# How To Read A Weather Map Worksheet

Contents

## How do you read weather data?

These common weather station symbols represent the current weather conditions. A dot is used for rain and an asterisk for snow with the number of dots or asterisks indicting to what extent it is happening. For example 2 dots is light rain 3 dots is moderate rain and 4 dots means there is heavy rainfall.

## What do the symbols on a weather map mean?

The large letters (Blue H’s and red L’s) on weather maps indicate high- and low-pressure centers. They mark where the air pressure is highest and lowest relative to the surrounding air and are often labeled with a three- or four-digit pressure reading in millibars.

## How do you read 500mb weather map?

For a given location if the 500 mb height on the map is close to average then the temperature is expected to be about average. If the 500 mb height is lower than the average height then lower than average temperatures are expected.

See also if the sun is in space why is it dark

## How do you read wind on a weather map?

The dot end of the staff is where the wind is blowing to while the top of the staff shows the direction from which the wind is coming. The top row of wind barbs in the figure to the right all indicate a north wind. The dot is to the south and the top of the wind barb staff is to the north.

## What do the red and blue lines mean on a weather map?

On a weather map a warm front is usually drawn using a solid red line with half circles pointing in the direction of the cold air that will be replaced. … On a weather map a cold front is usually drawn using a solid blue line with triangles pointing in the direction of the warm air that will be replaced.

## How do you identify the fronts on a weather map?

To locate a front on a surface map look for the following:
1. sharp temperature changes over relatively short distances
2. changes in the moisture content of the air (dew point)
3. shifts in wind direction
4. low pressure troughs and pressure changes and.
5. clouds and precipitation patterns.

## How do you read weather highs and lows?

The forecast high is the highest temperature expected to occur that day which in most cases is in the afternoon. The forecast low is the lowest temperature expected to occur during the next overnight period and on the vast majority of days will occur around daybreak the following morning.

## What are the lines on a weather map?

Isobars: lines of constant pressure. A line drawn on a weather map connecting points of equal pressure is called an “isobar”. Isobars are generated from mean sea-level pressure reports and are given in millibars.

## What are the four weather symbols?

Basic weather symbols include:
• Sunny skies.
• Partly cloudy.
• Cloudy.
• Windy.
• Rainy.
• Fog.
• Snow and.
• Thunderstorms.

## What is a 500 millibar chart?

The 500mb chart is a constant pressure chart which means that everywhere on the chart the air pressure is the same (500mb). This occurs in our atmosphere on average at a height of about 5600 meters or about 18 000ft above sea level but varies from place to place due to the density of the air column.

## What is a 500 hPa charts?

What are 500 hPa and thickness charts? … The height at which the pressure is 500 hPa roughly divides in half the atmosphere vertically half the mass of air being above and half below that height. In terms of height 500 hPa is about 5 500 metres (18 000 feet) above the ground.

## How do you read a wind report?

Wind direction is usually reported in cardinal (or compass) direction or in degrees. Consequently a wind blowing from the north has a wind direction referred to as 0° (360°) a wind blowing from the east has a wind direction referred to as 90° etc.

## What direction is ENE wind?

East-Northeast

Cardinal Point Abbreviation Azimuth Degrees
East-Northeast ENE 67.50°
East by North EbN 78.75°
East E 90.00°
East by South EbS 101.25°

## How many knots is a hurricane?

64 knots

Hurricane: A tropical cyclone with maximum sustained winds of 74 mph (64 knots) or higher. In the western North Pacific hurricanes are called typhoons similar storms in the Indian Ocean and South Pacific Ocean are called cyclones.

## How is temperature shown on a weather map?

Surface weather maps show air temperature recorded at official stations. … Many maps use ​isotherms​ – lines connecting points with the same temperature – to show areas of similar temperature. Color is also useful for temperature maps: hot areas are shades of red and cold areas are blue and violet.

## What does a purple line mean on a weather map?

Occluded fronts point to a decrease in intensity of the parent weather system and are indicated by a purple line with alternating triangles and half-moons on the side of its motion. While there is no difference in how they are depicted on a weather map there are two types of occlusions cold and warm.

## What are the brown dashed lines on a weather map?

A trough of low pressure that contains significant weather phenomena (such as precipitation and distinct wind shifts) may be identified on the map by a thick brown dashed line running along the axis of the trough. On some maps this trough line may have the abbreviation “TROF”.

## What are the color codes for weather?

Is there a list of all the warnings and watches and the color codes?
Hazard / Weather Event Click on the Hazard/Weather Event For Definitions Priority Color Name
Extreme Wind Warning 3 Darkorange
Severe Thunderstorm Warning 4 Orange
Flash Flood Warning 5 Darkred

## What are the 4 types of fronts?

There are four different types of weather fronts: cold fronts warm fronts stationary fronts and occluded fronts.
• Cold Front. A side view of a cold front (A top) and how it is represented on a weather map (B bottom). …
• Warm Front. …
• Stationary Front. …
• Occluded Front.

## What does l mean on Hurricane map?

Low pressure system

L: Low pressure system – associated with rising air which causes clouds and rain. D: Tropical Depression – wind speed less than 39 mph. S: Tropical Storm – wind speed between 39 mph and 73 mph.

## What does l mean for pollen?

MSLP maxima (anticyclones) and minima (depressions) are marked by the letters H (High) and L (Low) on weather charts.

## What’s high and low pressure in weather?

A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure and the air rises in the atmosphere where they meet. … A high pressure system has higher pressure at its center than the areas around it. Winds blow away from high pressure.

## What are the pressure lines on a weather map called?

Those plain lines that curve across the map are called isobars (iso = equal bar = pressure). They join together places with the same mean sea level air pressure (weight per square area of air above).

## What does 3 wavy lines mean in weather?

The weather symbol that shows a cloud with three lines under means fog.

## Why do meteorologist use symbols and maps to analyze weather?

As we learned the station model is a way of showing a lot of weather information on a single map using numbers and symbols. That way meteorologists can glance at the map and see a lot of information quickly. … The central symbol tells you wind speed direction and cloud cover.

## Why is the 850 mb level chart important for forecasting?

For locations close to sea level the 850 mb chart represents the top (or close to the top) of the planetary boundary layer. In the PBL friction and turbulent motion eddies are common. The wind blows at a more constant speed and direction above the 850 mb level.

## What does MB mean in meteorology?

millibars

In aviation and television weather reports pressure is given in inches of mercury (“Hg) while meteorologists use millibars (mb) the unit of pressure found on weather maps. As an example consider a “unit area” of 1 square inch.

## What altitude is 700 MB?

10 000 feet

An air pressure of 700 millibars is commonly said to occur near 10 000 feet (3 100 meters) in elevation. But the height typically ranges from near 7 700 to 10 500 feet (2 350 to 3 150 meters).

## What height is 1000 hPa?

Atmospheric Thermodynamics

The scale height of the atmosphere may be taken as 8 km. Therefore with p = 1014 hPa the geopotential height Z1000 hPa of the 1000-hPa pressure surface is found to be 112 m above sea level.

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