|12Z (8 AM) OKX Sounding.|
The DOW left Stony Brook University around 11:30 AM and made its way to Jones Beach. This wasn't an easy feat because at 13.5 feet tall, the DOW can't simply take the Google Maps-suggested route with the low bridges on the parkways. As soon as the DOW arrived at the West End of Jones Beach, there were already some developing cumuli right along the sea breeze boundary near the Queens/Nassau border. This is almost exactly what was observed and scanned with the DOW on Monday! Because there was a lot of instability and moisture, the cooler and denser air that was flowing from the ocean acted like a boost to the air near the surface that caused it to rise and form clouds. The DOW reflectivity data showed the small cells producing rain, but nothing more severe like hail. The DOW velocity data showed the cells moving away from our location, or off to the northeast over the Long Island Sound.
|The developing cells that greeted the DOW at Jones Beach for Mission #6.|
|The Tornado Watch issued by SPC ahead of the MCV.|
The MCV was still rotating and causing flooding over western NJ by the time some of the team and the DOW returned to Stony Brook University. There were no reported tornadoes by this time either. At around 9 PM the decision to not have a night mission to catch the MCV was made. This decision was based on the fact that, at that time, the thunderstorm cells associated with the MCV were weakening and the line that was expected to pivot across Long Island was actually thinning and breaking apart. The mesoscale models also provided some support for that decision. Unfortunately, although that line of storms did weaken immensely, they released to the east a lot of low-level cooler air caused by the evaporation of raindrops near the surface which is known as an outflow boundary. The outflow boundary acted to organize a fresh line of storms that did in fact cross Long Island from 10-11 PM. Oh well, the DOW needed to get some rest after about 7 hours of scanning! Mission #6 was still a valuable mission that collected data on convection along the Long Island Sea Breeze. We didn't get to measure the MCV simply because it took too long and we want to be awake and eager for our next mission, of course!
- For the exact definition of a mesoscale convective vortex, please visit this site: https://www2.ucar.edu/news/backgrounders/thunderstorm-glossary#mcv
- For the near real-time data that we use to make some decisions out in the field, please visit this site: http://www.spc.noaa.gov/exper/mesoanalysis/new/viewsector.php?sector=16