Station HLNM4 - Search and Rescue Data

9087031 - Holland, MI
42.773 N 86.213 W (42°46'24" N 86°12'46" W)

Average surface winds - six hour block.

Date (UTC)	Average Wind Dir (True)	Average Wind Spd (Knots)	Wind Obs	Average Seas (Feet)	Air Temp. (Degrees F.)	Air Temp. Obs	Water Temp. (Degrees F.)	Water Temp. Obs
2025-12-28 1200Z	100	11	38	-	42	23	34	35
2025-12-28 0600Z	91	13	60	-	37	22	34	51
2025-12-28 0000Z	110	9	60	-	36	33	34	54
2025-12-27 1800Z	115	6	60	-	37	24	34	54
2025-12-27 1200Z	86	5	51	-	35	30	34	52
2025-12-27 0600Z	27	4	51	-	37	34	34	43
2025-12-27 0000Z	348	4	58	-	36	26	34	50
2025-12-26 1800Z	22	2	60	-	36	24	34	48
2025-12-26 1200Z	101	11	60	-	36	33	34	48
2025-12-26 0600Z	89	15	60	-	35	27	33	51
2025-12-26 0000Z	83	13	60	-	36	39	33	57
2025-12-25 1800Z	71	10	60	-	39	30	33	54
2025-12-25 1200Z	20	5	60	-	35	25	33	51
2025-12-25 0600Z	77	2	60	-	38	27	33	51
2025-12-25 0000Z	105	4	60	-	39	36	33	54
2025-12-24 1800Z	101	7	60	-	37	30	33	48
2025-12-24 1200Z	65	9	60	-	33	33	33	48
2025-12-24 0600Z	350	6	60	-	36	36	33	51
2025-12-24 0000Z	272	5	60	-	39	39	33	51
2025-12-23 1800Z	260	8	60	-	39	27	33	60

The six-hour averages are calculated as follows: