Appendix II
ENVIRONMENTAL DATA

Mean monthly discharge, Buha River, 1970–90

Mean monthly discharge, Shaliu River, 1970–90

Average air temperatures, 1970–90

Average water temperatures, 1970–90

Wind speed

Wind direction

BUHA RIVER DISCHARGE 1970–90. (CUMECS)

	J	F	M	A	M	J	J	A	S	0	N	D	Mean	SE	Min	Max	TOTAL million cumecs
1970	2.29	2.15	2.28	2.57	8.29	35.00	51.80	113.00	23.80	8.33	3.73	2.25	21.29	9.12	2.15	113.00	668
1971	2.33	2.20	2.13	2.23	2.32	2.20	29.70	67.50	200.00	53.10	10.80	3.62	31.51	15.92	2.13	200.00	988
1972	2.83	2.63	2.88	5.37	31.50	53.90	141.00	141.00	55.60	21.00	7.85	3.15	39.06	14.19	2.63	141.00	1225
1973	2.34	2.38	2.42	2.39	2.41	7.38	18.20	18.10	7.46	6.72	3.17	2.13	6.26	1.64	2.13	18.20	196
1974	1.94	1.93	2.09	2.27	2.28	29.30	68.80	127.00	65.40	20.50	6.94	2.85	27.61	10.98	1.93	127.00	866
1976	2.19	2.09	2.19	2.28	2.09	59.10	104.00	77.70	48.70	38.20	9.58	2.62	29.23	9.88	2.09	104.00	917
1976	2.15	2.06	2.01	2.79	11.20	41.90	54.40	57.10	40.90	16.00	4.29	2.64	19.79	6.11	2.01	57.10	621
1977	2.41	2.30	2.30	2.54	2.44	35.50	50.80	130.00	73.90	26.50	6.13	2.52	28.11	11.02	2.30	130.00	882
1978	2.11	2.02	2.01	6.39	6.42	9.57	40.10	17.40	33.10	7.52	3.45	2.69	11.07	3.53	2.01	40.10	347
1979	2.08	1.89	1.87	2.18	1.84	1.67	144.00	41.70	15.20	5.05	2.78	1.85	18.51	11.38	1.67	144.00	581
1980	1.60	1.66	1.79	1.87	1.70	11.30	55.20	19.30	13.20	4.30	3.27	2.30	9.79	4.27	1.60	55.20	307
1981	1.93	1.81	1.92	1.99	1.84	4.08	42.50	106.00	143.00	27.70	6.07	2.55	28.45	13.08	1.81	143.00	892
1982	2.16	2.10	2.10	2.34	9.02	38.20	93.50	41.50	75.40	27.00	7.04	2.55	25.24	8.68	2.10	93.50	792
1983	1.91	1.96	1.94	1.96	12.80	78.70	186.00	87.10	23.00	14.20	5.13	2.56	34.77	15.55	1.91	186.00	1091
1984	1.86	1.90	1.89	4.18	2.44	32.60	102.00	26.50	11.40	6.44	3.45	2.17	16.40	7.98	1.86	102.00	514
1985	1.71	1.59	1.69	1.92	1.95	45.10	69.70	22.60	37.00	10.80	3.82	2.27	16.68	6.23	1.59	69.70	523
1986	1.83	1.88	1.90	1.72	4.80	59.40	99.70	74.40	31.90	9.47	3.17	2.14	24.36	9.52	1.72	99.70	764
1987	1.79	1.87	8.07	8.08	16.80	83.60	79.80	63.90	23.30	11.30	4.34	2.65	25.46	8.65	1.79	83.60	798
1988	2.27	2.06	2.05	2.09	2.36	21.70	31.30	90.40	58.90	35.80	7.79	3.26	21.67	7.83	2.05	90.40	679
1989	2.18	2.04	1.99	2.71	67.40	114.00	284.00	103.00	99.20	40.60	13.80	3.75	61.22	22.90	1.99	284.00	1920
1990	2.79	2.61	3.42	5.11	17.10	13.80	49.40	48.60	18.00	9.94	4.35	2.87	14.83	4.68	2.61	49.40	465
Mean	2.13	2.05	2.43	3.09	9.95	37.05	85.52	70.18	52.30	19.07	5.76	2.64					763.62
SE	0.07	0.06	0.29	0.37	3.22	6.37	13.25	8.43	10.09	2.93	0.62	0.10					371.30
Min	1.60	1.59	1.69	1.72	1.70	1.67	18.20	17.40	7.46	4.30	2.78	1.85					196.28
Max	2.83	.2.63	8.07	8.08	67.40	114.00	284.00	141.00	200.00	53.10	13.80	3.75					1920.13

