Point Forecast: Chantilly VA  38.88N 77.4W (Elev. 109 m)	Last Update: 4:31 am EDT May 7, 2024

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Weather Elements Fire Weather Aviation Weather Temperature (°C) Dewpoint (°C) Heat Index (°C) 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-m) Atmospheric Dispersion Index Low Visibility Occurrence Risk Index Ceiling Height Visibility

48-Hour Period Starting: 4am 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 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 2024

Date	05/07																				05/08
Hour (EDT)	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03
Temperature (°C)	18	17	18	17	18	19	21	22	23	24	25	26	26	26	26	25	24	22	22	21	20	19	19	19
Dewpoint (°C)	18	17	17	17	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18
Heat Index (°C)										24	25	26	26	26	26	25	24
Surface Wind (mph)	2	2	2	1	2	3	3	3	3	3	3	3	5	5	5	5	6	6	6	6	6	6	6	5
Wind Dir	SW	SW	E	NE	NW	NE	E	E	E	E	E	S	S	S	SE	SE	SE	SE	SE	SE	S	S	S	S
Gust
Sky Cover (%)	94	91	86	85	84	84	74	78	73	72	70	69	69	64	65	64	58	64	61	67	70	73	74	77
Precipitation Potential (%)	27	26	26	26	25	25	25	28	28	28	42	42	42	49	49	49	31	31	31	33	33	33	39	39
Relative Humidity (%)	100	100	97	100	97	93	81	81	71	71	64	62	62	60	62	64	69	76	81	87	90	90	90	93
Rain	Chc	Chc	Chc	Chc	Chc	Chc	Chc	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	Chc	Chc	Chc	SChc	SChc	SChc	--	--
Date																					05/09
Hour (EDT)	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03
Temperature (°C)	19	19	18	18	19	21	23	26	27	28	29	29	30	29	29	27	26	24	22	21	19	19	18	18
Dewpoint (°C)	18	18	18	18	18	17	17	17	17	15	14	14	14	14	14	14	15	15	15	15	15	15	15	15
Heat Index (°C)								26	28	28	29	29	29	29	29	27	26	24
Surface Wind (mph)	5	5	5	6	6	6	7	8	9	10	10	10	10	10	9	8	6	6	5	5	5	5	5	5
Wind Dir	S	S	S	S	SW	SW	SW	W	W	W	W	W	W	W	W	W	W	W	SW	SW	SW	S	S	S
Gust
Sky Cover (%)	79	81	79	71	65	59	48	41	37	37	36	32	27	23	21	21	25	30	38	46	54	61	68	73
Precipitation Potential (%)	39	39	39	39	7	7	7	7	7	7	22	22	22	22	22	22	23	23	23	23	23	23	51	51
Relative Humidity (%)	93	93	97	97	90	78	69	58	53	44	41	39	37	39	41	46	52	58	64	68	75	78	81	84
Rain	Chc	Chc	Chc	Chc	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	Chc	Chc
Thunder	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc

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