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Terminology Used In CNRSE Warnings

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

Tropical system with winds 50 knots or greater.

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 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.

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.

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

Sustained winds between 34 and 47 knots.
Sustained winds of 48 knots or greater.


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