We launched a weather balloon at 7pm EST (00Z) Saturday evening to sample the arctic airmass that was over the northeast U.S. Here’s some quick facts about the sounding:
| Surface temperature | -16°F |
| Lowest temperature in sounding | -37.2°F at 864 hPa |
| 850 hPa temperature | -33.5C (-28.2°F) |
| Tropopause height (estimated) | 585 hPa (3.8km, 2.38 miles) |
| Precipitable water | 0.03″ |
