24 hours infrared images, East Asia, 5/8/2014
Find the triggers for the weather (4 panels).
4 panels – 06, 12, 18, 00
Using visible and infrared channel what kind of clouds would you expect.
What sort of hazards ?.
4 panel visual weather = try a tropical region. N. Australia and also
Indonesia.
Diurnal, synoptic stationary, synoptic moving. Forecast strategies.
images courtesy JMA/BOM
Visible, infrared images, ACCESS-G gradient and 200 hPa winds
W winds
L
H
L
T
SW winds
visible image, 06UTC 5/8/2014
images courtesy JMA/BOM
ACCESS-G Gradient Winds 06UTC 5/8/2014
W winds
H
H
L
L
T
NE winds
infrared image, 06UTC 5/8/2014
ACCESS-G 200hPa winds 06UTC 5/8/2014
Visible, infrared images, ACCESS-G MSLP and 200 hPa winds
T
visible image, 06UTC 5/8/2014
ACCESS-G MSLP 06UTC 5/8/2014
images courtesy JMA/BOM
H
H
L
L
T
infrared image, 06UTC 5/8/2014
ACCESS-G 200hPa winds 06UTC 5/8/2014
Activity 1 questions
• Examine the previous three slides.
• In the first slide, displaying 24 hours of 6
hourly infrared images over the northwestern
Pacific and China, identify synoptically driven
weather (S) and diurnally modulated weather
(D).
• Using the second and third slides, displaying
visible and infrared satellite and model data,
identify the drivers of the weather.
• How does the visible and infrared imagery
help you to distinguish between the different
cloud types ?.
Windspeed and direction determination using visible imagery
image courtesy University of Wisconsin - CIMSS
Ex-Tropical Cyclone Hamish, Coral Sea
image courtesy JMA/BOM
South island of New Zealand
image courtesy NASA/GSFC./ESDIS (LANCE)
image courtesy JMA/BOM
• Notes
Southern Ocean low pressure system
Sumba island, Indonesia (MODIS)
Activity 2 questions
• Looking at the previous slide, examine the
four panels of the visible imagery, with given
locations.
• What do the cloud patterns tell you about
wind strength and direction ?.
• What conceptual models can you invoke in
each case to assist you in your forecasting.
• What additional data would be useful here
Use of visible and infrared imagery in nowcasting
Afternoon storms, central north Queensland
A
B
Morning cloud, northern Australia
image courtesy JMA/BOM
images courtesy JMA/BOM
image courtesy NASA/GSFC./ESDIS (LANCE)
C
Storms, central north Queensland
(enhanced IR)
D
Smoke, Victoria, Australia (MODIS)
Activity 3 questions
• Looking at the previous slide, examine the
four panels, three of which are in the visible
channels, and one which is enhanced
infrared imagery, brightness temperature
scale included.
• What information can you infer from looking
at these examples that may assist you in
nowcasting for:
A, C – thunderstorm development
B – fog / low cloud development
D – Smoke/ fire development
• What additional data would be useful here