Track temp (est.)67°F20°CAsphalt/concrete in 512 W/m² sun
Dew point38°F3°C54% humidity
Barometer29.97inHg1015hPaFalling over 3 h
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°32°0° 0%Yellow flag
TomorrowNov 952°11°38°3° 0%Green flag
TueNov 1062°17°35°2° 0%Yellow flag
WedNov 1160°16°45°7° 34%Yellow flag
ThuNov 1253°12°41°5° 60%Red flag
FriNov 1340°4°34°1° 39%Red flag
SatNov 1442°6°30°-1° 9%Yellow flagpartial
Day
Flag
Sky
High / low
Rain
Gusts
Track temp
Density alt.
Sunrise · sunset
Today Nov 8
Yellow flagcold
Mostly clear
55°13°32°0°
0%
28 mph45 km/h WSW
67°20°
927 ft283 m
7:06 AM · 5:21 PM
Tomorrow Nov 9
Green flag
Overcast
52°11°38°3°
0%
17 mph28 km/h WNW
68°20°
512 ft156 m
7:07 AM · 5:20 PM
Tue Nov 10
Yellow flaggusty wind
Clear
62°17°35°2°
0%
28 mph45 km/h WSW
76°25°
1,400 ft427 m
7:08 AM · 5:19 PM
Wed Nov 11
Yellow flag34% chance of showers
Overcast
60°16°45°7°
34%
18 mph30 km/h SSW
74°23°
1,330 ft405 m
7:09 AM · 5:18 PM
Thu Nov 12
Red flag60% chance of rain
Heavy drizzle
53°12°41°5°
60% 0.61 in15.5 mm
37 mph59 km/h SSW
57°14°
1,397 ft426 m
7:11 AM · 5:18 PM
Fri Nov 13
Red flagsnow, gusty wind
Light snow
40°4°34°1°
39% 0.38 in9.6 mm
34 mph54 km/h NNW
38°4°
182 ft55 m
7:12 AM · 5:17 PM
Sat Nov 14
Yellow flaggusty wind, cold
Overcast
42°6°30°-1°
9%
33 mph53 km/h WNW
53°12°
186 ft57 m
7:13 AM · 5:16 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
54°12°
38°3°
54%
29.97 inHg1015 hPa
832 ft254 m
1.196
34
67°20°
17 mph27 km/h WSW · gusts 28 mph44 km/h
0%
55°13°
37°3°
52%
29.93 inHg1013 hPa
927 ft283 m
1.192
34
65°18°
16 mph26 km/h WSW · gusts 28 mph44 km/h
0%
54°12°
37°3°
51%
29.95 inHg1014 hPa
876 ft267 m
1.194
33
61°16°
15 mph24 km/h WSW · gusts 28 mph45 km/h
0%
51°11°
36°2°
56%
29.96 inHg1015 hPa
651 ft198 m
1.202
32
53°12°
11 mph17 km/h WSW · gusts 21 mph33 km/h
0%
48°9°
36°2°
63%
29.96 inHg1015 hPa
454 ft138 m
1.209
32
48°9°
10 mph16 km/h WSW · gusts 18 mph30 km/h
0%
47°8°
36°2°
66%
29.96 inHg1015 hPa
360 ft110 m
1.212
32
47°8°
9 mph15 km/h WSW · gusts 19 mph30 km/h
0%
46°8°
37°3°
73%
29.96 inHg1015 hPa
289 ft88 m
1.215
34
46°8°
10 mph15 km/h WSW · gusts 18 mph30 km/h
0%
44°7°
38°4°
80%
29.97 inHg1015 hPa
204 ft62 m
1.218
35
44°7°
8 mph13 km/h W · gusts 17 mph27 km/h
0%
43°6°
38°3°
82%
29.99 inHg1016 hPa
125 ft38 m
1.220
35
43°6°
8 mph13 km/h W · gusts 16 mph26 km/h
0%
42°6°
38°3°
85%
29.97 inHg1015 hPa
73 ft22 m
1.222
35
42°6°
7 mph12 km/h W · gusts 15 mph24 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 National Trail
Pit box, all week
Every forecast hour for the next seven days at National Trail: 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 National Trail, and a heads-up three days out.
Typical for November here: highs around 51°11°, lows 35°2°, rain on 24% of days.
Month by month
Average highs and lows, rain days, gusty days, freezing and hot days for all twelve months at National Trail, from 5 years of records. Part of Raceway Weather Pro.
ClearTemperature 48°9°Rain chance 0%Wind 10 mph16 km/hWSWTrack temperature 48°9°Density altitude 454 ft138 m
52°11° 38°3° 0%Green flag
53°12° 41°5° 60%Red flag
40°4° 34°1° 39%Red flag