- Track temp
- 85°F30°C
- Rain chance
- 0%
- Wind
- 2mph4km/hSSE
- Density alt.
- 5,640ft1,719m
- Barometer 30.26 inHg1025 hPa falling
- Humidity 35%
Forecast updated · Open-Meteo
Hour by hour
ClearTemperature 57°14°Rain chance 0%Wind 2 mph4 km/hSSETrack temperature 85°30°Density altitude 5,640 ft1,719 mClearTemperature 59°15°Rain chance 0%Wind 1 mph1 km/hSSETrack temperature 90°32°Density altitude 5,806 ft1,770 mClearTemperature 61°16°Rain chance 0%Wind 1 mph2 km/hNTrack temperature 87°31°Density altitude 5,872 ft1,790 mClearTemperature 61°16°Rain chance 0%Wind 4 mph6 km/hNNWTrack temperature 79°26°Density altitude 5,935 ft1,809 mClearTemperature 59°15°Rain chance 0%Wind 7 mph12 km/hNWTrack temperature 68°20°Density altitude 5,857 ft1,785 mClearTemperature 54°12°Rain chance 0%Wind 6 mph9 km/hNWTrack temperature 54°12°Density altitude 5,578 ft1,700 m
ClearTemperature 50°10°Rain chance 0%Wind 5 mph8 km/hNWTrack temperature 50°10°Density altitude 5,348 ft1,630 mClearTemperature 48°9°Rain chance 0%Wind 1 mph2 km/hWTrack temperature 48°9°Density altitude 5,233 ft1,595 mClearTemperature 46°8°Rain chance 0%Wind 1 mph1 km/hNNETrack temperature 46°8°Density altitude 5,141 ft1,567 mClearTemperature 45°7°Rain chance 0%Wind 1 mph1 km/hSETrack temperature 45°7°Density altitude 5,081 ft1,549 mClearTemperature 44°7°Rain chance 0%Wind 4 mph6 km/hETrack temperature 44°7°Density altitude 5,040 ft1,536 mClearTemperature 43°6°Rain chance 0%Wind 4 mph7 km/hESETrack temperature 43°6°Density altitude 4,979 ft1,518 mClearTemperature 43°6°Rain chance 0%Wind 3 mph5 km/hESETrack temperature 43°6°Density altitude 4,941 ft1,506 mClearTemperature 42°6°Rain chance 0%Wind 3 mph5 km/hESETrack temperature 42°6°Density altitude 4,912 ft1,497 mClearTemperature 41°5°Rain chance 0%Wind 5 mph8 km/hSETrack temperature 41°5°Density altitude 4,859 ft1,481 mClearTemperature 41°5°Rain chance 0%Wind 6 mph10 km/hESETrack temperature 41°5°Density altitude 4,850 ft1,478 mClearTemperature 40°4°Rain chance 0%Wind 8 mph12 km/hESETrack temperature 40°4°Density altitude 4,813 ft1,467 m
Partly cloudyTemperature 39°4°Rain chance 0%Wind 8 mph13 km/hESETrack temperature 39°4°Density altitude 4,726 ft1,440 m
OvercastTemperature 39°4°Rain chance 0%Wind 7 mph11 km/hSETrack temperature 39°4°Density altitude 4,699 ft1,432 m
OvercastTemperature 39°4°Rain chance 0%Wind 7 mph11 km/hSETrack temperature 39°4°Density altitude 4,690 ft1,430 mOvercastTemperature 41°5°Rain chance 0%Wind 6 mph10 km/hSETrack temperature 44°7°Density altitude 4,782 ft1,458 m
Partly cloudyTemperature 47°8°Rain chance 0%Wind 6 mph9 km/hESETrack temperature 58°14°Density altitude 5,140 ft1,567 mMostly clearTemperature 52°11°Rain chance 0%Wind 3 mph5 km/hESETrack temperature 72°22°Density altitude 5,419 ft1,652 mClearTemperature 56°13°Rain chance 0%Wind 0 mph1 km/hNNETrack temperature 84°29°Density altitude 5,640 ft1,719 mHours are track time (MST). Track temperature is an estimate. DA is density altitude.
The racer numbers
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.
