Weather and Weather Prediction Notes
Download
Report
Transcript Weather and Weather Prediction Notes
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