NowOvercastTemperature 53°12°Rain chance 1%Wind 10 mph17 km/hNTrack temperature 67°19°
OvercastTemperature 54°12°Rain chance 1%Wind 9 mph15 km/hNTrack temperature 67°20°
OvercastTemperature 54°12°Rain chance 2%Wind 7 mph12 km/hNTrack temperature 63°17°
OvercastTemperature 52°11°Rain chance 2%Wind 6 mph9 km/hNWTrack temperature 56°13°
OvercastTemperature 48°9°Rain chance 2%Wind 6 mph10 km/hWNWTrack temperature 48°9°
OvercastTemperature 46°8°Rain chance 2%Wind 8 mph13 km/hWTrack temperature 46°8°
OvercastTemperature 46°8°Rain chance 2%Wind 9 mph14 km/hWSWTrack temperature 46°8°
OvercastTemperature 46°8°Rain chance 2%Wind 9 mph15 km/hWTrack temperature 46°8°
OvercastTemperature 46°8°Rain chance 2%Wind 11 mph18 km/hWTrack temperature 46°8°
OvercastTemperature 45°7°Rain chance 2%Wind 11 mph18 km/hWTrack temperature 45°7°
Partly cloudyTemperature 45°7°Rain chance 2%Wind 12 mph19 km/hWTrack temperature 45°7°
OvercastTemperature 44°7°Rain chance 2%Wind 11 mph18 km/hWTrack temperature 44°7°
OvercastTemperature 44°7°Rain chance 2%Wind 12 mph19 km/hWTrack temperature 44°7°
OvercastTemperature 45°7°Rain chance 2%Wind 12 mph20 km/hWSWTrack temperature 45°7°
OvercastTemperature 45°7°Rain chance 3%Wind 12 mph19 km/hWTrack temperature 45°7°
ClearTemperature 43°6°Rain chance 3%Wind 11 mph17 km/hWSWTrack temperature 43°6°
OvercastTemperature 43°6°Rain chance 3%Wind 11 mph17 km/hWSWTrack temperature 43°6°
ClearTemperature 43°6°Rain chance 4%Wind 11 mph17 km/hWSWTrack temperature 43°6°
ClearTemperature 43°6°Rain chance 4%Wind 8 mph13 km/hWSWTrack temperature 43°6°
Mostly clearTemperature 45°7°Rain chance 4%Wind 9 mph14 km/hWSWTrack temperature 48°9°
Partly cloudyTemperature 49°9°Rain chance 3%Wind 11 mph17 km/hWSWTrack temperature 55°13°
OvercastTemperature 52°11°Rain chance 2%Wind 9 mph15 km/hWSWTrack temperature 60°15°
OvercastTemperature 55°13°Rain chance 2%Wind 7 mph12 km/hWTrack temperature 64°18°
Partly cloudyTemperature 57°14°Rain chance 1%Wind 6 mph9 km/hWTrack temperature 71°22°
Hours in your time zone (the track's when they match). Track temperature is an estimate.
Pit box
The racer numbers
Density altitude183ft56mField elevation 509 ft
Air density1.218kg/m³99.5% of standard (RAD)
Water grains27grgrains per lb of dry air
Track temp (est.)67°F19°CAsphalt in 413 W/m² sun
Dew point32°F0°C45% humidity
Barometer30.02inHg1017hPaFalling over 3 h
Computed from the forecast air temperature, dew point and station pressure (NWS formulas). Track temperature is estimated from sun, wind and the surface; it is not a sensor reading. How these are figured.
This week
Day by day
TodayOct 3154°12°33°1° 3%Yellow flag
TomorrowNov 160°16°43°6° 4%Green flag
MonNov 257°14°42°5° 3%Green flag
TueNov 358°14°47°9° 3%Green flag
WedNov 462°17°44°6° 13%Green flag
ThuNov 564°18°46°8° 18%Green flag
FriNov 663°17°53°12° 25%Yellow flagpartial
Day
Flag
Sky
High / low
Rain
Gusts
Track temp
Density alt.
