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Point Forecast: Sterling VA  38.99N 77.41W (Elev. 99 m)	Last Update: 6:32 pm EST Jan 19, 2020

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Weather Elements Weather/Precipitation Fire Weather Temperature (°C) Dewpoint (°C) Wind Chill (°C) 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-m) Atmospheric Dispersion Index Low Visibility Occurrence Risk Index

48-Hour Period Starting: 9pm Sun, Jan 19 202010pm Sun, Jan 19 202011pm Sun, Jan 19 202012am Mon, Jan 20 20201am Mon, Jan 20 20202am Mon, Jan 20 20203am Mon, Jan 20 20204am Mon, Jan 20 20205am Mon, Jan 20 20206am Mon, Jan 20 20207am Mon, Jan 20 20208am Mon, Jan 20 20209am Mon, Jan 20 202010am Mon, Jan 20 202011am Mon, Jan 20 202012pm Mon, Jan 20 20201pm Mon, Jan 20 20202pm Mon, Jan 20 20203pm Mon, Jan 20 20204pm Mon, Jan 20 20205pm Mon, Jan 20 20206pm Mon, Jan 20 20207pm Mon, Jan 20 20208pm Mon, Jan 20 20209pm Mon, Jan 20 202010pm Mon, Jan 20 202011pm Mon, Jan 20 202012am Tue, Jan 21 20201am Tue, Jan 21 20202am Tue, Jan 21 20203am Tue, Jan 21 20204am Tue, Jan 21 20205am Tue, Jan 21 20206am Tue, Jan 21 20207am Tue, Jan 21 20208am Tue, Jan 21 20209am Tue, Jan 21 202010am Tue, Jan 21 202011am Tue, Jan 21 202012pm Tue, Jan 21 20201pm Tue, Jan 21 20202pm Tue, Jan 21 20203pm Tue, Jan 21 20204pm Tue, Jan 21 20205pm Tue, Jan 21 20206pm Tue, Jan 21 20207pm Tue, Jan 21 20208pm Tue, Jan 21 20209pm Tue, Jan 21 202010pm Tue, Jan 21 202011pm Tue, Jan 21 202012am Wed, Jan 22 20201am Wed, Jan 22 20202am Wed, Jan 22 20203am Wed, Jan 22 20204am Wed, Jan 22 20205am Wed, Jan 22 20206am Wed, Jan 22 20207am Wed, Jan 22 20208am Wed, Jan 22 20209am Wed, Jan 22 202010am Wed, Jan 22 202011am Wed, Jan 22 202012pm Wed, Jan 22 20201pm Wed, Jan 22 20202pm Wed, Jan 22 20203pm Wed, Jan 22 20204pm Wed, Jan 22 20205pm Wed, Jan 22 20206pm Wed, Jan 22 20207pm Wed, Jan 22 20208pm Wed, Jan 22 20209pm Wed, Jan 22 202010pm Wed, Jan 22 202011pm Wed, Jan 22 202012am Thu, Jan 23 20201am Thu, Jan 23 20202am Thu, Jan 23 20203am Thu, Jan 23 20204am Thu, Jan 23 20205am Thu, Jan 23 20206am Thu, Jan 23 20207am Thu, Jan 23 20208am Thu, Jan 23 20209am Thu, Jan 23 202010am Thu, Jan 23 202011am Thu, Jan 23 202012pm Thu, Jan 23 20201pm Thu, Jan 23 20202pm Thu, Jan 23 20203pm Thu, Jan 23 20204pm Thu, Jan 23 20205pm Thu, Jan 23 20206pm Thu, Jan 23 20207pm Thu, Jan 23 20208pm Thu, Jan 23 20209pm Thu, Jan 23 202010pm Thu, Jan 23 202011pm Thu, Jan 23 202012am Fri, Jan 24 20201am Fri, Jan 24 20202am Fri, Jan 24 20203am Fri, Jan 24 20204am Fri, Jan 24 20205am Fri, Jan 24 20206am Fri, Jan 24 20207am Fri, Jan 24 20208am Fri, Jan 24 2020

Date	01/19			01/20
Hour (EST)	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20
Temperature (°C)	-2	-3	-3	-3	-4	-4	-4	-4	-4	-4	-6	-5	-4	-3	-2	-1	-1	0	0	-1	-2	-2	-3	-4
Dewpoint (°C)	-9	-9	-9	-10	-10	-10	-10	-10	-10	-11	-11	-11	-11	-11	-11	-11	-11	-11	-11	-11	-11	-11	-11	-11
Wind Chill (°C)	-9	-9	-9	-10	-10	-11	-11	-11	-11	-11	-12	-12	-11	-9	-8	-7	-6	-5	-5	-6	-7	-8	-9	-9
Surface Wind (mph)	15	15	14	14	13	13	13	13	13	13	13	14	15	15	15	14	13	13	13	13	11	11	10	10
Wind Dir	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	N	N	NW	NW	NW	NW
Gust
Sky Cover (%)	20	21	23	25	27	25	26	27	27	28	29	26	23	20	17	14	11	11	10	10	10	9	9	10
Precipitation Potential (%)	2	2	2	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	0	0
Relative Humidity (%)	58	60	60	60	62	65	65	65	65	62	68	65	60	55	51	49	47	45	43	45	48	53	57	60
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date				01/21
Hour (EST)	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20
Temperature (°C)	-4	-4	-5	-5	-5	-6	-6	-6	-6	-6	-6	-6	-4	-3	-2	-1	1	1	1	1	-1	-1	-2	-3
Dewpoint (°C)	-10	-10	-10	-11	-11	-11	-11	-11	-11	-11	-11	-11	-10	-10	-10	-10	-10	-10	-9	-9	-9	-9	-9	-8
Wind Chill (°C)	-9	-10	-10	-9	-9	-10	-11	-12	-11	-11	-11	-10	-10	-8	-7	-4	-3	-3	-3	-4	-5	-5	-6	-7
Surface Wind (mph)	9	9	8	7	7	7	8	8	7	6	6	7	9	10	9	8	7	8	9	10	9	7	6	6
Wind Dir	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	N	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW
Gust
Sky Cover (%)	11	12	12	11	11	13	17	19	16	11	8	9	11	12	11	9	8	8	9	9	11	14	16	16
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Relative Humidity (%)	62	65	68	65	65	68	68	71	71	71	71	68	65	57	53	49	45	45	45	47	51	55	60	65
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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