Monitoring Tsunami Impacts Across the Pacific; Air Quality Concerns; Dangerous Heat; Critical Fire Weather for the West

Tsunami impacts continue for portions of the Pacific basin. Wildfire smoke causes unhealthy air in Midwest to Great Lakes. Heat dome spans Mississippi Valley to Mid-Atlantic with excessive heat warnings and advisories. Critical fire weather in Great Basin to Pacific Northwest (dry thunderstorms). Cold front spawns severe storms/heavy rain in Central U.S. today, shifts to East Coast Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Harford County Airport (K0W3)

Lat: 39.57°NLon: 76.2°WElev: 412ft.

Fair

89°F

32°C

Humidity	55%
Wind Speed	S 7 mph
Barometer	29.96 in
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	95°F (35°C)
Last update	30 Jul 5:55 pm EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

2 Miles N Perryville MD

Flood Watch July 31, 02:00pm until August 1, 02:00am

Heat Advisory until July 30, 08:00pm

Click here for hazard details and duration

Flood Watch

...

Heat Advisory until July 30, 08:00pm
NOW until 8:00pm Wed
Heat Advisory
Tonight
Low: 75 °F
Mostly Clear
Thursday
High: 90 °F
Slight Chance
T-storms then
T-storms
Thursday Night
Low: 68 °F
T-storms then
Showers
Friday
High: 74 °F
Showers
Likely then
Chance
T-storms
Friday Night
Low: 61 °F
Chance
T-storms then
Slight Chance
Showers
Saturday
High: 79 °F
Sunny
Saturday Night
Low: 60 °F
Mostly Clear
Sunday
High: 81 °F
Sunny

Detailed Forecast

Tonight

Mostly clear, with a low around 75. Southwest wind around 5 mph becoming calm in the evening.

Thursday

Showers and thunderstorms likely before 3pm, then showers and possibly a thunderstorm between 3pm and 5pm, then showers and thunderstorms likely after 5pm. High near 90. Heat index values as high as 100. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

Thursday Night

Showers and thunderstorms likely, then showers and possibly a thunderstorm after 8pm. Low around 68. Northeast wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

Friday

Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms after 8am. Mostly cloudy, with a high near 74. North wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night

A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 61. North wind around 7 mph. Chance of precipitation is 30%.

Saturday

Sunny, with a high near 79.

Saturday Night

Mostly clear, with a low around 60.

Sunday

Sunny, with a high near 81.

Sunday Night

Partly cloudy, with a low around 62.

Monday

Mostly sunny, with a high near 83.

Monday Night

Partly cloudy, with a low around 64.