1. Weather and Weather Prediction Notes

2. Weather
___________= the condition of the _____________at a particular _______and _______
Weather ___________= a _____________of ___________weather conditions over the next _________days
Weather
atmosphere
time
place
Forecast
prediction
future
3 to 5

3. Weather Station Model Diagram outline of station model: (pg. 105)
_____ __________
_____________.
__________ ____________
Temp
Pressure
Weather Cond
Dew Point
Precip amt

4. Surface station model Surface observation data station model:
-located on map where _________was located
EX.
data

5. Cloud Cover
Cloud cover = shade in circle
EX.

6. Wind Direction
_________direction = ______in ___________wind is coming _________
EX.
Wind
direction
line
FROM

7. Wind speed
Wind speed =
Ex.

8. Pressure- measured in __________(mbar) millibars
# is _________than 500, put a ____in front and a ___________one place from the right
Ex. 802….980.2
# is ________than 500, put a _____in and a decimal one place from the _________
Ex. 347…
EXAMPLES
millibars 9
greater
decimal 10
less
right

9. ________________= measure of how _______or _________something is
_______Point = the _____________air must ________to be completely____________
Saturated: reached moisture compacity
Temperature
hot
cold
Dew
temperature
cool
saturated

10. Examples
Turn to page 105
Your turn

11. Fronts Fronts = leading _______of an ______mass/_________ edge air
boundary

12. Warm Front Warm = _______air replacing __________air
-weather = (indicated________________)
a. ________clouds –_______, feathery, found at ________altitudes
b. _________-clouds that form in __________
-nimbostratus
c. steady _____________________
d. _____________temp
warm
cooler
snow/rain
cirrus
thin
high
stratus
layers
precipitation
increased

13. Cold Front ________= cool air ____________warmer air weather =
____________clouds- ___________white clouds, tend to have _________bottoms
-cumulonimbus
________showers
___________temp
replacing
Cold
cumulous
puffy
flat
brief
decreased

14. Occluded Front
__________= (type of cold front) cold front ____________up with warm front
-“_________” warm air mass from ___________
-_________weather
a. high wind d. tornado
b. hail e. heavy rain
c. lightening
Occluded
catching
cuts off
ground
severe

15. Stationary front
___________= _______air masses can not _______other ______of way
-weather = _________rain until moves out
Stationary
two
push
out
steady

16. Frontal Weather
Air mass = a large amount of air that takes on the temperature and humidity of the area it forms over .
Continental tropical (cT) = warm, dry —Mexico, SW US
Continental polar (cP) = cold, dry -- Canada

17. Frontal Weather
Maritime tropical (mT) = warm, moist – S. Pacific, S. Atlantic .
Maritime polar (mP) = cold, moist – N. Pacific, N. Atlantic

18. Frontal Weather
Cyclone = low pressure area containing rising warm air . -
-winds rotate counter clockwise in Northern Hemisphere
tornados, hurricanes
Anticyclones = high pressure area
-cool, dry air rotates clockwise in N. hemisphere

19. Isobar Isobars closer together = higher winds - Iso= same-
Iso= same
Isobar = lines that connect points of equal air pressure
closer the line, the stronger the wind
Isobars closer together = higher winds

20. Isobar Map

21. Isotherm - Isotherm = lines that connect points of equal temperature
use color for each decade of #’s
reds are warm / blues are cooler

22. Isotherm Map

23. Predicting Weather Generally- --
-US weather moves from W to E because US is in the “westerlies” global wind pattern
Low pressure spins counter clockwise
High pressure spins clockwise

24. Predicting Weather -High pressure = clear weather
Low pressure = cloudy/stormy weather
Significant temp change (decrease) and significant pressure change down = may cause severe weather

25. Weather Instruments Thermometer – air temp -Anemometer – wind speed
Barometer – air pressure
Psychrometer – humidity
Rain gauge – rain fall amount
Wind sock/vane – wind direction