November 2004

Report and Summary

Tyler, Texas
November 2004
by Robert K. Peters, Ph.D.
National Weather Service Cooperating Observer

The month of November 2004 saw near normal temperatures and above normal precipitation.

A series of upper air troughs crossed during the month, and were responsible for the rainfall. Amounts across East Texas were highly variable, with rainfall generally concentrating over the south.

Compared with November 2003, the month was 1.2 deg. cooler, and 3.96 inches wetter.

Year-to-date rainfall through November 30 was 2.83 inches greater this year than last.

The thirty-day outlook for November 2004 had called for near normal temperatures and near normal precipitation. The week October 31-November 6 saw near normal temperatures and near normal precipitation.

The Sub-Tropical upper air high, which had brought very warm weather to the last two weeks in October, abruptly receded on the 1st. An upper air low crossed, followed by a cold front. This brought the week's rain, and a cool and dry air mass for the end of the week.

The week's average temperature was 61.9 deg., and rainfall was 0.98 inch. The temperature was 14.4 deg. lower than the previous week.

Compared with the same week in 2003, the week was 0.4 deg. warmer, and 0.86 inch wetter.

The week November 7-13 saw near normal temperatures and below normal rainfall.

Cold fronts crossed on the 8th and 11th. The first front brought a dry air mass, which persisted until moisture returned on the 10th.

The front of the 11th was followed by a shallow layer of cool air, which was trapped beneath a temperature inversion. Skies were cloudy and temperatures cool through the end of the week.

Skies were overcast in Tyler for 122 consecutive hours, between 10 a.m. on the 11th and 12:00 noon on the 16th. The upper air storm, which crossed on the 10th-11th, brought little rainfall.

The week's average temperature was 58.3 deg., and precipitation was 0.01 inch. This was 3.6 deg. cooler than the previous week.

Compared with the same week in 2003, the week was 4.0 deg. cooler and 0.04 inch drier.

The week November 14-20 saw temperatures about 4 deg. warmer than normal, and rainfall about 180 percent of normal.

The chilly air mass of late in the previous week slowly modified. Another weak cold front crossed on the morning of the 18th, following a powerful upper air storm which had crossed the previous day.

This storm brought heavy rains to the southern counties, with amounts ranging from about an inch over the north to nearly five inches in the south.

A second upper air storm was approaching late in the week, bringing more heavy rains to the south on the 20th.

The late-week cold front brought little cooling, but did serve as a focus for heavy rains over the south on the 19th-20th. The week's average temperature was 61.3 deg., and precipitation was 1.80 inches. The week was 3.0 deg. warmer than the previous week.

Compared with the same week in 2003, the week was 1.5 deg. cooler, and 0.58 inch wetter.

The week November 21-27 saw temperatures about 2 deg. warmer than normal, and rainfall about 175 percent of normal. A slow-moving upper air storm crossed between the 20th and 23rd, bringing general and heavy rainfall.

Amounts increased from north to south, with some of the southern counties receiving nearly ten inches of rain.

A widespread severe weather outbreak occurred on the 23rd.

Cold fronts crossed on the 24th and 27th. The front of the 24th brought the season's first freeze on the morning of the 25th, and an end to the 273-day growing season. This was 28 days longer than normal, with the last freeze of the 2003-2004 cool season occurring February 26.

The week's average temperature was 57.3 deg., and rainfall was 1.85 inches. The week was 4.0 deg. cooler than the previous week. Compared with the same week in 2003, the week was 7.4 deg. warmer, and 1.62 inches wetter.

The last three days of the month were wet as another upper air storm crossed. Enhancing precipitation was a strong cold front on the afternoon of the 29th, which introduced mixed Polar Maritime and Polar Continental air into the area.

Gusty winds blew on both the 29th and 30th--southerly on the 29th and northwesterly on the 30th..

• 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

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.

