1. Air Masses and Fronts

2. Air Mass Source Region

3. Fronts
Cold
Warm
Occluded Stationary

4. Cold Front Winds Weather Temperature Rules of Thumb
Southwest Shifting to Northwest after Frontal Passage
Weather
Thunderstorms
Rainshowers
Temperature
Cooler and drier after frontal passage
Rules of Thumb
Southwest Wind
Cumulus (puffy) clouds
Falling Pressures
Increasing cloudiness

6. Towering Cumulus

7. Cumulonimbus

8. Warm Front Winds Weather Temperature Rules of Thumb
Southeast Shifting to Southwest
Weather
Rain, Drizzle, Possible Thunderstorm
Fog (when ground is cool)
Temperature
Warm and Moist After Frontal Passage
Rules of Thumb
Southeast Wind
Stratus (flat)clouds)
Falling Pressures
Increasing cloudiness, low ceilings, slow clearing after passage

10. Stratus
a Common Warm Frontal Cloud

11. Stationary Front Winds Weather Temperature Rules of Thumb
Northeasterly on cold air side, southeast on warm air side
Weather
Thunderstorm on Cold Air Side
Temperature
Minor variations across front
Rules of Thumb
Persistently poor weather
STATIONARY FRONTS CAN LAST FOR DAYS OR WEEKS!!!

12. Occluded Front Winds Weather Temperature Rules of Thumb
Southeast to south, after passage West to Northwest
Weather
Combination of Warm and Cold Fronts
Rainshowers, Drizzle, Possible Thunderstorm
Fog (when ground is cool)
Temperature
Change less significant
Rules of Thumb
Mixed bag of weather
Low Pressures

13. Fronts on a Weather Chart