SHALIU RIVER DISCHARGE 1970–90 (CUMECS)

	J	F	M	A	M	J	J	A	S	O	N	D	Mean	SE	Min	Max	TOTAL million cumecs
1970	0.21	0.01	0.07	2.42	8.37	14.30	13.70	23.20	9.26	4.43	2.36	0.42	6.56	2.04	0.01	23.20	206
1971	0.06	0.02	0.62	3.68	4.22	3.20	11.40	23.10	37.50	14.20	4.42	1.60	8.67	3.16	0.02	37.50	272
1972	0.68	0.44	1.63	5.88	17.90	13.90	44.40	23.10	13.50	622	2.96	0.99	10.97	3.58	0.44	44.40	344
1973	0.28	0.30	0.90	3.63	4.64	7.43	5.97	7.11	7.24	8.02	1.43	0.32	3.94	0.87	0.28	8.02	124
1974	0.00	0.00	0.32	3.48	6.20	10.90	27.20	21.50	21.20	8.25	3.68	0.85	8.63	2.65	0.00	27.20	271
1975	0.21	0.22	1.15	3.13	5.55	23.70	30.90	17.90	26.30	15.10	5.05	1.78	10.92	3.12	0.21	30.90	342
1976	0.53	0.38	0.86	4.14	5.51	11.80	18.60	28.60	14.00	6.89	3.39	0.66	7.95	2.43	0.38	28.60	249
1977	0.12	0.03	0.34	3.58	4.55	6.21	5.31	9.67	13.50	4.53	1.17	0.28	4.11	1.17	0.03	13.50	129
1978	0.05	0.02	0.30	3.57	2.90	5.03	13.90	8.64	12.40	4.40	1.35	0.45	4.42	1.33	0.02	13.90	139
1979	0.08	0.03	0.12	2.34'	1.36	0.72	7.49	12.50	8.70	4.36	1.69	0.43	3.32	1.14	0.03	12.50	104
1980.	0.04	0.02	0.58	2.11	1.58	9.10	15.60	8.02	5.19	2.84	1.42	0.44	3.91	1.32	0.02	15.60	123
1981	0.09	0.04	0.57	1.59	1.39	4.23	28.00	24.20	35.40	8.70	3.34	0.92	9.04	3.49	0.04	35.40	283
1982	0.34	0.40	0.71	2.31	3.54	7.82	25.20	9.88	19.30	9.15	3.00	0.83	6.87	2.22	0.34	25.20	216
1983	0.16	0.06	0.28	1.62	9.17	15.60	42.10	29.60	13.70	8.97	3.27	0.88	10.45	3.68	0.06	42.10	328
1984	0.21	0.12	0.82	3.01	8.97	19.10	29.30	7.20	5.57	3.56	2.07	0.7?	6.73	2.46	0.12	29.30	211
1985	0.10	0.04	0.49	2.10	5.01	18.50	19.60	15.60	23.90	8.35	2.89	0.93	8.13	2.44	0.04	23.90	255
1986	0.46	0.18	0.99	2.61	5.48	23.50	27.10	17.30	8.43	3.99	1.93	0.84	7.73	2.63	0.18	27.10	243
1987	0.15	0.13	0.81	2.04	5.04	17.30	25.60	22.60	10.30	4.43	1.84	1.10	7.61	2.54	0.13	25.60	239
1988	0.75	0.47	0.93	4.06	5.81	15.00	24.60	38.20	23.00	18.60	6.00	3.39	11.73	3.35	0.47	38.20	368
1989	1.93	0.69	1.60	5.08	13.20	20.50	58.00	33.70	25.90	12.20	5.17	2.00	15.00	4.77	0.69	58.00	470
1990	0.96	1.02	2.19	2.73	8.00	10.10	19.80	9.42	6.57	3.87	2.48	0.56	5.64	1.54	0.56	19.80	177
Mean	0.35	0.22.	0.78	3.10	6.11	12.28	23.51	18.62	16.23	7.67	2.90	0.97					242.42
SE	0.09	0.06	0.11	0.24	0.84	1.42	2.80	1.97	2.02	0.91	0.29	0.15					94.21
Min	0.04	0.02	0.12	1.59	1.36	0.72	5.31	7.20	5.19	2.84	1.17	0.28					104.08
Max	1.93	1.02	2.19	5.08	13.20	23.50	58.00	38.20	35.40	18.60	6.00	3.39					470.37

