1. Part 7
2/22/2019

2. Week 16, 17, 18 and 19 The Atmosphere
Modules 3, 4, 7 and 8 in AP
The study of the Air and the Atmosphere and how we measure them
Movement of the Atmosphere - Air Masses, Winds and Storms
Weather Prediction
Next test: Week 19 T Jan 23/25 - covers the atmosphere and hydrosphere
Week 20 A Jan 30 - I will be away - analysis exercise
U of IL - Wx Course
Lyndon State Course
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3. Prep Questions Week 16 Week 17 Week 18 Week 19
(1) What role does the sun play in causing seasons and the weather?
(2) What is the composition of the air?
(3) What is the role of each component?
Week 17
(1) What are the 5 layers of the atmosphere?
(2) What is temperature?
(3) What is Ozone hole?
Week 18
(1) What factors influence the weather?
(2) What are the weather elements?
Week 19
(1) What are the factors that cause precipitation?
(2) What are the differences and common characteristics of a thunderstorm, tornado, hurricane and a nor'easter low pressure system?
2/22/2019

4. Current Weather Review 
Radar/Sat
US Radar
US Radar NWS
Goes Sat Page
US Sat IR
NRL Sat
US Sat Vis
NY VIS
Sfc Analysis NWS
Surface Plots
Surface 12 Hour Fcst
Surface 24 Hour Fcst
Surface 36 Hour Fcst
Surface 48 Hr Fcsts
Emergency
CURRENT SVR Wx RADAR
National Weather Situation Page  
Severe Weather Alert Link
Your Local Forecast
Local Fcsts
Rome NY 
 43.23°N 75.46°W 
Rome Griffiss Airfield
Lat:   Lon:   Elev: 504 ft Lat/Lon: 43.23°N 75.46°W   Elevation:482  
BGM Discussion 
Wx Maps
NAM
GFS
1. GFSx -Upper
2.GFSx-MRF- Precip
Long Range NWS Model
ECMWF
CPC
Datastreme
Climo
SYR CLIMO
CLIMO STAT CNY
ALB CLIMO
Other
NASA Solar Science
Solar-Sun Spot-Space-Wx
Sun & Moon Rise & Set Tables
Moon Phases
Your Sky Start Charts
Tides Maine
NOAA Space Wx
Forecast Central
2/22/2019

5. Wind circulation around synoptic scale (large scale) high and low pressure systems
The net result is that around synoptic scale pressure systems the CF cause the wind to circulate around the pressure systems and do not blow directly from the center of the high to the center of the low pressure as you initially might think. Thus the winds blow basically parallel to isobars with
Clockwise circulation around a High Pressure system
Counterclockwise circulation around a Low Pressure system.
Surface friction modifies this relationship a little bit so the winds tend cross isobars form high to low at an angle of degrees form parallel.
This is important because friction helps to cause low level convergence and upward motion at the center of lows and low level divergence and downward motion at the center of highs.
To be sure there are other factors that are more important in causing upward or downward motion than friction, but it is an important factor.
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6. 2/22/2019

7. Buys Ballot's law"
In the Northern Hemisphere, if you stand with your back to the wind, low pressure will be to your left.
Near the surface the frictional effect deflects the wind degrees into low pressure side. Must modify Buys Ballot's law near surface to account for this. Just rotate degrees to the right of the wind at your back.
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8. Large Scale Storms
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