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February 2013 - Report and Summary

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

The month of February 2013 was slightly warmer and slightly drier than normal. Compared with February 2012, the month was 1.9 deg. Cooler, and 0.28 inch drier. Year-to-date rainfall through months' end was 0.15 inch greater in 2013 than in 2012. The thirty-day outlook had called for above normal temperatures and near normal precipitation.

On each of the month's first ten days, temperatures ran above normal, with readings at their warmest between the 5th and 7th. A series of weak cold fronts nosed into the region, having little effect on temperatures. Upper air disturbances crossed between the 4th and 7th with rainfall.

The weather pattern changed after the 7th, with storm systems crossing at 72 to 96-hour intervals. These were characterized by showers with some of the stronger system generating thunderstorms. A brief cool-down followed, with a warm-up ahead of the next system. Rain was widespread on the 10th and 12th, with isolated reports of severe weather early on the 10th. Systems crossed on the 15th, 18th, and 21st.

There were about seven small tornadoes accompanying the severe weather in the eastern counties on the 18th. One fatality occurred in Sabine County in a tornado on the 21st.

Upper air high pressure elongated north-to-south over the Western United States beginning on the 22nd. A major blizzard crossed the Plains on the 25th. The resulting northwest flow aloft brought cold fronts into the area, keeping temperatures below normal through the end of the month.

Strong south winds blew ahead of the system of the 25th on the 24th and 25th, with strong northwest winds blowing from the afternoon of the 25th through mid-day on the 26th.

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 2013



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