SMTO Weather Information:
NEW! Live plots of SMTO weather
Last measurement done on 15-MAR-2025 at 4:17 MST.
| Temperature | Pressure | Humidity | Wind Speed | Wind Direction | Tau | |
| Current | 16.9°F / -8.4°C | 20.2 in. Hg / 681.4 hPa | 97.2% | 2.0 mph / 0.9 m/s | 113.0° | 0.102 |
| 1 hour low | 16.7°F / -8.5°C | 20.2 in. Hg / 681.3 hPa | 97.0% | 0.1 mph / 0.1 m/s | 220.1° | 0.314 |
| 1 hour high | 17.5°F / -8.0°C | 20.2 in. Hg / 682.6 hPa | 97.0% | 8.1 mph / 3.6 m/s | 95.0° | 0.344 |
| 24 hour low | 8.5°F / -13.1°C | 20.0 in. Hg / 676.3 hPa | 82.9% | 5.0 mph / 2.3 m/s | 139.1° | 0.057 |
| 24 hour high | 17.6°F / -8.0°C | 20.5 in. Hg / 691.2 hPa | 97.5% | 17.1 mph / 7.6 m/s | 0.1° | 0.344 |
Current Atmospheric Opacity:
The most recent tau measurement was done on 15-MAR-2025 at 4:21 MST
Tau(225 GHz) = 0.102 (Click here to see a fit to this measurement)
| Spectral Line | Frequency (GHz) | Opacity |
| 12CO J=2-1 | 230 | 0.14 |
| 12CO J=3-2 | 345 | 0.35 |
| 12CO J=4-3 | 460 | 1.14 |
| [C I] | 809 | 1.88 |
Note: The scaling factors are now derived from actual skydips in the given bands. We use a tau and frequency averaged constant for each band. The old numbers (before February 25th, 1999 were theoretical numbers calculated from atmospheric models. We do not show 492 and 691 GHz numbers because we do not yet have enough data points to calculate the factors.
You can also browse the SMTO Weather Statistics Page for a summary of all recent tau(225 GHz) measurements.