Severe Thunderstorm Watch 12:00 AM

Arlington County, Virginia, United States

Last updated: 11:56 PM CDT  ·  Refresh
22°C
Feels like 24°
Rain
▲ 31°  /  ▼ 19°
Wind
8 mph SSW
Humidity
92%
Dew Point
21°
Pressure
29.53 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
88%
Sunrise
6:00 AM
Sunset
8:28 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Arlington County is currently rain at 22°C. Precipitation is likely — peak probability 62% around 12 AM. Atmospheric instability is elevated (CAPE up to 1124 J/kg) — isolated convective development possible. Sunrise: 6:00AM · Sunset: 8:28PM.

Alerts

Severe Thunderstorm Watch
Expires 12:00 AM
41 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
62%
1 AM
23°
54%
2 AM
23°
50%
3 AM
23°
30%
4 AM
23°
25%
5 AM
21°
32%
6 AM
22°
34%
7 AM
23°
34%
8 AM
24°
35%
9 AM
24°
32%
10 AM
26°
31%
11 AM
27°
40%
12 PM
28°
40%
1 PM
29°
30%
2 PM
29°
31%
3 PM
29°
23%
4 PM
29°
24%
5 PM
29°
22%
6 PM
28°
18%
7 PM
27°
18%
8 PM
27°
19%
9 PM
26°
19%
10 PM
26°
19%
11 PM
24°
9%
7-Day Forecast
Today
31° 19°
Partly Cloudy with a 62% chance of rain.
Thu
29° 19°
Mostly Clear.
Fri
29° 18°
Mostly Cloudy with a 32% chance of rain.
Sat
28° 19°
Partly Cloudy with a 44% chance of rain.
Sun
32° 19°
Rain, 70% chance.
Mon
34° 21°
Rain, 64% chance.
Tue
36° 21°
Thunderstorm, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 22° Rain 62% 8 mph SSW 92%
1 AM 23° Thunderstorm 54% 8 mph SW 93%
2 AM 23° Mostly Cloudy 50% 8 mph SSW 93%
3 AM 23° Partly Cloudy 30% 7 mph SSW 94%
4 AM 23° Mostly Clear 25% 6 mph SSW 94%
5 AM 21° Partly Cloudy 32% 6 mph SSW 93%
6 AM 22° Mostly Cloudy 34% 6 mph SW 92%
7 AM 23° Mostly Cloudy 34% 7 mph WSW 90%
8 AM 24° Partly Cloudy 35% 7 mph WSW 83%
9 AM 24° Partly Cloudy 32% 7 mph W 76%
10 AM 26° Mostly Cloudy 31% 8 mph W 68%
11 AM 27° Partly Cloudy 40% 8 mph W 62%
12 PM 28° Partly Cloudy 40% 9 mph W 56%
1 PM 29° Partly Cloudy 30% 9 mph W 50%
2 PM 29° Partly Cloudy 31% 8 mph W 49%
3 PM 29° Partly Cloudy 23% 8 mph WNW 50%
4 PM 29° Partly Cloudy 24% 8 mph WNW 51%
5 PM 29° Partly Cloudy 22% 7 mph WNW 54%
6 PM 28° Partly Cloudy 18% 6 mph NW 57%
7 PM 27° Partly Cloudy 18% 6 mph NW 59%
8 PM 27° Partly Cloudy 19% 6 mph NW 59%
9 PM 26° Partly Cloudy 19% 7 mph NNW 59%
10 PM 26° Partly Cloudy 19% 8 mph NNW 59%
11 PM 24° Partly Cloudy 9% 8 mph NNW 58%
15-Day Forecast
Today
7/22
Partly Cloudy
62%
19°
31°
Thu
7/23
Mostly Clear
10%
19°
29°
Fri
7/24
Mostly Cloudy
32%
18°
29°
Sat
7/25
Partly Cloudy
44%
19°
28°
Sun
7/26
Rain
70%
19°
32°
Mon
7/27
Rain
64%
21°
34°
Tue
7/28
Thunderstorm
71%
21°
36°
Wed
7/29
Rain
53%
20°
31°
Thu
7/30
Drizzle
44%
19°
31°
Fri
7/31
Drizzle
51%
18°
31°
Sat
8/1
Drizzle
60%
21°
31°
Sun
8/2
Drizzle
60%
21°
31°
Mon
8/3
Drizzle
60%
22°
33°
Tue
8/4
Drizzle
60%
23°
34°
Wed
8/5
Drizzle
60%
23°
33°
41
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
PM2.5
Fine particulate matter
24 AQI 4.5 µg/m³
O3
Ground-level ozone
Dominant
41 AQI 44 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 41 Good 41 24
Thu 38 Good 38 13
Fri 44 Good 44 18
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 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE115 J/kg
MLCAPE113 J/kg
MUCAPE180 J/kg
SBCIN-190 J/kg
MLCIN0 J/kg
Lifted Index-0.7
Kinematics
0–6 km Shear36 kt
0–1 km Shear27 kt
Eff. Shear34 kt
0–1 km SRH-16
0–3 km SRH-19
Eff. SRH-19
Storm Motion233° @ 33 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index33.8
Thermo & Levels
PWAT1.91 in
0–3 km LR4.6 °C/km
700–500 LR5.5 °C/km
Total Totals44.7
LCL981 hPa
LFC703 hPa
EL428 hPa
Freezing Lvl14,524 ft