August 2011 Review - Waco

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August 2011 Review - Waco

August 2011 was the warmest month on record at Waco, besting the record set last month, July 2011.

Waco - August Temperatures

Rank	Temperature	Year
Highest Maximum
1	105.2	2011
2	101.7	1951
3 (tie)	101.4	2010
	101.4	1999
	101.4	1988
6	101.1	2006
7	100.7	1952
8	100.6	1910
9	100.5	1985
10	100.2	2000

Rank	Temperature	Year
Highest Average
1	92.9	2011
2	89.9	1951
3 (tie)	89.3	1924
3 (tie)	89.3	1910
5	89.2	2010
6	88.9	1934
7 (tie)	88.8	2006
	88.8	1999
	88.8	1952
10 (tie)	88.2	1988
	88.2	1982
	88.2	1918

Rank	Temperature	Year
Highest Minimum
1	80.5	2011
2	79.7	1924
3	79.4	1934
4	78.1	1923
5 (tie)	78.0	1951
	78.0	1918
	78.0	1910
8	77.3	1925
9 (tie)	77.2	1932
	77.2	1930
	77.2	1922

This was the warmest summer on record for Waco. The average minimum temperature was the warmest since the official observing site was moved from the city to the airport in 1940.

Waco - Summer Temperatures

Rank	Temperature	Year
Highest Maximum
1	102.7	2011
2	99.5	1980
3	99.4	1998
4 (tie)	98.7	2009
4 (tie)	98.7	1934
6	98.6	1925
7 (tie)	98.5	1990
	98.5	1969
	98.5	1918
10	98.4	1977

Rank	Temperature	Year
Highest Average
1	90.5	2011
2	88.7	1925
3	88.6	1934
4	87.7	1918
5	87.6	1998
6	87.3	1980
7 (tie)	87.2	1977
7 (tie)	87.2	1969
9 (tie)	87.0	2010
	87.0	2009
	87.0	1909

Rank	Temperature	Year
Highest Minimum
1	78.8	1925
2	78.4	1934
3	78.3	2011
4 (tie)	77.0	1924
4 (tie)	77.0	1923
6	76.9	1918
7	76.8	1914
8	76.6	2010
9	76.3	1932
10	76.1	1922

The 100° day total shattered the record from 1980. The streak of 44 days just topped 1980.

Waco - Greatest Annual and Consecutive 100° Days

Rank	# of Days	Year
Greatest Annual
1	79	2011*
2	63	1980
3	61	1998
4	58	1969
5	55	2009
6 (tie)	52	1990
6 (tie)	52	1977
8	50	1925
9 (tie)	46	2006
9 (tie)	46	1978

* through August 31

Rank	# of Days	Dates
Greatest Consecutive
1	44	Jun 30 - Aug 12, 2011
2	42	Jun 23 - Aug 3, 1980
3	30	Jun 27 - Jul 26, 1969
4	29	Jul 6 - Aug 3, 1998
5	26	Jul 29 - Aug 23, 1987
6	25	Jul 31 - Aug 24, 2010
7	24	Jul 22 - Aug 14, 1910
8	23	Aug 3-25, 1952
9 (tie)	20	Aug 8-27, 2006
9 (tie)	20	Jul 2-21, 1978

Between June 30 and August 31, there was only one day during which the temperature failed to reach 100°.

Waco - Greatest 100° Days by Month

Rank	# of Days	Year
June
1 (tie)	17	2011
1 (tie)	17	1998
3	15	1925
4 (tie)	14	2009
4 (tie)	14	1902
6 (tie)	13	1990
	13	1918
	13	1911
9	10	1980
10 (tie)	9	1969
10 (tie)	9	1905

Rank	# of Days	Year
July
1 (tie)	31	2011
1 (tie)	31	1980
3	29	1969
4	28	1998
5	24	1978
6 (tie)	23	1925
6 (tie)	23	1909
8	21	1954
9	20	2001
10 (tie)	19	2009
	19	1977
	19	1912

Rank	# of Days	Year
August
1	30	2011
2 (tie)	27	2010
2 (tie)	27	2006
4	26	1951
5 (tie)	25	1999
	25	1988
	25	1987
8	24	1952
9 (tie)	22	1985
	22	1982
	22	1910

There were 24 days with record highs during the summer of 2011, 14 of which occurred in August. Excluding 2011, the summer with the most current record highs is 1969 with 9 days.

Waco - Annual and Consecutive Days of 105° or More

Rank	# of Days	Year
Greatest Annual
1	29	2011*
2	12	1998
3	11	1969
4	10	1980
5	9	1951

* through August 31

Rank	# of Days	Dates
Greatest Consecutive
1 (tie)	6	Aug 15-20, 2011
	6	Aug 1-6, 2011
	6	Aug 31 - Sep 5, 2000
	6	Aug 9-14, 1969
3 (tie)	5	Aug 26-30, 2011
	5	Jul 30 - Aug 3, 1998
	5	Jul 28 - Aug 1, 1986

The number of days with lows of 80° or more was the most at Waco since the observing site moved from the city to the airport in 1940.