AVERAGE WATER TEMPERATURE

	J	F	M	A	M	J	J	A	S	O	N	D
1970	-0.7	-0.6	-0.3	1.1	6.8	9.3	13.5	13.9	10.2	4.0	-0.1	-0.6
1971	-0.6	-0.7	-0.2	1.7	6.9	9.3	13.2	13.3	10.1	4.9	0.7	-0.6
1972	-0.5	-0.6	-0.1	2.5	8.5	10.5	14.1	15.2	10.4	4.0	0.3	-0.6
1973	-0.6	-0.6	-0.2	1.7	6.9	9.2	11.8	12.7	9.0	4.4	0.2	-0.3
1974	-0.5	-0.5	-0.1	1.6	6.6	10.5	12.2	12.7	9.1	3.2	0.5	-0.3
1975	-0.6	-0.7	-0.3	1.2	5.8	10.5	12.5	14.1	12.0	6.3	0.5	-0.6
1976	-0.6	-0.5	-0.4	1.1	6.7	10.7	12.2	13.0	10.2	4.5	0.2	-0.5
1977	-0.7	-0.8	-0.6	1.7	5.2	9.8	12.5	13.2	10.5	4.2	-0.4	-0.5
1978	-0.8	-0.7	-0.3	1.5	7.0	10.5	13.1	13.3	9.0	3.8	0.2	-0.5
1979	-0.6	-0.4	0.2	1.9	7.1	10.6	11.4	13.7	8.8	4.3	-0.2	-0.4

1980	-0.8	-0.9	-0.5	1.1	5.9	9.1	12.7	12.5	9.1	5.6	0.6	-0.4
1981	-0.7	-0.5	0.2	2.8	7.6	11.9	15.2	15.1	10.3	5.7	-0.1	-0.3
1982	-0.7	-0.6	0.0	2.8	6.1	10.3	13.8	13.7	10.8	5.6	0.5	-0.5
1983	-0.7	-0.6	-0.1	1.5	6.2	10.3	12.6	13.3	10.5	5.7	0.2	-0.4
1984	-0.4	0.1	0.7	2.6	7.7	10.7	13.1	12.6	9.6	4.3	0.3	-0.7
1985	-0.5	0.2	1.2	2.2	7.2	10.1	12.2	13.3	9.2	4.4	-0.5	-0.4
1986	-0.7	-0.4	0.0	2.1	7.4	10.3	13.2	12.8	8.7	3.9	-0.4	-0.7
1987	-0.6	-0.4	0.9	2.7	6.4	9.6	13.5	13.3	10.5	5.5	0.2	-0.4
1988	-0.5	-0.5	-0.3	1.7	7.3	11.2	13.2	13.2	9.8	5.1	-0.5	-0.6
1989	-0.5	-0.4	-0.3	1.8	5.6	10.8	14.9	15.4	12.7	7.2	1.0	-0.6
1990	-0.3	0.3	1.4	2.9	7.6	10.7	13.4	13.6	10.5	4.7	1.1	-1.0
Mean	-0.6	-0.5	0.0	19	6.8	10.3	13.1	13.5	10.0	4.8	02	-0.5
SD	0.1	0.3	0.5	0.6	0.8	0.7	0.9	0.8	1.0	0.9	0.4	02
SE	0.0	0.1	-0.1	.0.1	02.	0.1	02	02	02	02	0.1	0.0
Min	-0.8	-0.9	-0.6	1.1	52	9.1	11.4	12.5	8.7	32	-0.5	-1.0
Max	-0.3	0.3	1.4	2.9	8.5	11.9	15.2	15.4	12.7	72	1.1	-0.3

AVERAGE AIR TEMPERATURE

	J	F	M	A	M	J	J	A	S	O	N	D
1970	-18.0	-15.3	-9.1	-2.8	4.7	7.0	11.3	10.8	5.6	-1.2	-8.1	-12
1971	-17.5	-13.2	-5.3	1.2	5.9	9.3	13.5	11.9	7.0	1.0	-5.3	-9.0
1972	-1Z0	-12.7	-4.2	1.2	6.8	9.2	12.7	13.4	6.8	0.8	-6.5	-13.2
1973	-17.6	-10.8	-6.4	1.2	5.4	8.2	11.7	7.9	7.5	1.7	-6.6	-12.7
1974	-16.1	-13.6	-8.5	-0.6	4.3	8.7	10.5	10.2	5.2	-0.2	-7.2	-13.9
1975	-17.5	-15.6	-7.9	-1.6	3.7	8.4	10.1	10.9	7.3	0.8	-8.4	-15.2
1976	-17.5	-13.2	-9.5	-1.5	3.9	8.1	9.2	9.4	5.1	-0.6	-8.1	-11.6
1977	-13.0	-11.7	-5.5	0.6	4.9	9.0	12.4	11.5	8.9	2.1	-7.5	-10.9
1978	-16.1	-11.6	-5.9	0.0	6.3	8.9	11.6	11.1	5.8	0.5	-8.0	-10.5
1979	-13.5	-10.7	-6.5	1.1	6.7	10.2	10.7	12.2	6.2	0.9	-6.1	-12.7

1980	-16.8	-13.4	-6.6	-0.8	4.4	8.7	11.2	10.2	6.4	0.5	-5.5	-10.1
1981	-13.5	-10.6	-5.5	0.7	&.7	10.1	13.0	12.2	6.3	0.3	-7.4	-11.7
1982	-12.8	-14.5	-5.4	-1.4	4.5	8.0	10.9	10.1	6.1	1.4	-6.5	-12.3
1983	-17.5	-15.8	-9.0	-2.8	4.6	7.6	10.0	9.7	6.0	0.9	-7.9	-13.1
1984	-16.0	-9.6	-4.8	1.1	5.0	9.1	10.9	9.9	5.6	0.1	-5.9	-10.1
1985	-17.4	-15.6	-9.3	-1.1	4.5	7.6	9.2	10.4	3.8	-1.1	-9.5	-14.1
1986	-21.9	-15.3	-10.4	-2.8	4.9	7.6	10.1	8.8	3.0	-2.9	-9.2	-13.5
1987	-16.3	-13.4	-7.0	-0.4	3.3	8.6	10.1	8.3	4.1	-1.3	-7.5	-11.1
1988	-13.6	-11.1	-8.1	-0.9	5.2	9.3	11.5	10.0	5.2	0.8	-6.7	-10.5
1989	-18.8	-15.3	-9.2	-1.9	4.5	8.0	11.0	9.8	6.2	-0.4	-8.8	-12.8
1990	-15.2	-14.5	-8.2	-2.1 ,	5.2	7.8	10.4	9.5	4.9	-2.1	-7.8	-13.7
Mean	-16.1	-132	-7.3	-0.6	5.0	8.5	11.0	10.4	5.9	0.1	-7.4	-12.1
SD	23	1.9	1.8	1.4	0.9	0.8	1.1	1.3	1.3	12	1.1	1.5
SE	0.5	0.4	0.4	0.3	02	02	0.2	0.3	0.3	0.3	02	0.3
Min	-21.9	-15.8	-10.4	-2.8	3.3	7.0	9.2	7.9	3.0	-2.9	-9.5	-152
Max	-12.0	-9.6	-4.2	12	6.8	10.2	13.5	13.4	8.9	2.1	-5.3	-9.0

WIND SPEED RECORDS (m/s) AT THREE STATIONS
a: Jianxigou
b: Gangca
c: Haiyian

	Jan			Feb			Mar			Apr			May			Jun
	a	b	c	a	b	c	a	b	c	a	b	c	a	b	c	a	b	c
1971		3.2			3.7			5.1			4.4			4.7			4.4
1972		2.9			3.3			4.2			4.1			4.1			3.9
1973		3.1			4.3			4.3			4.7			4.4			4.1
1974	2.7	2.7		2.9	3.5		4.4	4.7		3.7	4.6		3.2	4.4		3.2	4.5
1975	2.5	3		2.8	3.1		3.6	4.3		4.5	4.7		4.3	4.9		3.4	4.2
1976	28	28	2.2	27	2.9	2.6	35	3.3	3.7	4.6	41	35	3.1	3.3	35	2.8	3.1	2.7
1977	3.9	2.7	2.7	4.1	3.5	3.6	3.9	3.7	3.7	3.9	4	3.9	3.9	3.9	3.7	3.4	3.8	2.9
1978	2.7	3.3	1–9	3.4	4.0	2.9	3.3	3.9	3	3.5	3.8	3	4	4.5	3.7	3.3	4.2	3
1979	3.9	3.6	3.5	3.2	3.8	2.9	4.8	4.8	4.4	5.5	5.5	4.9	4.3	4.2	4.4	3.5	4.5	3.1