NOVEMBER 2004

• 01 74 64 66 0.28 PCPN 1100-1700 MIN 0000-1200 65, MAX 1200-2400 68
• 02 70 60 60 0.49 PCPN 1300-1400, 2200-2300 MIN 0000-1200 62
• 03 61 52 55 0.21 PCPN 0000-0600 MIN 0000-1200 53, MAX 1200-2400 57
• 04 65 42 54
• 05 71 41 58
• 06 79 43 63
• 07 82 50 65
• 08 75 50 64
• 09 71 48 58
• 10 77 49 71
• 11 71 51 51 0.01 PCPN 0800-0900; MIN 0000-1200 56, MAX 1200-2400 59
• 12 53 46 51
• 13 55 50 53
• 14 58 48 56 0.02 PCPN 0000-0200
• 15 67 55 65
• 16 75 62 69 MIN 0000-1200 63
• 17 69 59 59 A, PCPN 1100-1200, 1400-2400 MIN 0000-1200 62, MAX 1200-2400 64
• 18 1.78 PCPN 0000-0400 MIN 0000-1200 58
• 19 69 53 62
• 20 71 57 62 PCPN 2300-2400
• 21 68 61 65 1.27 T, PCPN 0000-1200
• 22 65 61 63 0.10 T, PCPN 0100-0200, 1100-2000 MIN 0000-1200 62, MAX 1200-2400 63
• 23 70 62 66 0.35 PCPN 0200-0300, 1600-1700
• 24 66 45 48 0.17 T, PCPN 0200-0300 MIN 0000-1200 52, MAX 1200-2400 53
• 25 61 32 52
• 26 68 44 66
• 27 68 51 51 MIN 0000-1200 56, MAX 1200-2400 63
• 28 61 37 56
• 29 66 56 59 T, PCPN 1900-2300
• 30 59 40 40 0.91 T, PCPN 0800-1800 MIN 0000-1200 44, MAX 1200-2400 46

NOVEMBER 2004, RECORDS AND SUMMARY:

• 25TH, GROWING SEASON ENDS AT 273 DAYS, BEGAN 2/26/04; TEMPERATURE
• REACHED 32. DEG FOR ABOUT ONE HOUR SHORTLY AFTER 6 A.M.
• HIGHEST TEMPERATURE 82 ON THE 7TH;
• LOWEST TEMPERATURE 32 ON THE 25TH;
• AVERAGE MAXIMUM 65.6 DEG.,
• AVERAGE MINIMUM 50.9 DEG.,
• AVERAGE TEMPERATURE 58.3 DEG.;
• 0.8 DEG. WARMER THAN NORMAL.
• HEATING DEGREE DAYS 210,
• 83.3 PERCENT OF NORMAL HEATING DEGREE DAYS.
• COOLING DEGREE DAYS 7,
• 28 PERCENT OF NORMAL COOLING DEGREE-DAYS;
• TOTAL PRECIPITATION 5.59 IN.,
• 1.14 IN. MORE THAN NORMAL.
• 125.6 PERCENT OF NORMAL PRECIPITATION.
• YEAR-TO-DATE PRECIPITATION 42.83 IN.,
• 5 DAYS ON WHICH THUNDERSTORMS OCCURRED;
• 0 DAYS ON WHICH THE VISIBILITY WAS HEAVILY RESTRICTED BY FOG, SMOKE, 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.
• 11 DAYS ON WHICH MEASURABLE PRECIPITATION OCCURRED.
• 0 DAYS ON WHICH THE MAXIMUM TEMPERATURE REACHED OR EXCEEDED 90 DEG.;
• 0 DAYS ON WHICH THE MAXIMUM TEMPERATURE REACHED OR EXCEEDED 100 DEG.;
• 0 DAYS ON WHICH THE TEMPERATURE FAILED TO RISE ABOVE 32 DEG.
• 1 DAYS ON WHICH THE MINIMUM TEMPERATURE REACHED OR FELL BELOW 32 DEG.
• 215 SEASON-TO-DATE HEATING DEGREE DAYS,
• PERCENTAGE OF NORMAL SEASON-TO-DATE HEATING DEGREE DAYS: 71.9;
• 2420 YEAR-TO-DATE COOLING DEGREE DAYS.
• PERCENTAGE OF NORMAL YEAR-TO-DATE COOLING DEGREE DAYS:96.3;
• PRECIPITATION DURING THE PREVIOUS TWELVE MONTHS 45.94 IN.,
• TWELVE-MONTH PRECIPITATION PERCENTAGE 101.4.

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