Sunrise · sunset
Today Oct 31
Yellow flagcold
Overcast
54°12°33°1°
3%
14 mph23 km/h WNW
67°20°
317 ft97 m
7:35 AM · 5:46 PM
Tomorrow Nov 1
Green flag
Overcast
60°16°43°6°
4%
15 mph24 km/h WSW
79°26°
661 ft201 m
6:37 AM · 4:45 PM
Mon Nov 2
Green flag
Overcast
57°14°42°5°
3%
11 mph17 km/h NW
72°22°
271 ft83 m
6:38 AM · 4:43 PM
Tue Nov 3
Green flag
Overcast
58°14°47°9°
3%
7 mph11 km/h NW
69°21°
552 ft168 m
6:40 AM · 4:42 PM
Wed Nov 4
Green flag
Overcast
62°17°44°6°
13%
17 mph27 km/h SW
77°25°
736 ft224 m
6:41 AM · 4:40 PM
Thu Nov 5
Green flag
Overcast
64°18°46°8°
18%
19 mph30 km/h SW
79°26°
955 ft291 m
6:43 AM · 4:39 PM
Fri Nov 6
Yellow flaggusty wind
Mostly clear
63°17°53°12°
25% 0.01 in0.3 mm
38 mph61 km/h WSW
78°26°
725 ft221 m
6:44 AM · 4:37 PM
Flags judge the racing hours, 9 am to 10 pm at the track. Days marked partial are at the edge of the forecast.
Today’s remaining 10 hours are free. Pro members get all seven days and the CSV.
Hour
Air
Dew pt
Humidity
Barometer
Density alt.
Air density kg/m³
Grains
Track temp (est.)
Wind
Rain
53°12°
32°0°
45%
30.02 inHg1017 hPa
183 ft56 m
1.218
27
67°19°
10 mph17 km/h N
1%
54°12°
32°0°
43%
30.01 inHg1016 hPa
283 ft86 m
1.215
27
67°20°
9 mph15 km/h N
1%
54°12°
32°0°
42%
30.00 inHg1016 hPa
317 ft97 m
1.214
26
63°17°
7 mph12 km/h N
2%
52°11°
31°0°
44%
29.98 inHg1015 hPa
201 ft61 m
1.218
26
56°13°
6 mph9 km/h NW
2%
48°9°
28°-2°
46%
29.97 inHg1015 hPa
-68 ft-21 m
1.227
23
48°9°
6 mph10 km/h WNW
2%
46°8°
29°-2°
50%
29.96 inHg1015 hPa
-178 ft-54 m
1.231
24
46°8°
8 mph13 km/h W
2%
46°8°
30°-1°
52%
29.95 inHg1014 hPa
-173 ft-53 m
1.231
24
46°8°
9 mph14 km/h WSW
2%
46°8°
30°-1°
52%
29.96 inHg1014 hPa
-165 ft-50 m
1.231
24
46°8°
9 mph15 km/h W
2%
46°8°
30°-1°
53%
29.95 inHg1014 hPa
-191 ft-58 m
1.232
24
46°8°
11 mph18 km/h W
2%
45°7°
29°-2°
52%
29.95 inHg1014 hPa
-231 ft-70 m
1.233
23
45°7°
11 mph18 km/h W
2%
Every hour from the forecast, the same arithmetic as the pit box above (NWS density-altitude formula; track temperature is an estimate). Hours in your time zone, the track’s when they match.
Raceway Weather Pro
Plan the whole week at Tri-City (WA)
Pit box, all week
Every forecast hour for the next seven days at Tri-City (WA): density altitude, air density, grains, track temp and more, with a CSV for the tuning laptop.
Do the models agree?
ECMWF, GFS and ICON side by side for the next three racing days, so you know when the forecast is shaky.
Next 6 hours of rain
Rain in 15-minute steps for the next six hours at your tracks, refreshed every hour.
Alerts for your tracks
An email the morning a red or yellow flag is due at Tri-City (WA), and a heads-up three days out.
OvercastTemperature 48°9°Rain chance 2%Wind 6 mph10 km/hWNWTrack temperature 48°9°
Partly cloudyTemperature 45°7°Rain chance 2%Wind 12 mph19 km/hWTrack temperature 45°7°
ClearTemperature 43°6°Rain chance 3%Wind 11 mph17 km/hWSWTrack temperature 43°6°
ClearTemperature 43°6°Rain chance 4%Wind 8 mph13 km/hWSWTrack temperature 43°6°
Partly cloudyTemperature 49°9°Rain chance 3%Wind 11 mph17 km/hWSWTrack temperature 55°13°