Weather Report for 1st Half of Year: Half of the Bay Colder. Half Average.

The National Weather Service reports that overall weather in the U.S. was a bit more extreme during the first half of the year. Here on the Chesapeake Bay, the Western Shore experienced slightly colder temps than normal, while the Eastern Shore stayed at a normal level.

Climate.gov says it was an usual first half of the year.

“Never before have such large areas of the country experienced such radically different temperature extremes as they have so far this year,” says Climate.gov.

The map below shows just how divergent the temperature patterns have been across the contiguous United States for January-July 2014.

NOAA weather map

The graph below shows January-July temperature extremes in a different way: the bars represent the percent of the country experiencing extremely warm or cold average maximum temperature (“daytime high”) during the first part of each year since 1910.  For this analysis, an extreme means in the top or bottom 10% of the historical range of values recorded for a location.

Graph of percent U.S. area affected by extremes in maximum temperature (red is warm, blue is cool) in January-July 2014, based on data from the U.S. Climate Extremes Index (Step 1) from the National Climatic Data Center.

Usually, temperature extremes are more lopsided, with a portion of the country mostly red or mostly blue. But it’s not unheard; a handful of years have a pattern similar to 2014—in which more than 10 percent of the country was experiencing extreme warmth while a similarly large or larger area experienced extreme coolness.

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