Waco - Annual and Consecutive Days with Lows of 80° or More

Rank	# of Days	Year
Greatest Annual
1	50	1925
2	43	1934
3	40	2011*
4	38	1924
5	27	1918

* through August 31

Rank	# of Days	Dates
Greatest Consecutive
1 (tie)	15	Aug 12-26, 1934
1 (tie)	15	Jul 16-30, 1925
3	14	Jul 28 - Aug 10, 1924
4 (tie)	10	Jun 28 - Jul 7, 1933
	10	Aug 15-24, 1924
	10	Jul 12-21, 1924

August 2 set two all-time records, the highest minimum temperature (86°) and the highest mean temperature (97.5°). There were 7 days with low temperatures of 83° of higher. There had been no such days since 1967.

Waco - Daily Temperatures

Rank	Temperature	Date
Highest Maximum
1	112	Aug 11, 1969
2 (tie)	111	Sep 4, 2000
2 (tie)	111	Aug 11, 1936
4 (tie)	110	Aug 27, 2011
4 (tie)	110	Aug 13, 1969
6 (tie)	109	Aug 28, 2011
	109	Aug 2, 2011
	109	July 12, 1998
	109	Aug 31, 1990
	109	Jun 27, 1980
	109	Aug 12, 1969
	109	Aug 10, 1969
	109	Aug 18, 1909

Rank	Temperature	Date
Highest Average
1	97.5	Aug 2, 2011
2	96.5	Aug 11, 1969
3	96.0	Aug 13, 1969
4 (tie)	95.5	Aug 3, 2011
	95.5	Jul 12, 1933
	95.5	Jul 18, 1925
7 (tie)	95.0	Aug 29, 2011
	95.0	Aug 20, 2011
	95.0	Aug 4, 2011
	95.0	Aug 10, 1969

Rank	Temperature	Date
Highest Minimum
1	86	Aug 2, 2011
2	85	Jul 18, 1925
3 (tie)	84	Aug 29, 2011
	84	Jul 12, 1933
	84	Aug 20, 1930
	84	Jul 28, 1925
5 (tie)	83	Aug 30, 2011
	83	Aug 23, 2011
	83	Aug 20, 2011
	83	Aug 3, 2011
	83	Jul 26, 2011
	83	Jul 31, 1967
	83	Jul 31, 1966
	83	Jul 22, 1966
	83	Aug 6, 1951

Precipitation deficits continue to mount across Waco after the 5th driest summer on record. There were only two days during July and August with measurable rainfall at Waco Regional Airport.

Waco - Precipitation

Rank	Precipitation	Year
August - Driest
1	0.00	1902
2 (tie)	T	1999
	T	1952
	T	1929
	T	1924
	T	1910
7	0.01	2009
8	0.03	1936
9	0.05	2000
10	0.06	2006
11	0.08	2011

Summer - Driest

Rank Precipitation Year

1 0.51 1980

2 0.85 1956

3 0.93 1924

4 1.33 1954

5 1.43 2011

6 1.58 1965

7
(tie) 1.87 1952

1.87 1918

9 1.96 1998

10 2.02 1917

Location	August		Summer (June-August)			October 2010 - August 2011
ASOS Precipitation
Location	Precipitation	Departure from Normal	Precipitation	Departure from Normal	Percent of Normal	Precipitation	Departure from Normal	Percent of Normal
Waco	0.08	-1.97	1.43	-5.84	20	13.92	-17.71	44
DFW Airport	0.96	-0.95	3.89	-3.97	49	21.60	-11.99	64
Dallas Love Field	0.93	-0.94	4.63	-3.56	57	22.86	-11.87	66
Fort Worth Meacham	0.92	-0.92	3.61	-5.78	38	16.86	-17.01	50
Dallas Executive	0.50	-3.07	2.67	-7.54	26	18.20	-19.49	48
Fort Worth Alliance	1.36	-1.15	3.36	-5.96	36	17.63	-16.85	51
Arlington	0.38	-1.59	1.30	-7.24	15	18.17	-16.37	53
Denton	1.75	-0.02	4.30	-4.35	50	20.81	-14.72	59
McKinney	0.32	-1.63	1.72	-6.47	21	20.00	-16.92	54
Terrell	0.25	-1.87	4.02	-4.90	45	25.57	-12.53	67
Corsicana	0.05	-2.06	4.53	-3.87	54	21.58	-15.96	57
Mineral Wells	2.00	-0.24	2.49	-5.90	30	11.20	-18.03	38

Back-to-Back Pacific Storms to Impact the West Coast; Heavy Snow in the Central Appalachians

August 2011 Review - Waco

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