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Point Forecast: Washington-Dulles International Airport VA  38.95N 77.44W (Elev. 285 ft)	Last Update: 7:32 pm EDT Sep 15, 2019

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Weather Elements Weather/Precipitation Fire 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)

48-Hour Period Starting: 8pm Sun, Sep 15 20199pm Sun, Sep 15 201910pm Sun, Sep 15 201911pm Sun, Sep 15 201912am Mon, Sep 16 20191am Mon, Sep 16 20192am Mon, Sep 16 20193am Mon, Sep 16 20194am Mon, Sep 16 20195am Mon, Sep 16 20196am Mon, Sep 16 20197am Mon, Sep 16 20198am Mon, Sep 16 20199am Mon, Sep 16 201910am Mon, Sep 16 201911am Mon, Sep 16 201912pm Mon, Sep 16 20191pm Mon, Sep 16 20192pm Mon, Sep 16 20193pm Mon, Sep 16 20194pm Mon, Sep 16 20195pm Mon, Sep 16 20196pm Mon, Sep 16 20197pm Mon, Sep 16 20198pm Mon, Sep 16 20199pm Mon, Sep 16 201910pm Mon, Sep 16 201911pm Mon, Sep 16 201912am Tue, Sep 17 20191am Tue, Sep 17 20192am Tue, Sep 17 20193am Tue, Sep 17 20194am Tue, Sep 17 20195am Tue, Sep 17 20196am Tue, Sep 17 20197am Tue, Sep 17 20198am Tue, Sep 17 20199am Tue, Sep 17 201910am Tue, Sep 17 201911am Tue, Sep 17 201912pm Tue, Sep 17 20191pm Tue, Sep 17 20192pm Tue, Sep 17 20193pm Tue, Sep 17 20194pm Tue, Sep 17 20195pm Tue, Sep 17 20196pm Tue, Sep 17 20197pm Tue, Sep 17 20198pm Tue, Sep 17 20199pm Tue, Sep 17 201910pm Tue, Sep 17 201911pm Tue, Sep 17 201912am Wed, Sep 18 20191am Wed, Sep 18 20192am Wed, Sep 18 20193am Wed, Sep 18 20194am Wed, Sep 18 20195am Wed, Sep 18 20196am Wed, Sep 18 20197am Wed, Sep 18 20198am Wed, Sep 18 20199am Wed, Sep 18 201910am Wed, Sep 18 201911am Wed, Sep 18 201912pm Wed, Sep 18 20191pm Wed, Sep 18 20192pm Wed, Sep 18 20193pm Wed, Sep 18 20194pm Wed, Sep 18 20195pm Wed, Sep 18 20196pm Wed, Sep 18 20197pm Wed, Sep 18 20198pm Wed, Sep 18 20199pm Wed, Sep 18 201910pm Wed, Sep 18 201911pm Wed, Sep 18 201912am Thu, Sep 19 20191am Thu, Sep 19 20192am Thu, Sep 19 20193am Thu, Sep 19 20194am Thu, Sep 19 20195am Thu, Sep 19 20196am Thu, Sep 19 20197am Thu, Sep 19 20198am Thu, Sep 19 20199am Thu, Sep 19 201910am Thu, Sep 19 201911am Thu, Sep 19 201912pm Thu, Sep 19 20191pm Thu, Sep 19 20192pm Thu, Sep 19 20193pm Thu, Sep 19 20194pm Thu, Sep 19 20195pm Thu, Sep 19 20196pm Thu, Sep 19 20197pm Thu, Sep 19 20198pm Thu, Sep 19 20199pm Thu, Sep 19 201910pm Thu, Sep 19 201911pm Thu, Sep 19 201912am Fri, Sep 20 20191am Fri, Sep 20 20192am Fri, Sep 20 20193am Fri, Sep 20 20194am Fri, Sep 20 20195am Fri, Sep 20 20196am Fri, Sep 20 20197am Fri, Sep 20 2019

Date	09/15				09/16
Hour (EDT)	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19
Temperature (°F)	76	72	70	69	68	67	66	65	64	62	61	62	67	71	75	79	82	84	86	87	88	86	84	80
Dewpoint (°F)	57	59	60	60	60	61	61	60	60	59	59	60	61	62	64	64	63	62	61	61	61	62	63	64
Heat Index (°F)	76														75	79	83	85	86	87	88	86	85	82
Surface Wind (mph)	2	3	2	3	2	2	2	2	1	2	2	2	2	2	2	3	5	5	6	6	6	6	5	3
Wind Dir	NE	E	E	S	S	SW	SW	SW	SW	W	S	SE	SW	W	W	SW	SW	SW	SW	SW	SW	SW	SW	SE
Gust
Sky Cover (%)	7	10	13	16	17	17	15	15	16	15	15	17	16	22	29	35	35	34	34	38	45	48	48	47
Precipitation Potential (%)	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	4	4	4	5	5	5	6	6	6
Relative Humidity (%)	52	64	71	73	76	81	84	84	87	90	93	93	81	73	69	60	53	48	43	42	40	45	49	58
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Fog	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date					09/17
Hour (EDT)	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19
Temperature (°F)	77	75	74	72	71	71	70	69	68	66	65	67	67	70	72	74	75	76	77	77	78	76	74	71
Dewpoint (°F)	65	66	66	66	65	65	64	64	64	64	63	63	62	62	62	62	61	60	59	59	60	60	59	59
Heat Index (°F)	77	75															75	76	77	77	78	76
Surface Wind (mph)	6	6	5	5	5	5	5	6	7	8	8	7	7	8	8	9	8	8	7	7	8	8	7	6
Wind Dir	E	E	NE	NE	NE	NE	NE	NE	N	N	N	N	NE	NE	NE	NE	NE	NE	NE	NE	NE	NE	NE	NE
Gust
Sky Cover (%)	47	50	57	60	57	52	49	53	62	66	63	56	52	55	60	63	59	50	45	47	51	53	48	38
Precipitation Potential (%)	10	10	10	10	10	10	8	8	8	8	8	8	2	2	2	2	2	2	2	2	2	2	2	2
Relative Humidity (%)	67	74	76	81	81	81	81	84	87	93	93	87	84	76	71	66	62	58	54	54	54	58	59	66
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Fog	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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