Day by day
- TodayNov 861°16° 37°3° 0%Green flag
- TomorrowNov 962°17° 39°4° 0%Green flag
- TueNov 1060°15° 42°5° 0%Green flag
- WedNov 1160°16° 45°7° 0%Green flag
- ThuNov 1261°16° 47°8° 0%Green flag
- FriNov 1359°15° 48°9° 1%Green flag
- SatNov 1459°15° 47°8° 3%Green flagpartial
| Day | Flag | Sky | High / low | Rain | Gusts | Track temp | Density alt. | Sunrise · sunset |
|---|---|---|---|---|---|---|---|---|
| Today Nov 8 | Green flag | Clear | 61°16° 37°3° | 0% | 12 mph20 km/h ESE | 90°32° | 5,935 ft1,809 m | 6:48 AM · 5:07 PM |
| Tomorrow Nov 9 | Green flag | Partly cloudy | 62°17° 39°4° | 0% | 10 mph15 km/h ESE | 86°30° | 6,012 ft1,832 m | 6:49 AM · 5:06 PM |
| Tue Nov 10 | Green flag | Overcast | 60°15° 42°5° | 0% | 7 mph12 km/h SSW | 84°29° | 5,922 ft1,805 m | 6:50 AM · 5:05 PM |
| Wed Nov 11 | Green flag | Clear | 60°16° 45°7° | 0% | 5 mph8 km/h SSE | 86°30° | 5,866 ft1,788 m | 6:51 AM · 5:04 PM |
| Thu Nov 12 | Green flag | Clear | 61°16° 47°8° | 0% | 5 mph9 km/h SE | 87°31° | 6,020 ft1,835 m | 6:52 AM · 5:03 PM |
| Fri Nov 13 | Green flag | Overcast | 59°15° 48°9° | 1% | 6 mph10 km/h SSE | 82°28° | 5,987 ft1,825 m | 6:53 AM · 5:02 PM |
| Sat Nov 14 | Green flag | Partly cloudy | 59°15° 47°8° | 3% | 5 mph8 km/h SE | 86°30° | 6,076 ft1,852 m | 6:55 AM · 5:01 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
Every hour, every number
Today’s remaining 12 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 57°14° | 29°-1° | 35% | 30.26 inHg1025 hPa | 5,640 ft1,719 m | 1.035 | 28 | 85°30° | 2 mph4 km/h SSE | 0% | |
| 59°15° | 28°-2° | 30% | 30.22 inHg1024 hPa | 5,806 ft1,770 m | 1.030 | 26 | 90°32° | 1 mph1 km/h SSE | 0% | |
| 61°16° | 28°-2° | 28% | 30.24 inHg1024 hPa | 5,872 ft1,790 m | 1.028 | 26 | 87°31° | 1 mph2 km/h N | 0% | |
| 61°16° | 28°-2° | 28% | 30.19 inHg1022 hPa | 5,935 ft1,809 m | 1.026 | 26 | 79°26° | 4 mph6 km/h NNW | 0% | |
| 59°15° | 32°0° | 35% | 30.18 inHg1022 hPa | 5,857 ft1,785 m | 1.028 | 31 | 68°20° | 7 mph12 km/h NW | 0% | |
| 54°12° | 33°1° | 46% | 30.17 inHg1022 hPa | 5,578 ft1,700 m | 1.037 | 33 | 54°12° | 6 mph9 km/h NW | 0% | |
| 50°10° | 34°1° | 54% | 30.21 inHg1023 hPa | 5,348 ft1,630 m | 1.044 | 34 | 50°10° | 5 mph8 km/h NW | 0% | |
| 48°9° | 33°1° | 57% | 30.20 inHg1023 hPa | 5,233 ft1,595 m | 1.048 | 33 | 48°9° | 1 mph2 km/h W | 0% | |
| 46°8° | 33°0° | 59% | 30.22 inHg1023 hPa | 5,141 ft1,567 m | 1.051 | 32 | 46°8° | 1 mph1 km/h NNE | 0% | |
| 45°7° | 32°0° | 61% | 30.21 inHg1023 hPa | 5,081 ft1,549 m | 1.053 | 32 | 45°7° | 1 mph1 km/h SE | 0% | |
| 44°7° | 32°0° | 61% | 30.22 inHg1023 hPa | 5,040 ft1,536 m | 1.054 | 31 | 44°7° | 4 mph6 km/h E | 0% | |
| 43°6° | 31°0° | 62% | 30.22 inHg1023 hPa | 4,979 ft1,518 m | 1.056 | 31 | 43°6° | 4 mph7 km/h ESE | 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.
Plan the whole week at Grand Junction
Pit box, all week
Every forecast hour for the next seven days at Grand Junction: 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 Grand Junction, and a heads-up three days out.
A year at Grand Junction
Typical for November here: highs around 51°11°, lows 31°0°, rain on 15% of days.
5-year averages from the Open-Meteo archive at the track's coordinates.
Getting to Grand Junction
Grand Junction, Colorado
No street address published; directions go to the track itself.
We have not checked parking and camping here yet. The track’s own site has them: official site.
Facts
- Location
- Grand Junction, Colorado
- Layout
- Quarter-mile drag strip
- Length
- Quarter mile (1,320 ft)
- Series
- NHRA
- Time zone
- America/Denver
- Elevation
- 4,997 ft (1,523 m)