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8a and 8b. H. L. 8c. H. 8d. H. L. Highest Isobar (1024.0 mb). Highest Air Pressure (1025.0 mb). Pressure Gradient between Little Rock and Galveston. 1008.0 mb. 1012.0 mb. PG = Change in Pressure Distance PG = 1012.0 mb – 1008.0 mb = 4.0 mb = 0.01 mb/mi

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8c

H


8d

H

L


Highest Isobar (1024.0 mb)

Highest

Air Pressure

(1025.0 mb)


Pressure gradient between little rock and galveston
Pressure Gradient between Little Rock and Galveston

1008.0 mb

1012.0 mb

  • PG = Change in Pressure

    Distance

  • PG = 1012.0 mb – 1008.0 mb = 4.0 mb = 0.01 mb/mi

    400 mi. 400 mi


Highest

Pressure

(1020.2 mb

Lowest

Pressure

(1002.4 mb)


Pressure gradient between stations x and y
Pressure Gradient between Stations X and Y

1004.0 mb

  • PG = Change in Pressure

    Distance

  • PG = 1012.0 – 1004.0 mb

    500 mi

  • PG = 8.0 mb

    500 mi

  • PG = 0.016 mb/mi

1012.0 mb


Wind pattern around the low
Wind Pattern Around the Low

  • Flows into the low

    • Convergent winds

  • Counterclock-wise pattern


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