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February 2015 - Report and Summary

by Robert K. Peters, Ph.D. - National Weather Service Cooperating Observer

The month of February 2015 was colder than normal with near normal precipitation. Compared with February 2014, the month was 2.3 deg. Colder, and 0.89 inch drier. Year-to-date precipitation through month's end was 5.83 in. Greater in 2015 than in 2014. The thirty-day outlook had called for below normal temperatures and above normal precipitation. No revision of the outlook was published on January 31.

The month began chilly with below normal temperatures through the 6th. Storm systems crossing on the 1st and 5th brought light rainfall amounts. A temperature inversion brought overcast and cold temperatures from the morning of the 4th through the evening of the 6th.

Upper air high pressure, shifting eastward over the region, sent temperatures above normal from the 7th through the 11th. A cold front lowered temperatures back to normal on the 12th and 13th. Compressional heating ahead of an Arctic cold front warmed readings on the afternoon of the 14th before a sharp cool-down commencing on the morning of the 16th.

The cool temperatures continued through the 19th, followed by a brief warm-up through the 21st. Light rain fell on the 16th, and some light wintry precipitation was scattered on the morning of the 17th with no accumulation. Arctic air returned on the afternoon of the 21st, and persisted through the end of the month. Temperatures ran up to 22 degrees below normal, with record daily low maximum temperatures on the 24th and 27th.

Sleet fell on the 23rd with 0.4 inch accumulation. A mixture of snow, sleet, and freezing rain occurred on the 25th with 1.2 inch of snowfall. Light snow fell at some locations north of IH-20 on the 27th with between one and two inches reported. Only a trace of snow fell in Tyler on the afternoon of the 27th occurring as snow grains. Light sleet occurred on the morning of the 28th. The Arctic air mass was reinforced on the 26th, with Tropical Maritime air commencing a slow return on the morning of the 28th.

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.

February 2015



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