Wind on the strip—The strip’s direction is not mapped
Computed from the forecast air temperature, dew point and station pressure (NWS formulas; the correction factor by SAE J1349 and the older 60 °F STD standard). 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
TodayNov 855°13°36°2° 1%Yellow flag
TomorrowNov 953°12°40°4° 4%Green flag
TueNov 1060°16°42°6° 4%Green flag
WedNov 1156°14°44°7° 25%Yellow flag
ThuNov 1244°7°35°2° 21%Yellow flag
FriNov 1340°5°32°0° 5%Yellow flag
SatNov 1441°5°31°-1° 0%Yellow flagpartial
Day
Flag
Sky
High / low
Rain
Gusts
Track temp
Density alt.
Sunrise · sunset
Today Nov 8
Yellow flaggusty wind
Fog
55°13°36°2°
1%
30 mph49 km/h WSW
65°18°
864 ft263 m
7:24 AM · 5:28 PM
Tomorrow Nov 9
Green flag
Overcast
53°12°40°4°
4%
17 mph28 km/h WNW
67°19°
550 ft168 m
7:25 AM · 5:27 PM
Tue Nov 10
Green flag
Partly cloudy
60°16°42°6°
4%
19 mph31 km/h W
78°26°
1,109 ft338 m
7:26 AM · 5:26 PM
Wed Nov 11
Yellow flag25% chance of a shower
Light rain
56°14°44°7°
25% 0.29 in7.3 mm
24 mph39 km/h E
65°18°
1,015 ft309 m
7:28 AM · 5:25 PM
Thu Nov 12
Yellow flaggusty wind
Light drizzle
44°7°35°2°
21% 0.47 in11.9 mm
33 mph53 km/h NNE
49°9°
175 ft53 m
7:29 AM · 5:24 PM
Fri Nov 13
Yellow flaggusty wind, cold
Overcast
40°5°32°0°
5%
31 mph50 km/h N
53°12°
-93 ft-28 m
7:30 AM · 5:23 PM
Sat Nov 14
Yellow flagcold
Overcast
41°5°31°-1°
0%
25 mph40 km/h NW
46°8°
-53 ft-16 m
7:31 AM · 5:22 PM
Flags judge the racing hours: 9 am to 10 pm at the track for a drag strip. National Weather Service alerts raise them. Days marked partial are at the edge of the forecast. How the flags work
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
52°11°
45°7°
77%
29.88 inHg1012 hPa
724 ft221 m
1.199
46
61°16°
17 mph27 km/h W · gusts 26 mph42 km/h
0%
54°12°
44°7°
68%
29.88 inHg1012 hPa
864 ft263 m
1.194
44
65°18°
16 mph25 km/h W · gusts 26 mph42 km/h
0%
55°13°
42°5°
62%
29.90 inHg1013 hPa
850 ft259 m
1.195
40
62°17°
14 mph23 km/h W · gusts 26 mph42 km/h
0%
52°11°
39°4°
62%
29.90 inHg1013 hPa
676 ft206 m
1.201
37
55°13°
11 mph18 km/h W · gusts 20 mph32 km/h
0%
48°9°
41°5°
76%
29.91 inHg1013 hPa
420 ft128 m
1.210
39
48°9°
8 mph14 km/h W · gusts 16 mph26 km/h
0%
46°8°
40°4°
78%
29.91 inHg1013 hPa
308 ft94 m
1.214
37
46°8°
7 mph12 km/h WNW · gusts 18 mph28 km/h
0%
46°8°
39°4°
78%
29.91 inHg1013 hPa
263 ft80 m
1.216
37
46°8°
8 mph12 km/h WNW · gusts 18 mph28 km/h
0%
44°7°
38°3°
79%
29.93 inHg1014 hPa
130 ft40 m
1.220
35
44°7°
7 mph12 km/h WNW · gusts 18 mph29 km/h
0%
44°7°
38°4°
81%
29.96 inHg1014 hPa
67 ft20 m
1.223
35
44°7°
7 mph11 km/h NW · gusts 18 mph28 km/h
0%
43°6°
38°3°
82%
29.95 inHg1014 hPa
13 ft4 m
1.224
34
43°6°
7 mph11 km/h NW · gusts 17 mph27 km/h
0%
Every hour from the forecast, the same arithmetic as the pit box above (NWS density-altitude formula; track temperature is an estimate). Hours are track time.
Raceway Weather Pro
Plan the whole week at US 131
Pit box, all week
Every forecast hour for the next seven days at US 131: 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 US 131, and a heads-up three days out.
Typical for November here: highs around 47°9°, lows 34°1°, rain on 33% of days.
Month by month
Average highs and lows, rain days, gusty days, freezing and hot days for all twelve months at US 131, from 5 years of records. Part of Raceway Weather Pro.
ClearTemperature 54°12°Rain chance 0%Wind 16 mph25 km/hWTrack temperature 65°18°Density altitude 864 ft263 m
ClearTemperature 48°9°Rain chance 0%Wind 8 mph14 km/hWTrack temperature 48°9°Density altitude 420 ft128 m
OvercastTemperature 43°6°Rain chance 0%Wind 7 mph11 km/hNWTrack temperature 43°6°Density altitude 13 ft4 m
Partly cloudyTemperature 46°8°Rain chance 0%Wind 6 mph10 km/hNNWTrack temperature 46°8°Density altitude 167 ft51 m
55°13° 36°2° 1%Yellow flag
60°16° 42°6° 4%Green flag
56°14° 44°7° 25%Yellow flag
44°7° 35°2° 21%Yellow flag