Point Forecast: Chantilly VA  38.88N 77.4W (Elev. 358 ft)	Last Update: 7:32 am EDT May 8, 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: 10am Wed, May 8 202411am Wed, May 8 202412pm Wed, May 8 20241pm Wed, May 8 20242pm Wed, May 8 20243pm Wed, May 8 20244pm Wed, May 8 20245pm Wed, May 8 20246pm Wed, May 8 20247pm Wed, May 8 20248pm Wed, May 8 20249pm Wed, May 8 202410pm Wed, May 8 202411pm Wed, May 8 202412am Thu, May 9 20241am Thu, May 9 20242am Thu, May 9 20243am Thu, May 9 20244am Thu, May 9 20245am Thu, May 9 20246am Thu, May 9 20247am Thu, May 9 20248am Thu, May 9 20249am Thu, May 9 202410am Thu, May 9 202411am Thu, May 9 202412pm Thu, May 9 20241pm Thu, May 9 20242pm Thu, May 9 20243pm Thu, May 9 20244pm Thu, May 9 20245pm Thu, May 9 20246pm Thu, May 9 20247pm Thu, May 9 20248pm Thu, May 9 20249pm Thu, May 9 202410pm Thu, May 9 202411pm Thu, May 9 202412am Fri, May 10 20241am Fri, May 10 20242am Fri, May 10 20243am Fri, May 10 20244am Fri, May 10 20245am Fri, May 10 20246am Fri, May 10 20247am Fri, May 10 20248am Fri, May 10 20249am Fri, May 10 202410am Fri, May 10 202411am Fri, May 10 202412pm Fri, May 10 20241pm Fri, May 10 20242pm Fri, May 10 20243pm Fri, May 10 20244pm Fri, May 10 20245pm Fri, May 10 20246pm Fri, May 10 20247pm Fri, May 10 20248pm Fri, May 10 20249pm Fri, May 10 202410pm Fri, May 10 202411pm Fri, May 10 202412am Sat, May 11 20241am Sat, May 11 20242am Sat, May 11 20243am Sat, May 11 20244am Sat, May 11 20245am Sat, May 11 20246am Sat, May 11 20247am Sat, May 11 20248am Sat, May 11 20249am Sat, May 11 202410am Sat, May 11 202411am Sat, May 11 202412pm Sat, May 11 20241pm Sat, May 11 20242pm Sat, May 11 20243pm Sat, May 11 20244pm Sat, May 11 20245pm Sat, May 11 20246pm Sat, May 11 20247pm Sat, May 11 20248pm Sat, May 11 20249pm Sat, May 11 202410pm Sat, May 11 202411pm Sat, May 11 202412am Sun, May 12 20241am Sun, May 12 20242am Sun, May 12 20243am Sun, May 12 20244am Sun, May 12 20245am Sun, May 12 20246am Sun, May 12 20247am Sun, May 12 20248am Sun, May 12 20249am Sun, May 12 202410am Sun, May 12 202411am Sun, May 12 202412pm Sun, May 12 20241pm Sun, May 12 20242pm Sun, May 12 20243pm Sun, May 12 20244pm Sun, May 12 20245pm Sun, May 12 20246pm Sun, May 12 20247pm Sun, May 12 20248pm Sun, May 12 20249pm Sun, May 12 2024

Date	05/08														05/09
Hour (EDT)	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09
Temperature (°F)	75	79	81	85	87	88	89	87	87	85	81	78	75	73	71	70	68	67	66	66	66	64	66	66
Dewpoint (°F)	66	65	63	62	61	61	60	59	59	59	60	60	60	59	60	59	59	60	59	59	59	60	60	61
Heat Index (°F)	75	79	82	86	87	88	89	86	86	85	82	78	75
Surface Wind (mph)	8	9	10	11	11	11	11	11	10	8	6	5	5	5	5	5	5	3	3	5	5	5	6	7
Wind Dir	W	W	W	W	W	W	W	NW	W	W	W	W	W	SW	SW	SW	SW	SW	S	S	S	S	S	S
Gust				20	21	21	21	18
Sky Cover (%)	43	39	36	34	46	36	32	41	38	35	37	36	39	45	50	49	54	54	58	63	78	83	90	95
Precipitation Potential (%)	14	12	11	9	16	16	16	11	11	11	9	9	9	29	29	29	42	42	42	55	55	55	69	69
Relative Humidity (%)	74	62	54	46	42	40	38	39	39	41	49	54	60	62	68	68	73	78	78	78	78	87	81	84
Rain	--	--	--	--	SChc	SChc	SChc	--	--	--	--	--	--	Chc	Chc	Chc	Chc	Chc	Chc	Lkly	Lkly	Lkly	Lkly	Lkly
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc
Date															05/10
Hour (EDT)	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09
Temperature (°F)	69	71	72	73	74	74	74	73	71	69	67	66	64	63	62	61	61	60	58	58	58	59	60	61
Dewpoint (°F)	61	61	61	61	61	61	61	61	61	60	60	59	59	58	57	57	56	56	55	55	55	54	54	53
Heat Index (°F)
Surface Wind (mph)	8	9	10	11	11	11	11	10	9	8	8	7	7	7	7	7	7	7	7	7	8	10	11	14
Wind Dir	S	S	SW	SW	SW	SW	W	NW	NW	N	N	N	N	N	NW	W	W	W	W	W	W	NW	NW	NW
Gust																							18	21
Sky Cover (%)	94	92	90	86	84	79	68	63	61	59	57	58	61	62	63	66	67	67	68	68	65	60	58	59
Precipitation Potential (%)	69	69	69	69	87	87	87	87	87	87	40	40	40	40	40	40	14	14	14	14	14	14	26	26
Relative Humidity (%)	76	71	68	66	64	64	64	66	71	73	78	78	84	84	84	87	84	87	90	90	90	83	81	75
Rain	Lkly	Lkly	Lkly	Lkly	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Chc	Chc	Chc	Chc	Chc	Chc	--	--	--	--	--	--	Chc	Chc
Thunder	SChc	SChc	SChc	SChc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	--	--	--	--	--	--	--	--	--	--	--

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