BOMBOGENESIS (a rapidly intensifying storm) will take place Tuesday afternoon off the Virginia coast.
Computer models had an extreme reversal on the intensity and track of this storm over the last 24-36 hours, and that’s why snow amounts were jacked up Monday as computer models came late to the snow party.
Hinting started to take place late Sunday as my forecast called for a significant storm for some with 4+ inches of snow possible across parts of New Jersey. But a big uptick in moisture being fed into the storm combined with a piece of the polar vortex sending another package of severe cold. This time, it gets pulled into the storm’s circulation leading to rapid intensification and high snow ratios.
Normally we receive a 10-1 ratio, with one inch of liquid equaling 10 inches of snow, but in this case we have an overall ratio of 13-1, to as much as 15-1, meaning more snow with less liquid.
Map of Pennsylvania highlighting Montgomery County (Photo credit: Wikipedia)
(UPDATED 10:45 a.m.) An Atlantic Clipper snowstorm traveling across the East Coast Tuesday could drop up to 9 inches of snow in some areas, causing some schools to close and others to institute early dismissal.
Boyertown, Daniel Boone, Owen J. Roberts and the Spring-Ford School District all cancelled classes and all afterschool activities.
Pottstown, Phoenixville, Upper Perkiomen, and the Pottsgrove school districts were all dismissing students early as the snowstorm was expected to worsen in the afternoon.
Collegeville, East Greenville, Spring City Borough, Lower Pottsgrove, and Upper Pottsgrove townships declared snow emergencies Tuesday morning. The snow emergency in Spring City was declared for 9 a.m. and will be in place until noon Wednesday.