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April 2014 - Report and Summary

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

The thirty-day outlook had called for near normal temperatures and near normal precipitation. It was left unchanged at the March 31 revision. The month of April 2014 saw normal temperatures and above normal precipitation. Most of the month's rain fell on one day.

April began warm under upper air high pressure and a Tropical Maritime air mass. A cold front on the 4th introduced cool air, which persisted until the morning of the 9th. A slow-moving and very wet storm system crossed on the 6th and 7th, with severe weather and flooding rains.

Warm air returned on the 10th, and persisted until the arrival of a strong cold front on the morning of the 14th. This brought rain and more severe weather, and unseasonal cold until warming set in on the 17th. A weak disturbance on that day brought widely scattered light showers to the area.

Warm weather persisted in the area until a powerful storm system crossed on the afternoon of the 27th, and much cooler air arrived on the 28th to finish out the month. There were a few severe thunderstorms in East Texas on the 27th and early on the 28th, but no rain fell in Tyler. This storm system produced numerous tornadoes and widespread flooding over the Eastern United States from the afternoon of the 27th through the 30th.

Compared with April 2013, April 2014 was 1.6 deg. Warmer. Rainfall in 2014 was 1.45 greater than in April 2013, while year-to-date rainfall was 1.45 inches less through April 30, 2014 compared with the same period in the prior year.

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.

APRIL 2014



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