The arrows are winds (spinning counterclockwise and spiralling inward around the low, spinning clockwise and diverging around the high) that were drawn in lightly with a pencil.  Using this the winds were drawn in at Points 1, 2, and 3.  Winds are blowing from the NW at Point #1, from the SE at Point #2, and from the NW again at Point #3.  20 knot winds are shown at Point #1, 30 knots at Point #2, and only 10 knots at Point #3

The air at Point #2 is probably relatively warm because these winds are coming from the south.  The air at Points #1 and #3 is probably colder because these winds blow from the north.