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November 2013 - Report and Summary

The month of November 2013 was much cooler and slightly wetter than normal. Compared with November 2012, the month was 4.9 deg. Cooler and 4.16 inches wetter. Year-to-date rainfall through November 30 was 9.63 inches greater in 2013 than in 2012. Twelve-month rainfall went above normal in November 2013.

The thirty-day outlook had called for near normal temperatures and near normal precipitation. When revised at the end of October, the outlook was changed to predict above normal temperatures and above normal precipitation.

The month began cool, with below normal temperatures continuing through the 15th. The first freeze of the season came on the 13th, ending the growing season a couple of days early at 232 days.

A storm system crossed between the 4th and 6th with widespread rain. A weaker system crossed on the 15th with light rain.

A sharp warm-up came between the 16th and 18th, with a cool-down on the 19th and 20th, followed by another short-lived warm-up on the 21st. And then came a major change. An upper air low, with numerous disturbances, emerged onto the Plains from the southwest on the 22nd, retreated on the 23rd, and then crossed between the 24th and 26th. Arctic air moved into the area on the 22nd, and was strongly reinforced on the 26th.

The result was widespread heavy rainfall between the 22nd and 26th, with storm totals of between three and seven inches. Temperatures ran up to 20 degrees below normal from the 22nd through the morning of the 28th.

A slow warm-up began on the 28th and continued through the end of the month with dry weather.

The reporting period for temperatures and phenomenon on each day is for the twenty-four hours ending at midnight hours GMT--6 p.m. CST and 7 p.m. CDT. The reporting period for precipitation is for the twenty-four hours ending at noon GMT--6 a.m. CST and 7 a.m. CDT. All times are given using the twenty-four hour clock, and are expressed in Greenwich Mean Time.

Observations are from NWS Station 41/9207/4 in Tyler, Texas. The term "normal" refers to averages from the standard climatic period 1971-2000.

November 2013



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