Coming up. Rain is likely this morning, from about 10 AM (80%).
Now. Long Island MacArthur Airport is 55° and mostly cloudy at 12 AM. The dew point is 49°, so the air feels dry and comfortable. Light breeze from the east-southeast at 5 mph.
Today and tonight. It warms to about 69° by 3 PM. Tonight falls to about 46° by 8 AM, under cloud.
The week. The warmest day ahead is Tuesday, near 64°, and the coolest tomorrow, near 54°. Rain is likely tomorrow (85%).
The sky tonight. The sun sets at 6:11 PM. The Moon is a waxing crescent, 33% lit, and sets at 10:02 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 8 minutes long, 3 minutes shorter than yesterday.
As of 12:00 AM in Long Island MacArthur Airport, New York.
Air quality
Index 15, good, led by fine particles. Read at 11 PM from its reporting area, Bridgeport (CT), 27 miles off.
Good each day through Today, led by fine particles. Yesterday measured 53, moderate.
Little smoke near the ground through Sat 8 PM: the index from smoke stays at 6 or under.
Precipitation
None in the last 24 hours; 0.03 in over the last 3 days, to Thu 11 PM. Measured by radar and rain gauges, as water.
Visibility
Dense fog: visibility falls to 0.1 miles Fri 11 AM, under a mile for 3 hours.
F
Now, today, and the week
| Runway | Length | Width | Surface | Heading, true | Wind along it now | Crosswind now |
|---|---|---|---|---|---|---|
| 06 / 24 | 7,006 ft | 150 ft | Asphalt | 45° / 225° | 0 mph head, on 06 | 3 mph from the right |
| 15L / 33R unlit | 3,175 ft | 75 ft | Asphalt | 135° / 315° | 3 mph head, on 15L | None |
| 15R / 33L | 5,186 ft | 150 ft | Asphalt | 135° / 315° | 3 mph head, on 15R | None |
Measured here
Every hour from Islip/Macarthur (ISP), Long Island MacArthur Airport's own instrument, measure by measure, on the field's own clock.
57 F at 11 PM Thursday; 65 F at its warmest, 2 PM Thursday, and 55 F at its coolest, 6 AM Thursday.
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
A dew point of 49 F, the air 75% saturated; the humidity ran from 43% at 3 PM Thursday to 77% at 8 PM Thursday.
How it is measured: Humidity variables, Field Book FB-WAT-002
3 mph from the southeast at 11 PM Thursday; at its strongest 14 mph, 9 AM Thursday, with a gust of 24 mph at 9 AM Thursday.
How it is measured: Coriolis as geometry, Field Book FB-ENG-008
30.14 inHg at 11 PM Thursday, falling 0.04 inHg over 3 hours; 0.11 inHg higher than a day before.
How it is measured: Hydrostatic balance, Field Book FB-ENG-003
10 miles or more every hour.
How it is measured: Fog types, Field Book FB-WAT-020
The lowest cloud base came down to 2,500 ft at 6 AM Thursday; a base was reported in 19 of the hours.
How it is measured: Cloud classification, Field Book FB-SKY-001
None measured in the gauge in the last 24 hours.
How it is measured: ASOS, Field Book FB-INS-002
Islip/Macarthur: every reading, the last 7 days, 30 days and the year, and how well it reports
The 5 instruments nearest Long Island MacArthur Airport, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.
measured now3 instruments
At an airfield/0.2 mi away/98 ft/1 ft below here
temp, wind, gust, visibility, precip, pressure
I-495 EB @ Rte 112NY001
Beside a road/5.1 mi away/89 ft/10 ft below here
temp, pavement temp, wind, visibility, precip
Watch Hill - Great Southern BayFIRN6
At a river or reservoir gauge/9.3 mi away/12 ft/87 ft below here
temp, wind, gust, humidity, pressure
measured daily2 instruments
Holbrook 0.6 NWNY-SF-43
In a volunteer observer's own ground/1.3 mi away/91 ft/8 ft below here
precip, snowfall, snow depth
St JamesSTJN6
At a cooperative observer's station/6.7 mi away/128 ft/29 ft above here
snowfall, snow depth, precip, high, low
-
Snow on the ground
29 places, each with its own forecast and its own instruments.
The nearest places, each with its own forecast and the instruments nearest it.