Download Weather Prediction PPT

Weather
Weather
atmosphere
 ___________=
the condition of the _____________at
a
particular _______and
_______
time
place
Forecast
prediction
 Weather ___________=
a _____________of
future
___________weather
conditions over the next
3 to 5
_________days
Weather Station Model
 Diagram outline of station model: (pg. 105)


Temp
_____
Pressure
__________

 Weather
_____________.
Cond



Dew Point
__________
Precip amt
____________
Surface station model
 Surface observation data station model:

 EX.
-located on map where _________was
located
data
Cloud Cover
 Cloud cover = shade in circle
 EX.
Wind Direction
Wind
direction
 _________direction
= ______in
___________wind
is
line
coming _________
FROM
 EX.
Wind speed
 Wind speed =
 Ex.
 Pressure- measured in __________(mbar)
millibars
9
greater
 # is _________than
500, put a ____in front and a
decimal
___________one
place from the right

Ex. 802….980.2
10
less
 # is ________than
500, put a _____in
and a decimal one place
right
from the _________

Ex. 347…..1034.7
 EXAMPLES
Temperature
 ________________=
measure of how _______or
hot
_________something
is
cold
Dew
temperature
 _______Point
= the _____________air
must
cool
saturated
________to
be completely____________

Saturated: reached moisture compacity
Examples
 Turn to page 105
 Your turn
Fronts
edge
air
boundary
 Fronts = leading _______of
an ______mass/_________
Warm Front
 Warm = _______air
replacing __________air
warm
cooler
snow/rain

-weather = (indicated________________)
cirrus
thin feathery, found at

a. ________clouds
–_______,
________altitudes
high







stratus
layers
b. _________-clouds
that form in __________
-nimbostratus
precipitation
c. steady _____________________
increased
d. _____________temp
Cold Front
replacing
 ________=
cool air ____________warmer
air
Cold
 weather =
cumulous
puffy
 ____________clouds___________white
clouds, tend
flat
to have _________bottoms

 -cumulonimbus

brief
 ________showers
decreased
 ___________temp
Occluded Front
Occluded
 __________=
(type of cold front) cold front
____________up
with warm front
catching
cuts off
ground

-“_________”
warm air mass from ___________
severe

-_________weather



a. high wind
b. hail
c. lightening
d. tornado
e. heavy rain
Stationary front
Stationary
two
 ___________=
_______air
masses can not
_______other
______of
way
push
out
steady

-weather = _________rain
until moves out
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
Frontal Weather
Maritime tropical (mT) = warm, moist – S.

Pacific, S. Atlantic
 . Maritime polar (mP) = cold, moist – N. Pacific, N.
Atlantic
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
.
Isobar
 Iso= same
 Isobar = lines that connect points of equal air pressure
 - closer the line, the stronger the wind
Isobars closer together = higher winds
Isobar Map
Isotherm
 Isotherm = lines that connect points of equal
temperature
 - use color for each decade of #’s

- reds are warm / blues are cooler
Isotherm Map
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
Predicting Weather
-
-High pressure = clear weather
 - Low pressure = cloudy/stormy weather
Significant temp change (decrease) and
 - significant pressure change down = may cause
severe weather
Weather Instruments
 - Thermometer
– air temp
-Anemometer – wind speed
 - Barometer
– air pressure
 - Psychrometer –
 - Rain gauge
humidity
– rain fall amount
 - Wind sock/vane – wind
direction