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Harry P Williams Memorial Airport, Louisiana

Small airport in St. Mary Parish, Louisiana

Air quality

The air at Harry P Williams Memorial Airport

Index 35, good, led by fine particles. Read at 1 AM from its reporting area, Thibodaux (LA), 35 miles off.

35Good
  • Fine particles (PM2.5)35Good-
  • Ozone12Good-

The days ahead

Highest 51, moderate, today, led by ozone. Yesterday measured 45, good.

Smoke, the next 42 hours

Little smoke near the ground through Sat 7 PM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Harry P Williams Memorial Airport

None in the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

How far you can see at Harry P Williams Memorial Airport, the next 42 hours

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

FriSat

Airfield

Code
PTN
ICAO
KPTN
IATA
PTN
Field elevation
9 ft
Serves
Patterson
Kind
Small airport
Scheduled service
No
Its own instrument
PTN
Wind now
Calm, read 16 Oct, 01:56

Runways

RunwayLengthWidthSurfaceHeading, trueWind along it nowCrosswind now
04W / 22W unlit4,500 ft100 ftWater54° / 234°CalmCalm
06 / 245,399 ft150 ftAsphalt59° / 239°CalmCalm
04W22W06242,000 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 Patterson Memorial (PTN), Harry P Williams Memorial Airport's own instrument, measure by measure, on the field's own clock.

Temperature

68 F at 1 AM; 88 F at its warmest, 2 PM Thursday, and 67 F at its coolest, 6 AM Thursday.

Now
68F
1 AM
Highest
88F
2 PM Thursday
Lowest
67F
6 AM Thursday
Temperature and Dew point at Patterson Memorial, temperature from 67.0 to 88.0, the latest 68.0; dew point from 63.0 to 73.0, the latest 67.0, in degrees Fahrenheit.TEMPERATURE AND DEW POINTF607080903 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16TEMPERATUREDEW POINT

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

Humidity and dew point

A dew point of 67 F, the air 97% saturated; the humidity ran from 43% at 2 PM Thursday to 99% at 7 AM Thursday.

Dew point now
67F
1 AM
Humidity now
97%
Humidity, range
43 to 99%
Relative humidity at Patterson Memorial, relative humidity from 43 to 99, the latest 97, in per cent.RELATIVE HUMIDITY%4060801003 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16

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

Wind

Calm at 1 AM; at its strongest 8 mph, 10 AM Thursday, and no gust reported.

Now
0mph
calm
Strongest
8mph
10 AM Thursday
Highest gust
-
none reported
Wind at Patterson Memorial, wind from 0 to 8, the latest 0, in miles an hour.WINDmph02.557.5103 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16
Wind direction at Patterson Memorial, wind direction from 30 to 330, the latest 330, in degrees.WIND DIRECTION°0901802703603 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16

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

Pressure

30.07 inHg at 1 AM, steady over 3 hours; 0.02 inHg higher than a day before.

Now
30.07inHg
1 AM
3 hours
+0.00inHg
steady
24 hours
+0.02inHg
Pressure, altimeter at Patterson Memorial, pressure, altimeter from 30.02 to 30.10, the latest 30.07, in inches of mercury.PRESSURE, ALTIMETERinHg30.0030.0230.0530.0730.103 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16

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

Visibility

Down to 0.5 miles at 3 AM Thursday, under a mile for 4 hours; 10 miles or more now.

Now
10+mi
Lowest
0.5mi
3 AM Thursday
Hours under a mile
4
Visibility at Patterson Memorial, visibility from 0.5 to 10.0, the latest 10.0, in miles.VISIBILITYmi02.557.5103 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16LIFRIFRMVFRVFR

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

Cloud base

The lowest cloud base came down to 200 ft at 3 AM Thursday; a base was reported in 11 of the hours.

Lowest base now
-
Lowest in 24 hours
200ft
3 AM Thursday
Hours with a base reported
11
Lowest cloud base at Patterson Memorial, lowest cloud base from 200 to 5,000, the latest 5,000, in feet.LOWEST CLOUD BASEft02,0004,0006,0003 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16MVFRVFR

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

Precipitation

0.01 in measured in the gauge, the most, 0.01 in, in the hour to 7 AM Thursday.

Last 24 hours
0.01in
Wettest hour
0.01in
7 AM Thursday
Hours with some
1
Precipitation at Patterson Memorial, precipitation from 0.00 to 0.01, the latest 0.00, in inches.PRECIPITATIONin0.000.030.050.070.103 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16

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

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

What is measuring near here

The 3 instruments nearest Harry P Williams Memorial Airport, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.0 miles away.

measured now1 instrument

Patterson MemorialPTN

At an airfield/0.0 mi away/10 ft/1 ft above here

temp, wind, gust, visibility, precip, pressure

measured daily2 instruments

Baldwin 1.8 NLA-MY-3

In a volunteer observer's own ground/16.6 mi away/8 ft/1 ft below here

precip, snowfall, snow depth

NapoleonvilleNAPL1

At a cooperative observer's station/24.8 mi away/33 ft/24 ft above here

snowfall, snow depth, precip, high, low

-

Snow on the ground

Elsewhere in Louisiana

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

Near Harry P Williams Memorial Airport

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

Near Harry P Williams Memorial Airport