Point Forecast: 15 Miles ENE Mount St Helens WA  46.3N 121.93W (Elev. 3976 ft)	Last Update: 12:41 pm PDT May 20, 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: 1pm Mon, May 20 20242pm Mon, May 20 20243pm Mon, May 20 20244pm Mon, May 20 20245pm Mon, May 20 20246pm Mon, May 20 20247pm Mon, May 20 20248pm Mon, May 20 20249pm Mon, May 20 202410pm Mon, May 20 202411pm Mon, May 20 202412am Tue, May 21 20241am Tue, May 21 20242am Tue, May 21 20243am Tue, May 21 20244am Tue, May 21 20245am Tue, May 21 20246am Tue, May 21 20247am Tue, May 21 20248am Tue, May 21 20249am Tue, May 21 202410am Tue, May 21 202411am Tue, May 21 202412pm Tue, May 21 20241pm Tue, May 21 20242pm Tue, May 21 20243pm Tue, May 21 20244pm Tue, May 21 20245pm Tue, May 21 20246pm Tue, May 21 20247pm Tue, May 21 20248pm Tue, May 21 20249pm Tue, May 21 202410pm Tue, May 21 202411pm Tue, May 21 202412am Wed, May 22 20241am Wed, May 22 20242am Wed, May 22 20243am Wed, May 22 20244am Wed, May 22 20245am Wed, May 22 20246am Wed, May 22 20247am Wed, May 22 20248am Wed, May 22 20249am Wed, May 22 202410am Wed, May 22 202411am Wed, May 22 202412pm Wed, May 22 20241pm Wed, May 22 20242pm Wed, May 22 20243pm Wed, May 22 20244pm Wed, May 22 20245pm Wed, May 22 20246pm Wed, May 22 20247pm Wed, May 22 20248pm Wed, May 22 20249pm Wed, May 22 202410pm Wed, May 22 202411pm Wed, May 22 202412am Thu, May 23 20241am Thu, May 23 20242am Thu, May 23 20243am Thu, May 23 20244am Thu, May 23 20245am Thu, May 23 20246am Thu, May 23 20247am Thu, May 23 20248am Thu, May 23 20249am Thu, May 23 202410am Thu, May 23 202411am Thu, May 23 202412pm Thu, May 23 20241pm Thu, May 23 20242pm Thu, May 23 20243pm Thu, May 23 20244pm Thu, May 23 20245pm Thu, May 23 20246pm Thu, May 23 20247pm Thu, May 23 20248pm Thu, May 23 20249pm Thu, May 23 202410pm Thu, May 23 202411pm Thu, May 23 202412am Fri, May 24 20241am Fri, May 24 20242am Fri, May 24 20243am Fri, May 24 20244am Fri, May 24 20245am Fri, May 24 20246am Fri, May 24 20247am Fri, May 24 20248am Fri, May 24 20249am Fri, May 24 202410am Fri, May 24 202411am Fri, May 24 202412pm Fri, May 24 20241pm Fri, May 24 20242pm Fri, May 24 20243pm Fri, May 24 20244pm Fri, May 24 20245pm Fri, May 24 20246pm Fri, May 24 20247pm Fri, May 24 20248pm Fri, May 24 20249pm Fri, May 24 202410pm Fri, May 24 202411pm Fri, May 24 202412am Sat, May 25 2024

Date	05/20											05/21
Hour (PDT)	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12
Temperature (°F)	47	49	49	49	50	48	47	45	42	40	39	37	37	36	36	37	37	36	37	39	40	40	41	41
Dewpoint (°F)	35	37	36	37	38	36	37	38	36	36	35	33	33	33	32	32	31	30	31	33	35	36	37	39
Heat Index (°F)
Surface Wind (mph)	10	10	10	11	11	10	10	9	8	7	6	6	5	5	5	3	3	3	3	5	5	5	6	6
Wind Dir	NNW	NNW	NNW	NW	NW	NW	NW	NW	NW	NW	NNW	NNW	NNW	NNW	WNW	W	W	W	W	WSW	WSW	WSW	SW	SW
Gust	18	20	20	21	22	21	21	18
Sky Cover (%)	30	28	24	26	27	27	28	38	47	46	44	35	34	31	45	53	54	69	72	87	92	100	100	100
Precipitation Potential (%)	0	0	0	0	2	2	2	2	2	2	2	3	4	4	4	5	5	8	13	22	36	66	72	89
Relative Humidity (%)	64	62	61	62	63	63	68	75	78	84	86	87	86	87	85	82	79	81	79	78	81	85	88	92
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	Chc	Lkly	Lkly	Ocnl
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date												05/22
Hour (PDT)	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12
Temperature (°F)	41	40	40	41	40	40	40	40	40	39	39	39	38	38	37	36	35	35	35	35	36	36	37	38
Dewpoint (°F)	39	39	39	39	40	40	40	39	39	39	38	37	36	36	34	33	32	31	31	30	31	33	34	35
Heat Index (°F)
Surface Wind (mph)	6	6	6	6	6	6	6	6	6	6	7	7	7	10	10	10	10	10	10	10	10	10	11	11
Wind Dir	SW	SSW	SSW	SSW	SW	SW	SW	WSW	WSW	WSW	WSW	WSW	WSW	W	W	W	W	W	W	W	W	W	W	W
Gust														20	20	20	22	22	22	22	22	22	24	24
Sky Cover (%)	100	100	100	100	100	100	100	100	100	100	88	88	88	88	88	88	90	90	90	90	90	90	80	80
Precipitation Potential (%)	96	95	96	95	98	98	98	98	98	98	82	82	82	82	82	82	84	84	84	84	84	84	69	69
Relative Humidity (%)	95	97	96	95	100	98	99	97	98	98	96	94	93	91	90	89	88	86	85	84	85	87	88	88
Rain	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	--	--	--	--	--	--	Lkly	Lkly
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