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Local 3-Month Temperature Outlook Pie Chart Table
The Local Three-Month Temperature Outlook (L3MTO) Table provides numeric data for the
L3MTO Pie Chart for the upcoming year thirteen three-month periods. The Table offers
expected chance for the average three-month temperature to occur in one of three temperature categories: Above,
Near or Below Normal. The categories are based on observations from the present climatological reference period
of 1981 through 2010. During this 30-year period, temperatures were in the Below Normal category 1/3 (33.3%) of
the time, in the Near Normal category 1/3 (33.3%) of the time, and in the Above Normal category 1/3 (33.3%) of
the time. In other words, during 1981-2010, there was an Equal Chance (EC) for the average three-month temperature
to fall in any one of the three categories. The local station outlooks reflect a change in these odds, based on the
National Three-Month Temperature Outlook.
The Table consists of 14 rows and 7 columns. The first row is the title row. The first column of rows from 2
to 14 specifies the three-month periods. Columns 2 through 7 are grouped in pairs. Each pair displays information
for a forecast category, as follows: column 2 shows expected probability and column 3 shows reference temperature
for the Below Normal Category; in a similar manner, columns 4 and 5 show expected probability and reference
temperature respectively for the Near Normal Category, and columns 6 and 7 show expected probability and reference
temperature respectively for the Above Normal Category.
The Table is shaded to highlight the three-month period and corresponding category with significantly enhanced
chance (38.5% or more): the shading is blue, gray, or red, respectively, if the Below, Near, or Above Normal
category has a significantly enhanced chance. No shading on a row indicates that the expected chance breakdown
between the categories is roughly Equal Chance (EC).