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Clara Barton National Historic Site, Maryland

National Historic Site in Montgomery County, Maryland

Air quality

The air at Clara Barton National Historic Site

Index 28, good, led by fine particles. Read at 12 AM from its reporting area, Northern Virginia and DC (DC), 8 miles off.

28Good
  • Fine particles (PM2.5)28Good10.1 mi
  • Ozone20Good12 ppb6.6 mi
  • Nitrogen dioxide4Good4.2 ppb7.6 mi
  • Sulfur dioxide0Good0 ppb15.2 mi
  • Carbon monoxide-0.3 ppm7.6 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 56, moderate.

Smoke, the next 45 hours

Little smoke near the ground through Sat 8 PM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Clara Barton National Historic Site

0.04 in in the last 24 hours, and none in the 2 days before, to Thu 11 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.04in
Last 3 days
0.04in

Visibility

How far you can see at Clara Barton National Historic Site, the next 45 hours

Visibility stays 4 miles or more through Sat 8 PM, lowest 5 miles Fri 7 PM.

FriSat

Park

Designation
National Historic Site
Area
321,000 sq ft
Height at its point
126 ft
County
Montgomery County
State
Maryland
Latitude
38.9677° N
Longitude
77.1404° W

What is measuring near here

The 7 instruments nearest Clara Barton National Historic Site, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.1 miles away.

measured now5 instruments

Citizen station FW3819FW3819

In a volunteer observer's own ground/1.0 mi away/175 ft/49 ft above here

temp, humidity, wind, precip, pressure

College ParkCGS

At an airfield/11.7 mi away/48 ft/78 ft below here

temp, wind, gust, visibility, precip, pressure

Powder MillS2049

At a soil climate station/16.0 mi away/105 ft/21 ft below here

temp, humidity, soil temp, soil moisture

measured daily2 instruments

Glen Echo 0.1 SEMD-MG-121

In a volunteer observer's own ground/0.1 mi away/131 ft/5 ft above here

precip, snowfall, snow depth

BeltsvilleBTVM2

At a cooperative observer's station/14.5 mi away/138 ft/12 ft above here

snowfall, snow depth, precip, high, low

-

Snow on the ground

Elsewhere in Maryland

21 places, each with its own forecast and its own instruments.

Near Clara Barton National Historic Site

The nearest places, each with its own forecast and the instruments nearest it.

Near Clara Barton National Historic Site