Point Forecast: 3 Miles E Mount St Helens WA  46.19N 122.12W (Elev. 3668 ft)	Last Update: 4:45 pm PDT May 21, 2025

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

48-Hour Period Starting: 4pm Wed, May 21 20255pm Wed, May 21 20256pm Wed, May 21 20257pm Wed, May 21 20258pm Wed, May 21 20259pm Wed, May 21 202510pm Wed, May 21 202511pm Wed, May 21 202512am Thu, May 22 20251am Thu, May 22 20252am Thu, May 22 20253am Thu, May 22 20254am Thu, May 22 20255am Thu, May 22 20256am Thu, May 22 20257am Thu, May 22 20258am Thu, May 22 20259am Thu, May 22 202510am Thu, May 22 202511am Thu, May 22 202512pm Thu, May 22 20251pm Thu, May 22 20252pm Thu, May 22 20253pm Thu, May 22 20254pm Thu, May 22 20255pm Thu, May 22 20256pm Thu, May 22 20257pm Thu, May 22 20258pm Thu, May 22 20259pm Thu, May 22 202510pm Thu, May 22 202511pm Thu, May 22 202512am Fri, May 23 20251am Fri, May 23 20252am Fri, May 23 20253am Fri, May 23 20254am Fri, May 23 20255am Fri, May 23 20256am Fri, May 23 20257am Fri, May 23 20258am Fri, May 23 20259am Fri, May 23 202510am Fri, May 23 202511am Fri, May 23 202512pm Fri, May 23 20251pm Fri, May 23 20252pm Fri, May 23 20253pm Fri, May 23 20254pm Fri, May 23 20255pm Fri, May 23 20256pm Fri, May 23 20257pm Fri, May 23 20258pm Fri, May 23 20259pm Fri, May 23 202510pm Fri, May 23 202511pm Fri, May 23 202512am Sat, May 24 20251am Sat, May 24 20252am Sat, May 24 20253am Sat, May 24 20254am Sat, May 24 20255am Sat, May 24 20256am Sat, May 24 20257am Sat, May 24 20258am Sat, May 24 20259am Sat, May 24 202510am Sat, May 24 202511am Sat, May 24 202512pm Sat, May 24 20251pm Sat, May 24 20252pm Sat, May 24 20253pm Sat, May 24 20254pm Sat, May 24 20255pm Sat, May 24 20256pm Sat, May 24 20257pm Sat, May 24 20258pm Sat, May 24 20259pm Sat, May 24 202510pm Sat, May 24 202511pm Sat, May 24 202512am Sun, May 25 20251am Sun, May 25 20252am Sun, May 25 20253am Sun, May 25 20254am Sun, May 25 20255am Sun, May 25 20256am Sun, May 25 20257am Sun, May 25 20258am Sun, May 25 20259am Sun, May 25 202510am Sun, May 25 202511am Sun, May 25 202512pm Sun, May 25 20251pm Sun, May 25 20252pm Sun, May 25 20253pm Sun, May 25 20254pm Sun, May 25 20255pm Sun, May 25 20256pm Sun, May 25 20257pm Sun, May 25 20258pm Sun, May 25 20259pm Sun, May 25 202510pm Sun, May 25 202511pm Sun, May 25 202512am Mon, May 26 20251am Mon, May 26 20252am Mon, May 26 20253am Mon, May 26 2025

Date	05/21								05/22
Hour (PDT)	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15
Temperature (°F)	50	51	51	49	48	46	45	44	44	43	42	42	41	40	41	41	41	41	42	42	44	44	44	44
Dewpoint (°F)	35	36	36	35	35	34	34	33	36	37	36	37	35	35	36	36	36	36	38	38	40	40	40	39
Heat Index (°F)
Surface Wind (mph)	3	5	5	3	3	3	2	2	2	2	2	2	2	2	2	2	2	2	2	3	3	3	5	5
Wind Dir	E	NE	N	NNW	N	NNW	NW	SSW	SSW	SW	W	W	WNW	NNW	WNW	W	SW	WSW	WSW	WSW	WSW	WSW	W	W
Gust
Sky Cover (%)	57	65	76	75	83	82	87	87	88	90	88	82	73	81	86	85	74	73	69	60	60	60	60	60
Precipitation Potential (%)	4	6	6	7	13	10	19	33	48	63	59	51	49	54	54	54	54	54	54	40	40	40	40	40
Relative Humidity (%)	57	57	57	58	60	63	65	66	72	78	79	81	80	82	83	83	83	83	85	87	86	86	85	84
Rain	--	--	--	--	--	--	SChc	Chc	Chc	Lkly	Lkly	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date									05/23
Hour (PDT)	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15
Temperature (°F)	44	44	45	44	43	42	41	40	39	39	38	37	37	36	37	38	39	42	44	47	48	50	51	51
Dewpoint (°F)	39	39	40	38	37	37	36	36	35	34	34	33	32	31	31	32	32	33	34	36	37	38	39	39
Heat Index (°F)
Surface Wind (mph)	5	7	7	7	6	6	6	3	3	3	2	2	2	2	2	2	2	2	2	5	5	5	7	7
Wind Dir	W	WNW	WNW	WNW	WNW	WNW	WNW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	W	W	W	W	W
Gust
Sky Cover (%)	60	50	50	50	51	51	51	37	37	37	43	43	43	48	48	48	42	42	42	26	26	26	39	39
Precipitation Potential (%)	40	11	11	11	11	11	11	2	2	2	2	2	2	4	4	4	4	4	4	11	11	11	11	11
Relative Humidity (%)	83	82	81	80	79	81	82	84	84	84	84	84	83	83	80	78	75	72	68	65	64	64	63	63
Rain	Chc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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