Handout (5.4 MB)
The synoptic-scale set-up was very similar with all three systems. A Miller Type B scenario occurred with each storm, as the primary surface cyclone weakened upstream of the Albany forecast area with a secondary low forming near the Mid Atlantic Coast with a subsequent favorable track for moderate to heavy snow. Upper-level jet streaks played a major role, as well as low-level easterly (-U) wind anomalies tapping copious Atlantic moisture for the heavy snowfall. Precipitable water anomalies as well as favorable integrated water vapor transport aided in the constant supply of moisture for each snowstorm in conjunction with sufficient cold air in place. Low to mid-level 2-D Petterssen frontogenesis (850 to 700 hPa, and 500-700 hPa) helped enhance snowfall rates (2.5-10 cm/hr) in all three systems due to mesoscale banding in the deformation zone of the systems.
This talk will focus on the application of conceptual models that were developed in Collaborative, Science, Technology, and Atmospheric Research (CSTAR) projects with the University at Albany over the past decade to aid operational meteorologists for heavy snow forecasting. The emphasis will be on mesoscale banding, cold pools with upper lows, atmospheric rivers, localized Mohawk Hudson Convergence for heavy snow, mid and upper low positioning and local flows for heavy snowfall in orographic enhancement. Future CSTAR VII research will include a project on improving the forecasting of near-freezing winter precipitation in complex terrain, which was also an issue associated with these early spring storms, especially on March 2nd when temperatures were only marginally cold enough for snow in the Hudson Valley.