Point Forecast: Mount St Helens WA  46.18N 122.18W (Elev. 1891 m)	Last Update: 5:40 pm PDT May 11, 2024

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Weather Elements Weather/Precipitation Fire Weather Temperature (°C) Dewpoint (°C) Heat Index (°C) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Fog Mixing Height  x100ftx100m Haines Index Lightning Activity Level Trans. Wind  ktmphkm/hm/s

48-Hour Period Starting: 6pm Sat, May 11 20247pm Sat, May 11 20248pm Sat, May 11 20249pm Sat, May 11 202410pm Sat, May 11 202411pm Sat, May 11 202412am Sun, May 12 20241am Sun, May 12 20242am Sun, May 12 20243am Sun, May 12 20244am Sun, May 12 20245am Sun, May 12 20246am Sun, May 12 20247am Sun, May 12 20248am Sun, May 12 20249am Sun, May 12 202410am Sun, May 12 202411am Sun, May 12 202412pm Sun, May 12 20241pm Sun, May 12 20242pm Sun, May 12 20243pm Sun, May 12 20244pm Sun, May 12 20245pm Sun, May 12 20246pm Sun, May 12 20247pm Sun, May 12 20248pm Sun, May 12 20249pm Sun, May 12 202410pm Sun, May 12 202411pm Sun, May 12 202412am Mon, May 13 20241am Mon, May 13 20242am Mon, May 13 20243am Mon, May 13 20244am Mon, May 13 20245am Mon, May 13 20246am Mon, May 13 20247am Mon, May 13 20248am Mon, May 13 20249am Mon, May 13 202410am Mon, May 13 202411am Mon, May 13 202412pm Mon, May 13 20241pm Mon, May 13 20242pm Mon, May 13 20243pm Mon, May 13 20244pm Mon, May 13 20245pm Mon, May 13 20246pm Mon, May 13 20247pm Mon, May 13 20248pm Mon, May 13 20249pm Mon, May 13 202410pm Mon, May 13 202411pm Mon, May 13 202412am Tue, May 14 20241am Tue, May 14 20242am Tue, May 14 20243am Tue, May 14 20244am Tue, May 14 20245am Tue, May 14 20246am Tue, May 14 20247am Tue, May 14 20248am Tue, May 14 20249am Tue, May 14 202410am Tue, May 14 202411am Tue, May 14 202412pm Tue, May 14 20241pm Tue, May 14 20242pm Tue, May 14 20243pm Tue, May 14 20244pm Tue, May 14 20245pm Tue, May 14 20246pm Tue, May 14 20247pm Tue, May 14 20248pm Tue, May 14 20249pm Tue, May 14 202410pm Tue, May 14 202411pm Tue, May 14 202412am Wed, May 15 20241am Wed, May 15 20242am Wed, May 15 20243am Wed, May 15 20244am Wed, May 15 20245am Wed, May 15 20246am Wed, May 15 20247am Wed, May 15 20248am Wed, May 15 20249am Wed, May 15 202410am Wed, May 15 202411am Wed, May 15 202412pm Wed, May 15 20241pm Wed, May 15 20242pm Wed, May 15 20243pm Wed, May 15 20244pm Wed, May 15 20245pm Wed, May 15 20246pm Wed, May 15 20247pm Wed, May 15 20248pm Wed, May 15 20249pm Wed, May 15 202410pm Wed, May 15 202411pm Wed, May 15 202412am Thu, May 16 20241am Thu, May 16 20242am Thu, May 16 20243am Thu, May 16 20244am Thu, May 16 20245am Thu, May 16 2024

Date	05/11						05/12
Hour (PDT)	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17
Temperature (°C)	12	12	10	9	8	7	7	7	6	6	6	4	5	6	7	9	9	9	10	10	11	11	11	10
Dewpoint (°C)	5	6	4	3	2	0	-1	-1	-3	-4	-4	-6	-4	-3	-2	-1	-2	-2	-1	0	1	2	2	2
Heat Index (°C)
Surface Wind (mph)	10	10	9	10	8	7	7	6	6	6	7	6	6	6	6	6	7	8	9	9	9	10	13	14
Wind Dir	NW	NW	NW	NW	NW	WNW	WNW	WNW	WNW	NW	NW	NW	NW	NW	NW	NW	NW	NW	WNW	WNW	NW	NW	NW	NW
Gust
Sky Cover (%)	1	1	1	1	0	0	1	0	0	5	6	1	7	15	14	7	5	5	5	8	2	0	2	3
Precipitation Potential (%)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	61	66	69	69	66	61	58	56	54	51	49	49	50	51	51	49	46	46	47	50	53	55	56	58
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date							05/13
Hour (PDT)	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17
Temperature (°C)	9	8	7	5	4	4	4	4	4	3	3	2	2	2	2	3	4	4	5	5	6	6	6	6
Dewpoint (°C)	2	2	1	-1	-1	-1	-1	-1	-1	-1	-1	-2	-2	-2	-2	-1	-1	0	0	1	1	1	1	2
Heat Index (°C)
Surface Wind (mph)	14	14	14	14	14	13	13	13	10	10	10	10	10	10	10	10	10	9	9	9	13	13	13	14
Wind Dir	NW	NW	NW	NW	NW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	W	W	W	WNW	WNW	WNW	WNW
Gust
Sky Cover (%)	3	3	7	7	7	16	16	16	20	20	20	42	42	42	63	63	63	57	57	57	54	54	54	44
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	4	4	4	4	4	4	7	7	7	7	7	7	4
Relative Humidity (%)	60	63	64	64	71	72	72	71	71	73	75	76	76	75	74	74	73	73	72	72	72	73	74	75
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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