Weather and Weather Prediction Notes

Weather___________= the condition of the

_____________at a particular _______and _______

Weather ___________= a _____________of ___________weather conditions over the next _________days

Weather

atmosphere tim

e

place

Forecast

prediction futur

e 3 to 5

Weather Station ModelDiagram outline of station model: (pg. 105)  _____ __________ _____________.  __________ ____________ 

Temp

Pressure

Weather Cond

Dew Point

Precip amt

Surface station modelSurface observation data station model: -located on map where _________was

locatedEX.

data

Cloud CoverCloud cover = shade in circleEX.

Wind Direction_________direction = ______in ___________wind

is coming _________EX.

Wind line direction FRO

M

Wind speedWind speed =Ex.

Pressure- measured in __________(mbar)

# 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…..1034.7

EXAMPLES

millibars

greater

9

decimal

less 10 right

________________= measure of how _______or _________something is

_______Point = the _____________air must ________to be completely____________

Saturated: reached moisture compacity

Temperature

hot

cold

Dew temperature cool saturat

ed

ExamplesTurn to page 105

Your turn

Fronts

Fronts = leading _______of an ______mass/_________

edge

air boundary

Warm FrontWarm = _______air replacing __________air -weather = (indicated________________) a. ________clouds –_______, feathery, found

at ________altitudes  b. _________-clouds that form in __________  -nimbostratus  c. steady _____________________ d. _____________temp

warm cooler snow/

raincirrus

thinhigh

stratus layers

precipitationincreased

Cold Front________= cool air ____________warmer airweather =____________clouds- ___________white clouds,

tend to have _________bottoms -cumulonimbus ________showers___________temp

Cold replacing

cumulous

puffy

flat

brief

decreased

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

offgroundsevere

Stationary front___________= _______air masses can not

_______other ______of way -weather = _________rain until moves out

Stationary

two

push out

steady

Frontal Weather  ..

Continental tropical (cT) = warm, dry —Mexico, SW US

Continental polar (cP) = cold, dry -- Canada

Air mass = a large amount of air that takes on the temperature and humidity of the area it forms over

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

Anticyclones = high pressure area-cool, dry air rotates clockwise in N.

hemisphere

tornados, hurricanes

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 WeatherGenerally- 

-

-

-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 – humidity

Rain gauge – rain fall amount

Wind sock/vane – wind direction