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

Howard County, Maryland, United States

Last updated: 10:31 PM CDT  ·  Refresh
21°C
Feels like 22°
Haze
▲ 31°  /  ▼ 20°
Wind
9 mph SSW
Humidity
94%
Dew Point
20°
Pressure
29.31 inHg
Visibility
1 mi
UV Index
0.0
Cloud Cover
94%
Sunrise
5:58 AM
Sunset
8:29 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Howard County is currently haze at 21°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: 5:58AM · Sunset: 8:29PM.

Alerts

Severe Thunderstorm Watch
Expires 11:00 PM
Areal Flood Watch
Expires 1:00 AM
39 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
21°
25%
12 AM
21°
28%
1 AM
21°
38%
2 AM
21°
34%
3 AM
21°
22%
4 AM
21°
23%
5 AM
20°
35%
6 AM
21°
32%
7 AM
21°
16%
8 AM
22°
11%
9 AM
24°
14%
10 AM
25°
14%
11 AM
26°
33%
12 PM
27°
25%
1 PM
28°
21%
2 PM
29°
21%
3 PM
29°
21%
4 PM
28°
22%
5 PM
27°
22%
6 PM
26°
18%
7 PM
24°
19%
8 PM
24°
19%
9 PM
23°
19%
10 PM
23°
19%
7-Day Forecast
Tonight
31° 20°
Haze with a 25% chance of rain.
Wed
30° 20°
Mostly Clear with a 35% chance of rain.
Thu
28° 17°
Clear.
Fri
29° 16°
Overcast.
Sat
28° 17°
Partly Cloudy.
Sun
31° 18°
Rain, 70% chance.
Mon
33° 21°
Rain, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 21° Haze 25% 9 mph SSW 94%
12 AM 21° Overcast 28% 8 mph SSW 93%
1 AM 21° Overcast 38% 8 mph SW 94%
2 AM 21° Mostly Cloudy 34% 8 mph SW 94%
3 AM 21° Partly Cloudy 22% 8 mph SW 95%
4 AM 21° Partly Cloudy 23% 8 mph SW 96%
5 AM 20° Partly Cloudy 35% 7 mph SW 95%
6 AM 21° Partly Cloudy 32% 7 mph SW 94%
7 AM 21° Mostly Clear 16% 7 mph SW 93%
8 AM 22° Mostly Clear 11% 8 mph WSW 88%
9 AM 24° Mostly Clear 14% 9 mph W 81%
10 AM 25° Mostly Clear 14% 10 mph W 74%
11 AM 26° Mostly Clear 33% 11 mph W 68%
12 PM 27° Mostly Clear 25% 11 mph W 63%
1 PM 28° Mostly Clear 21% 12 mph W 58%
2 PM 29° Clear 21% 12 mph W 55%
3 PM 29° Clear 21% 12 mph WNW 54%
4 PM 28° Clear 22% 12 mph WNW 54%
5 PM 27° Clear 22% 11 mph WNW 56%
6 PM 26° Clear 18% 9 mph WNW 60%
7 PM 24° Clear 19% 8 mph WNW 64%
8 PM 24° Mostly Clear 19% 7 mph NW 65%
9 PM 23° Mostly Clear 19% 8 mph NW 63%
10 PM 23° Partly Cloudy 19% 8 mph NW 61%
15-Day Forecast
Today
7/21
Haze
25%
20°
31°
Wed
7/22
Mostly Clear
35%
20°
30°
Thu
7/23
Clear
3%
17°
28°
Fri
7/24
Overcast
7%
16°
29°
Sat
7/25
Partly Cloudy
8%
17°
28°
Sun
7/26
Rain
70%
18°
31°
Mon
7/27
Rain
71%
21°
33°
Tue
7/28
Thunderstorm
63%
19°
33°
Wed
7/29
Drizzle
44%
18°
30°
Thu
7/30
Drizzle
44%
18°
29°
Fri
7/31
Drizzle
60%
17°
29°
Sat
8/1
Drizzle
60%
20°
30°
Sun
8/2
Drizzle
60%
21°
31°
Mon
8/3
Drizzle
60%
21°
32°
Tue
8/4
Drizzle
60%
22°
33°
39
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
36 AQI 6.5 µg/m³
O3
Ground-level ozone
Dominant
39 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 39 Good 39 36
Thu 37 Good 37 13
Fri 40 Good 40 21
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
SBCAPE67 J/kg
MLCAPE56 J/kg
MUCAPE121 J/kg
SBCIN-211 J/kg
MLCIN0 J/kg
Lifted Index-0.8
Kinematics
0–6 km Shear33 kt
0–1 km Shear28 kt
Eff. Shear3 kt
0–1 km SRH-40
0–3 km SRH-29
Eff. SRH8
Storm Motion235° @ 37 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index33.0
Thermo & Levels
PWAT1.87 in
0–3 km LR4.2 °C/km
700–500 LR6.1 °C/km
Total Totals46.3
LCL981 hPa
LFC605 hPa
EL387 hPa
Freezing Lvl14,623 ft