Severe Thunderstorm Watch 12:00 AM

Saint Marys Beach, Maryland

Last updated: 11:47 PM CDT  ·  Refresh
23°C
Feels like 23°
Rain
▲ 29°  /  ▼ 20°
Wind
12 mph WSW
Humidity
92%
Dew Point
22°
Pressure
29.71 inHg
Visibility
2 mi
UV Index
0.0
Cloud Cover
98%
Sunrise
6:00 AM
Sunset
8:25 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Saint Marys Beach is currently rain at 23°C. Precipitation is likely — peak probability 90% around 12 AM. Atmospheric instability is elevated (CAPE up to 1610 J/kg) — isolated convective development possible. Sunrise: 6:00AM · Sunset: 8:25PM.

Alerts

Severe Thunderstorm Watch
Expires 12:00 AM
41 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
90%
1 AM
23°
84%
2 AM
23°
64%
3 AM
23°
65%
4 AM
23°
53%
5 AM
22°
30%
6 AM
23°
39%
7 AM
23°
28%
8 AM
24°
35%
9 AM
26°
43%
10 AM
27°
52%
11 AM
28°
61%
12 PM
28°
53%
1 PM
29°
62%
2 PM
29°
62%
3 PM
29°
63%
4 PM
28°
64%
5 PM
28°
64%
6 PM
27°
65%
7 PM
26°
61%
8 PM
25°
61%
9 PM
25°
66%
10 PM
24°
58%
11 PM
24°
48%
7-Day Forecast
Today
29° 20°
Mostly Cloudy with a 90% chance of rain.
Thu
26° 19°
Partly Cloudy with a 48% chance of rain.
Fri
27° 19°
Partly Cloudy with a 36% chance of rain.
Sat
25° 19°
Overcast with a 37% chance of rain.
Sun
28° 18°
Rain, 70% chance.
Mon
31° 20°
Rain, 64% chance.
Tue
33° 20°
Thunderstorm, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 23° Rain 90% 12 mph WSW 92%
1 AM 23° Rain 84% 12 mph SW 93%
2 AM 23° Rain 64% 12 mph SW 93%
3 AM 23° Rain 65% 11 mph SW 94%
4 AM 23° Partly Cloudy 53% 9 mph SSW 95%
5 AM 22° Partly Cloudy 30% 8 mph SSW 93%
6 AM 23° Partly Cloudy 39% 9 mph SW 91%
7 AM 23° Partly Cloudy 28% 10 mph SW 89%
8 AM 24° Mostly Cloudy 35% 10 mph SW 84%
9 AM 26° Mostly Cloudy 43% 10 mph WSW 78%
10 AM 27° Mostly Cloudy 52% 10 mph WSW 72%
11 AM 28° Mostly Cloudy 61% 10 mph WSW 68%
12 PM 28° Heavy Rain 53% 9 mph WSW 64%
1 PM 29° Heavy Rain 62% 9 mph WSW 61%
2 PM 29° Mostly Cloudy 62% 8 mph WSW 61%
3 PM 29° Mostly Cloudy 63% 7 mph SW 62%
4 PM 28° Mostly Cloudy 64% 6 mph SSW 65%
5 PM 28° Mostly Cloudy 64% 5 mph SSW 71%
6 PM 27° Mostly Cloudy 65% 4 mph SSW 78%
7 PM 26° Mostly Cloudy 61% 4 mph SW 84%
8 PM 25° Mostly Cloudy 61% 4 mph SW 85%
9 PM 25° Rain 66% 4 mph SSW 86%
10 PM 24° Rain 58% 4 mph SSW 87%
11 PM 24° Rain 48% 6 mph NNW 82%
15-Day Forecast
Today
7/22
Mostly Cloudy
90%
20°
29°
Thu
7/23
Partly Cloudy
48%
19°
26°
Fri
7/24
Partly Cloudy
36%
19°
27°
Sat
7/25
Overcast
37%
19°
25°
Sun
7/26
Rain
70%
18°
28°
Mon
7/27
Rain
64%
20°
31°
Tue
7/28
Thunderstorm
71%
20°
33°
Wed
7/29
Rain
68%
19°
29°
Thu
7/30
Drizzle
44%
19°
27°
Fri
7/31
Drizzle
51%
18°
28°
Sat
8/1
Drizzle
60%
19°
28°
Sun
8/2
Drizzle
60%
20°
26°
Mon
8/3
Drizzle
60%
21°
28°
Tue
8/4
Rain
90%
21°
29°
Wed
8/5
Drizzle
60%
22°
28°
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
19 AQI 3.4 µg/m³
O3
Ground-level ozone
Dominant
41 AQI 45 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 41 Good 41 19
Thu 40 Good 40 20
Fri 38 Good 38 22
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, 03:00'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
SBCAPE145 J/kg
MLCAPE348 J/kg
MUCAPE890 J/kg
SBCIN-156 J/kg
MLCIN0 J/kg
Lifted Index-0.6
Kinematics
0–6 km Shear38 kt
0–1 km Shear24 kt
Eff. Shear38 kt
0–1 km SRH-15
0–3 km SRH-14
Eff. SRH-14
Storm Motion232° @ 37 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index33.8
Thermo & Levels
PWAT2.17 in
0–3 km LR4.6 °C/km
700–500 LR5.4 °C/km
Total Totals45.4
LCL988 hPa
LFC713 hPa
EL428 hPa
Freezing Lvl14,524 ft