Table 2. Database of precipitation associated with landslides that occurred during the 2001-2002 wet season, Seattle and surrounding areas.

Landslide	Inferred date/time	Source of	3-day (72 hr)	15-day precip.	Peak 6 hr intensity	Time of peak 6-hour	Approx.distance
Number	of occurrence	precipitation data	precip. prior to	prior to 72 hr	during 72 hr period	intensity (hours prior	(rain gauge to
			to landslide.	precip. (inches)	prior to landslide	to landslide occurrence)	landslide,
			(inches)		(in./hr)		miles)

1	11/1/1997	Seattle rain gauge no. 20	0.38 - 0.64	2.62 - 3.00	*	*	2

2	11/14/01 (~6:00 a.m.)	Tacoma Narrows AP (NWS)	2.89	1.15	0.17	0	6
		Tacoma 1 (NWS)	.79 - 4.99	0.68 - 1.51	*	*	2

3	11/14/01 (~8:00 a.m.)	Seattle rain gauge no.12	2.11	1.02	0.11	13	1

4	11/14/01 (~10:00 a.m.)	Sand Point (NWS)	2.43	1.09	0.10	0	8
		Seattle rain gauge no. 20	2.47	1.31	0.12	0	10

5	11/14/01 (~11:30 a.m.)	Tacoma Narrows AP (NWS)	4.03	1.03	0.22	0	4
		Tacoma 1 (NWS)	.79 - 4.99	0.68 - 1.51	*	*	5

6	11/14/01 (~3:00 p.m.)	Seattle rain gauge no 2	3.00	0.69	0.12	1	2

7	11/14/01 (Between midnight on 11/13 and	Kent (NWS)	1.01 - 3.58	1.37 - 1.4	*	*	4
	6:00 p.m. on 11/14)	SeaTac (NWS)	1.66 - 4.22	1.15	≤0.21	*	8

8	11/14/01 (between noon and 4:00 p.m)	Kent (NWS)	1.01 - 3.58	1.37 - 1.4	*	*	4
		SeaTac (NWS)	3.86 - 4.15	0.92	0.21	0 - 3	8

9	On 11/14/2001	Seattle rain gauge no. 1	1.18 - 2.67	0.82 - 1.29	≤0.12	*	5

10	11/15/01 (early morning between mid-	Seattle rain gauge no. 2	3.16 - 3.17	0.71 - 0.72	≤0.13	*	2
	night on 11/14 and 7:00 a.m. on 11/15).

11	11/15/01 (early morning between mid-	Seattle rain gauge no. 2	3.16 - 3.17	0.71 - 0.72	≤0.13	*	2
	night on 11/14 and 7:00 a.m. on 11/15).

12	11/15/01 (between 10:00 a.m. and noon).	Seattle rain gauge no. 2	3.09 -3.17	0.71 - 0.84	≤0.13	*	2

13	11/15/01 (between noon and 5:00 p.m.)	Seattle rain gauge no. 2	3.17	0.96 - 0.98	≤0.13	*	2

14	11/15/01 (between noon and 5:00 p.m.).	Seattle rain gauge no. 2	3.17	0.96 - 0.98	≤0.13	*	2

15	11/14/1997	Seattle rain gauge no. 2	3.06 - 3.14	0.73 - 1.1	≤0.13	*	2

16	Between 11/15/01 and 11/19/01	Seattle rain gauge no. 2	.05 - 3.06	1.10 - 3.92	*	*	2


Table 2 cont'd		(see Table 1 for landslide location, timing, and descriptive information)

Landslide	Inferred date/time	Source of	3-day (72 hr)	15-day precip.	Peak 6 hr intensity	Time of peak 6-hour	Approx.distance
Number	of occurrence	precipitation data	precip. prior to	prior to 72 hr	during 72 hr period	intensity (hours prior	(rain gauge to
			to landslide.	precip. (inches)	prior to landslide	to landslide occurrence)	landslide,
			(inches)		(in./hr)		miles)

17	On or before 11/19/01	Seattle rain gauge no. 2	*	*	*	*	2

18	11/21/01 (6:00 a.m.)	Seattle rain gauge no. 8	1.54	3.5	0.08	17	1

19	On or before 11/21/01	Seattle rain gauge no. 8	*	*	*	*	2

20	On 11/21/01	Seattle rain gauge no. 1	1.33 - 1.51	3.28	≤0.06	*	2
		Seattle rain gauge no. 2	1.47 - 1.59	3.75	≤0.07	*	2

21	Prior to 1:30 a.m. on 11/23/01	*	*	*	*	*	*

22	11/23/01(morning, between midnight on 11/22	Seattle rain gauge no. 2	2.01 - 2.06	4.49 - 4.58	≤0.11	*	2
	and 9:00 a.m. on 11/23)

23	11/24-25/01 (between midnight 11/23	Seattle rain gauge no. 2	0.22 - 1.65	4.99 - 6.5	≤0.01	*	2
	and midnight 11/25).

