The month of November 2007 was slightly warmer and drier than normal. Much above normal temperatures were present three times during the month, followed by sharp cool-downs. The city had not observed its first freeze by month's end, with November 15 being the median date for that. Compared with November 2006, the month was 1.5 deg. Warmer, and 2.45 inches drier. The thirty-day outlook for November 2007 had called for above normal temperatures and near normal precipitation.
The week October 28-November 3 saw near normal temperatures and no rainfall. High pressure lingered during the first part of the week, resulting in cool nighttime and mild afternoon temperatures. Readings warmed on the 31st ahead of a cold front which crossed on the morning of the 1st, again lowering temperatures. With moisture from the Gulf of Mexico closed off, there was no rain. The week's average temperature was 62.3 deg., which was 3.5 deg. Warmer than the previous week. Compared with the same week in 2006, the week was 4.4 deg. warmer and 0.82 inch drier.
The week November 4-10 saw temperatures about 3 degrees above normal and no rainfall. A cold front on the 6th lowered temperatures during the mid-week period, with warmer air returning on the 9th. At the beginning and end of the week, Tropical Maritime air was in control. The week's average temperature was 63.3., which was 1.0 deg. Warmer than the previous week. Compared with the same week in 2006, the week was 1.3 deg. Cooler and 2.10 inches drier.
The week November 11-17 saw temperatures about 6 degrees above normal, and rainfall about 2 percent of normal. The week's only measurable rain came on the 12th with a crossing upper air disturbance. Otherwise, Tropical Maritime air with upper air high pressure kept temperatures very warm until the arrival of a strong cold front on the 14th. Several locations (not including Tyler) experienced a light freeze on the morning of the 16th. Tropical Maritime air returned on the 17th ahead of a wet storm system which crossed to the south of Tyler that night. Stations in the East Texas Lakes Country received more than three inches of rain, with only a trace in the city. The week's average temperature was 63.6 deg., which was 0.3 deg. Warmer than the previous week. Rainfall was 0.02 inch. Compared with the same week in 2006, the week was 8.8 deg. Warmer and 0.03 inch drier.
The week November 18-24 saw near normal temperatures, and rainfall about 150 percent of normal. The week began mild with Tropical Maritime air in place. On the 21st, an Arctic cold front crossed the region, lowering temperatures dramatically for the last half of the week. A strong storm system crossed at the weekend, with storm totals of 1.5 to 2.5 inches common in the Tyler area from the night of the 22nd through the afternoon of the 25th. The week's average temperature was 55.1 deg., which was 8.5 deg. Cooler than the previous week. Rainfall was 1.50 inches. Compared with the same week in 2006, the week was 0.7 deg. Warmer, and there was no rainfall in 2006.
The final six days of the month began cold, with strong warming on the 30th. Rain moved out of the region on the evening of the 25th, with the rest of the month dry. A reinforcing cold front moved into the area on the 28th, holding down temperatures.
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
November 2007, RECORDS AND SUMMARY: