Areal Flood Watch 1:00 AM

Silver Spring, Maryland

Last updated: 1:07 AM CDT  ·  Refresh
22°C
Feels like 23°
Overcast
▲ 31°  /  ▼ 18°
Wind
7 mph SSW
Humidity
92%
Dew Point
21°
Pressure
29.47 inHg
Visibility
7 mi
UV Index
0.0
Cloud Cover
89%
Sunrise
6:00 AM
Sunset
8:28 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Silver Spring is currently overcast at 22°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1066 J/kg) — isolated convective development possible. Sunrise: 6:00AM · Sunset: 8:28PM.

Alerts

Areal Flood Watch
Expires 1:00 AM
41 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
39%
3 AM
21°
33%
4 AM
21°
32%
5 AM
21°
19%
6 AM
21°
26%
7 AM
21°
27%
8 AM
22°
35%
9 AM
24°
36%
10 AM
25°
28%
11 AM
26°
21%
12 PM
27°
22%
1 PM
28°
22%
2 PM
30°
22%
3 PM
30°
23%
4 PM
30°
23%
5 PM
30°
21%
6 PM
28°
21%
7 PM
27°
18%
8 PM
27°
18%
9 PM
25°
18%
10 PM
24°
19%
11 PM
24°
19%
12 AM
23°
19%
1 AM
21°
10%
7-Day Forecast
Today
31° 18°
Mostly Clear with a 39% chance of rain.
Thu
29° 18°
Clear.
Fri
30° 17°
Partly Cloudy with a 32% chance of rain.
Sat
29° 18°
Mostly Clear with a 44% chance of rain.
Sun
33° 22°
Rain, 70% chance.
Mon
33° 21°
Rain, 70% chance.
Tue
35° 22°
Rain, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 22° Overcast 39% 7 mph SSW 92%
3 AM 21° Mostly Cloudy 33% 6 mph SSW 94%
4 AM 21° Partly Cloudy 32% 6 mph SW 94%
5 AM 21° Mostly Clear 19% 6 mph SW 94%
6 AM 21° Partly Cloudy 26% 6 mph SSW 93%
7 AM 21° Partly Cloudy 27% 6 mph SW 92%
8 AM 22° Partly Cloudy 35% 6 mph SW 89%
9 AM 24° Partly Cloudy 36% 7 mph WSW 81%
10 AM 25° Partly Cloudy 28% 8 mph WSW 73%
11 AM 26° Partly Cloudy 21% 9 mph W 65%
12 PM 27° Partly Cloudy 22% 9 mph W 60%
1 PM 28° Mostly Clear 22% 10 mph W 55%
2 PM 30° Mostly Clear 22% 10 mph W 50%
3 PM 30° Mostly Clear 23% 10 mph W 49%
4 PM 30° Mostly Clear 23% 10 mph WNW 49%
5 PM 30° Mostly Clear 21% 9 mph WNW 50%
6 PM 28° Mostly Clear 21% 8 mph WNW 53%
7 PM 27° Mostly Clear 18% 7 mph NW 57%
8 PM 27° Partly Cloudy 18% 6 mph NW 61%
9 PM 25° Partly Cloudy 18% 7 mph NW 60%
10 PM 24° Partly Cloudy 19% 8 mph NNW 60%
11 PM 24° Partly Cloudy 19% 8 mph NNW 60%
12 AM 23° Partly Cloudy 19% 8 mph NNW 59%
1 AM 21° Mostly Cloudy 10% 8 mph N 58%
15-Day Forecast
Today
7/22
Mostly Clear
39%
18°
31°
Thu
7/23
Clear
3%
18°
29°
Fri
7/24
Partly Cloudy
32%
17°
30°
Sat
7/25
Mostly Clear
44%
18°
29°
Sun
7/26
Rain
70%
22°
33°
Mon
7/27
Rain
70%
21°
33°
Tue
7/28
Rain
71%
22°
35°
Wed
7/29
Drizzle
44%
21°
32°
Thu
7/30
Drizzle
44%
20°
31°
Fri
7/31
Drizzle
51%
19°
32°
Sat
8/1
Drizzle
60%
22°
32°
Sun
8/2
Drizzle
60%
22°
32°
Mon
8/3
Drizzle
60%
23°
33°
Tue
8/4
Rain
90%
24°
34°
Wed
8/5
Drizzle
60%
24°
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
27 AQI 4.8 µg/m³
O3
Ground-level ozone
Dominant
41 AQI 45 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 41 Good 41 27
Thu 39 Good 39 13
Fri 44 Good 44 19
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
SBCAPE135 J/kg
MLCAPE83 J/kg
MUCAPE135 J/kg
SBCIN-175 J/kg
MLCIN0 J/kg
Lifted Index-1.1
Kinematics
0–6 km Shear34 kt
0–1 km Shear23 kt
Eff. Shear30 kt
0–1 km SRH-31
0–3 km SRH-57
Eff. SRH-57
Storm Motion225° @ 34 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index33.7
Thermo & Levels
PWAT1.85 in
0–3 km LR4.7 °C/km
700–500 LR5.6 °C/km
Total Totals44.7
LCL982 hPa
LFC713 hPa
EL420 hPa
Freezing Lvl14,511 ft