Winter Weather Advisory issued for most of NJ: What does that mean?
As the impending winter storm takes over headlines across New Jersey, it's important to understand the difference between a watch, a warning, and an advisory.
A Winter Weather Advisory has been issued for the following counties for the following times:
--1 a.m. to 10 a.m. Friday for Morris, Hunterdon, Somerset, Middlesex, Mercer, Salem, Gloucester, Camden, northwestern Burlington, eastern Passaic, Bergen, Essex, and Union counties
--1 a.m. to Noon Friday for Monmouth, Ocean, Cumberland, Atlantic, Cape May, and southeastern Burlington counties
A Warning is issued when potentially dangerous weather is imminent or occurring. A Watch is a "heads-up", and means treacherous weather is anticipated at some point in the future. And an Advisory is a less urgent, less severe notification that bad weather is expected.
Wintertime watches, warnings, and advisories can be incredibly tricky to decipher and differentiate from each other. So here's a basic winter warning types primer specifically for New Jersey, with official definitions from the National Weather Service...
Winter Weather Advisory
Hazardous winter weather conditions involving snow, freezing rain or freezing drizzle, sleet, and/or blowing snow are occurring, imminent, or likely. Conditions will cause a significant inconvenience and if caution is not exercised, may result in a potential threat to life and/or property.
Winter Storm Warning
Heavy snow, heavy sleet, or a combination of two or more winter weather hazards (including snow, blowing snow, freezing rain, and sleet) are occurring, imminent, or highly likely. Specific warning criteria for "heavy snow" requires:
--North Jersey (Mercer/Monmouth Co. and northward): 6" of accumulation in 12 hours OR 8" of accumulation in 24 hours
--South Jersey (Burlington/Ocean Co. and southward): 5" of accumulation within 12 hours OR 6" of accumulation within 24 hours
Winter Storm Watch
Significant accumulations of snow, freezing rain, and/or sleet are possible within 12 to 48 hours in the future.
Ice Storm Warning
A period of freezing rain is expected to produce heavy ice accumulations of 1/4" or greater, causing significant disruptions to travel or utilities.
Issued when Blizzard conditions are expected:
--Sustained wind or frequent wind gusts greater than or equal to 35 mph,
--Accompanied by falling and/or blowing snow,
--Frequently reducing visibility to less than 1/4 mile,
--For three hours or more.
Blizzard conditions are possible within 12 to 48 hours in the future.