Temperature
67 F at 4 AM; 67 F at its warmest, 3 AM, and 52 F at its coolest, 8 AM Thursday.
- Now
- 67F
- 4 AM
- Highest
- 67F
- 3 AM
- Lowest
- 52F
- 8 AM Thursday
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
Now. Willow Run Airport is 66° and light rain at 5 AM. The dew point is 64°, so the air feels humid and sticky. Moderate breeze from the west at 16 mph.
Today and tonight. The warmest of the day has passed; it cools to about 48° by 8 PM. Tonight falls to about 35° by 8 AM, under a mostly clear sky. Frost can form on the ground in sheltered spots. Air quality is moderate (index 54): fine for most people, though people unusually sensitive to air pollution may feel it outdoors.
The week. The warmest day ahead is Tuesday, near 67°, and the coolest tomorrow, near 53°. The days ahead look dry. Frost is possible tomorrow morning, a low of 35°.
The sky tonight. The sun sets at 6:51 PM. The Moon is a waxing crescent, 33% lit, and sets at 10:39 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. The sky is forecast to stay clear: a good night to look up. The day is 11 hours 4 minutes long, 3 minutes shorter than yesterday.
As of 5:00 AM in Willow Run Airport, Michigan.
Air quality
Index 54, moderate, led by fine particles. Read at 4 AM from its reporting area, Southeast (MI), 20 miles off.
Good each day through Today, led by ozone. Yesterday measured 26, good.
No smoke near the ground through Sat 8 PM.
Precipitation
0.10 in in the last 24 hours, 0.14 in over the last 3 days, to Fri 4 AM. Measured by radar and rain gauges, as water.
Visibility
Visibility stays 5 miles or more through Sat 8 PM, lowest 5 miles Fri 7 PM.
F
Now, today, and the week
| Runway | Length | Width | Surface | Heading, true | Wind along it now | Crosswind now |
|---|---|---|---|---|---|---|
| 05 / 23 | 7,543 ft | 150 ft | Concrete | 47° / 227° | 13 mph head, on 23 | 8 mph from the right |
| 09 / 27 | 5,001 ft | 100 ft | Asphalt | 89° / 269° | 15 mph head, on 27 | 2 mph from the left |
Measured here
Every hour from Detroit/Willow (YIP), Willow Run Airport's own instrument, measure by measure, on the field's own clock.
67 F at 4 AM; 67 F at its warmest, 3 AM, and 52 F at its coolest, 8 AM Thursday.
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
A dew point of 64 F, the air 92% saturated; the humidity ran from 69% at 12 PM Thursday to 97% at 2 AM.
How it is measured: Humidity variables, Field Book FB-WAT-002
15 mph from the west at 4 AM; at its strongest 15 mph, 4 AM, with a gust of 32 mph at 4 AM.
How it is measured: Coriolis as geometry, Field Book FB-ENG-008
29.69 inHg at 4 AM, steady over 3 hours; 0.54 inHg lower than a day before.
How it is measured: Hydrostatic balance, Field Book FB-ENG-003
Down to 3 miles at 10 PM Thursday; 3 miles now.
How it is measured: Fog types, Field Book FB-WAT-020
The lowest cloud base came down to 600 ft at 1 AM; a base was reported in 23 of the hours.
How it is measured: Cloud classification, Field Book FB-SKY-001
0.22 in measured in the gauge, the most, 0.13 in, in the hour to 10 PM Thursday.
How it is measured: ASOS, Field Book FB-INS-002
Detroit/Willow: every reading, the last 7 days, 30 days and the year, and how well it reports
The 5 instruments nearest Willow Run 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 now3 instruments
At an airfield/0.0 mi away/705 ft/11 ft below here
temp, wind, gust, visibility, precip, pressure
M-11MC135
Beside a road/1.4 mi away/699 ft/17 ft below here
temp, pavement temp, wind, visibility, precip
Adrian [CCOOP]ARNM4
At a river or reservoir gauge/33.4 mi away/738 ft/22 ft above here
temp, wind, gust, humidity, pressure
measured daily2 instruments
Ypsilanti 2.5 ESEMI-WS-79
In a volunteer observer's own ground/2.5 mi away/729 ft/13 ft above here
precip, snowfall, snow depth
Ann Arbor SEAASM4
At a cooperative observer's station/8.3 mi away/840 ft/124 ft above here
snowfall, snow depth, precip, high, low
0in
Snow on the ground
Measured at Ann Arbor SE (AASM4), 8.3 miles from here, read 15 Oct, 07:30. measured daily
66 places, each with its own forecast and its own instruments.
The nearest places, each with its own forecast and the instruments nearest it.