Point Forecast: Mc Lean VA  38.95N 77.19W (Elev. 253 ft)	Last Update: 6:30 am EST Dec 14, 2024

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Weather Elements Fire Weather Aviation Weather Temperature (°F) Dewpoint (°F) Wind Chill (°F) Surface Wind  ktmphkm/hm/s Sky Cover (%) Precipitation Potential (%) Relative Humidity (%) Rain Thunder Snow Freezing Rain Sleet 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: 9am Sat, Dec 14 202410am Sat, Dec 14 202411am Sat, Dec 14 202412pm Sat, Dec 14 20241pm Sat, Dec 14 20242pm Sat, Dec 14 20243pm Sat, Dec 14 20244pm Sat, Dec 14 20245pm Sat, Dec 14 20246pm Sat, Dec 14 20247pm Sat, Dec 14 20248pm Sat, Dec 14 20249pm Sat, Dec 14 202410pm Sat, Dec 14 202411pm Sat, Dec 14 202412am Sun, Dec 15 20241am Sun, Dec 15 20242am Sun, Dec 15 20243am Sun, Dec 15 20244am Sun, Dec 15 20245am Sun, Dec 15 20246am Sun, Dec 15 20247am Sun, Dec 15 20248am Sun, Dec 15 20249am Sun, Dec 15 202410am Sun, Dec 15 202411am Sun, Dec 15 202412pm Sun, Dec 15 20241pm Sun, Dec 15 20242pm Sun, Dec 15 20243pm Sun, Dec 15 20244pm Sun, Dec 15 20245pm Sun, Dec 15 20246pm Sun, Dec 15 20247pm Sun, Dec 15 20248pm Sun, Dec 15 20249pm Sun, Dec 15 202410pm Sun, Dec 15 202411pm Sun, Dec 15 202412am Mon, Dec 16 20241am Mon, Dec 16 20242am Mon, Dec 16 20243am Mon, Dec 16 20244am Mon, Dec 16 20245am Mon, Dec 16 20246am Mon, Dec 16 20247am Mon, Dec 16 20248am Mon, Dec 16 20249am Mon, Dec 16 202410am Mon, Dec 16 202411am Mon, Dec 16 202412pm Mon, Dec 16 20241pm Mon, Dec 16 20242pm Mon, Dec 16 20243pm Mon, Dec 16 20244pm Mon, Dec 16 20245pm Mon, Dec 16 20246pm Mon, Dec 16 20247pm Mon, Dec 16 20248pm Mon, Dec 16 20249pm Mon, Dec 16 202410pm Mon, Dec 16 202411pm Mon, Dec 16 202412am Tue, Dec 17 20241am Tue, Dec 17 20242am Tue, Dec 17 20243am Tue, Dec 17 20244am Tue, Dec 17 20245am Tue, Dec 17 20246am Tue, Dec 17 20247am Tue, Dec 17 20248am Tue, Dec 17 20249am Tue, Dec 17 202410am Tue, Dec 17 202411am Tue, Dec 17 202412pm Tue, Dec 17 20241pm Tue, Dec 17 20242pm Tue, Dec 17 20243pm Tue, Dec 17 20244pm Tue, Dec 17 20245pm Tue, Dec 17 20246pm Tue, Dec 17 20247pm Tue, Dec 17 20248pm Tue, Dec 17 20249pm Tue, Dec 17 202410pm Tue, Dec 17 202411pm Tue, Dec 17 202412am Wed, Dec 18 20241am Wed, Dec 18 20242am Wed, Dec 18 20243am Wed, Dec 18 20244am Wed, Dec 18 20245am Wed, Dec 18 20246am Wed, Dec 18 20247am Wed, Dec 18 20248am Wed, Dec 18 20249am Wed, Dec 18 202410am Wed, Dec 18 202411am Wed, Dec 18 202412pm Wed, Dec 18 20241pm Wed, Dec 18 20242pm Wed, Dec 18 20243pm Wed, Dec 18 20244pm Wed, Dec 18 20245pm Wed, Dec 18 20246pm Wed, Dec 18 20247pm Wed, Dec 18 20248pm Wed, Dec 18 2024

Date	12/14															12/15
Hour (EST)	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08
Temperature (°F)	30	32	34	36	37	38	39	40	38	36	35	33	32	31	31	31	30	31	30	30	29	29	29	31
Dewpoint (°F)	16	16	16	17	17	17	18	19	20	20	20	21	23	24	24	25	25	25	25	26	25	25	26	27
Wind Chill (°F)	25	26	29	31	32	34	35	36	34	33	32	30	29	28	28	26	25	26	25	25	24	24	25	26
Surface Wind (mph)	5	6	6	6	6	6	6	6	5	3	3	3	3	3	3	5	5	5	5	5	5	5	3	5
Wind Dir	NE	NE	E	E	E	E	E	E	E	E	NE	E	E	E	E	E	E	E	E	E	E	E	E	E
Gust
Sky Cover (%)	28	25	25	24	24	31	38	45	46	48	49	49	50	51	55	58	62	69	76	83	81	79	77	83
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	2	2	2	5	5
Relative Humidity (%)	55	51	47	45	44	42	42	42	48	52	54	61	69	75	75	78	81	78	81	85	85	85	88	85
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																12/16
Hour (EST)	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08
Temperature (°F)	33	35	37	39	40	41	41	41	40	40	40	40	40	40	40	41	41	41	42	42	41	41	41	42
Dewpoint (°F)	27	28	29	30	31	32	33	34	34	35	35	36	36	37	37	37	38	38	39	39	39	39	39	40
Wind Chill (°F)	29	31	32	35	36	37	37	37	36	36	36	36	36	36	37	39	39	41	42	42	41	41	41	42
Surface Wind (mph)	5	5	6	6	6	6	6	6	6	6	6	6	6	6	5	3	3	2	2	2	2	2	2	2
Wind Dir	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E
Gust
Sky Cover (%)	88	93	95	96	97	97	97	97	97	96	96	96	97	97	97	97	97	97	97	98	97	96	96	95
Precipitation Potential (%)	5	12	12	12	18	18	18	49	49	49	82	82	82	82	82	82	95	95	95	79	79	79	55	55
Relative Humidity (%)	78	75	72	70	70	70	73	76	79	82	82	85	85	89	89	85	89	89	89	89	92	92	92	93
Rain	--	--	--	--	SChc	SChc	SChc	Chc	Chc	Chc	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Lkly	Lkly
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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