Point Forecast: Mount St Helens WA  46.18N 122.18W (Elev. 1891 m)	Last Update: 9:41 pm PDT May 30, 2024

[hide menu]

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: 9pm Thu, May 30 202410pm Thu, May 30 202411pm Thu, May 30 202412am Fri, May 31 20241am Fri, May 31 20242am Fri, May 31 20243am Fri, May 31 20244am Fri, May 31 20245am Fri, May 31 20246am Fri, May 31 20247am Fri, May 31 20248am Fri, May 31 20249am Fri, May 31 202410am Fri, May 31 202411am Fri, May 31 202412pm Fri, May 31 20241pm Fri, May 31 20242pm Fri, May 31 20243pm Fri, May 31 20244pm Fri, May 31 20245pm Fri, May 31 20246pm Fri, May 31 20247pm Fri, May 31 20248pm Fri, May 31 20249pm Fri, May 31 202410pm Fri, May 31 202411pm Fri, May 31 202412am Sat, Jun 1 20241am Sat, Jun 1 20242am Sat, Jun 1 20243am Sat, Jun 1 20244am Sat, Jun 1 20245am Sat, Jun 1 20246am Sat, Jun 1 20247am Sat, Jun 1 20248am Sat, Jun 1 20249am Sat, Jun 1 202410am Sat, Jun 1 202411am Sat, Jun 1 202412pm Sat, Jun 1 20241pm Sat, Jun 1 20242pm Sat, Jun 1 20243pm Sat, Jun 1 20244pm Sat, Jun 1 20245pm Sat, Jun 1 20246pm Sat, Jun 1 20247pm Sat, Jun 1 20248pm Sat, Jun 1 20249pm Sat, Jun 1 202410pm Sat, Jun 1 202411pm Sat, Jun 1 202412am Sun, Jun 2 20241am Sun, Jun 2 20242am Sun, Jun 2 20243am Sun, Jun 2 20244am Sun, Jun 2 20245am Sun, Jun 2 20246am Sun, Jun 2 20247am Sun, Jun 2 20248am Sun, Jun 2 20249am Sun, Jun 2 202410am Sun, Jun 2 202411am Sun, Jun 2 202412pm Sun, Jun 2 20241pm Sun, Jun 2 20242pm Sun, Jun 2 20243pm Sun, Jun 2 20244pm Sun, Jun 2 20245pm Sun, Jun 2 20246pm Sun, Jun 2 20247pm Sun, Jun 2 20248pm Sun, Jun 2 20249pm Sun, Jun 2 202410pm Sun, Jun 2 202411pm Sun, Jun 2 202412am Mon, Jun 3 20241am Mon, Jun 3 20242am Mon, Jun 3 20243am Mon, Jun 3 20244am Mon, Jun 3 20245am Mon, Jun 3 20246am Mon, Jun 3 20247am Mon, Jun 3 20248am Mon, Jun 3 20249am Mon, Jun 3 202410am Mon, Jun 3 202411am Mon, Jun 3 202412pm Mon, Jun 3 20241pm Mon, Jun 3 20242pm Mon, Jun 3 20243pm Mon, Jun 3 20244pm Mon, Jun 3 20245pm Mon, Jun 3 20246pm Mon, Jun 3 20247pm Mon, Jun 3 20248pm Mon, Jun 3 20249pm Mon, Jun 3 202410pm Mon, Jun 3 202411pm Mon, Jun 3 202412am Tue, Jun 4 20241am Tue, Jun 4 20242am Tue, Jun 4 20243am Tue, Jun 4 20244am Tue, Jun 4 20245am Tue, Jun 4 20246am Tue, Jun 4 20247am Tue, Jun 4 20248am Tue, Jun 4 2024

Date	05/30			05/31
Hour (PDT)	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20
Temperature (°C)	1	1	1	1	1	1	1	1	0	1	2	3	6	7	7	8	9	9	9	10	10	9	9	8
Dewpoint (°C)	-4	-3	-4	-5	-5	-6	-6	-7	-8	-7	-7	-6	-4	-2	-2	-1	0	0	0	1	1	2	2	1
Heat Index (°C)
Surface Wind (mph)	11	10	10	10	10	10	10	10	10	9	8	7	6	6	5	6	6	7	8	9	10	10	10	10
Wind Dir	NNW	NNW	NNW	NNW	N	N	N	N	N	NNE	NE	NE	ESE	SSE	SSE	SSE	SSW	WSW	WSW	W	WNW	WNW	WNW	NW
Gust
Sky Cover (%)	4	1	1	5	10	7	4	5	5	11	12	5	2	6	7	9	19	13	8	16	39	39	39	46
Precipitation Potential (%)	1	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1	2	2	2	0	0	0	0
Relative Humidity (%)	70	71	68	67	63	62	62	58	54	57	53	49	48	52	51	52	53	52	52	53	55	61	61	62
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date				06/01
Hour (PDT)	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20
Temperature (°C)	6	6	5	5	5	5	4	4	4	4	5	5	6	6	6	6	6	6	6	6	6	5	5	4
Dewpoint (°C)	-1	-1	-2	-2	-3	-3	-3	-3	-3	-3	-2	-2	-1	-1	0	1	2	2	2	3	3	3	2	2
Heat Index (°C)
Surface Wind (mph)	10	10	7	7	7	6	6	6	5	5	5	7	7	7	10	10	10	13	13	13	13	13	13	10
Wind Dir	NW	NW	NW	NW	NW	WNW	WNW	WNW	W	W	W	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	W	W	W	W
Gust
Sky Cover (%)	46	46	56	56	56	72	72	72	70	70	70	63	63	63	65	65	65	77	77	77	63	63	63	66
Precipitation Potential (%)	0	0	1	1	1	1	1	1	14	14	14	14	14	14	24	24	24	24	24	24	41	41	41	41
Relative Humidity (%)	62	62	61	60	58	57	57	58	59	59	59	60	62	65	68	71	74	77	80	82	84	84	83	82
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	Chc	Chc	Chc	Chc
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

English Units Forecast Discussion 7-Day Forecast Hourly Weather Graph PFM (Forecast Matrix) PFM Decoding Guide Current River Levels Weather Planner Mapped Observations Road Conditions Marine Weather Fire Weather User Defined Area Forecast