Lab 6-5
Weather Patterns
Map A: Isotherms
Connect points of equal value
 Use an interval of 10°F
 Stop your lines when they go off the coast.

If more dots are
needed, add some…
Map B: Isobars

Write the following in an empty space on the map:
Millibars
Station Model Code
1024.0
1020.0
1016.0
Fill in the code here
1012.0
1008.0
1004.0
1000.0
Map B: Isobars- Continued
Draw isobars
 Use an interval of 4mb.
 Label the highest pressure with an


Label the lowest pressure with an
Map C: Wind Patterns
Draw arrows…
Map C: Wind Patterns
Now Draw Large Arrows…
Map D:
Precipitation Patterns
Draw a line encompassing the entire area
where rain is falling.
 Lightly shade it in with pencil.
 Label the Air Masses.

Handy Dandy Earth Science
Reference Tables, pg 13
An Air Mass is a large region of air that has
the same temperature and humidity.
 It gets its properties from hanging out in the
same region for a while.

For example:
If the source region is the gulf of Mexico
and the air comes to Long Island…
 It will feel warm and moist to us: maritime
tropical (mT).

If it comes from central Canada…
 It will feel cold and dry to us: continental
polar (cP)

What type of air mass?
mP
Cool & moist:
mP
Cool & Dry:
mP
cP
cT
Warm & Moist:
mT
mT
mT
Make the Synoptic Map


Use Instruction #1 as a check list of things to put
on the map.
Add the fronts.
Now that we know WHERE the
fronts are, how do we know what
KIND they are?
If colder air is coming in, it is a cold front.
 If warmer air is coming in, it is a warm
front.

How to Find & Label Fronts