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Point Forecast: Ashburn VA  39.05N 77.49W (Elev. 299 ft)	Last Update: 8:15 am EDT Apr 19, 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 Fri, Apr 19 202410am Fri, Apr 19 202411am Fri, Apr 19 202412pm Fri, Apr 19 20241pm Fri, Apr 19 20242pm Fri, Apr 19 20243pm Fri, Apr 19 20244pm Fri, Apr 19 20245pm Fri, Apr 19 20246pm Fri, Apr 19 20247pm Fri, Apr 19 20248pm Fri, Apr 19 20249pm Fri, Apr 19 202410pm Fri, Apr 19 202411pm Fri, Apr 19 202412am Sat, Apr 20 20241am Sat, Apr 20 20242am Sat, Apr 20 20243am Sat, Apr 20 20244am Sat, Apr 20 20245am Sat, Apr 20 20246am Sat, Apr 20 20247am Sat, Apr 20 20248am Sat, Apr 20 20249am Sat, Apr 20 202410am Sat, Apr 20 202411am Sat, Apr 20 202412pm Sat, Apr 20 20241pm Sat, Apr 20 20242pm Sat, Apr 20 20243pm Sat, Apr 20 20244pm Sat, Apr 20 20245pm Sat, Apr 20 20246pm Sat, Apr 20 20247pm Sat, Apr 20 20248pm Sat, Apr 20 20249pm Sat, Apr 20 202410pm Sat, Apr 20 202411pm Sat, Apr 20 202412am Sun, Apr 21 20241am Sun, Apr 21 20242am Sun, Apr 21 20243am Sun, Apr 21 20244am Sun, Apr 21 20245am Sun, Apr 21 20246am Sun, Apr 21 20247am Sun, Apr 21 20248am Sun, Apr 21 20249am Sun, Apr 21 202410am Sun, Apr 21 202411am Sun, Apr 21 202412pm Sun, Apr 21 20241pm Sun, Apr 21 20242pm Sun, Apr 21 20243pm Sun, Apr 21 20244pm Sun, Apr 21 20245pm Sun, Apr 21 20246pm Sun, Apr 21 20247pm Sun, Apr 21 20248pm Sun, Apr 21 20249pm Sun, Apr 21 202410pm Sun, Apr 21 202411pm Sun, Apr 21 202412am Mon, Apr 22 20241am Mon, Apr 22 20242am Mon, Apr 22 20243am Mon, Apr 22 20244am Mon, Apr 22 20245am Mon, Apr 22 20246am Mon, Apr 22 20247am Mon, Apr 22 20248am Mon, Apr 22 20249am Mon, Apr 22 202410am Mon, Apr 22 202411am Mon, Apr 22 202412pm Mon, Apr 22 20241pm Mon, Apr 22 20242pm Mon, Apr 22 20243pm Mon, Apr 22 20244pm Mon, Apr 22 20245pm Mon, Apr 22 20246pm Mon, Apr 22 20247pm Mon, Apr 22 20248pm Mon, Apr 22 20249pm Mon, Apr 22 202410pm Mon, Apr 22 202411pm Mon, Apr 22 202412am Tue, Apr 23 20241am Tue, Apr 23 20242am Tue, Apr 23 20243am Tue, Apr 23 20244am Tue, Apr 23 20245am Tue, Apr 23 20246am Tue, Apr 23 20247am Tue, Apr 23 20248am Tue, Apr 23 20249am Tue, Apr 23 202410am Tue, Apr 23 202411am Tue, Apr 23 202412pm Tue, Apr 23 20241pm Tue, Apr 23 20242pm Tue, Apr 23 20243pm Tue, Apr 23 20244pm Tue, Apr 23 20245pm Tue, Apr 23 20246pm Tue, Apr 23 20247pm Tue, Apr 23 20248pm Tue, Apr 23 2024

Date	04/19															04/20
Hour (EDT)	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)	54	55	57	59	60	60	62	63	63	63	62	61	58	57	56	57	56	55	54	53	51	52	51	51
Dewpoint (°F)	48	48	47	48	48	49	50	51	51	51	51	51	52	52	52	52	52	52	50	48	47	44	43	41
Wind Chill (°F)
Surface Wind (mph)	8	8	9	9	9	9	9	10	9	8	8	7	6	6	5	5	5	5	6	7	9	8	8	9
Wind Dir	SE	SE	SE	SE	S	S	S	S	SE	S	S	SE	S	S	S	S	NW	NW	NW	NW	N	NW	NW	NW
Gust
Sky Cover (%)	95	95	95	96	91	91	91	88	84	89	76	81	77	85	83	91	85	80	78	71	71	65	63	50
Precipitation Potential (%)	10	10	10	5	7	20	24	28	25	24	18	19	30	33	35	37	28	18	14	10	6	6	5	2
Relative Humidity (%)	80	77	69	67	64	67	65	65	65	65	67	70	80	83	86	83	86	90	86	83	86	74	74	68
Rain	Chc	Chc	Chc	--	--	SChc	SChc	Chc	Chc	SChc	SChc	SChc	Chc	Chc	Chc	Chc	Chc	SChc	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date																04/21
Hour (EDT)	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)	53	57	60	62	64	66	68	68	67	65	62	59	57	54	52	49	47	45	43	42	42	42	43	44
Dewpoint (°F)	39	37	36	36	36	36	36	36	36	35	35	34	34	33	33	32	32	31	30	30	30	31	31	31
Wind Chill (°F)																45	43	41	40	39	40	40	41	41
Surface Wind (mph)	10	11	13	13	14	15	15	15	15	14	11	10	9	9	9	9	8	7	5	5	3	3	3	5
Wind Dir	NW	NW	NW	NW	NW	W	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW
Gust			20	21	22	23	24	24	24	22	18
Sky Cover (%)	41	32	23	23	23	23	27	31	36	30	25	19	25	31	37	38	40	42	41	40	39	41	42	44
Precipitation Potential (%)	2	2	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	2	2	2	2	2	2	4
Relative Humidity (%)	59	47	41	38	35	33	31	31	32	33	36	39	42	45	48	52	56	58	60	62	62	65	62	60
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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