Point Forecast: Chantilly VA  38.88N 77.4W (Elev. 358 ft)	Last Update: 4:30 am EDT May 5, 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: 7am Sun, May 5 20248am Sun, May 5 20249am Sun, May 5 202410am Sun, May 5 202411am Sun, May 5 202412pm Sun, May 5 20241pm Sun, May 5 20242pm Sun, May 5 20243pm Sun, May 5 20244pm Sun, May 5 20245pm Sun, May 5 20246pm Sun, May 5 20247pm Sun, May 5 20248pm Sun, May 5 20249pm Sun, May 5 202410pm Sun, May 5 202411pm Sun, May 5 202412am Mon, May 6 20241am Mon, May 6 20242am Mon, May 6 20243am Mon, May 6 20244am Mon, May 6 20245am Mon, May 6 20246am Mon, May 6 20247am Mon, May 6 20248am Mon, May 6 20249am Mon, May 6 202410am Mon, May 6 202411am Mon, May 6 202412pm Mon, May 6 20241pm Mon, May 6 20242pm Mon, May 6 20243pm Mon, May 6 20244pm Mon, May 6 20245pm Mon, May 6 20246pm Mon, May 6 20247pm Mon, May 6 20248pm Mon, May 6 20249pm Mon, May 6 202410pm Mon, May 6 202411pm Mon, May 6 202412am Tue, May 7 20241am Tue, May 7 20242am Tue, May 7 20243am Tue, May 7 20244am Tue, May 7 20245am Tue, May 7 20246am Tue, May 7 20247am Tue, May 7 20248am Tue, May 7 20249am Tue, May 7 202410am Tue, May 7 202411am Tue, May 7 202412pm Tue, May 7 20241pm Tue, May 7 20242pm Tue, May 7 20243pm Tue, May 7 20244pm Tue, May 7 20245pm Tue, May 7 20246pm Tue, May 7 20247pm Tue, May 7 20248pm Tue, May 7 20249pm Tue, May 7 202410pm Tue, May 7 202411pm Tue, May 7 202412am Wed, May 8 20241am Wed, May 8 20242am Wed, May 8 20243am Wed, May 8 20244am Wed, May 8 20245am Wed, May 8 20246am Wed, May 8 20247am Wed, May 8 20248am Wed, May 8 20249am Wed, May 8 202410am 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 2024

Date	05/05																	05/06
Hour (EDT)	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06
Temperature (°F)	56	56	58	59	61	63	64	65	66	67	68	68	67	65	65	67	66	66	66	65	65	65	64	64
Dewpoint (°F)	55	56	57	58	60	61	62	63	63	63	64	64	64	64	64	63	63	63	64	63	64	63	64	64
Heat Index (°F)
Surface Wind (mph)	7	7	6	6	6	6	7	8	8	9	9	9	8	7	7	7	6	6	6	6	6	5	5	5
Wind Dir	E	SE	SE	SE	S	S	S	S	S	S	S	S	S	SE	SE	SE	S	S	S	S	S	S	S	S
Gust
Sky Cover (%)	100	98	98	98	98	98	97	96	91	87	84	82	83	84	84	87	88	87	86	89	89	91	90	91
Precipitation Potential (%)	98	86	87	91	85	76	65	49	43	35	28	30	26	34	33	36	34	30	23	14	12	11	10	11
Relative Humidity (%)	96	100	96	96	97	93	93	93	90	87	87	87	90	97	97	87	90	90	93	93	97	93	100	100
Rain	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Lkly	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	SChc	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																		05/07
Hour (EDT)	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06
Temperature (°F)	65	66	68	70	72	74	76	77	78	78	78	77	75	73	71	69	67	66	65	65	65	64	64	64
Dewpoint (°F)	64	65	66	65	65	65	65	64	64	63	63	63	63	63	63	63	63	63	63	63	63	62	62	62
Heat Index (°F)							76	77	78	78	78	77	75
Surface Wind (mph)	5	5	5	5	5	5	5	5	5	5	5	5	3	3	5	5	3	3	3	3	2	1	0	1
Wind Dir	SW	SW	SW	W	W	W	W	W	W	SW	SW	S	S	SE	E	NE	W	W	NW	NW	NW	NW	N	NE
Gust
Sky Cover (%)	90	90	91	90	88	83	78	76	79	83	86	86	84	81	79	78	79	79	80	81	83	84	85	85
Precipitation Potential (%)	12	10	10	10	6	6	6	37	37	37	37	37	37	50	50	50	50	50	50	26	26	26	26	26
Relative Humidity (%)	97	97	93	84	79	74	69	64	62	60	60	62	66	71	76	81	87	90	93	93	93	93	93	93
Rain	--	--	--	--	--	--	--	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc
Thunder	--	--	--	--	--	--	--	SChc	SChc	SChc	Chc	Chc	Chc	Chc	Chc	Chc	--	--	--	SChc	SChc	SChc	SChc	SChc

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