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Point Forecast: Herndon VA  38.97N 77.38W (Elev. 354 ft)	Last Update: 1:30 pm EDT Oct 19, 2019

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Weather Elements Weather/Precipitation Fire 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)

48-Hour Period Starting: 3pm Sat, Oct 19 20194pm Sat, Oct 19 20195pm Sat, Oct 19 20196pm Sat, Oct 19 20197pm Sat, Oct 19 20198pm Sat, Oct 19 20199pm Sat, Oct 19 201910pm Sat, Oct 19 201911pm Sat, Oct 19 201912am Sun, Oct 20 20191am Sun, Oct 20 20192am Sun, Oct 20 20193am Sun, Oct 20 20194am Sun, Oct 20 20195am Sun, Oct 20 20196am Sun, Oct 20 20197am Sun, Oct 20 20198am Sun, Oct 20 20199am Sun, Oct 20 201910am Sun, Oct 20 201911am Sun, Oct 20 201912pm Sun, Oct 20 20191pm Sun, Oct 20 20192pm Sun, Oct 20 20193pm Sun, Oct 20 20194pm Sun, Oct 20 20195pm Sun, Oct 20 20196pm Sun, Oct 20 20197pm Sun, Oct 20 20198pm Sun, Oct 20 20199pm Sun, Oct 20 201910pm Sun, Oct 20 201911pm Sun, Oct 20 201912am Mon, Oct 21 20191am Mon, Oct 21 20192am Mon, Oct 21 20193am Mon, Oct 21 20194am Mon, Oct 21 20195am Mon, Oct 21 20196am Mon, Oct 21 20197am Mon, Oct 21 20198am Mon, Oct 21 20199am Mon, Oct 21 201910am Mon, Oct 21 201911am Mon, Oct 21 201912pm Mon, Oct 21 20191pm Mon, Oct 21 20192pm Mon, Oct 21 20193pm Mon, Oct 21 20194pm Mon, Oct 21 20195pm Mon, Oct 21 20196pm Mon, Oct 21 20197pm Mon, Oct 21 20198pm Mon, Oct 21 20199pm Mon, Oct 21 201910pm Mon, Oct 21 201911pm Mon, Oct 21 201912am Tue, Oct 22 20191am Tue, Oct 22 20192am Tue, Oct 22 20193am Tue, Oct 22 20194am Tue, Oct 22 20195am Tue, Oct 22 20196am Tue, Oct 22 20197am Tue, Oct 22 20198am Tue, Oct 22 20199am Tue, Oct 22 201910am Tue, Oct 22 201911am Tue, Oct 22 201912pm Tue, Oct 22 20191pm Tue, Oct 22 20192pm Tue, Oct 22 20193pm Tue, Oct 22 20194pm Tue, Oct 22 20195pm Tue, Oct 22 20196pm Tue, Oct 22 20197pm Tue, Oct 22 20198pm Tue, Oct 22 20199pm Tue, Oct 22 201910pm Tue, Oct 22 201911pm Tue, Oct 22 201912am Wed, Oct 23 20191am Wed, Oct 23 20192am Wed, Oct 23 20193am Wed, Oct 23 20194am Wed, Oct 23 20195am Wed, Oct 23 20196am Wed, Oct 23 20197am Wed, Oct 23 20198am Wed, Oct 23 20199am Wed, Oct 23 201910am Wed, Oct 23 201911am Wed, Oct 23 201912pm Wed, Oct 23 20191pm Wed, Oct 23 20192pm Wed, Oct 23 20193pm Wed, Oct 23 20194pm Wed, Oct 23 20195pm Wed, Oct 23 20196pm Wed, Oct 23 20197pm Wed, Oct 23 20198pm Wed, Oct 23 20199pm Wed, Oct 23 201910pm Wed, Oct 23 201911pm Wed, Oct 23 201912am Thu, Oct 24 20191am Thu, Oct 24 20192am Thu, Oct 24 2019

Date	10/19									10/20
Hour (EDT)	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14
Temperature (°F)	65	65	64	62	60	59	57	57	56	55	54	54	54	53	53	53	52	52	54	55	56	57	58	58
Dewpoint (°F)	42	42	43	43	44	44	45	45	46	46	47	47	48	48	49	49	50	50	50	51	51	52	53	53
Wind Chill (°F)
Surface Wind (mph)	7	7	7	7	6	6	6	6	6	6	5	5	5	5	3	2	3	5	7	8	9	9	9	9
Wind Dir	S	S	S	S	S	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	E	NE	NE	NE	NE	NE	N	N
Gust
Sky Cover (%)	39	44	49	53	56	59	63	66	70	73	75	82	85	91	94	94	95	95	96	97	98	95	89	86
Precipitation Potential (%)	1	1	1	1	1	7	7	7	12	12	12	54	54	54	75	75	75	84	84	84	72	72	72	40
Relative Humidity (%)	43	43	46	50	55	57	64	64	69	72	77	77	80	83	86	86	93	93	86	86	83	83	83	83
Rain	--	--	--	--	--	--	--	--	--	--	--	Chc	Chc	Chc	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Lkly	Lkly	Lkly	Chc
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date										10/21
Hour (EDT)	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14
Temperature (°F)	58	58	58	56	55	54	53	52	51	51	51	50	50	50	49	49	50	51	54	58	61	63	65	67
Dewpoint (°F)	53	52	52	52	51	51	51	50	50	50	49	49	48	48	47	47	47	47	48	50	51	52	52	52
Wind Chill (°F)												49	49	48	47	48	49
Surface Wind (mph)	9	10	10	9	8	7	6	6	6	5	3	3	3	5	5	3	3	2	2	3	3	2	2	2
Wind Dir	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	NE	E	SE
Gust
Sky Cover (%)	86	87	87	81	70	64	62	58	56	53	47	44	46	49	50	48	43	40	40	40	40	40	41	41
Precipitation Potential (%)	40	40	20	20	20	14	14	14	14	14	14	11	11	11	11	11	11	8	8	8	8	8	8	9
Relative Humidity (%)	83	80	80	86	86	90	93	93	96	96	93	96	93	93	93	93	89	86	80	75	70	67	63	59
Rain	Chc	Chc	SChc	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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