24	Between 3:00 p.m. on 11/14 and 10:00 p.m.	Seattle rain gauge no. 2	*	*	*	*	2
	on 11/26.

25	On or before 11/26/01	Seattle rain gauge no.2	*	*	*	*	2

26	11/29/01 (~6:30 a.m.)	Bainbridge Island (AWS	1.68 - 1.95	6.48 - 6.53	*	*	6
		School Net)
		Seattle rain gauge no. 12	1.68	6.39	0.13	20	8

27	11/29/01 (~3:30 a.m.)	Snohomish County AP (NWS)	1.27	4.09	0.09	1	4

28	On or before 12/3/01	Seattle rain gauge no. 18	*	*	*	*	*

29	On or before 12/13/01	Seattle rain gauge no. 10	*	*	*	*	1

30	On or before 12/13/01	Seattle rain gauge no. 15	*	*	*	*	2

31	On 12/14/01	Sand Point (NWS)	0.32 - 1.95	2.23	≤0.18	*	8

32	On 12/16/01 (between noon and 4:00 p.m.)	Seattle rain gauge no. 18	2.36 - 2.38	4.32 - 4.83	0.12 - 0.15	*	2




Table 2 cont'd		(see Table 1 for landslide location, timing, and descriptive information)

Landslide	Inferred date/time	Source of	3-day (72 hr)	15-day precip.	Peak 6 hr intensity	Time of peak 6-hour	Approx.distance
Number	of occurrence	precipitation data	precip. prior to	prior to 72 hr	during 72 hr period	intensity (hours prior	(rain gauge to
			to landslide.	precip. (inches)	prior to landslide	to landslide occurrence)	landslide,
			(inches)		(in./hr)		miles)

33	On 12/16/01 (between noon and 4:00 p.m.)	Seattle rain gauge no. 16	2.14 - 2.41	4.32 - 4.83	≤0.15	*	3

34	On 12/16/01 (between 2:00 p.m. and 6:00 p.m.)	Seattle rain gauge no. 18	2.11	4.64 - 4.77	≤0.12	*	2

35	On 12/16/01 (between noon and 4:00 p.m.)	Seattle rain gauge no. 15	2.04 - 2.34	4.06 - 4.58	≤0.15	*	2

36	On 12/16/01 (between noon and 4:00 p.m.)	Seattle rain gauge no. 11	1.83 - 1.91	3.35 - 3.67	≤0.12	*	1

37	On 12/16/01	Seattle rain gauge no. 4	0.61 - 1.57	2.27 - 2.99	≤0.08	*	3

38	At 7:30 p.m on 12/16/01	SeaTac AP (NWS)	1.57	4.04	0.09	7	2

39	On 12/16/01	Seattle rain gauge no. 1	0.85 - 1.87	2.67 - 3.62	≤0.09	*	3

40	On 12/16/01	Seattle rain gauge no. 11	1.72 - 1.92	3.75 - 4.01	≤0.13	*	1


41	On 12/18/01	Seattle rain gauge no. 2	1.48 - 1.96	3.71 - 3.81	*	*	2

42	On 12/18/01	Seattle rain gauge no. 18	1.72 - 2.19	4.53 - 4.62	*	*	1

43	On 12/19/01	Seattle rain gauge no. 11	0.12 - 1.40	3.57 - 4.24	*	*	1

44	1/7/02 (morning prior	*	*	*	*	*	*
	to 9:00 a.m.)

45	Between midnight on 1/6/02	Seattle rain gauge no. 11	.96 - 2.43	0.87 - 0.95	≤0.09	*	2
	and 3:00 p.m. on 1/8/02	Seattle rain gauge no. 12	0.48 - 2.86	1.01 - 1.23	≤0.11	*	3

46	Between midnight on 1/6/02	Seattle rain gauge no. 11	.96 - 2.43	0.87 - 0.95	≤0.09	*	2
	and 3:00 p.m. on 1/8/02	Seattle rain gauge no. 12	0.48 - 2.86	1.01 - 1.23	≤0.11	*	3

47	Between 8:00 a.m. on 1/6/02	Bremerton, WA (NWS)	0.83 - 7.73	1.77 - 1.89	*	*	2
	and 8:00 a.m. on 1/8/02

48	Between 8:00 a.m. on 1/6/02	Bainbridge Island (AWS	0.53 - 3.57	1.08 - 1.68	*	*	8
	and 8:00 a.m. on 1/8/02	School Net)


Table 2 cont'd		(see Table 1 for landslide location, timing, and descriptive information)

Landslide	Inferred date/time	Source of	3-day (72 hr)	15-day precip.	Peak 6 hr intensity	Time of peak 6-hour	Approx.distance
Number	of occurrence	precipitation data	precip. prior to	prior to 72 hr	during 72 hr period	intensity (hours prior	(rain gauge to
			to landslide.	precip. (inches)	prior to landslide	to landslide occurrence)	landslide,
			(inches)		(in./hr)		miles)

49	Between 8:00 a.m. on 1/6/02	Bainbridge Island (AWS	0.53 - 3.57	1.08 - 1.68	*	*	4
	and 8:00 a.m. on 1/8/02	School Net)

50	Between 8:00 a.m. on 1/6/02	Bremerton, WA (NWS)	0.83 - 7.73	1.77 - 1.89	*	*	2
	and 8:00 a.m. on 1/8/02

51	Between 8:00 a.m. on 1/6/02	Bremerton, WA (NWS)	0.83 - 7.73	1.77 - 1.89	*	*	2
	and 8:00 a.m. on 1/8/02

52	Between 8:00 a.m. on 1/6/02	Bremerton, WA (NWS)	0.83 - 7.73	1.77 - 1.89	*	*	2
	and 8:00 a.m. on 1/8/02

53	On or before 1/9/02	*	*	*	*	*	*

54	1/10/02 (morning)	Seattle rain gauge no. 20	.72 - 1.36	1.90 - 2.41	≤0.08	*	10
		Sand Point (NWS)	0.76 - 1.40	1.69 - 2.34	≤0.09	*	8

55	On or before 1/10/02	*	*	*	*	*	*

56	On or before 1/15/02	*	*	*	*	*	*

57	On or before 1/25/02	*	*	*	*	*	*

58	On or before 1/25/02	*	*	*	*	*	*

59	On or before 1/30/02	*	*	*	*	*	*


* Precipitation data and(or) time of occurrence information is missing, undetermined, or insufficient

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