1980	3.2	3.6	2.5	4	4.0	3.5	4.2	4.3	3.8	4.3	4.9	4	3.4	4.8	3.8	3.3	4	3.6
1981	2.7	2.9	2.5	4.1	3.6	3.6	3.4	4.1	3.1	3.4	4.5	3.5	3.3	4.6	3.3	2.9	4.1	3.3
1982	2.9	3.0	2.3	2.3	3.0	2.3	3.4	4	4	2.8	4.1	3.1	3.5	4.6	3.5	3	4	3
1983	2.6	2.6	22	3.5	3.9	3.4	3.2	3.9	3.7	3.7	4.3	4.2	3	3.9	3.1	2.9	3.3	2.5
1984	3.0	3.5	2.6	4	3.9	3.4	4.4	5.2	4	3.7	4.3	3.6	3.3	4.3	2.8	2.9	3.7	3
1985	3.5	3.6	2.8	4.6	4.4	4.5	3.2	4	3.8	3.8	4.8	3.3	2.9	4	3	3.4	4.1	2.8
1986	2.3	2.0	2.4	3.7	3.7	3.4	3.4	4.1	3.7	3.2	4.1	3.6	3.4	4.2	3.2	2.9	3	2.7
1987	3.5	2.8	2.7	3.4	3.6	2.7	5.1	4.3	4	4.4	4.3	3.7	3.1	4.1	3.3	3	4.1	3
1988	4.1	3.5	2.7	3.9	3.9	3.8	4	4.2	3.8	3.7	4.1	3.3	3.5	4	32	3.3	3.4	3.1
1989	2.7	3.0	2.0	2.4	3.7	2.5	2.8	3.3	3.1	3	3.6	2.9	2.9	3.6	2.8	2.8	3.3	2.5
1990	4	3.3	2.2	3	2.9	2.5	3.4	3.4	2.9	3.6	4	2.9	3.3	3.6	3.1	3.5	3.4	2.4

Mean	3.1	3.1	2.5	3.4	3.6	3.2	3.8	4.2	3.6	3.6	4.3	3.6	3.4	4.2	3.3	3.1	3.9	29
SD	0.6	0.4	0.4	06	0.4	0.6	0.6	as	0.4	0.6	0.4	0.5	0.4	0.4	0.4	0.2	0.5	0.3

	Jul			Aug			Sep			Oct			Nov			Dec			Mean
	a	b	c	a	b	c	a	b	c	a	b	c	a	b	c	a	b	c	a	b	c	ALL
1971		4.8			4			3.5			3			4.7			4.1			4.1		4.1
1972		3.8			3.4			3.3			4			4.6			3.9			3.8		3.8
1973		4.1			3.7			3.2			3.7			4.4			4.1			4.0		4.0
1974	3.1	3.9		2.8	3.6		3.1	3.6		4.1	3.9		3.7	3.7		3.5	3.8		3.4	3.9		3.7
1975	2.9	3.5		2.8	3		3	3.1		3.4	2.6		4.1	3.5		3.9	3		3.4	3.6		3.5
1976	3	2.9	2.9	2.7	2.8	2.6	3.1	3.1	2.9	3.9	3	2.7	4.6	3.4	3	4.2	3.5	3	3.4	3.2	29	3.2
1977	3.4	3.7	3.2	2.5	3	2.3	2.7	3.5	2.7	3.5	3.9	2.1	3.9	4.6	1.7	3.6	3.6	1.6	3.6	3.7	2.8	3.4
1978	3.4	3.7	3	2.7	3.6	2.8	3.3	4	3	3.7	3.6	2.4	4.2	3.9	2.6	3.6	3.8	2.2	3.4	3.9	2.8	3.4
1979	3.1	3.4	3.1	2.5	2.9	2.9	3	3.3	3	3.5	3.6	2.7	5.6	4.5	3.4	3.4	3.6	2.3	3.9	4.0	3.4	3.3

