I-495 @ MD-4MD054
Beside a road/2.6 mi away/148 ft/74 ft below here
temp, pavement temp, wind, visibility, precip
Severe Thunderstorm Watch, in full
Alert. A Severe Thunderstorm Watch is in force for Walker Mill until 8 PM today. Read the alert in full, and see what it means in the Field Book. Rain is likely this evening, from about 8 PM (71%).
Now. Walker Mill is 66° and partly cloudy at 2 PM. The dew point is 68°, so the air feels oppressive. Gentle breeze from the south-southwest at 11 mph.
Today and tonight. It warms to about 82° by 4 PM. Tonight falls to about 50° by 7 AM, under cloud. Air quality is moderate (index 53): fine for most people, though people unusually sensitive to air pollution may feel it outdoors.
The week. The warmest day ahead is Tuesday, near 64°, and the coolest tomorrow, near 55°. Rain is likely tomorrow (58%). Rain is possible Monday (32%).
The sky tonight. The sun sets at 6:28 PM. The Moon is a waxing crescent, 33% lit, and sets at 10:25 PM. The next full Moon is Monday, Oct 26. After dark, look for Saturn, bright in the east-southeast. A planet shines with a steady light where the stars around it twinkle. The Orionids meteor shower is active, peaking around Oct 21: at its peak, up to about 20 meteors an hour can be seen from a dark site. Cloud is forecast to cover most of the night, so the sky will be hard to see. The day is 11 hours 11 minutes long, 3 minutes shorter than yesterday.
As of 2:00 PM in Walker Mill, Maryland.
Air quality
Index 53, moderate, led by fine particles. Read at 2 PM from its reporting area, Northern Virginia and DC (DC), 7 miles off.
Good each day through Sun Oct 18, led by fine particles. Yesterday measured 23, good.
Little smoke near the ground through Sun 8 AM: the index from smoke stays at 6 or under.
Precipitation
0.06 in in the last 24 hours, and none in the 2 days before, to Fri 1 PM. Measured by radar and rain gauges, as water.
Visibility
Visibility stays 3 miles or more through Sun 8 AM, lowest 3 miles Sat 5 AM.
F
Now, today, and the week
On the radar over Walker Mill, MarylandReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture
The 7 instruments nearest Walker Mill, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.1 miles away.
measured now5 instruments
I-495 @ MD-4MD054
Beside a road/2.6 mi away/148 ft/74 ft below here
temp, pavement temp, wind, visibility, precip
Andrews AFBADW
At an airfield/4.5 mi away/282 ft/60 ft above here
temp, wind, gust, visibility, precip, pressure
Citizen station KB3PHDKB3PHD
In a volunteer observer's own ground/6.6 mi away/63 ft/159 ft below here
temp, humidity, wind, precip, pressure
Powder MillS2049
At a soil climate station/10.2 mi away/105 ft/117 ft below here
temp, humidity, soil temp, soil moisture
Pheasant Run - Patuxent Env RAWSPREM2
A remote fire weather station/13.1 mi away/215 ft/7 ft below here
temp, wind, gust, humidity, pressure
measured daily2 instruments
Forestville 0.5 EMD-PG-65
In a volunteer observer's own ground/2.1 mi away/268 ft/46 ft above here
precip, snowfall, snow depth
BeltsvilleBTVM2
At a cooperative observer's station/11.1 mi away/138 ft/84 ft below here
snowfall, snow depth, precip, high, low
Station report
The nearest airport reporting now, 4.5 mi from Walker Mill, Maryland. From its report of Oct 16, 2026, 1:55 PM local time: 3 of its 6 sheets.
Scattered at 1,300 ft; visibility 10 mi or more.
76.5 F with a dew point of 68.4 F, 76 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,900 ft up; the lowest cloud reported is at 1,300 ft.
From the south southwest (200 degrees) at 13 mph, gusting 18 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 20 mph.
The full report of Andrews AFB, in 6 sheets, each beside the Field Book plates that explain it
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Snow on the ground
21 places, each with its own forecast and its own instruments.
The nearest places, each with its own forecast and the instruments nearest it.