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June 2011 - Report and Summary

June 2011 was much warmer and drier than normal. In fact, it was the fifth warmest June on record, replacing June 1900 for that dubious honor. Compared with June 2010, the month was 2.0 deg. Warmer, and 10.52 inches drier. Year-to-date rainfall was 10.01 inches less in 2011 than in 2010-reflecting the drought which commenced in July 2010. The thirty-day outlook had called for above normal temperatures and below normal precipitation.

June began and remained under strong upper air high pressure. A weak disturbance in the Easterlies on the 5th permitted sea-breeze front showers on the evening of the 5th. Otherwise, the waxing and waning of the upper air ridge kept temperatures well above normal, with alternate slight increases and decreases in temperature owing to the precise position of the ridge. Temperatures peaked between the 2nd and 5th, and again between the 12th and 20th. A storm system crossed on the 21st, with widespread rain and thunderstorms. This lowered temperatures slightly through the 24th because of moist soils and weakened upper air high pressure. The upper air high returned on the 25th, persisting through month's end. This sent temperatures back well above normal.

On the evening of the 28th, thunderstorms developed along a cold front which had gone stationary north of Red River. These brought severe weather to the northern half of the region.

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.

June 2011



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