Point Forecast: Mount St Helens WA  46.2N 122.18W (Elev. 5997 ft)	Last Update: 11:45 pm PDT Jun 10, 2024

[hide menu]

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 Haines Index Lightning Activity Level Trans. Wind  ktmphkm/hm/s

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

Date	06/11
Hour (PDT)	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Temperature (°F)	48	47	45	45	44	43	44	46	48	48	45	44	44	44	44	45	47	45	45	43	40	38	37	36
Dewpoint (°F)	27	27	27	29	28	28	32	33	33	34	34	34	37	38	38	37	38	36	35	34	32	28	26	23
Heat Index (°F)
Surface Wind (mph)	7	7	7	7	7	8	9	10	11	13	14	15	15	17	17	20	21	22	22	22	21	21	21	14
Wind Dir	W	WSW	WSW	WSW	SW	WSW	SW	WSW	WSW	WSW	WSW	WSW	W	W	W	W	WNW	WNW	WNW	WNW	WNW	WNW	WNW	NW
Gust										18	21	24	24	26	26	29	30	32	32	32	30	30	30	22
Sky Cover (%)	39	25	8	25	15	19	31	35	44	53	70	77	71	74	64	51	28	27	27	27	25	25	25	18
Precipitation Potential (%)	5	5	5	5	5	1	3	3	4	6	9	15	16	9	7	6	4	1	1	1	1	1	1	0
Relative Humidity (%)	43	46	49	54	53	56	62	60	56	58	64	68	77	79	80	74	72	70	68	69	72	68	63	59
Rain	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date	06/12
Hour (PDT)	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Temperature (°F)	35	35	34	33	33	32	34	35	37	39	41	43	44	45	46	46	46	46	45	44	43	41	38	36
Dewpoint (°F)	22	22	21	19	16	14	15	16	17	15	12	8	13	18	22	24	26	27	28	28	28	26	24	21
Heat Index (°F)
Surface Wind (mph)	14	14	11	11	11	11	11	11	11	11	11	14	14	14	18	18	18	21	21	21	21	21	21	14
Wind Dir	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NNW	NNW	NNW	NNW
Gust	22	22										22	22	22	26	26	26	30	30	30	29	29	29	21
Sky Cover (%)	18	18	27	27	27	19	19	19	18	18	18	2	2	2	3	3	3	2	2	2	4	4	4	9
Precipitation Potential (%)	0	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 (%)	59	58	58	54	51	47	46	44	43	36	30	23	28	34	39	42	45	48	50	53	55	55	55	55
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

International System of 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