Coon Creek Watershed District

2020 Comprehensive Plan

CCWD Climate & Precipitation

Chapter

Review of current chapter

CLIMATE/PRECIPITATION

Update data set to be more geographically representative of the District

Analyze data and bring statistics & trends up-to-date

Review trends and their implications

Review of current chapter

DATA

Use MN Climatology Website to retrieve Daily and Monthly Precipitation & Temperature Data for the District

Review of current chapter

TEMPERATURE

Updated TempStatistics &Trends

Average Annual Temp (1960-2009)

y = 0.0292x + 43.40636.0

38.0

40.0

42.0

44.0

46.0

48.0

50.0

1960

1963

1966

1969

1972

1975

1978

1981

1984

1987

1990

1993

1996

1999

2002

2005

2008

Years from 1960D

eg

rees (

F)

Avg Linear (Avg)

Average Temps

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Month

Tem

p (

F)

Avg

Review of current chapter

PRECIPITATION

Updated PrecipStatistics &Trends

1.0 0.8

1.7

2.6

3.7

4.5

3.84.1

3.3

2.6

1.7

1.1

0.00

1.00

2.00

3.00

4.00

5.00

6.00

Pre

cip

(in

.)

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Month

Average Monthly Precip

Average 3 Years in 10 More than 3 Years in 10 Less than

Annual Precipitation

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00

45.00

50.00

1963

1966

1969

1972

1975

1978

1981

1984

1987

1990

1993

1996

1999

2002

2005

2008

Pre

cip

(in

.)Annual Annual Avg

Review of current chapter

PRECIPITATION

ApplicableTrends

Annual Precipitation (Last Decade)

y = -0.4053x + 33.5350.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00

45.00

1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

Pre

cip

(in

.)Annual (Last decade) Linear (Annual (Last decade))

Frequency of 1.0"+ Events

y = 0.0004x + 0.05260.0%

2.0%

4.0%

6.0%

8.0%

10.0%

12.0%

14.0%

1963

1966

1969

1972

1975

1978

1981

1984

1987

1990

1993

1996

1999

2002

2005

2008

% o

f an

nu

al

even

ts e

xced

ing

1.0

"

Annual %Linear (Annual %)

Implications Of Changes In Precipitation

2.Less annual precipitation

4.Greater occurrence of larger events

6.Less naturally-occurring infiltration

Expectations Of Changes In Precipitation

Volume management becomes critical component to surficial aquifer & water quality management

NeedsIncrease volume management requirement to 1.5”?