Weather Analysis and Wind Speed

David Burch from Starr Pass School of Navigation presents a video tutorial on analyzing archived weather maps. The video covers techniques to determine wind speed and direction using isobars, ship reports, and latitude. It also explains how to create a grid for accurate measurement and calculate atmospheric pressure. The tutorial emphasizes the importance of understanding isobars and their spacing to estimate weather conditions accurately.

What was the initial question posed about the weather map?

• What is the temperature at 30°N, 130°W?

• What is the wind speed at 30°N, 130°W?

• What is the humidity at 30°N, 130°W?

• What is the pressure at 30°N, 130°W?

What was the wind speed reported by one of the ships?

• 15 knots

• 10 knots

• 5 knots

• 20 knots

What factor might have influenced the ship's wind report?

• Temperature changes

• Convection

• Humidity levels

• Sea currents

What does the spacing of isobars on a weather map indicate?

• Precipitation

• Humidity levels

• Wind speed

• Temperature variations

How many nautical miles are in one degree of latitude?

• 60 nautical miles

• 45 nautical miles

• 75 nautical miles

• 30 nautical miles

What tool is considered a luxury for creating a grid on a map?

• Protractor

• Compass

• Pair of dividers

• Ruler

What is the estimated wind speed at 30° latitude according to the textbook?

• 11 knots

• 13 knots

• 15 knots

• 9 knots

What is the estimated wind direction at the specified location?

• 90°

• 350°

• 270°

• 180°

What is the estimated pressure at the specified location?

• 1025 millibars

• 1010 millibars

• 1030 millibars

• 1018.5 millibars

Where can the detailed procedure for this analysis be found?

• In a navigation software

• In a weather app

• In a marine weather textbook

• In a meteorology journal