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 853°12°43°6° 89%Yellow flag
TomorrowNov 956°13°41°5° 11%Green flag
TueNov 1055°13°39°4° 1%Yellow flag
WedNov 1153°12°40°4° 0%Green flag
ThuNov 1251°11°37°3° 30%Yellow flag
FriNov 1351°11°43°6° 59%Red flag
SatNov 1450°10°43°6° 36%Green flagpartial
Day
Flag
Sky
High / low
Rain
Gusts
Track temp
Density alt.
Sunrise · sunset
Today Nov 8
Yellow flaggusty wind
Overcast
53°12°43°6°
89% 0.14 in3.6 mm
36 mph58 km/h WNW
63°17°
174 ft53 m
6:26 AM · 4:29 PM
Tomorrow Nov 9
Green flag
Overcast
56°13°41°5°
11%
23 mph37 km/h W
66°19°
418 ft127 m
6:28 AM · 4:28 PM
Tue Nov 10
Yellow flaggusty wind
Overcast
55°13°39°4°
1%
28 mph44 km/h W
63°17°
167 ft51 m
6:29 AM · 4:27 PM
Wed Nov 11
Green flag
Overcast
53°12°40°4°
0%
26 mph42 km/h WNW
64°18°
-55 ft-17 m
6:30 AM · 4:26 PM
Thu Nov 12
Yellow flag30% chance of showers
Overcast
51°11°37°3°
30% 0.02 in0.4 mm
19 mph30 km/h ENE
60°16°
-129 ft-39 m
6:31 AM · 4:24 PM
Fri Nov 13
Red flagrain, gusty wind
Heavy rain
51°11°43°6°
59% 1.77 in45 mm
50 mph80 km/h ENE
51°11°
639 ft195 m
6:33 AM · 4:23 PM
Sat Nov 14
Green flag
Drizzle
50°10°43°6°
36% 0.12 in3 mm
23 mph38 km/h W
55°13°
499 ft152 m
6:34 AM · 4:23 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
53°12°
42°6°
67%
29.67 inHg1005 hPa
174 ft53 m
1.219
40
62°16°
12 mph19 km/h WNW · gusts 25 mph41 km/h
0%
52°11°
43°6°
70%
29.67 inHg1005 hPa
132 ft40 m
1.220
41
56°14°
9 mph15 km/h WNW · gusts 20 mph33 km/h
0%
50°10°
41°5°
72%
29.68 inHg1005 hPa
-45 ft-14 m
1.227
39
52°11°
8 mph12 km/h W · gusts 23 mph37 km/h
0%
47°9°
42°5°
80%
29.69 inHg1005 hPa
-223 ft-68 m
1.233
39
47°9°
5 mph7 km/h WSW
0%
46°8°
42°6°
85%
29.69 inHg1005 hPa
-307 ft-94 m
1.236
40
46°8°
4 mph6 km/h WSW
0%
45°7°
41°5°
86%
29.69 inHg1005 hPa
-380 ft-116 m
1.239
39
45°7°
4 mph6 km/h SW
0%
45°7°
40°5°
84%
29.69 inHg1005 hPa
-408 ft-124 m
1.240
37
45°7°
5 mph7 km/h SW · gusts 13 mph20 km/h
1%
44°7°
39°4°
83%
29.69 inHg1005 hPa
-478 ft-146 m
1.242
35
44°7°
5 mph9 km/h SW · gusts 13 mph20 km/h
2%
43°6°
38°3°
82%
29.67 inHg1005 hPa
-514 ft-157 m
1.244
34
43°6°
6 mph9 km/h SW
2%
43°6°
38°3°
83%
29.66 inHg1005 hPa
-512 ft-156 m
1.244
34
43°6°
5 mph8 km/h SW · gusts 13 mph21 km/h
6%
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 Epping
Pit box, all week
Every forecast hour for the next seven days at Epping: 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 Epping, and a heads-up three days out.
Typical for November here: highs around 50°10°, lows 34°1°, rain on 23% of days.
Month by month
Average highs and lows, rain days, gusty days, freezing and hot days for all twelve months at Epping, from 5 years of records. Part of Raceway Weather Pro.
Partly cloudyTemperature 52°11°Rain chance 0%Wind 9 mph15 km/hWNWTrack temperature 56°14°Density altitude 132 ft40 m
ClearTemperature 47°9°Rain chance 0%Wind 5 mph7 km/hWSWTrack temperature 47°9°Density altitude -223 ft-68 m
Partly cloudyTemperature 45°7°Rain chance 0%Wind 4 mph6 km/hSWTrack temperature 45°7°Density altitude -380 ft-116 m
OvercastTemperature 43°6°Rain chance 6%Wind 5 mph8 km/hSWTrack temperature 43°6°Density altitude -512 ft-156 m
OvercastTemperature 43°6°Rain chance 4%Wind 6 mph10 km/hWSWTrack temperature 43°6°Density altitude -464 ft-141 m
51°11° 43°6° 59%Red flag
50°10° 43°6° 36%Green flagpartial