June 2011

Report and Summary

Tyler, Texas
June 2011
by Robert K. Peters, Ph.D.
National Weather Service Cooperating Observer

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.

• KEY TO SYMBOLS:
• A = HAIL
• B = BLOWING
• D = DUST
• F = FOG
• H = HAZE
• IP = SLEET
• K = SMOKE
• L = DRIZZLE
• R = RAIN
• S = SNOW
• T = THUNDERSTORM
• Z = GREENWICH MEAN TIME
• ZL = FREEZING DRIZZLE
• ZR = FREEZING RAIN
• - = LIGHT
• + = HEAVY

R FOLLOWING A TEMPERATURE OR PRECIPITATION VALUE RECORD

The reporting period for temperatures, precipitation, 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. 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

• DY MX MN OBS PCPN REMARKS
• 01 96 70 93
• 02 98 70 94
• 03 98 75 93
• 04 98 69 96
• 05 100R 70 72 0.04 T, PCPN 2300-2400 Morning Low 74
• 06 97 67 91 0.09 T, PCPN 0000-0200
• 07 98 69 93
• 08 95 72 93 F
• 09 95 71 92 H
• 10 96 71 93
• 11 98 73 95
• 12 99 72 96
• 13 100 72 97
• 14 99 74 96
• 15 99 76 96
• 16 100 77 98
• 17 100 77 99
• 18 102 77 100
• 19 102 78 98
• 20 100 76 96
• 21 93 69 76 0.48 T, F, PCPN 1400-1500, 2100-2200, 2300-2400, MORNING LOW 71
• 22 84 67 83 0.42 T, F, PCPN 0500-1200
• 23 94 68 91 F
• 24 95 73 92
• 25 97 74 94
• 26 98 74 95
• 27 99 76 95
• 28 99 75 94 T
• 29 99 73 95
• 30 99 76 97 T

JUNE 2011, RECORDS AND SUMMARY:
• FIFTH WARMEST JUNE ON RECORD–85.2, REPLACES JUNE 1900 WITH 84.8;
• 5TH, RECORD HIGH MAXIMUM 100, REPLACES 99 FROM 1925;
• 21ST, SUMMER SOLSTICE 1716Z;
• HIGHEST TEMPERATURE 102 ON THE 18TH AND 19TH,
• LOWEST TEMPERATURE 67 ON THE 6TH AND 22ND,
• AVERAGE MAXIMUM 97.6 F.,
• AVERAGE MINIMUM 72.7 F.,
• AVERAGE TEMPERATURE 85.2 F.,
• 5.3 DEG. WARMER THAN NORMAL.
• 0 HEATING DEGREE DAYS,
• 0 PERCENT OF NORMAL HEATING DEGREE DAYS.
• 612 COOLING DEGREE DAYS,
• 139.7 PERCENT OF NORMAL COOLING DEGREE-DAYS;
• TOTAL PRECIPITATION 1.03 IN.,
• 2.62 IN. LESS THAN MONTHLY NORMAL.
• 28.2 PERCENT OF NORMAL MONTHLY PRECIPITATION.
• YEAR-TO-DATE PRECIPITATION 14.58 IN.,
• 8.26 IN. LESS THAN NORMAL YEAR-TO-DATE PRECIPITATION,
• 63.8 PERCENT OF NORMAL YEAR-TO-DATE PRECIPITATION;
• 4 DAYS ON WHICH THUNDERSTORMS OCCURRED;
• 4 DAYS ON WHICH MEASURABLE PRECIPITATION OCCURRED;
• 5 DAYS ON WHICH THE VISIBILITY WAS RESTRICTED TO BETWEEN 1/2 AND 6 MILES BY FOG, SMOKE, OR HAZE;
• 0 DAYS ON WHICH THE VISIBILITY WAS RESTRICTED TO 1/4 MILE OR LESS BY FOG;
• 0 DAYS ON WHICH THE VISIBILITY WAS RESTRICTED BY DUST OR BLOWING DUST;
• 0 DAYS ON WHICH FROZEN PRECIPITATION WAS OBSERVED;
• 0 IN. TOTAL SNOWFALL.
• 29 DAYS ON WHICH THE MAXIMUM TEMPERATURE REACHED OR EXCEEDED 90 DEG.;
• 7 DAYS ON WHICH THE MAXIMUM TEMPERATURE REACHED OR EXCEEDED 100 DEG.;
• 0 DAYS ON WHICH THE TEMPERATURE FAILED TO RISE ABOVE 32 DEG.
• 0 DAYS ON WHICH THE MINIMUM TEMPERATURE REACHED OR FELL BELOW 32 DEG.
• 2191 SEASON-TO-DATE HEATING DEGREE DAYS,
• PERCENTAGE OF NORMAL SEASON-TO-DATE HEATING DEGREE DAYS: 111.9,
• 1053 YEAR-TO-DATE COOLING DEGREE DAYS.
• PERCENTAGE OF NORMAL YEAR-TO-DATE COOLING DEGREE DAYS: 122.3,
• PRECIPITATION DURING THE PREVIOUS TWELVE MONTHS 25.89 IN.,
• TWELVE-MONTH PRECIPITATION PERCENTAGE 57.2.

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