simple but good

2. Weather
*Is a term that encompasses
phenomena in the atmosphere of
a planet.
*It is also normally taken to mean
the activity of these phenomena
over short periods of time usually
no more than a few days.

3. To produce a short-range forecast is
indeed a big task involving the four
steps. Included in these are:
Observation
Collection and Transmission of
Weather Data
Plotting and Analysis of Weather
Data
Prognosis or Forecast

4. *From the weather
patterns, a number of
methods are used to
know the future state of
atmosphere, a job called
weather forecasting.

5. WHAT IS A
WEATHER
FORECAST?
(weather forecasting)

6. A weather
forecasting is
simply a scientific
estimate of future
weather condition.

7. *Weather condition is the state
of the atmosphere at a given
time expressed in terms of the
most significant weather
variables.
*The significant weather
variables being forecast differ
from place to place.

8. HOW IS A
WEATHER
FORECAST
MADE?

9. *In forecasting the weather, a
Meteorologist must at least know
something about the existing
weather condition over a large area
before he can make a reliable
forecast.
*The accuracy of his forecast
depends largely upon his knowledge
of the prevailing weather conditions
over a very wide area.

10. *The forecast decision
is based on various
forecasting tools.
*The basic tool of
weather forecaster is
the WEATHER MAP.

11. *The WEATHER MAP depicts the
distribution patterns of
atmospheric pressure, wind,
temperature and humidity at the
different levels of the
atmosphere.
*There are two types of the basic
weather map namely: the surface
map and the upper – air maps.

12. Five standard
level/steps of the
upper air maps that
are constructed
twice daily at twelve -
hourly interval.

13. *Observation
*Collection and Transmission of
Weather Data
*Plotting and Analysis of weather
Data
*Analysis of Weather Maps, Satellite
and Radar Imageries and Other
Data /Prognosis or forecast
*Formulation of Forecast

14. Observation

15. Plotting and Analysis Of
Weather Data

16. Analysis Of Weather Maps, Satellite
And Radar Imageries And Other
Data/Prognosis or Forecast

17. Formulation Of The
Forecast

18. *The surface maps are
made four times daily at
twelve- hourly interval.
The distribution patterns of
rain or other forms of
precipitation and
cloudiness can also be
delineated.

19. Numerical Weather
Prediction
*Is the science of
predicting the weather
using “models” of the
atmosphere and
computational techniques.

20. TECHNIQUES
*Persistence
*Use of a barometer
*Looking at the sky
*Now casting
*Use of forecast models
*Analog techniques

21. Weather
Elements:
*Temperature
*Atmospheric Humidity
*Atmospheric Pressure
*Wind

22. Weather
Instruments
*Temperature
 thermometer
Minimum thermometer
Thermograph
Thermometer Shelter or
Screen

23. Atmospheric
Pressure
*Barometer
Mercurial barometer
Aneroid barometer

24. Surface Wind
Velocity and
Direction:

25. Wind vane (weather vane)
Anemometer
Aerovane
Sling-psychrometer
hygrothermograph

26. *Hygrometer
*Precipitation
*Rain Gauge
*clouds

27. Special
Instruments to
Measure Upper-
Air Data:

28. *Pibal/Theodolite (Pilot Balloon
Theodolite)
*Radiosonde
*Wind-finding radar
*Weather surveillance radar
*Satellite imagery

29. Weather Satellite
Data: Modern Tool
for Weather
Analysis

30. *Polar-Obtaining
Satellites
*Geostationary
Meteorological Satellite
(GMS)

31. What
Causes
Rainfall?

32. Thank
you for
listening
…