Flood Risk and Vulnerability Analysis Project - Atlantic Climate ...

Development of Projected Intensity-Duration-Frequency Curves
for Corner Brook and Goulds/Petty Harbour, Newfoundland May 16, 2012
Table 2-8 - Historical Climate Data Elements
Element Description
Mean Max Daily Temp (°C)
Mean Daily Temp (°C)
Mean Min Daily Temp (°C)
Extreme Monthly Max Temp (°C)
Extreme Monthly Min Temp (°C)
Monthly Total Rain (mm)
Monthly Total Snow (cm)
Monthly Total Precip (mm)
Snow on Ground Last Day (cm)
Direction of Max Gust (10's deg)
Speed of Max Gust (km/h)
Data for all elements were available on a daily timestep. Table 2-9 summarizes the
period of record, monthly total precipitation and monthly average temperature for the
three stations.
Table 2-9 - Summary of Availability of Historic Monthly Data
Deer Lake, 8401501 Stephenville A, 8403800 St John's A, 8403506
Month
Total Mean Total Mean Total Mean
Precip Temp Precip Temp Precip Temp
(count) (count) (count) (count) (count) (count)
Jan 69 72 69 69 70 70
Feb 71 73 69 70 70 70
Mar 71 72 70 70 70 70
Apr 70 72 67 70 69 69
May 70 70 67 69 70 70
Jun 70 72 68 69 69 69
Jul 72 72 69 69 69 69
Aug 68 70 69 69 69 69
Sep 70 70 68 69 69 69
Oct 69 71 68 69 69 69
Nov 70 71 68 69 69 69
Dec 70 73 69 69 69 69
First Year of Data 1933 1933 1942 1942 1942 1942
Last Year of Data 2005 2005 2010 2010 2010 2010
Note: While datapoints are shown for all months, correspondence with Environment Canada staff
indicated precipitation data for these stations are only valid from May to October. The stations have not
been equipped with heating elements to allow them to measure snowfall water equivalent accurately.
Figure 2-1 shows the Deer Lake and Stephenville A stations to be approximately
equidistant from the Corner Brook site. Further detailed meteorological analysis
suggests that the Deer Lake site is considered more representative of the rainfall
patterns over the Corner Brook watersheds. As shown in Figure 2-5, the Public
Forecast Warning Areas used by Environment Canada place the Deer Lake station
AMEC Environment & Infrastructure 12