aim: what are station models?
DESCRIPTION
I. Station Models - Use symbols to represent weather conditions in selected locations.TRANSCRIPT
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Aim: What are station models?
Do Now: Why would meteorologists use a station model to represent data rather then
writing it all over a map.
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I. Station Models- Use symbols to represent weather conditions in selected locations.
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ESRT Page 13
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A. Temperature• upper left corner (in degrees
Fahrenheit).
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B. Dew Point• lower left corner (in degrees
Fahrenheit).
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C. Winds• The stick that
comes off the circle is the "Wind Barb".
• The barb indicates the winds direction and speed.
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1) Direction
- barbs point in the direction where the wind is coming from.
W E
N
SWhere is this wind coming from?
Where is it blowing towards?
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2) Speed
•short feather = 5 knots (written in the middle)•long feather = 10 knots•If only circle is plotted, the winds are calm.
- Wind speed is written in the units of knots (knt), a nautical speed. (for fluids)
1 Knot = 1.15 mph
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D. Pressure• Upper right corner in coded form.
They need to be converted
Rules for converting pressure:
•500 and Higher1. Put 9 in front2. Move decimal one to left
•Less Than 5001. Put 10 in front2. Move decimal one to left
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E. Present Weather
Air Mass abbreviations Front
Symbols
Present weather
• Left side of circle (Symbol on ESRT p.13)
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F. Cloud Cover• The circle indicates
the percent of cloud cover observed at the time.
• Percent of circle filled = the percent of the sky filled with clouds
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Closure:
Obtain a Station Models worksheet from the front of the room. Use the rules at the top of the sheet and convert all the pressures on the sheet.