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300 mb. 300 mb. 500 mb. 500 mb. 1000 mb. 1000 mb. PRESSURE ALOFT. Top of Atmosphere. 300 mb 500 mb 1000 mb. Earth’s surface. 0 o N 45 o N 90 o N. Tall Blocks. Short Blocks. PRESSURE ALOFT. PRESSURE ALOFT. 90 o N 45 o N 0 o N. 5200. 5400. 5600. 5800.

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PRESSURE ALOFT

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300 mb

300 mb

500 mb

500 mb

1000 mb

1000 mb

PRESSURE ALOFT

Top of Atmosphere

300 mb

500 mb

1000 mb

Earth’s surface

0oN 45oN 90oN


Tall

Blocks

Short

Blocks

PRESSURE ALOFT


PRESSURE ALOFT

90oN

45oN

0oN

5200

5400

5600

5800


PRESSURE ALOFT

90oN

45oN

0oN

5200

5400

5600

5800


PRESSURE ALOFT

90oN

45oN

0oN

5200

5400

5600


PRESSURE ALOFT


PRESSURE ALOFT

5800

5760

5700

5640

5580

5520

5460

5400

5340

5280

HL


HL

PRESSURE ALOFT

5800

5760

5700

5640

5580

5520

5460

5400

5340

5280


PRESSURE ALOFT


PRESSURE ALOFT


MERIDIONAL FLOW


ZONAL FLOW


GEOSTROPHIC WIND

5300

5500

5700


TYPICAL 500mb CHART

Note wind speed/pressure gradient relationship!


THE JET STREAM


THE JET STREAM


THE JET STREAM


THE JET STREAM


MID-LATITUDE JET

Pressure = 250 mb

Pressure = 250 mb

X

10000 m

Wedge of

Cold Air

60oN30oN


300 mb MID-LATITUDE JET


MID-LATITUDE JET


PRESSURE SYSTEMS


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