Rainfall intensities at seven Canadian cities

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Rainfall intensities at seven Canadian cities

Sex

TKL

B92

no.

15

c .

2

BLDG

RAINFALL

INTENSITIES AT

SEVEN

CANADIAN

C T T B S

by

D,W,

Boyd

,

Climatalogist,

D.B.R,,

with Climatology Section,

MeteorolagLcaI Division,

Department

of

T r a n s p o r t ,

Toronto,

Ontario.

These

data

were

prepared

for the

Division

of

Building Research

from

records

on

file

at

the

offices of

the

Climatological Services,

Meteocological Division,

Department of

T r a n s p o r t ,

T o r o n t o ,

?r -2> 7 . a + ; -%

1.

-

RAINFALL

INTENSITIES A!F

SEVEN

C A N A D M C.ITIES

The

mount

of

r a i n that

f a l l s each day

i g

measured at a b o u t

f~urteen

hundred

stations

in Canada,

but

very few of these stattons have recording r a l n

gauges

f r o m which r a i n f a l l

amounts

f o r

shorter

pe6itods

of time

can

be obtained,

Only

five s t a t i o n s

have

these

data

f o r

elght y e a r s

or

_{more in tbe}

p e r f o d

from 1941

t o

1954,

The table gives the

r n a x h u m

amounts

of

r a i n ,

in

inches, which

occurred

in

p e r i o d s

of

5 ,

10,

15,

20

_and

30

minutes

_in

each

month,

The

f i r s t

line

f o r

each

s t a t i o n

indicates

the

number

of

years

o r

records which were avail-

a b l e

for each

month,

Standard

r a i n

gauges

are

left out

a311

y e a

round but

the recording gauges

a r e

frequently

covered during

the

wlI$.ter,

Hence

there

atre

fewer winter

r e p o r t s ,

"T"

indfc~tes

l e s s t h a n -01

inch,

The maximum r a i n f a l l s reported

fn

fifteen

y e a r s

f o r each

af these s h o r t

p e r l o d s

are

given

fn the l a s t

column,

It

is interesting

t h a t

these

m

o

m

i n t e n a i t f e s

occur

in

June

or July at

the

inland

c l t i e s

and

in August

at the

c o a s t a l

c i t i e s o

RAINFALL

I X T E I I S

I T I E S

Vaneau~sr

Yra. of Kacord

9

q

3

9

8

R

8

8

Pariod

6

7

7

6

5

Mkn.

10

"

e Q 3

*Q5

-09

-05

.lo

6

.la

.07

,09

15

'*

:

e 0 6

so9

SOB

el.4

.I8

.20 .10

mo7

-20

20

₁₁₀

*"

m a s

_.I1

*I5

e l 4

-18

r 2 2

*20 .23 .20

,09

.23

20

"

_-14

5

.I7

012

.I8

-23 .27

a 1 7

.21

'2;

.

020

_-30

w23

_.26

-25

_{2 9 .17}

.I2

Edmonton

YPB.

of

Record

5

2

4.

11

11

If

II

U

10

P e r i o d

8

7

6

Reaina

T r s .

of

Record

0

O

₀

₁

₃

₁

_~

₂

₂

₂

₂

₀

₀

P e r i o d

Taront

o

Yra.

of

Record

11

10

13

14

15

15

15

15

15

15

11

Period

SMtn*

*o9

-05

-18

e29

4

034

a 5 6

m37

-16

a 1 0

*O9 e 5 6

10

"

e l 3

r 0 6

e 6 2 e 9 1

058

5

m2O

e 2 2

a 1 1

w9I

15

a 1 5

eO8 127

-66

.941.1

*72

028

m29

-12

1.1

20

rn

e l 8 .11 e 2 9

.42

.69

1.01

1.2$

.RI

iig

0 %

I.$

36

"

-19

.15 .38

.42

,70

1.20

1,4

1.08

:

_.38

.I9

1.4

Dorval

-of'

Record

0

Pariod

5

M h

10

"

15

"

26

"

30

"

Halifax

Frs.

o f

R e c o d

7

Yariod

Gmdsr

maf

Raoord

0

0

0

0

0

1

Pariod

5

MI&

.I8