Review of Weather, Temperatures, and Precipitation for the Quad State Region.

 

                                        Weather Summary for September 2004

 

September turned out to be a record-breaking month for dry weather.  Both Evansville and Paducah set records for the driest September on record.  September was the driest month on record for Paducah since record began in 1949.  Evansville recorded 0.09 inches and Paducah only 0.02 inches.  Other locations included Cape Girardeau, Missouri with a trace of rain and Carbondale, Illinois with 0.12 inches.  Numerous other cooperative observers also recorded less than 1 inch for the month.  Average temperatures for the month were within a degree and a half of normal (68 to 72 degrees).  

 

Several cold fronts traversed the region in September (6th-7th, 15th-16th, 24th-25th, and 27th-28th).  However, high pressure over the eastern United States and major land-falling hurricanes in Florida disrupted each frontís ability to produce precipitation.  Average precipitation amounts for these events were less than one-tenth of an inch although a few nearly stationary, short-lived storms managed to produce one-half to three-quarters of an inch.

 

Of Special Note: The Atlantic Hurricane Season continued to wreak havoc on the state of Florida.  Three hurricanes made landfall this month.  Frances and Jeanne hit the southeast coast while Ivan, a category 4 storm, slammed the panhandle.

 

Figure 1. September Average Daily Temperature Summaries (Degrees F) for Several Quad State Region Locations.

 

 

Location

 

Temp >

 

High

 

Low

 

Mean    

 

Range of

Mean Temperatures

 

Degrees from Mean

/percentile

 

Carbondale

IL

 

Normal >

2004 >

 

80.6

84.1

 

54.9

54.2

 

68.0

69.4

 

max: 72.8 in 1998

min:  62.6 in 1974

 

+1.4

69%-ile

 

Cape Girardeau

MO

 

Normal >

2004 >

 

80.7

86.0

 

58.7

60.0

 

69.9

68.4

 

max: 74.3 in 1986

min:  64.3 in 1974

 

-1.9

45

 

Evansville

IN

 

Normal >

2004 >

 

80.7

82.3

 

57.7

57.4

 

 69.5

70.1

 

max: 73.8 in 1998 min: 63.2 in 1974

 

+0.6

60

 

Paducah

KY

 

Normal >

    2004 >

 

81.5

84.2

 

58.6

56.8

 

70.3

70.7

 

max: 74.9 in 1998

min:  65.1 in 1974

 

+0.4

57

 

Poplar Bluff

 MO

 

Normal >

2004 >

 

82.2

84.3

 

59.2

59.4

 

71.0

72.1

 

max: 76.5 in 1998

min:  64.2 in 1974

 

+1.1

64

* Range of averages is taken from the range used to calculate normals: 1971-2000.    

 This gives the highest and lowest June average temperature observed during that time.

** Five years of temperature data were missing from the normal period for Evansville, one year of temp data was missing from Poplar Bluff and Carbondale.

   

Figure 2. September Average Monthly Precipitation (inches) and September 2004 Observed Precipitation for Several Quad State Region Locations

 

 

             Location

 

        

 

Total*

Precip.

 

2004

diff

 

  Range**

(within normal period)

 

%-ile

 

 

Carbondale, IL

  (near record low)

 

Normal >2004 >

 

   3.02

0.12

 

 

-2.90

 

   max:   9.52 in 1993

   min:    0.16 in 1978

 

0

 

Cape Girardeau, MO

  (record low)

 

Normal > 2004 >

 

   3.45

 Trace

 

 

-3.45

 

   max: 10.23 in 1993

   min:    0.48 in 1999

 

0

 

Evansville, IN

  (record low)

 

Normal >

 2004 >

 

   2.99

   0.09

 

 

-2.90

 

   max:   8.45 in 1996

   min:    0.39 in 1999

 

0

 

Paducah,  KY

  (record low)

 

Normal >

2004 >

 

   3.56

   0.02

 

 

-3.54

 

   max:   9.23 in 1985

   min:    0.12 in 1998

 

0

 

Poplar Bluff, MO

  (record low)

 

Normal >

2004 >

 

   3.41

   0.01

 

 

-3.40

 

   max: 11.61 in 1993

   min:    0.44 in 1999

 

0

* Total precip. Includes melted solids.

** Range is the highest and lowest September precipitation observed within the period used to calculate normals: 1971-2000.

*** Missing normal precipitation data: One year missing from Carbondale data, 2 years

       missing from Cape Girardeau data.

 

                                                                                               


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