June 2005

Report and Summary

Tyler, Texas
June 2005
by Robert K. Peters, Ph.D.
National Weather Service Cooperating Observer

The month of June 2005 was warmer and drier than normal.

The area south of IH-20 was in moderate drought, while that north of IH-20 was in severe drought.

Rainfall in Tyler during the twelve months ending June 30 was barely 70 percent of normal, with rainfall since January 1 60.8 percent of normal.

Tyler received considerably more rain than did some stations. Longview measured but 0.16 inch during the month. Compared with June 2004, the month was 5.2 deg. warmer and 6.46 inches drier.

Rainfall through June 30 was 12.62 inches less in 2005 than in 2004.

The thirty-day outlook had called for near normal temperatures and below normal precipitation.

The week May 29-June 4 saw near normal temperatures and precipitation about 10 percent of normal.

Early in the week, a weak upper air storm and diffuse cold frontal boundary was responsible for shower activity. Cooler and drier air built in behind the front on the 1st and 2nd, with upper air high pressure returning the afternoon of the 2nd.

This caused warmer and dry weather for the end of the week.

The week's average temperature was 77.4 deg., and rainfall was 0.07 inch. This was 1.5 deg. cooler than the previous week. Compared with the same week in 2004, the week was 0.8 deg. cooler, and 2.13 inches drier.

The week June 5-11 saw temperatures about 4 deg. warmer than normal, and rainfall about two-thirds of normal.

Upper air high pressure controlled the region's weather for much of the week. This, combined with dry soils, brought the warm temperatures.

The sea-breeze front was active at mid-week, bring the city its only rainfall on the afternoon of the 7th.

The week's average temperature was 82.9 deg., and precipitation was 0.66 inch. This was 5.5 deg. warmer than the previous week.

Compared with the same week in 2004, the week was 3.9 deg. warmer, and 1.06 inch drier.

The week June 12-18 saw temperatures about 3 deg. warmer than normal, and near normal rainfall.

Upper air high pressure was situated to the southwest of the area during the week, bringing northwesterly winds aloft. This caused thunderstorm complexes to form most afternoons over the Western Plains, and drop southeastward during the overnight and morning hours. Somewhere in East Texas received rainfall almost daily, with amounts running from little in the west to two inches or more in the east.

Rain occurred in Tyler during the early-morning of the 14th.

There were occurrences of severe weather to the north and east of the region on several days during the week.

Outside of the shower areas, temperatures were again quite warm, until a strong late-season cold front crossed on the 18th.

The week's average temperature was 82.9 deg., and precipitation was 0.80 inch. The week's average temperature was identical with that of the previous week. Compared with the same week in 2004, the week was 3.3 deg. warmer, and 0.06 inch drier.

The week June 19-25 saw near normal temperatures and no measurable rainfall.

Early in the week, high pressure ridging in from the northeast brought low relative humidities, and comfortable nighttime temperatures. By late-week, upper air high pressure shifted over the area from the west and the dry air mass modified. This brought above normal temperatures. Dry soils and vegetation contributed to the near to above normal afternoon high readings throughout the entire week.

Weaknesses in the upper air high brought isolated showers on the afternoons of the 23rd, 24th, and 25th. A trace of rain fell in Tyler on the 23rd.

Haze was present in the area beginning on the 22nd, keeping visibilities generally below seven miles.

The week's average temperature was 81.7 deg. This was 1.2 deg. cooler than the previous week.

Compared with the same week in 2004, the week was 4.1 deg. warmer, and 0.42 inch of rain occurred last year.

The final five days of the month were hot and, for the most part, dry.

A few isolated showers occurred on the afternoons of the 26th and 30th.

Haze persisted through the 29th, until higher wind speeds dissipated it.

Upper air high pressure remained in control.

• 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 2005

• 01 86 67 83 tr
• 02 92 65 89
• 03 90 71 85
• 04 93 74 90
• 05 93 74 90
• 06 93 71 87
• 07 95 73 91 0.06 T, PCPN 0000-0100
• 08 95 70 93 0.60 T, PCPN 0100-0200
• 09 93 74 85 tr pcpn 2200-2300
• 10 94 72 91
• 11 93 73 91
• 12 94 72 90
• 13 91 73 88
• 14 94 69 93 0.80 T, PCPN 0700-1000
• 15 97 73 94
• 16 98 75 95
• 17 95 74 93
• 18 93 73 84 MX 1200-2400 85
• 19 92 67 89
• 20 91 67 89
• 21 92 67 90 H
• 22 95 68 92 H
• 23 96 72 88 tr. H
• 24 95 72 93 H
• 25 98 72 92 H
• 26 96 73 81 0.01 H, PCPN 2200-2300
• 27 97 71 94 H
• 28 98 74 95 H
• 29 100 74 96 H
• 30 100 76 98

JUNE 2005, RECORDS AND SUMMARY:

• 21ST, ASTRONOMICAL ONSET OF SUMMER 0646Z;
• HIGHEST TEMPERATURE 100 ON THE 29TH AND 30TH;
• LOWEST TEMPERATURE 65 ON THE 3RD;
• AVERAGE MAXIMUM 94.0 F.,
• AVERAGE MINIMUM 71.5 F.,
• AVERAGE TEMPERATURE 82.8 F.,
• 2.9 DEG. WARMER THAN NORMAL.
• HEATING DEGREE DAYS 0
• 0 PERCENT OF NORMAL HEATING DEGREE DAYS.
• COOLING DEGREE DAYS 537,
• 119.8 PERCENT OF NORMAL COOLING DEGREE-DAYS;
• TOTAL PRECIPITATION 1.47 IN.,
• 2.18 IN. LESS THAN NORMAL.
• 40.3 PERCENT OF NORMAL PRECIPITATION.
• YEAR-TO-DATE PRECIPITATION 13.89 IN.,
• 3 DAYS ON WHICH THUNDERSTORMS OCCURRED;
• 8 DAYS ON WHICH THE VISIBILITY WAS HEAVILY RESTRICTED BY FOG, nSMOKE, OR HAZE;
• 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.
• 5 DAYS ON WHICH MEASURABLE PRECIPITATION OCCURRED.
• 27 DAYS ON WHICH THE MAXIMUM TEMPERATURE REACHED OR EXCEEDED 90 DEG.;
• 2 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.
• 1782 SEASON-TO-DATE HEATING DEGREE DAYS,
• PERCENTAGE OF NORMAL SEASON-TO-DATE HEATING DEGREE DAYS: 91.0,
• 959 YEAR-TO-DATE COOLING DEGREE DAYS.
• PERCENTAGE OF NORMAL YEAR-TO-DATE COOLING DEGREE DAYS: 111.4;
• PRECIPITATION DURING THE PREVIOUS TWELVE MONTHS 31.99 IN.,
• TWELVE-MONTH PRECIPITATION PERCENTAGE 70.7.

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