how can you interpret a weather maps?. weather maps are used to show the current state of the...
TRANSCRIPT
Weather Maps are used to show the current state of
the atmosphere and to forecast future conditions.
Isolines connect points of equal MEASURMENTS.
Isotherms connect points of equal TEMPERATURE
Isobars connect points of equal PRESSURE
Pressure Gradient - Is the rate of change in air
pressure.
-The closer the isobars the greater
the pressure gradient
- The greater the pressure gradient
the greater the wind speed.
Isobars close together = high pressure gradient = fast wind
speeds
Isobars far apart = small pressure gradient = slow wind speeds
Rules for Drawing Isolines
1.Isolines don’t cross each other!
(Although sometimes they come very close together)
2. Isotherms should run east – west.
(The higher the latitude, usually the colder the isotherm)
3. Isobars should make circles of high and low pressure
Isoline Example:
Isolines connect points of equal value, draw the line through the center of the number (or point)
15
5 5
1510
1010
10
Isolines are gentle, curving lines; no sharp corners.
(THESE ARE BAD CONTOUR LINES)
15
5 5
1510
1010
10
Isolines NEVER cross - **this would mean that one
point has two different values.**
20°
30 °
40 ° 50 ° 60 °
X
YZ
•The red line is WRONG •The black lines are RIGHT