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 854°12°43°6° 0%Yellow flag
TomorrowNov 950°10°37°3° 1%Yellow flag
TueNov 1059°15°36°2° 0%Yellow flag
WedNov 1158°15°41°5° 6%Green flag
ThuNov 1253°11°46°8° 76%Red flag
FriNov 1346°8°36°2° 62%Red flag
SatNov 1437°3°35°2° 40%Red flagpartial
Day
Flag
Sky
High / low
Rain
Gusts
Track temp
Density alt.
Sunrise · sunset
Today Nov 8
Yellow flaggusty wind
Overcast
54°12°43°6°
0%
28 mph45 km/h WSW
68°20°
1,276 ft389 m
6:54 AM · 5:08 PM
Tomorrow Nov 9
Yellow flaggusty wind
Overcast
50°10°37°3°
1%
26 mph41 km/h W
60°16°
833 ft254 m
6:55 AM · 5:07 PM
Tue Nov 10
Yellow flaggusty wind
Overcast
59°15°36°2°
0%
32 mph51 km/h SW
73°23°
1,555 ft474 m
6:57 AM · 5:06 PM
Wed Nov 11
Green flag
Overcast
58°15°41°5°
6%
9 mph14 km/h SSW
73°23°
1,564 ft477 m
6:58 AM · 5:05 PM
Thu Nov 12
Red flag68% chance of rain
Showers
53°11°46°8°
76% 0.45 in11.5 mm
26 mph42 km/h S
57°14°
1,790 ft546 m
6:59 AM · 5:04 PM
Fri Nov 13
Red flagsnow, 47% chance of showers
Snow
46°8°36°2°
62% 0.15 in3.9 mm
23 mph36 km/h WNW
42°6°
1,092 ft333 m
7:00 AM · 5:03 PM
Sat Nov 14
Red flagsnow, cold
Snow
37°3°35°2°
40% 0.2 in5.1 mm
29 mph47 km/h WNW
40°4°
463 ft141 m
7:01 AM · 5:02 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°
33°1°
45%
29.89 inHg1012 hPa
1,242 ft379 m
1.181
29
68°20°
15 mph25 km/h WSW · gusts 24 mph39 km/h
0%
54°12°
32°0°
42%
29.88 inHg1012 hPa
1,276 ft389 m
1.180
27
65°19°
15 mph24 km/h SW · gusts 25 mph40 km/h
0%
53°12°
31°-1°
42%
29.89 inHg1012 hPa
1,208 ft368 m
1.182
26
60°15°
13 mph21 km/h WSW · gusts 26 mph42 km/h
0%
50°10°
31°0°
49%
29.91 inHg1013 hPa
954 ft291 m
1.191
27
50°10°
9 mph14 km/h SW · gusts 20 mph32 km/h
0%
47°9°
33°0°
56%
29.92 inHg1013 hPa
804 ft245 m
1.196
28
47°9°
9 mph15 km/h SW · gusts 18 mph28 km/h
0%
46°8°
33°1°
61%
29.92 inHg1013 hPa
722 ft220 m
1.199
29
46°8°
10 mph16 km/h SW · gusts 22 mph36 km/h
0%
46°8°
34°1°
65%
29.92 inHg1013 hPa
684 ft208 m
1.201
30
46°8°
10 mph16 km/h SW · gusts 22 mph35 km/h
0%
45°7°
35°1°
67%
29.93 inHg1014 hPa
622 ft190 m
1.203
31
45°7°
11 mph17 km/h SW · gusts 22 mph35 km/h
0%
46°8°
35°2°
67%
29.94 inHg1014 hPa
676 ft206 m
1.201
32
46°8°
11 mph18 km/h SW · gusts 22 mph35 km/h
0%
45°7°
35°2°
68%
29.92 inHg1013 hPa
663 ft202 m
1.201
31
45°7°
11 mph18 km/h SW · gusts 28 mph45 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 Keystone
Pit box, all week
Every forecast hour for the next seven days at Keystone: 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 Keystone, and a heads-up three days out.
Typical for November here: highs around 51°11°, lows 35°2°, rain on 37% of days.
Month by month
Average highs and lows, rain days, gusty days, freezing and hot days for all twelve months at Keystone, from 5 years of records. Part of Raceway Weather Pro.
ClearTemperature 47°9°Rain chance 0%Wind 9 mph15 km/hSWTrack temperature 47°9°Density altitude 804 ft245 m
OvercastTemperature 46°8°Rain chance 0%Wind 11 mph18 km/hSWTrack temperature 46°8°Density altitude 676 ft206 m
Partly cloudyTemperature 45°7°Rain chance 0%Wind 10 mph16 km/hWSWTrack temperature 45°7°Density altitude 678 ft207 m
OvercastTemperature 44°7°Rain chance 0%Wind 9 mph15 km/hWTrack temperature 44°7°Density altitude 520 ft158 m
53°11° 46°8° 76%Red flag
46°8° 36°2° 62%Red flag