# Calculation Information for 1981 to 2010 Canadian Normals Data

## Notices:

The Notice Inventory contains a record of all past and current Notices.

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Statistics listed below are provided as a guide to determine the validity of Normals and Extremes calculations. For example, a station with 30 years of record between 1981 and 2010 with no missing years would be a more reliable normal than a station with 15 years of record and 2 missing years. Less than 100% possible observations indicates that out of the total number of observations used, some records were missing.

GANDER INT'L A | |||
---|---|---|---|

Province: | NL | Latitude (dd mm): | 48 56 N |

Country: | CAN | Longitude (ddd mm): | 5434 |

Time Zone: | NST | Latitude (decimal degrees): | 48.95 N |

Climate ID: | 8401700 | Longitude (decimal degrees): | -54.58 |

WMO ID: | 71803 | Elevation (m): | 151.2 |

TC ID: | YQX |

## Temperature

Temperature | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

Daily Average (°C) | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Standard Deviation | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Daily Maximum (°C) | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Daily Minimum (°C) | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Extreme Maximum (°C) | 1937 | 2010 | 26984 | 99.8 | ||

Extreme Minimum (°C) | 1937 | 2010 | 27001 | 99.9 |

## Precipitation

Precipitation | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

Rainfall (mm) | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Snowfall (cm) | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Precipitation (mm) | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Average Snow Depth (cm) | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Median Snow Depth (cm) | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Snow Depth at Month-end (cm) | 1981 | 2010 | 30 | 0 | 360 | 100 |

Extreme Daily Rainfall (mm) | 1937 | 2010 | 27008 | 99.9 | ||

Extreme Daily Snowfall (cm) | 1937 | 2010 | 27008 | 99.9 | ||

Extreme Daily Precipitation (mm) | 1937 | 2010 | 27008 | 99.9 | ||

Extreme Snow Depth (cm) | 1955 | 2010 | 20454 | 100 |

## Days with Maximum Temperature

Days with Maximum Temperature | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

<= 0 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

> 0 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

> 10 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

> 20 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

> 30 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

> 35 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

## Days with Minimum Temperature

Days with Minimum Temperature | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

> 0 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

<= 2 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

<= 0 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

< -2 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

< -10 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

< -20 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

< - 30 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

## Days with Rainfall

Days with Rainfall | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

>= 0.2 mm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

>= 5 mm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

>= 10 mm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

>= 25 mm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

## Days With Snowfall

Days With Snowfall | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

>= 0.2 cm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

>= 5 cm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

>= 10 cm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

>= 25 cm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

## Days with Precipitation

Days with Precipitation | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

>= 0.2 mm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

>= 5 mm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

>= 10 mm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

>= 25 mm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

## Days with Snow Depth

Days with Snow Depth | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

>= 1 cm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

>= 5 cm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

>= 10 cm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

>= 20 cm | 1981 | 2010 | 30 | 0 | 10957 | 100 |

## Wind

Wind | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

Speed (km/h) | 1981 | 2010 | 30 | 0 | 262880 | 100 |

Most Frequent Direction | 1981 | 2010 | 30 | 0 | 262881 | 100 |

Maximum Hourly Speed (km/h) | 1953 | 2010 | 508328 | 100 | ||

Maximum Gust Speed (km/h) | 1955 | 2010 | 20228 | 98.9 | ||

Days with Winds >= 52 km/h | 1981 | 2010 | 30 | 3 | 9444 | 86.1 |

Days with Winds >= 63 km/h | 1981 | 2010 | 30 | 3 | 9444 | 86.1 |

## Degree Days

Degree Days | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

Above 24 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Above 18 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Above 15 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Above 10 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Above 5 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Above 0 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Below 0 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Below 5 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Below 10 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Below 15 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

Below 18 °C | 1981 | 2010 | 30 | 0 | 10957 | 100 |

## Evaporation

Evaporation | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

Lake Evaporation (mm) | 1981 | 1999 | 19 | 2 | 2168 | 94.6 |

## Bright Sunshine

Bright Sunshine | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

Total Hours | 1981 | 2008 | 22 | 6 | 191376 | 98.6 |

Days with measurable | 1981 | 2008 | 22 | 6 | 191376 | 98.6 |

% of possible daylight hours | 1981 | 2008 | 22 | 6 | 191376 | 98.6 |

Extreme Daily | 1951 | 2009 | 335235 | 99 |

## Humidex

Humidex | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

Extreme Humidex | 1953 | 2010 | 508328 | 100 | ||

Days with Humidex >= 30 | 1981 | 2010 | 30 | 0 | 262880 | 100 |

Days with Humidex >= 35 | 1981 | 2010 | 30 | 0 | 262880 | 100 |

Days with Humidex >= 40 | 1981 | 2010 | 30 | 0 | 262880 | 100 |

## Wind Chill

Wind Chill | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

Extreme Wind Chill | 1953 | 2010 | 508328 | 100 | ||

Days with Wind Chill < -20 | 1981 | 2010 | 30 | 0 | 262880 | 100 |

Days with Wind Chill < -30 | 1981 | 2010 | 30 | 0 | 262880 | 100 |

Days with Wind Chill < -40 | 1981 | 2010 | 30 | 0 | 262880 | 100 |

## Humidity

Humidity | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

Average Vapour Pressure (kPa) | 1981 | 2010 | 30 | 0 | 262880 | 100 |

Average Relative Humidity - 0600LST (%) | 1981 | 2010 | 30 | 0 | 10955 | 100 |

Average Relative Humidity - 1500LST (%) | 1981 | 2010 | 30 | 0 | 10954 | 100 |

## Pressure

Pressure | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

Average Station Pressure (kPa) | 1981 | 2010 | 30 | 0 | 262871 | 100 |

Average Sea Level Pressure (kPa) | 1981 | 2010 | 30 | 0 | 262873 | 100 |

## Visibility (hours with)

Visibility (hours with) | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

< 1 km | 1981 | 2010 | 30 | 4 | 241080 | 91.7 |

1 to 9 km | 1981 | 2010 | 30 | 4 | 241080 | 91.7 |

> 9 km | 1981 | 2010 | 30 | 4 | 241080 | 91.7 |

## Cloud Amount (hours with)

Cloud Amount (hours with) | ||||||
---|---|---|---|---|---|---|

Begin Year | End Year | Total Number of Years | Missing Years | Total Count of Observations | % of Possible Observations | |

0 to 2 tenths | 1981 | 2010 | 30 | 4 | 241080 | 91.7 |

3 to 7 tenths | 1981 | 2010 | 30 | 4 | 241080 | 91.7 |

8 to 10 tenths | 1981 | 2010 | 30 | 4 | 241080 | 91.7 |

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