1) Storm-tracking org 2) Storm-tracking organisation 
National Hurricane Center. The office of the National Weather Service in Miami that is responsible for tracking and forecasting tropical cyclones.
National Health Council
New Zealand National Health Committee
National Hurricane Center
National Hurricane Center. The office of the National Weather Service responsible for tracking and forecasting tropical cyclones.
Navigators Hand control
Nephrology Hypertension Clinic, P.C
acronym: United States National Hurricane Center
National Homebrew Competition. An annual homebrew competition sponsored by the American Homebrewers Association. Brewers submit entries to a first round judging in their geographic area; winners from the first round judging advance to a second round (national) judging.