Severe Thunderstorm Watch 11:00 PM Areal Flood Watch 1:00 AM

Harford County, Maryland, United States

Last updated: 10:36 PM CDT  ·  Refresh
21°C
Feels like 22°
Overcast
▲ 29°  /  ▼ 20°
Wind
9 mph S
Humidity
94%
Dew Point
21°
Pressure
29.35 inHg
Visibility
3 mi
UV Index
0.0
Cloud Cover
95%
Sunrise
5:55 AM
Sunset
8:27 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Harford County is currently overcast at 21°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1142 J/kg) — isolated convective development possible. Sunrise: 5:55AM · Sunset: 8:27PM.

Alerts

Severe Thunderstorm Watch
Expires 11:00 PM
Areal Flood Watch
Expires 1:00 AM
56 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
21°
41%
12 AM
21°
23%
1 AM
21°
24%
2 AM
21°
17%
3 AM
21°
14%
4 AM
21°
19%
5 AM
20°
20%
6 AM
21°
23%
7 AM
21°
22%
8 AM
22°
16%
9 AM
24°
24%
10 AM
25°
28%
11 AM
26°
36%
12 PM
27°
37%
1 PM
28°
33%
2 PM
28°
23%
3 PM
28°
24%
4 PM
28°
24%
5 PM
28°
24%
6 PM
27°
18%
7 PM
26°
19%
8 PM
24°
19%
9 PM
23°
19%
10 PM
22°
19%
7-Day Forecast
Tonight
29° 20°
Overcast with a 41% chance of rain.
Wed
29° 18°
Partly Cloudy with a 36% chance of rain.
Thu
28° 16°
Clear.
Fri
29° 15°
Mostly Cloudy.
Sat
29° 16°
Mostly Clear.
Sun
30° 17°
Rain, 70% chance.
Mon
32° 19°
Rain, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 21° Overcast 41% 9 mph S 94%
12 AM 21° Overcast 23% 10 mph SSW 93%
1 AM 21° Overcast 24% 10 mph SW 93%
2 AM 21° Overcast 17% 9 mph SW 93%
3 AM 21° Partly Cloudy 14% 8 mph SW 94%
4 AM 21° Partly Cloudy 19% 7 mph SW 94%
5 AM 20° Partly Cloudy 20% 7 mph SW 94%
6 AM 21° Partly Cloudy 23% 7 mph SW 93%
7 AM 21° Mostly Clear 22% 7 mph WSW 92%
8 AM 22° Mostly Clear 16% 8 mph WSW 87%
9 AM 24° Mostly Clear 24% 8 mph WSW 80%
10 AM 25° Partly Cloudy 28% 9 mph W 74%
11 AM 26° Partly Cloudy 36% 10 mph W 68%
12 PM 27° Partly Cloudy 37% 12 mph W 63%
1 PM 28° Mostly Clear 33% 13 mph W 58%
2 PM 28° Mostly Clear 23% 13 mph W 54%
3 PM 28° Partly Cloudy 24% 12 mph W 53%
4 PM 28° Partly Cloudy 24% 11 mph W 52%
5 PM 28° Partly Cloudy 24% 10 mph WNW 54%
6 PM 27° Mostly Clear 18% 9 mph WNW 58%
7 PM 26° Mostly Clear 19% 9 mph WNW 61%
8 PM 24° Mostly Clear 19% 9 mph NW 62%
9 PM 23° Mostly Clear 19% 9 mph NW 60%
10 PM 22° Mostly Clear 19% 9 mph NW 59%
15-Day Forecast
Today
7/21
Overcast
41%
20°
29°
Wed
7/22
Partly Cloudy
36%
18°
29°
Thu
7/23
Clear
3%
16°
28°
Fri
7/24
Mostly Cloudy
14%
15°
29°
Sat
7/25
Mostly Clear
19%
16°
29°
Sun
7/26
Rain
70%
17°
30°
Mon
7/27
Rain
71%
19°
32°
Tue
7/28
Rain
63%
18°
31°
Wed
7/29
Drizzle
44%
17°
30°
Thu
7/30
Drizzle
44%
17°
29°
Fri
7/31
Drizzle
60%
17°
29°
Sat
8/1
Drizzle
60%
18°
29°
Sun
8/2
Drizzle
60%
18°
30°
Mon
8/3
Drizzle
60%
19°
31°
Tue
8/4
Drizzle
60%
19°
32°
56
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
56 AQI 11.7 µg/m³
O3
Ground-level ozone
39 AQI 42 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 56 Moderate 39 56
Thu 39 Good 39 26
Fri 40 Good 40 33
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, 02:00'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
SBCAPE53 J/kg
MLCAPE43 J/kg
MUCAPE143 J/kg
SBCIN-161 J/kg
MLCIN0 J/kg
Lifted Index-0.5
Kinematics
0–6 km Shear36 kt
0–1 km Shear18 kt
Eff. Shear11 kt
0–1 km SRH-39
0–3 km SRH-80
Eff. SRH-30
Storm Motion224° @ 35 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index35.5
Thermo & Levels
PWAT2.02 in
0–3 km LR4.3 °C/km
700–500 LR5.8 °C/km
Total Totals46.1
LCL982 hPa
LFC630 hPa
EL391 hPa
Freezing Lvl14,508 ft