Topside Winter 2018 Newsletter | Page 20

Page 20 topside Volume 115, Issue 1 Ice Flights The eastern section of District 5NR experienced a triple-whammy of unique winter-weather conditions in one day. - A Blizzard accompanied by a Bomb Cyclone, followed by a prolonged Polar Vortex: 
Official blizzard criteria is 35+ mph wind gusts held visibility at or below a quarter -mile for 3+ consecutive hours.
Cyclone Bomb or Bomb Cyclone loosely defined is an extratropical cyclone that rapidly intensifies over a short period of time. Hurricanes are a type of cyclone, but any strong storm where winds spiral around a well-defined center fits the criteria. A Polar Vortex is a persistent, large-scale, low pressure zone that rotates counter-clockwise at the North Pole that extended into North America resulting in a record-breaking freeze as relentless waves of cold air swept down from the high latitudes. The Coast Guard Sector Delaware Bay captain of the port (COTP) set ice condition 3, and cautions mariners to be aware of ice formation on the Delaware Bay and its tributaries. Ice condition 3 is set when weather conditions are favorable for the formation of ice in navigable waters. The status and extent of these restrictions are continuously evaluated, as ice condition reports are received and assessed. Specific Coast Guard Auxiliary units and assigned Auxiliary Air patrols are assigned to report observed ice conditions to the Coast Guard Sector Delaware Bay command center. by Joseph Giannattasio Photos taken by Judy Redlawsk