Flash Flood Warning — Mercer County, NJ, Bucks County, PA, Montgomery County, PA, Philadelphia County, PA 9:30 PM Flood Warning — Montgomery County, PA, Philadelphia County, PA 12:45 AM Areal Flood Watch 1:00 AM

Montgomery County, Pennsylvania, United States

Last updated: 9:10 PM CDT  ·  Refresh
18°C
Feels like 17°
Partly Cloudy
▲ 25°  /  ▼ 15°
Wind
9 mph NNE
Humidity
90%
Dew Point
17°
Pressure
29.71 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
38%
Sunrise
6:17 AM
Sunset
7:51 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Montgomery County is currently partly cloudy at 18°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:17AM · Sunset: 7:51PM.

Alerts

Flash Flood Warning
Mercer County, NJ, Bucks County, PA, Montgomery County, PA, Philadelphia County, PA
Expires 9:30 PM
Flood Warning
Montgomery County, PA, Philadelphia County, PA
Expires 12:45 AM
Areal Flood Watch
Expires 1:00 AM
35 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
18°
3%
11 PM
18°
21%
12 AM
18°
21%
1 AM
17°
14%
2 AM
17°
3%
3 AM
16°
7%
4 AM
16°
15%
5 AM
15°
15%
6 AM
15°
15%
7 AM
16°
15%
8 AM
16°
16%
9 AM
18°
16%
10 AM
19°
16%
11 AM
21°
17%
12 PM
22°
17%
1 PM
24°
8%
2 PM
26°
3%
3 PM
26°
3%
4 PM
26°
3%
5 PM
25°
3%
6 PM
24°
3%
7 PM
24°
3%
8 PM
23°
3%
9 PM
21°
24%
7-Day Forecast
Tonight
25° 15°
Partly Cloudy.
Fri
27° 15°
Partly Cloudy with a 29% chance of rain.
Sat
24° 18°
Overcast with a 75% chance of rain.
Sun
28° 18°
Mostly Cloudy with a 69% chance of rain.
Mon
27° 16°
Clear.
Tue
28° 17°
Rain, 61% chance.
Wed
29° 17°
Drizzle, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 18° Partly Cloudy 3% 10 mph NNE 90%
11 PM 18° Partly Cloudy 21% 8 mph N 91%
12 AM 18° Mostly Clear 21% 8 mph N 91%
1 AM 17° Partly Cloudy 14% 7 mph N 92%
2 AM 17° Partly Cloudy 3% 6 mph NNW 92%
3 AM 16° Partly Cloudy 7% 5 mph NNW 92%
4 AM 16° Partly Cloudy 15% 4 mph NNW 92%
5 AM 15° Partly Cloudy 15% 5 mph NNW 92%
6 AM 15° Partly Cloudy 15% 5 mph NNW 89%
7 AM 16° Partly Cloudy 15% 5 mph NNW 86%
8 AM 16° Partly Cloudy 16% 7 mph N 81%
9 AM 18° Partly Cloudy 16% 8 mph N 76%
10 AM 19° Partly Cloudy 16% 7 mph N 71%
11 AM 21° Mostly Clear 17% 7 mph N 65%
12 PM 22° Partly Cloudy 17% 6 mph NNE 62%
1 PM 24° Partly Cloudy 8% 6 mph NNE 60%
2 PM 26° Partly Cloudy 3% 5 mph NNE 57%
3 PM 26° Partly Cloudy 3% 4 mph NNE 56%
4 PM 26° Partly Cloudy 3% 4 mph NNE 55%
5 PM 25° Mostly Clear 3% 4 mph NE 54%
6 PM 24° Mostly Clear 3% 4 mph NE 58%
7 PM 24° Mostly Clear 3% 4 mph NE 62%
8 PM 23° Mostly Clear 3% 4 mph NE 66%
9 PM 21° Partly Cloudy 24% 2 mph ENE 70%
15-Day Forecast
Today
8/20
Partly Cloudy
3%
15°
25°
Fri
8/21
Partly Cloudy
29%
15°
27°
Sat
8/22
Overcast
75%
18°
24°
Sun
8/23
Mostly Cloudy
69%
18°
28°
Mon
8/24
Clear
8%
16°
27°
Tue
8/25
Rain
61%
17°
28°
Wed
8/26
Drizzle
71%
17°
29°
Thu
8/27
Rain
82%
18°
28°
Fri
8/28
Rain
69%
19°
30°
Sat
8/29
Rain
68%
19°
30°
Sun
8/30
Drizzle
64%
19°
30°
Mon
8/31
Drizzle
60%
18°
29°
Tue
9/1
Drizzle
60%
18°
28°
Wed
9/2
Drizzle
60%
18°
28°
Thu
9/3
Drizzle
60%
18°
27°
35
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
33 AQI 6.0 µg/m³
O3
Ground-level ozone
Dominant
35 AQI 38 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 35 Good 35 33
Sat 45 Good 45 24
Sun 39 Good 29 39
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 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Thu Aug 20, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE12 J/kg
MUCAPE4 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index6.5
Kinematics
0–6 km Shear40 kt
0–1 km Shear18 kt
Eff. Shear—
0–1 km SRH-75
0–3 km SRH138
Eff. SRH—
Storm Motion298° @ 26 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index35.5
Thermo & Levels
PWAT1.88 in
0–3 km LR3.6 °C/km
700–500 LR5.3 °C/km
Total Totals44.3
LCL987 hPa
LFC—
EL—
Freezing Lvl15,092 ft