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November 2015 - Report and Summary

The month of November 2015 was slightly warmer and much wetter than normal. In fact, November 2015 becomes the fifth wettest November since records began in 1896. It replaces 1987 when 8.22 inches of rain fell. The thirty-day outlook had called for near normal temperatures and above normal precipitation. The October 31 revision made no changes. November 2015 was 5.37 inches wetter than November 2014; year-to-date rainfall was 22.38 inches more in 2015 than in 2014. November 2015's average temperature was 5.3 degrees warmer than that in November 2014.

El Nino was in full throat during much of the month. Frequent storm systems brought widespread and sometimes heavy rains to the region, with periods of cool and dry weather for a few days in between each crossing storm system. The late-October system continued into the 2nd,. This was followed by a system leaving between two and five inches of rain between the 6th and 8th. A fast-moving system on the 11th brought between one-fourth and three-fourths of an inch of rain to the area except for Tyler which received an inch and a half in one hour.

Another system came through between the 15th and 17th. It brought between one and four inches of rain to the area. The heaviest amounts, between four and eight inches, fell over northern Nacogdoches, southern Rusk, northeastern Angelina, and southeastern Cherokee Counties. A Pacific cold front arrived on the 17th, followed by an Arctic front on the 21st. The result was cooling temperatures, with the first freeze coming to most of the area on the morning of the 22nd. Locations not reaching freezing that morning did on the 23rd.

Temperatures warmed between the 23rd and 26th and moisture values increased significantly. A slow-moving upper air storm brought widespread and heavy rains between the 27th and 30th. Between four and eight inches of rain fell between the IH-20 Corridor and Red River, with under four inches south of IH-20. In addition, a shallow Arctic air mass was present, which held temperatures a few degrees below normal during this period.

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 2015



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