Why are tornado warning areas always shaped like a rhombus?

Question

Nobody seems to have an answer to this, though it's been posed multiple times here and on other sites.

If you'll notice, the tornado warning areas on weather maps are always shaped like a rhombus. Always. No exceptions. Does anyone know WHY this is?

Before you attempt to answer, let me put an end to a common misconception: these areas shown on maps have absolutely, 100% NOTHING to do with counties. Counties come in all shapes and sizes, but tornado warnings are ALWAYS in the shape of a slanted rhombus.

Answer 1

its because of the path of the tornado. typically, the tornado will not move directly north/south or east/west, which results in a slant. and the reason for a rhombus - it wouldnt make sense to have a circle or other odd shape. the warning covers the area it COULD go.

Answer 2

Maybe to imply "movement" at rectangle does not imply movement. That is my giess.

Answer 3

depends on what your talking about, a watch is shaped like a rhombus and/or rectangle to imply the possible areas for severe weather containing tornadoes, a tornado warning is issued for specific areas that currently has tornadoes or is expected to get one shortly, these come all different shapes a sizes, usually small.