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August 2013 - Report and Summary

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

The month of August 2013 was warmer and drier than normal.

Compared with August 2012, the month was 1.0 deg. Warmer, and 1.86 inches drier. Year-to-date rainfall through month's end was 3.11 inches greater in 2012 than in 2013.

The thirty-day outlook had called for near normal temperatures and above normal precipitation. It was not changed when the revision was issued on July 31 and it was wrong.

Continuing a pattern which began in late-July, August started hot. Upper air high pressure was overhead through the 12th. This resulted in well above normal temperatures, with heat advisories necessary between the 6th and 8th.

A tropical low brought showers on the afternoons of the 10th and 11th.

On the 12th, things changed. An unusually strong cold front for mid-August entered the region. This brought widespread showers and thunderstorms on the 12th and 13th, followed by lower temperatures.

Below normal temperatures were in the region between the 14th and the morning of the 19th, with fair skies, light north winds, and comfortably low relative humidities.

As upper air high pressure re-asserted itself from the west on the afternoon of the 18th, temperatures returned to normal levels.

Temperatures were slightly above normal through the 25th. A decaying tropical wave, which moved through South and West Texas, lowered temperatures slightly on the 26th and 27th before upper air high pressure re-asserted itself. This low made a circle around the upper air ridge, and moved southward through the region on the 31st.

Temperatures went back above normal on the 28th, and stayed there through the end of the month. There was no rain, despite the return of the tropical low.

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.

AUGUST 2013

MX MN OBS PCPN REMARKS

AUGUST 2013, RECORDS AND SUMMARY:

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