Radar - Long Descriptions

Table of Contents

Image 2.1. National View of Weather radar animated graphic for Canada

A map of Canada showing the coverage zones of Environment Canada’s radar stations. The map also explains all the labeling elements that are found on a typical national view radar image.

The radar image can be broken down into  3 main sections:

  1. Time stamp
  2. RADAR image
  3. Intensity Scale

1. Time stamp

Sample of Time Stamp: 2006-08-14, 15:00 UTC, 7/7

The black bar above the radar map is a timestamp, listing date first, then time in Coordinated Universal Time (UTC), the position of the viewed image, and the total number of images.

2. Radar image

The sample RADAR image shows where all the radar sites are located in Canada.

Each circle represents the coverage of one radar site. 1 cm represents 400km in distance.

The radar sites are denoted with a black dot. The following major cities are covered in the national view:

  • Vancouver, British Columbia
  • Edmonton, Alberta
  • Calgary, Alberta
  • Regina, Saskatchewan
  • Winnipeg, Manitoba
  • Sudbury, Ontario
  • Toronto, Ontario
  • Ottawa, Ontario
  • Montreal, Quebec
  • Quebec City, Quebec
  • Halifax, Nova Scotia
  • St. John's, Newfoundland

3. Intensity Scale

The Intensity scale on the bottom left hand of the map shows:

  • Light green as the lightest intensity
  • Dark Green to Pink as moderate intensity
  • Purple as heavy intensity.

Image 2.2. Regional View of weather radar animated graphic for stations located in a region.

A sample radar image composite of all the Radar stations in Atlantic Canada. The map also explains all the labeling elements that are found on a typical regional view radar image.

The radar image can be broken down into 3 main sections:

  1. Time stamp
  2. RADAR image
  3. Map legend

1. Time stamp

Sample of Time Stamp: 2006-08-15, 19:40 UTC, 7/7M

The black bar above the radar map is a timestamp, listing date first, then time in Coordinated Universal Time (UTC), the position of the viewed image, and the total number of images.

2. RADAR image

The RADAR imageshows where all the radar sites are Atlantic Canada. Each circle represents the coverage of one radar site.

1 cm represents 100 km in distance.

The 4 radar sites in Atlantic Canada cover the following cities:

  • Rimouski, Quebec
  • Edmunston, New Brunswick
  • Frederiction, New Brunswick
  • Halifax, Nova Scotia
  • Sydney, Nova Scotia
  • Charlottetown, Prince Edward Island
  • Corner Brook, Newfoundland
  • Gander, Newfoundland
  • St. John's, Newfoundland

3. Map legend

The map legend to the right of the map shows:

  • The regional radar view: Radar - Atlantic
  • Universal Coordinated Time: 1940 UTC:
  • Date of radar capture: 20006-08-15 :
  • Scale: 3.5km/pixel
  • Intensity Scale of rain as read by the radar signal.

The intensity scale to the right of the map shows the amount of precipitation that has been detected by the radar. It is measured by decibels relative to Z (dB-Z). The Z is a measure of equivalent reflectivity (Z) of a radar signal reflected off a remote object.

The scale on the left starts from 0.1 mm/hr of rain and goes up 200 mm/hr.

The scale on the right starts from 10 dB-Z and goes up to 61 dB-Z.

Image 2.3 Local View of a weather radar graphic for a station

A sample radar image composite from the station in Chipman, New Brunswick. The image also explains all the labeling elements that are found on a typical local view radar image.

The radar image can be broken down into 3 main sections:

  1. Time stamp
  2. RADAR image
  3. Map legend

1. Time stamp

The black bar above the sample map shows the following:

  • Radar product:  PRECIP-Rain
  • Local Time: 20006-08-15, 3:50 PM ADT
  • Position of the viewed image and the total number of images: 7/7

2. RADAR image

The sample radar image shows the coverage area for the Chipman, NewBrunswick radar.

Each ring around is spaced 40 km apart. The red circle defines the outer limit of the radar coverage which is 250km.

The Chipman, NB radar encompasses the following areas:

Within an 80 km radius:

  • Doaktown, NB
  • Moncton, NB

Within a 120 km radius:

  • Miramichi, NB
  • Saint John, NB

Within a 160km radius:

  • Bathurst, NB
  • Summerside, PEI

Within a 200 km radius:

  • Charlottetown, PEI
  • Digby, NS
  • St. Stephen, NS
  • Grand-Sault, NB

Within a 240 km radius:

  • Truro, NS
  • Grand Falls, NB

3. Map legend

The map legend to the right of the map shows:

  • Name of the radar and ID code: Chipman XNC
  • Time in Coordinated Universal Time (UTC): 1850 UTC
  • Date of radar capture: 20006-08-15
  • Scale: 1 km/pixel
  • Distance Scale. 1 cm represents 40 km
  • Graduated Intensity Scale of rain as read by the radar signal.
  • Noise: 57.72 - Technical parameters used by technicians to diagnose the operation of the radar.

The Graduated intensity scale to the right of the map shows the amount of precipitation that has been detected by the radar. It is measured by decibels relative to Z (dB-Z). The Z is a measure of equivalent reflectivity (Z) of a radar signal reflected off a remote object.

The scale on the left starts from 0.1 mm/hr of rain and goes up 200 mm/hr.

The scale on the right starts from 7 dB-Z and goes up to 60 dB-Z.