Record cold May through July over parts of the U.P.

...Record Chill Over Parts of the U.P. in May Through July...

 

The mean upper trough from Hudson Bay to the Great Lakes that brought a northwest flow of unseasonably cool air to Upper Michigan for much of May through June 2009 remained the dominant influence again in July. The result was a third cool month in a row with mean monthly temperatures generally ranging from 4 to 6 degrees below normal. In fact, July 2009 goes down in the record books as one of the top two or three coolest July’s on record almost everywhere in the U.P. and just a few degrees warmer than the notoriously chilly month of July 1992, which remains the record coolest at most locations. But at Munising, July this year is now the coolest on record with an average temperature almost 0.5 degree lower than in

July 1992.

 

The May through July 2009 3-month mean temperature is also now one of the top ten lowest on record at many spots across Upper Michigan.  At the Marquette national Weather Service Office, this 92-day stretch is the coolest on record.

 

The following tables summarize the observed chill across West and Central Upper Michigan in July and May through July.

 

July

 

Observed Temp

Normal Temp

Depart.

Rank Coolest

Record (Previous) Coolest

Munising

58.7

64.8

-6.1

1ST

(59.1...1992)

Houghton County Airport

59.9

65.8

-5.9

2ND

59.4...1992

Marquette NWS

59.8

65.0

-5.2

2ND

58.3...1992

Newberry

59.9

65.0

-5.1

2ND

57.5...1992

Ironwood

60.5

65.5

-5.0

2ND

58.5...1992

Manistique

60.4

64.3

-3.9

2ND

57.9...1992

Iron Mtn.

63.1

67.7

-4.6

3RD

62.2...1992

Marquette City

62.5

66.1

-3.6

12TH

59.7...1992

 

                                  

 

May through July

 

Observed Temp

Normal Temp

Depart.

Rank Coolest

Record (Previous) Coolest

Marquette NWS

55.1

58.7

-3.6

1ST

(55.4...1967)

Houghton County Airport

54.8

59.1

-4.3

2ND

54.7...1958

Manistique

55.5

57.6

-2.1

5TH

53.5...1992

Munising

54.2

58.4

-4.2

7TH

51.8...1920

Newberry

55.8

58.8

-3.0

7TH

53.7...1958

Ironwood

56.9

59.6

-2.7

8TH

55.2...1915

Iron Mtn.

59.0

61.7

-2.7

11TH

56.3...1945

Marquette City

56.6

58.9

-2.3

24TH

53.6...1915

                           

                         

 THIRTY YEAR NORMALS USED ARE FOR THE PERIOD OF 1971 THROUGH 2000.

ALL CLIMATE DATA LISTED IN THIS PRODUCT ARE UNOFFICIAL. FOR OFFICIAL

DATA...PLEASE REFER TO THE NATIONAL CLIMATIC DATA CENTER.

 

 



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