Labs 7 & 8 - Lab 7 Surface Map Analysis Part 1...

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Lab 7: Surface Map Analysis Part 1: Analyses of Station Model Plots 1. i Phoenix 2. g Dallas 3. b Miami 4. j Philadelphia 5. d Minneapolis 6. a Atlanta 7. h new york city 8. e San Francisco 9. f Chicago 10. c Tinker Air base 11. l Salt lake City 12. k Baltimore 2. 3. 4. The lowest pressure is from Central Kansas into northeast Nebraska. 5. Location with the strongest pressure gradient is in Oklahoma. 6. Examine the isobars and the wind speeds at the stations. Describe the relationship between pressure gradient and wind speed. The weaker winds are found in Texas, Southeast Oklahoma, Arkansas, and Missouri. Stronger wind speeds (i.e., 15 kts to 25 kts) were located where the pressure gradient was stronger (e.g., Southern Nebraska, Kansas, and Northwest Oklahoma). Since pressure gradient represents a change in barometric pressure over a distance, greater change within a shorter distance would equal higher wind speeds. Thusly, a place with a lesser change in pressure with longer distances would mean that lower or non-existent winds exist in that area. The reason for this is that higher air pressure always moves toward lower air pressure in an attempt to gain balance within the atmosphere. Steeper gradients result in a stronger push. 7. Describe the relationship between the pressure tendency and the direction of movement of the low pressure system.
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Pressure tendency is the change in sea level pressure during the past 3 hours expressed in tenths of a milibar which ends at the time of observation . Higher air pressure always moves towards lower air pressure system in an attempt to gain balance within the atmosphere.
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