Point Forecast: Mount St Helens WA  46.21N 122.15W (Elev. 5259 ft)	Last Update: 7:41 am PDT Jun 18, 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: 8am Tue, Jun 18 20249am Tue, Jun 18 202410am Tue, Jun 18 202411am Tue, Jun 18 202412pm Tue, Jun 18 20241pm Tue, Jun 18 20242pm Tue, Jun 18 20243pm Tue, Jun 18 20244pm Tue, Jun 18 20245pm Tue, Jun 18 20246pm Tue, Jun 18 20247pm Tue, Jun 18 20248pm Tue, Jun 18 20249pm Tue, Jun 18 202410pm Tue, Jun 18 202411pm Tue, Jun 18 202412am Wed, Jun 19 20241am Wed, Jun 19 20242am Wed, Jun 19 20243am Wed, Jun 19 20244am Wed, Jun 19 20245am Wed, Jun 19 20246am Wed, Jun 19 20247am Wed, Jun 19 20248am Wed, Jun 19 20249am Wed, Jun 19 202410am Wed, Jun 19 202411am Wed, Jun 19 202412pm Wed, Jun 19 20241pm Wed, Jun 19 20242pm Wed, Jun 19 20243pm Wed, Jun 19 20244pm Wed, Jun 19 20245pm Wed, Jun 19 20246pm Wed, Jun 19 20247pm Wed, Jun 19 20248pm Wed, Jun 19 20249pm Wed, Jun 19 202410pm Wed, Jun 19 202411pm Wed, Jun 19 202412am Thu, Jun 20 20241am Thu, Jun 20 20242am Thu, Jun 20 20243am Thu, Jun 20 20244am Thu, Jun 20 20245am Thu, Jun 20 20246am Thu, Jun 20 20247am Thu, Jun 20 20248am Thu, Jun 20 20249am Thu, Jun 20 202410am Thu, Jun 20 202411am Thu, Jun 20 202412pm Thu, Jun 20 20241pm Thu, Jun 20 20242pm Thu, Jun 20 20243pm Thu, Jun 20 20244pm Thu, Jun 20 20245pm Thu, Jun 20 20246pm Thu, Jun 20 20247pm Thu, Jun 20 20248pm Thu, Jun 20 20249pm Thu, Jun 20 202410pm Thu, Jun 20 202411pm Thu, Jun 20 202412am Fri, Jun 21 20241am Fri, Jun 21 20242am Fri, Jun 21 20243am Fri, Jun 21 20244am Fri, Jun 21 20245am Fri, Jun 21 20246am Fri, Jun 21 20247am Fri, Jun 21 20248am Fri, Jun 21 20249am Fri, Jun 21 202410am Fri, Jun 21 202411am Fri, Jun 21 202412pm Fri, Jun 21 20241pm Fri, Jun 21 20242pm Fri, Jun 21 20243pm Fri, Jun 21 20244pm Fri, Jun 21 20245pm Fri, Jun 21 20246pm Fri, Jun 21 20247pm Fri, Jun 21 20248pm Fri, Jun 21 20249pm Fri, Jun 21 202410pm Fri, Jun 21 202411pm Fri, Jun 21 202412am Sat, Jun 22 20241am Sat, Jun 22 20242am Sat, Jun 22 20243am Sat, Jun 22 20244am Sat, Jun 22 20245am Sat, Jun 22 20246am Sat, Jun 22 20247am Sat, Jun 22 20248am Sat, Jun 22 20249am Sat, Jun 22 202410am Sat, Jun 22 202411am Sat, Jun 22 202412pm Sat, Jun 22 20241pm Sat, Jun 22 20242pm Sat, Jun 22 20243pm Sat, Jun 22 20244pm Sat, Jun 22 20245pm Sat, Jun 22 20246pm Sat, Jun 22 20247pm Sat, Jun 22 2024

Date	06/18																06/19
Hour (PDT)	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07
Temperature (°F)	38	39	40	42	44	46	48	49	50	50	49	49	47	46	45	45	45	45	45	43	42	42	44	47
Dewpoint (°F)	34	35	35	36	37	38	39	39	40	40	39	39	38	37	35	35	34	33	32	30	29	28	29	31
Heat Index (°F)
Surface Wind (mph)	5	3	3	5	5	6	7	8	8	9	10	10	9	8	8	8	8	9	9	9	10	10	10	10
Wind Dir	N	NNE	NNE	N	NNW	NNW	NNW	NW	NW	NW	WNW	WNW	NW	NW	NW	N	NNW	NNW	SSE	S	S	S	S	S
Gust
Sky Cover (%)	44	30	26	20	14	14	10	15	10	12	11	11	23	18	1	1	1	0	1	0	0	1	1	1
Precipitation Potential (%)	7	7	7	4	4	4	4	4	4	1	1	1	1	1	1	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	86	85	83	80	76	73	71	69	68	68	69	69	70	70	69	68	65	63	61	59	59	58	56	54
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																	06/20
Hour (PDT)	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07
Temperature (°F)	49	52	53	55	57	59	60	61	61	61	62	62	61	59	56	53	53	54	53	52	50	49	50	53
Dewpoint (°F)	32	32	32	32	33	34	34	35	34	35	37	40	42	41	39	36	35	36	34	31	28	26	27	30
Heat Index (°F)
Surface Wind (mph)	7	7	7	6	6	6	6	6	6	6	6	6	6	6	6	10	10	10	10	10	10	10	10	10
Wind Dir	ESE	ESE	ESE	SSE	SSE	SSE	S	S	S	WSW	WSW	WSW	NW	NW	NW	NNE	NNE	NNE	ENE	ENE	ENE	ENE	ENE	ENE
Gust
Sky Cover (%)	1	1	1	2	2	2	7	7	7	5	5	5	8	8	8	9	9	9	3	3	3	4	4	4
Precipitation Potential (%)	0	0	0	3	3	3	3	3	3	3	3	3	3	3	3	1	1	1	1	1	1	1	1	1
Relative Humidity (%)	51	47	44	42	40	39	38	37	36	37	40	44	49	51	52	52	51	50	48	45	42	41	41	41
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