Point Forecast: Mount St Helens WA  46.18N 122.18W (Elev. 1891 m)	Last Update: 10:46 pm PDT Mar 21, 2025

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

48-Hour Period Starting: 11pm Fri, Mar 21 202512am Sat, Mar 22 20251am Sat, Mar 22 20252am Sat, Mar 22 20253am Sat, Mar 22 20254am Sat, Mar 22 20255am Sat, Mar 22 20256am Sat, Mar 22 20257am Sat, Mar 22 20258am Sat, Mar 22 20259am Sat, Mar 22 202510am Sat, Mar 22 202511am Sat, Mar 22 202512pm Sat, Mar 22 20251pm Sat, Mar 22 20252pm Sat, Mar 22 20253pm Sat, Mar 22 20254pm Sat, Mar 22 20255pm Sat, Mar 22 20256pm Sat, Mar 22 20257pm Sat, Mar 22 20258pm Sat, Mar 22 20259pm Sat, Mar 22 202510pm Sat, Mar 22 202511pm Sat, Mar 22 202512am Sun, Mar 23 20251am Sun, Mar 23 20252am Sun, Mar 23 20253am Sun, Mar 23 20254am Sun, Mar 23 20255am Sun, Mar 23 20256am Sun, Mar 23 20257am Sun, Mar 23 20258am Sun, Mar 23 20259am Sun, Mar 23 202510am Sun, Mar 23 202511am Sun, Mar 23 202512pm Sun, Mar 23 20251pm Sun, Mar 23 20252pm Sun, Mar 23 20253pm Sun, Mar 23 20254pm Sun, Mar 23 20255pm Sun, Mar 23 20256pm Sun, Mar 23 20257pm Sun, Mar 23 20258pm Sun, Mar 23 20259pm Sun, Mar 23 202510pm Sun, Mar 23 202511pm Sun, Mar 23 202512am Mon, Mar 24 20251am Mon, Mar 24 20252am Mon, Mar 24 20253am Mon, Mar 24 20254am Mon, Mar 24 20255am Mon, Mar 24 20256am Mon, Mar 24 20257am Mon, Mar 24 20258am Mon, Mar 24 20259am Mon, Mar 24 202510am Mon, Mar 24 202511am Mon, Mar 24 202512pm Mon, Mar 24 20251pm Mon, Mar 24 20252pm Mon, Mar 24 20253pm Mon, Mar 24 20254pm Mon, Mar 24 20255pm Mon, Mar 24 20256pm Mon, Mar 24 20257pm Mon, Mar 24 20258pm Mon, Mar 24 20259pm Mon, Mar 24 202510pm Mon, Mar 24 202511pm Mon, Mar 24 202512am Tue, Mar 25 20251am Tue, Mar 25 20252am Tue, Mar 25 20253am Tue, Mar 25 20254am Tue, Mar 25 20255am Tue, Mar 25 20256am Tue, Mar 25 20257am Tue, Mar 25 20258am Tue, Mar 25 20259am Tue, Mar 25 202510am Tue, Mar 25 202511am Tue, Mar 25 202512pm Tue, Mar 25 20251pm Tue, Mar 25 20252pm Tue, Mar 25 20253pm Tue, Mar 25 20254pm Tue, Mar 25 20255pm Tue, Mar 25 20256pm Tue, Mar 25 20257pm Tue, Mar 25 20258pm Tue, Mar 25 20259pm Tue, Mar 25 202510pm Tue, Mar 25 202511pm Tue, Mar 25 202512am Wed, Mar 26 20251am Wed, Mar 26 20252am Wed, Mar 26 20253am Wed, Mar 26 20254am Wed, Mar 26 20255am Wed, Mar 26 20256am Wed, Mar 26 20257am Wed, Mar 26 20258am Wed, Mar 26 20259am Wed, Mar 26 202510am Wed, Mar 26 2025

Date	03/21	03/22
Hour (PDT)	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22
Temperature (°C)	-4	-5	-5	-6	-6	-6	-6	-6	-6	-7	-6	-5	-4	-4	-4	-3	-3	-3	-2	-3	-3	-3	-3	-2
Dewpoint (°C)	-7	-7	-7	-8	-8	-8	-8	-7	-8	-9	-9	-8	-8	-6	-7	-6	-7	-7	-7	-6	-6	-6	-6	-6
Wind Chill (°C)	-12	-13	-13	-13	-13	-13	-13	-12	-12	-12	-12	-11	-9	-9	-9	-8	-8	-8	-7	-8	-8	-7	-7	-6
Surface Wind (mph)	20	18	18	16	15	14	14	11	10	9	9	9	8	8	8	8	8	9	9	9	9	7	7	7
Wind Dir	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW
Gust	29
Sky Cover (%)	94	92	80	76	80	80	81	71	69	72	66	65	73	73	74	78	82	81	84	84	84	73	73	73
Precipitation Potential (%)	91	87	70	53	37	29	71	52	25	16	13	15	14	18	41	47	51	66	55	55	55	55	55	55
Relative Humidity (%)	83	86	85	86	86	85	86	89	86	82	78	76	75	83	77	78	73	72	72	77	77	78	78	76
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	Ocnl	Ocnl	Lkly	Chc	Chc	Chc	Lkly	Chc	Chc	SChc	--	SChc	--	SChc	Chc	Chc	Chc	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date		03/23
Hour (PDT)	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22
Temperature (°C)	-2	-3	-3	-3	-2	-2	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	0	0	1	1	1	1	1
Dewpoint (°C)	-7	-6	-6	-6	-5	-5	-4	-4	-4	-4	-4	-4	-3	-3	-2	-2	-1	-1	-2	-2	-2	-2	-2	-3
Wind Chill (°C)	-7	-7	-8	-8	-7	-7	-6	-6	-6	-7	-7	-7	-7	-7	-7	-6	-6	-6	-5	-5	-4	-4	-4	-4
Surface Wind (mph)	9	9	9	10	10	10	10	10	10	13	13	13	14	14	14	14	14	14	14	14	14	11	11	11
Wind Dir	SW	SW	SW	WSW	WSW	WSW	SW	SW	SW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SW	SW	SW
Gust
Sky Cover (%)	92	92	92	92	92	92	97	97	97	97	97	97	98	98	98	98	98	98	98	98	98	98	98	98
Precipitation Potential (%)	88	88	88	88	88	88	95	95	95	95	95	95	97	97	97	97	97	97	96	96	96	96	96	96
Relative Humidity (%)	74	75	78	80	80	79	78	77	77	78	80	82	85	89	92	94	93	91	88	86	85	83	80	77
Rain	--	--	--	--	--	--	--	--	--	--	--	--	Ocnl	--	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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