1980	2.6	3.4	2.9	2.5	3.3	2.7	2.8	2.9	2.8	3.5	3.4	2.6	3.6	3.9	2.5	4.8	4.3	3.4	3.5	3.9	3.2	3.6
1981	2.5	3.3	3	2.8	3.5	3.1	2.8	3.2	3.2	4.3	2.9	3.3	5.2	3.8	3.6	3.5	3.3	2.8	3.4	3.7	3.2	3.4
1982	2.8	3.6	2.6	2.9	3.6	2.8	2.6	2.8	2.8	3.3	3.2	2.4	3.7	3.6	2.3	4.1	3.4	2.3	3.1	3.6	2.5	3.1
1983	2.6	4.2	2.6	3.2	4.1	2.6	3.2	3.3	2.3	3.1	3.3	2.7	3.9	4	2.4	3.5	3.7	2.3	3.2	3.7	2.5	3.2
1984	2.3	3.7	2.4	3.3	4.2	2.9	2.9	3.2	2.5	3.5	3.8	2.8	3.6	3.7	2.1	4	3.8	2.3	3.4	3.9	2.9	3.4
1985	2.9	4.1	2.7	2.9	3.5	2.6	2.8	3.2	2.6	3.5	3.5	2.3	5.3	4.5	2.9	4.1	3.1	2.8	3.6	3.9	3.0	3.5
1986	2.6	3.4	2.4	2.9	3.3	2	3.3	3.2	2.2	4.3	4	2.5	3.9	3.6	2.2	3.6	3.2	1.7	3.3	3.5	27	3.2
1987	2.7	3.4	2.2	3.3	3.7	2.5	3.2	3.1	2.5	3.8	3.5	3.1	4.4	3.4	2.3	4.3	3.4	2.6	3.7	3.6	2.9	3.4
1988	3	3.6	2.4	2.6	3.2	2.4	2.7	2.8	2.5	3.1	2.9	3	3.9	3.3	2.1	3.8	3.3	2.1	3.5	3.5	2.9	3.3
1989	2.6	2.8	2.6	2.6	2.9	2.5	2.7	2.9	2.6	3.6	3.2	2.2	3.6	3.1	2.1	3.4	2.8	1.7	2.9	3.1	2.5	2.8
1990	3.2	3.5	2.8	3.1	3.2	2.5	3.1	3.3	2.1	3.5	3.5	2.2	4.1	3.3	2.3	3.3	3	2	3.4	3.4	2.5	3.1

Mean	29	3.6	27	26	3.4	26	3.0	3.2	26	3.6	3.4	26	4.2	3.9	2.S	3.8	3.5	23	3.4	3.7	29	3.4
SD	0.3	0.3	0.3	0.3	0.4	0.3	0.2	0.3	0.3	0.3	0.4	0.3	0.6	0.4	0.S	0.4	0.4	0.5	0.2	0.2	0.2	0.2

WIND DIRECTION AT THREE STATIONS. 1971–90
a: Jianxigou
b: Gangca
c: Haiyian

Jan

Feb

Mar

Apr

May

Jun

1971

NNW

1972

NNW

1973

NNW

1974

NNW

WNW

NNW

1975

NNW

SSW

WSW

NNE

1976

NNW

SSW

NNW

WNW

SSW

SSE

1977

NNW

WSW

SSW

SSE

NNW

WNW

NNW

WSW

NNW

1978

SSW

WNW

ESE

SSW

WSW

NNE

NNW

1979

WNW

WSW

ENE

NNW

1980

NNW

SSW

ESE

NNW

ESE

WSW

ENE

NNW

1981

WNW

SSE

NNW

SSW

SSE

NNW

SSW

SSE

WSW

SSE

NNW

SSE

NNW

1982

WNW

NNW

WNW

NNW

1983

NNW

1984

SSE

NNW

SSE

NNW

1985

WSW

NNW

WSW

NNW

SSW

ESE

NNW

1986

WNW

NNW

ENE

NNW

1987

WSW

NNW

ESE

NNW

WSW

NNW

1988

WSW

NNW

ESE

ENE

NNW

WSW

NNW

SSE

NNW

1989

WSW

NNW

1990

NNW

SSW

NNW

Mode

NNW

SSW

NNW

…

NNW

…

NNW

Jul

Aug

Sep

Oct

Nov

Dec