Point Forecast: Herndon VA  38.97N 77.38W (Elev. 354 ft)	Last Update: 4:30 pm EDT May 29, 2024

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Weather Elements Fire Weather Aviation 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 Vent Rate (x1000 mph-ft) Atmospheric Dispersion Index Low Visibility Occurrence Risk Index Ceiling Height Visibility

48-Hour Period Starting: 4pm Wed, May 29 20245pm Wed, May 29 20246pm Wed, May 29 20247pm Wed, May 29 20248pm Wed, May 29 20249pm Wed, May 29 202410pm Wed, May 29 202411pm Wed, May 29 202412am Thu, May 30 20241am Thu, May 30 20242am Thu, May 30 20243am Thu, May 30 20244am Thu, May 30 20245am Thu, May 30 20246am Thu, May 30 20247am Thu, May 30 20248am Thu, May 30 20249am Thu, May 30 202410am Thu, May 30 202411am Thu, May 30 202412pm Thu, May 30 20241pm Thu, May 30 20242pm Thu, May 30 20243pm Thu, May 30 20244pm Thu, May 30 20245pm Thu, May 30 20246pm Thu, May 30 20247pm Thu, May 30 20248pm Thu, May 30 20249pm 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 2024

Date	05/29								05/30
Hour (EDT)	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15
Temperature (°F)	66	71	69	67	65	63	62	59	58	57	57	55	56	55	55	56	59	62	65	67	69	71	72	73
Dewpoint (°F)	53	56	56	57	57	56	56	55	55	54	53	54	53	53	53	53	54	52	51	50	48	48	47	45
Heat Index (°F)
Surface Wind (mph)	5	5	5	5	5	5	5	5	5	6	7	7	7	7	8	9	10	10	11	11	11	11	11	11
Wind Dir	NW	NW	NW	NW	NW	NW	W	W	W	NW	NW	NW	NW	NW	NW	NW	NW	N	N	N	N	NW	NW	NW
Gust																			18	20	20	18	18
Sky Cover (%)	91	82	72	83	82	46	57	49	33	32	25	21	28	31	29	24	18	17	17	16	20	23	27	27
Precipitation Potential (%)	62	38	59	58	25	18	12	8	4	6	8	8	8	5	5	5	3	3	3	3	3	3	11	11
Relative Humidity (%)	63	59	63	70	75	78	81	87	90	90	86	96	90	93	93	90	83	70	60	54	47	44	41	37
Rain	Lkly	Chc	Lkly	Lkly	Chc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	Chc	Chc	Chc	Chc	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date									05/31
Hour (EDT)	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15
Temperature (°F)	73	73	72	71	67	65	61	59	58	57	55	53	52	51	52	53	56	60	64	67	70	71	73	74
Dewpoint (°F)	45	45	45	45	46	47	47	47	46	46	45	44	44	44	44	44	44	44	44	44	43	43	43	43
Heat Index (°F)
Surface Wind (mph)	11	11	10	8	7	7	7	7	6	6	6	6	6	6	6	6	7	7	8	8	9	9	9	9
Wind Dir	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	N	N	N	NW	NW	N	N	N	N	N	N	N
Gust
Sky Cover (%)	27	27	27	28	28	25	21	17	13	9	6	6	6	5	5	6	5	4	5	5	5	5	6	6
Precipitation Potential (%)	11	11	11	11	5	5	5	4	4	4	2	2	2	2	2	2	2	2	2	2	2	2	1	1
Relative Humidity (%)	37	37	38	39	47	52	60	64	64	67	69	71	74	77	74	71	64	55	48	43	38	36	34	33
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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