Weather and other factors
affecting early winter TASL counts

 

	Temperature (°F)				Precipitation (inches)				Wind speed (knots)				% sunlight				NAO index		Summary of factors affecting counts
	October		November		October		November		October		November		October		November		October	November
Year	AVG	± from AVG	AVG	± from AVG	AVG	± from AVG	AVG	± from AVG	AVG	± from AVG	AVG	± from AVG	AVG	± from AVG	AVG	± from AVG
1980	52.4	-2.4	41.2	-4	4.14	0.71	3.09	-1.05			13.3	0.7					-1.3	-0.9	Missing some current sites
1981	51.2	-3.6	43.9	-1.3	3.43	0	4.78	0.64	11.2	-0.6	12.4	-0.2	49	-7	49	-1	-2	0.4	Missing some current sites, very rough seas.
1982	54.2	-0.6	47.6	2.4	3.19	-0.24	3.42	-0.72	11.3	-0.5	12.4	-0.2	66	10	45	-5	-0.5	1.4	Missing some current sites,heavy rain, no data from Hull and Weymouth.
1983	55.2	0.4	46.1	0.9	3.74	0.31	8.89	4.75	11.5	-0.3	12	-0.6	61	5	47	-3	0.6	-1.3	Missing some current sites.
1984	53.3	-1.5	44.6	-0.6	5.18	1.75	1.68	-2.46	10	-1.8			50	-6			-0.2	-0.4
1985	55.4	0.6	45.4	0.2	1.65	-1.78	6.39	2.25			11.9	-0.7	61	5	36	-14	0.9	-1.4
1986	53.9	-0.9	42.3	-2.9	3.27	-0.16	6.01	1.87	11.9	0.1			58	2	47	-3	2.3	1.6
1987	54.3	-0.5	43.9	-1.3	2.73	-0.7	3.49	-0.65	12.8	1	13.9	1.3	68	12	57	7	0.3	0.5
1988	50.8	-4	46.7	1.5	1.6	-1.83	6.57	2.43	13.9	2.1	13.9	1.3	50	-6	54	4	-0.3	-0.7	No data from Nahant and 75% of Hull.
1989	55.3	0.5	42.8	-2.4	5.73	2.3	4.13	-0.01	12	0.2	12.9	0.3	60	4	50	0	0.2	-0.1	No access to Deer I.
1990	58.3	3.5	48.5	3.3	7.36	3.93	1.39	-2.75	13.5	1.7	15	2.4	56	0	60	10	0	-0.4	No access to Deer I., rough seas.d
1991	56.4	1.6	45.2	0	4.27	0.84	4.06	-0.08	12.3	0.5	11.9	-0.7	63	7	40	-10	-0.1	0.7	Drizzle, rough seas, no data from 85% of Hull.
1992	52.5	-2.3	42.9	-2.3	1.62	-1.81	6.14	2	11.1	-0.7	10.5	-2.1	58	2	41	-9	-1.5	0.9
1993	52.3	-2.5	45.6	0.4	3.61	0.18	2.86	-1.28	11.8	0	12.4	-0.2	58	2	59	9	-0.1	2.1
1994	55.5	0.7	49	3.8	0.41	-3.02	4.31	0.17	11.3	-0.5	13.5	0.9	65	9	59	9	-0.3	0.9	Rough seas.
1995	58.4	3.6	41.9	-3.3	6.42	2.99	5.13	0.99	13	1.2	13.5	0.9	61	5	35	-15	0.4	-1.3
1996	53.4	-1.4	40.3	-4.9	10.7	7.23	2.29	-1.85	11.2	-0.6	10.1	-2.5	61	5	53	3	-0.1	0
1997	52.8	-2	41.7	-3.5	1.78	-1.65	5.86	1.72	9.5	-2.3	12.7	0.1	57	1	50	0	-1.5	-1
1998	54.5	-0.3	44.6	-0.6	5.38	1.95	1.38	-2.76	12.4	0.6	11.1	-1.5	64	8	53	3	0	-0.7
1999	53	-1.8	48	2.8	4.3	0.87	2.14	-2	11.2	-0.6	12.5	-0.1	64	8	56	6	-0.2	0.8
2000	53.9	-0.9	43.6	-1.6	2.86	-0.57	4.5	0.36	11.2	-0.6	10.8	-1.8	56	0	46	-4	1.1	-0.7	A couple of sites not covered.
2001	56.2	1.4	48.3	3.1	0.97	-2.46	0.73	-3.41	11	-0.8	10.4	-2.2	67	11	55	5	0	1.2
2002	52.4	-2.4	42.9	-2.3	3.48	0.05	5.03	0.89	11.4	-0.4	12.5	-0.1	54	-2	40	-10	-1.4	-0.5