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Allentown Queen City Municipal Airport, Pennsylvania

Small airport in Lehigh County, Pennsylvania

Air quality

The air at Allentown Queen City Municipal Airport

Index 19, good, led by fine particles. Read at 9 AM from its reporting area, Lehigh Valley (PA), 6 miles off.

19Good
  • Fine particles (PM2.5)19Good4.2 mi
  • Ozone17Good10 ppb4.2 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 31, good.

Smoke, the next 42 hours

Little smoke near the ground through Sun 2 AM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Allentown Queen City Municipal Airport

0.03 in in the last 24 hours, 0.06 in over the last 3 days, to Fri 8 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.03in
Last 3 days
0.06in

Visibility

How far you can see at Allentown Queen City Municipal Airport, the next 42 hours

Visibility stays 6 miles or more through Sun 2 AM, lowest 6 miles Fri 9 AM.

FriSat

Airfield

Code
XLL
ICAO
KXLL
IATA
-
Field elevation
399 ft
Serves
Allentown
Kind
Small airport
Scheduled service
No
Its own instrument
XLL
Wind now
Calm, read 16 Oct, 09:35

Runways

RunwayLengthWidthSurfaceHeading, trueWind along it nowCrosswind now
07 / 253,950 ft75 ftAsphalt59° / 239°CalmCalm
15 / 333,160 ft75 ftAsphalt135° / 315°CalmCalm
072515331,000 ftN
Runways from their surveyed ends, north up, lengths and positions to scale.

Measured here

What the airfield's own instrument measured, the last 24 hours

Every hour from Allentown (XLL), Allentown Queen City Municipal Airport's own instrument, measure by measure, on the field's own clock.

Temperature

59 F at 9 AM; 68 F at its warmest, 3 PM Thursday, and 55 F at its coolest, 3 AM.

Now
59F
9 AM
Highest
68F
3 PM Thursday
Lowest
55F
3 AM
Temperature and Dew point at Allentown, temperature from 55.4 to 68.0, the latest 59.0; dew point from 46.4 to 58.1, the latest 58.1, in degrees Fahrenheit.TEMPERATURE AND DEW POINTF4050607012 PM3 PM6 PM9 PMOct 163 AM6 AM9 AMTEMPERATUREDEW POINT

How it is measured: Stevenson screen and siting, Field Book FB-INS-009

Humidity and dew point

A dew point of 58 F, the air 97% saturated; the humidity ran from 48% at 3 PM Thursday to 100% at 5 AM.

Dew point now
58F
9 AM
Humidity now
97%
Humidity, range
48 to 100%
Relative humidity at Allentown, relative humidity from 48 to 100, the latest 97, in per cent.RELATIVE HUMIDITY%40608010012 PM3 PM6 PM9 PMOct 163 AM6 AM9 AM

How it is measured: Humidity variables, Field Book FB-WAT-002

Wind

Calm at 9 AM; at its strongest 9 mph, 8 PM Thursday, and no gust reported.

Now
0mph
calm
Strongest
9mph
8 PM Thursday
Highest gust
-
none reported
Wind at Allentown, wind from 0 to 9, the latest 0, in miles an hour.WINDmph02.557.51012 PM3 PM6 PM9 PMOct 163 AM6 AM9 AM
Wind direction at Allentown, wind direction from 150 to 160, the latest 150, in degrees.WIND DIRECTION°09018027036012 PM3 PM6 PM9 PMOct 163 AM6 AM9 AM

How it is measured: Coriolis as geometry, Field Book FB-ENG-008

Pressure

29.89 inHg at 9 AM, falling 0.06 inHg over 3 hours; 0.36 inHg lower than a day before.

Now
29.89inHg
9 AM
3 hours
-0.06inHg
falling
24 hours
-0.36inHg
Pressure, altimeter at Allentown, pressure, altimeter from 29.89 to 30.25, the latest 29.89, in inches of mercury.PRESSURE, ALTIMETERinHg29.8029.9030.0030.1030.2030.3012 PM3 PM6 PM9 PMOct 163 AM6 AM9 AM

How it is measured: Hydrostatic balance, Field Book FB-ENG-003

Visibility

Down to 2 miles at 8 AM; 3 miles now.

Now
3mi
Lowest
2mi
8 AM
Hours under a mile
0
Visibility at Allentown, visibility from 2.0 to 10.0, the latest 2.5, in miles.VISIBILITYmi02.557.51012 PM3 PM6 PM9 PMOct 163 AM6 AM9 AMLIFRIFRMVFRVFR

How it is measured: Fog types, Field Book FB-WAT-020

Cloud base

The lowest cloud base came down to 300 ft at 7 AM; a base was reported in 17 of the hours.

Lowest base now
300ft
Lowest in 24 hours
300ft
7 AM
Hours with a base reported
17
Lowest cloud base at Allentown, lowest cloud base from 300 to 8,000, the latest 300, in feet.LOWEST CLOUD BASEft02,0004,0006,0008,00012 PM3 PM6 PM9 PMOct 163 AM6 AM9 AMMVFRVFR

How it is measured: Cloud classification, Field Book FB-SKY-001

Precipitation

0.05 in measured in the gauge, the most, 0.04 in, in the hour to 6 AM.

Last 24 hours
0.05in
Wettest hour
0.04in
6 AM
Hours with some
2
Precipitation at Allentown, precipitation from 0.00 to 0.04, the latest 0.00, in inches.PRECIPITATIONin0.000.030.050.070.1012 PM3 PM6 PM9 PMOct 163 AM6 AM9 AM

How it is measured: ASOS, Field Book FB-INS-002

Allentown: every reading, the last 7 days, 30 days and the year, and how well it reports

What is measuring near here

The 5 instruments nearest Allentown Queen City Municipal Airport, 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 now3 instruments

AllentownXLL

At an airfield/0.1 mi away/400 ft/1 ft above here

temp, wind, gust, visibility, precip, pressure

SR33 & Wind GapPA037

Beside a road/22.5 mi away/984 ft/585 ft above here

temp, pavement temp, wind, visibility, precip

measured daily2 instruments

Allentown 0.9 SPA-LH-37

In a volunteer observer's own ground/1.0 mi away/344 ft/55 ft below here

precip, snowfall, snow depth

SpringtownSPRP1

At a cooperative observer's station/10.7 mi away/797 ft/398 ft above here

snowfall, snow depth, precip, high, low

-

Snow on the ground

Elsewhere in Pennsylvania

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

Near Allentown Queen City Municipal Airport

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

Near Allentown Queen City Municipal Airport