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Frost advisory NPW – Issued during the locally defined growing season when minimum sheltered temperatures are forecast to be near or slightly above freezing (33 to 36 °F [1 to 2 °C]) over an extensive area on nights with good radiational cooling conditions (e.g., light winds and clear skies). Widespread frost can be expected.
The criteria for this warning vary from state to state, but typically an ice storm warning will be issued any time more than 1 ⁄ 4 inch (6.4 mm) of ice at peak is expected to accumulate in an area, else a freezing rain or drizzle advisory is issued; in some areas, the criterion is 1 ⁄ 2 inch (13 mm) instead. [1]
Local Weather Forecast Offices (WFO) of the National Weather Service may issue a Special Weather Statement to alert of a specified hazard that is approaching or below warning or advisory criteria, that does not have a specific alert product code of their own (such as for widespread funnel clouds with limited to no threat of complete tornadogenesis, the likelihood of landspouts, or strong ...
What's the difference between weather warnings and watches? What is an advisory? Here are weather safety terms you need to know.
A freeze warning is a warning issued by the National Weather Service when sub-freezing temperatures are expected in the next 36 hours. This can occur with or without frost . [ 1 ] When a freeze warning is issued in the fall , that will usually signify the end of the growing season , as sub-freezing temperatures will usually kill all remaining ...
A cold weather advisory (formerly known as a wind chill advisory until October 2024) [1] is a hazardous weather statement issued by Weather Forecast Offices (WFO) of the National Weather Service (NWS) in the United States to alert the public that temperatures or wind chills are forecast to reach values low enough that it poses a threat to human health and life if adequate protection is not ...
References to the "significant weather advisory" and "significant weather alert" terms in First Warning—a broadcast weather alert system derived for use by local television stations—and its derivatives vary by station and market; in most cases, the system's various iterations classify the product by generic thunderstorm-specific terms that ...
Weather Warning – A generic weather warning may be issued for extreme weather events for which there is no suitable warning type, because they rarely occur. For example, for 50 km/h winds following an ice storm which could cause structural wind damage, even if the wind warning criteria of 90 km/h (56 mph) is not expected to be reached.