Terms

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Terms

Terminology Used In CNRSE Warnings

TROPICAL WIND ADVISORY -
Winds 34 - 49 knots (associated with a tropical system).

TROPICAL CYCLONE -
Tropical system with winds 50 knots or greater.

THUNDERSTORM -
Thunderstorms are forecast to impact the warning area with gusty winds with velocities less than 50 knots. Lightning and thunder can be expected; hail, if any, less than 3/4 inch in diameter.

SEVERE THUNDERSTORM -
Severe thunderstorms with wind gusts 50 knots or greater. Lightning, thunder and hail, if any, 3/4 inch or greater in diameter are forecast to impact the warning area.

TORNADO -
Tornadoes have been sighted or detected by RADAR in or adjacent to the warning area, or have a strong potential to develop in the warning area.

SMALL CRAFT WARNING -
Winds up to 33 knots (including gusts). The lower threshold for issuing such warning is set by local area authority.

GALE WARNING -
Sustained winds between 34 and 47 knots.

STORM WARNING -
Sustained winds of 48 knots or greater.

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