The month of June 2007 goes into the record books as the fifth wettest June since weather records began in Tyler in 1896. It replaces June 1987 with a rainfall total of 8.57 inches, besting that month by 0.46 inch. Otherwise, the month was slightly cooler than normal. For much of the month, closed upper air low pressure centers wandered around North Texas, causing the rains. Flooding occurred in the region during two periods: the 15th-16th, and the 25th-28th. June 2007 was 1.2 deg. Cooler than June 2006, and 7.45 inches wetter. Year-to-date rainfall was nearly double in 2007 through the end of June compared with 2006. The difference was 17.34 inches. The precipitation percentage during the previous twelve months was also nearly double in 2007 where it stood in 2006: 123.1 in 2007 compared with 64.7 percent in 2006. The thirty-day outlook for June 2007 had called for near normal temperatures and near normal precipitation.
The week May 27-June 2 saw temperatures about 2 degrees below normal, and near normal rainfall. A series of upper air disturbances crossed the region during the week. These combined with weak frontal boundaries and a very moist air mass to bring rainfall on five days. The week's average temperature was 75.1 deg., and precipitation was 0.85 inch. This was 2.6 deg. Warmer than the previous week. Compared with the same week in 2006, the week was 4.5 deg. Cooler and 0.72 inch wetter.
The week June 3-9 saw temperatures about a degree above normal, and rainfall about 140 percent of normal. Upper air high pressure built into the area at mid-week, which brought very warm readings on the 7th, 8th, and 9th. In fact, the first 90-degree reading of the Summer was observed on the 7th 30 days later than the median of May 8th. Otherwise, weak sea-breeze front activity along with weaknesses in the upper air high permitted rainfall on five days. The week's average temperature was 79.4 deg., and rainfall was 1.13 inches. This was 4.2 deg. Warmer than the previous week. Compared with the same week in 2006, the week was 4.6 deg. Cooler and 1.12 inches wetter.
The week June 10-16 saw temperatures near normal, and rainfall about 200 percent of normal. Upper air high pressure continued dominating the region's weather until the 14th, when a slow-moving upper air low approached from the northwest. Temperatures were warm early in the week with scattered showers each afternoon from daytime heating and the moist air mass. A weak cold front entering from the northeast on the 13th brought an increase in shower activity. As the upper air low drew nearer, heavy rainfall occurred, with flooding on the morning of the 16th in Smith, Gregg, and Upshur Counties. Lake Tyler went above its spillway on the evening of the 14th. The week's average temperature was 80.4 deg., and rainfall was 1.71 inches. This was 1.0 deg. Warmer than the previous week. Compared with the same week in 2006, the week was 0.6 deg. Cooler, and 1.11 inches wetter.
The week June 17-23 saw temperatures about a degree below normal, and near normal rainfall. An upper air low pressure trough controlled the weather for all of the week except on the 18th and 19th when temperatures climbed into the 90s and rain was largely absent from East Texas. Rain returned on the 20th, and there was scattered shower activity daily from then into the end of the week. A few of the late-day thunderstorms on the 20th and 21st reached severe limits, and there were occurrences of flooding in counties to the northeast of Tyler. The week's average temperature was 79.9 deg., and rainfall was 0.68 inch. This was 0.5 deg. Cooler than the previous week. Compared with the same week in 2006, the week was 1.3 deg. Cooler, and 0.18 inch wetter.
The week June 24-30 saw about 3 degrees cooler than normal, and rainfall about 500 percent of normal. The week was mild and very wet. An upper air trough meandered around North Texas, bringing rain somewhere in the region daily. Flooding occurred in Tyler on the morning of the 25th, and over the western and northern counties that evening, and again on the 26th, 27th, and 28th. Compared with the previous week, the week was 0.9 deg. Cooler.
Compared with the same week in 2006, the week was 0.6 deg. Cooler. There was no rain during the week in 2006.
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.
MX MN OBS PCPN REMARKS
June 2007, RECORDS AND SUMMARY: