Areal Flood Watch 1:00 AM

Silver Spring, Maryland

Last updated: 2:19 AM CDT  ·  Refresh
22°C
Feels like 23°
Rain
▲ 31°  /  ▼ 19°
Wind
6 mph SW
Humidity
92%
Dew Point
20°
Pressure
29.42 inHg
Visibility
8 mi
UV Index
0.0
Cloud Cover
76%
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 rain at 21°C. Precipitation is likely — peak probability 51% around 3 AM. Atmospheric instability is elevated (CAPE up to 923 J/kg) — isolated convective development possible. Sunrise: 6:00AM · Sunset: 8:28PM.

Alerts

Areal Flood Watch
Expires 1:00 AM
40 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
51%
4 AM
22°
50%
5 AM
20°
31%
6 AM
21°
33%
7 AM
22°
18%
8 AM
23°
19%
9 AM
23°
20%
10 AM
25°
16%
11 AM
26°
13%
12 PM
27°
13%
1 PM
29°
12%
2 PM
29°
12%
3 PM
29°
12%
4 PM
29°
14%
5 PM
30°
14%
6 PM
29°
9%
7 PM
28°
7%
8 PM
27°
11%
9 PM
26°
11%
10 PM
24°
11%
11 PM
24°
14%
12 AM
23°
14%
1 AM
24°
11%
2 AM
23°
11%
7-Day Forecast
Today
31° 19°
Mostly Clear with a 51% chance of rain.
Thu
28° 19°
Clear.
Fri
29° 17°
Partly Cloudy.
Sat
28° 18°
Mostly Clear.
Sun
32° 20°
Rain, 70% chance.
Mon
33° 22°
Rain, 70% chance.
Tue
35° 22°
Thunderstorm, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 22° Rain 51% 6 mph SW 92%
4 AM 22° Mostly Cloudy 50% 6 mph SW 94%
5 AM 20° Partly Cloudy 31% 5 mph SW 94%
6 AM 21° Mostly Clear 33% 5 mph SW 93%
7 AM 22° Partly Cloudy 18% 6 mph SW 91%
8 AM 23° Partly Cloudy 19% 6 mph WSW 87%
9 AM 23° Partly Cloudy 20% 7 mph WSW 80%
10 AM 25° Partly Cloudy 16% 8 mph W 71%
11 AM 26° Partly Cloudy 13% 9 mph W 64%
12 PM 27° Partly Cloudy 13% 9 mph W 59%
1 PM 29° Mostly Clear 12% 10 mph W 54%
2 PM 29° Mostly Clear 12% 10 mph W 50%
3 PM 29° Mostly Clear 12% 10 mph WNW 50%
4 PM 29° Partly Cloudy 14% 9 mph WNW 50%
5 PM 30° Partly Cloudy 14% 8 mph WNW 51%
6 PM 29° Mostly Clear 9% 7 mph NW 54%
7 PM 28° Mostly Clear 7% 6 mph NW 58%
8 PM 27° Partly Cloudy 11% 5 mph NNW 62%
9 PM 26° Partly Cloudy 11% 6 mph NNW 64%
10 PM 24° Partly Cloudy 11% 6 mph NNW 64%
11 PM 24° Partly Cloudy 14% 7 mph N 62%
12 AM 23° Partly Cloudy 14% 7 mph N 62%
1 AM 24° Partly Cloudy 11% 7 mph N 61%
2 AM 23° Partly Cloudy 11% 7 mph N 61%
15-Day Forecast
Today
7/22
Mostly Clear
51%
19°
31°
Thu
7/23
Clear
12%
19°
28°
Fri
7/24
Partly Cloudy
3%
17°
29°
Sat
7/25
Mostly Clear
16%
18°
28°
Sun
7/26
Rain
70%
20°
32°
Mon
7/27
Rain
70%
22°
33°
Tue
7/28
Thunderstorm
63%
22°
35°
Wed
7/29
Drizzle
69%
22°
33°
Thu
7/30
Drizzle
44%
21°
32°
Fri
7/31
Drizzle
51%
19°
31°
Sat
8/1
Drizzle
60%
23°
33°
Sun
8/2
Drizzle
60%
23°
33°
Mon
8/3
Rain
90%
23°
33°
Tue
8/4
Drizzle
60%
24°
34°
Wed
8/5
Drizzle
60%
24°
34°
40
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
28 AQI 5.1 µg/m³
O3
Ground-level ozone
Dominant
40 AQI 44 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 40 Good 40 28
Thu 39 Good 39 12
Fri 43 Good 43 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, 06:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 90 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE65 J/kg
MLCAPE181 J/kg
MUCAPE559 J/kg
SBCIN-254 J/kg
MLCIN0 J/kg
Lifted Index-0.3
Kinematics
0–6 km Shear43 kt
0–1 km Shear27 kt
Eff. Shear19 kt
0–1 km SRH-33
0–3 km SRH-50
Eff. SRH-40
Storm Motion225° @ 35 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.4
Thermo & Levels
PWAT2.05 in
0–3 km LR4.5 °C/km
700–500 LR5.7 °C/km
Total Totals47.8
LCL979 hPa
LFC677 hPa
EL477 hPa
Freezing Lvl14,055 ft