Motion306° @ 31 kt

0–1 km EHI0.1

Composite Parameters

Sig. Tornado0.0

STP (eff)0.0

Supercell0.0

K-Index30.4

Thermo & Levels

PWAT1.02 in

0–3 km LR5.2 °C/km

700–500 LR7.2 °C/km

Total Totals51.7

LCL887 hPa

LFC675 hPa

EL204 hPa

Freezing Lvl11,768 ft

Grayson County, Virginia, United States

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