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Point Forecast: Rockville MD  39.08N 77.16W (Elev. 131 m)	Last Update: 3:48 pm EST Dec 7, 2021

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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: 6pm Tue, Dec 7 20217pm Tue, Dec 7 20218pm Tue, Dec 7 20219pm Tue, Dec 7 202110pm Tue, Dec 7 202111pm Tue, Dec 7 202112am Wed, Dec 8 20211am Wed, Dec 8 20212am Wed, Dec 8 20213am Wed, Dec 8 20214am Wed, Dec 8 20215am Wed, Dec 8 20216am Wed, Dec 8 20217am Wed, Dec 8 20218am Wed, Dec 8 20219am Wed, Dec 8 202110am Wed, Dec 8 202111am Wed, Dec 8 202112pm Wed, Dec 8 20211pm Wed, Dec 8 20212pm Wed, Dec 8 20213pm Wed, Dec 8 20214pm Wed, Dec 8 20215pm Wed, Dec 8 20216pm Wed, Dec 8 20217pm Wed, Dec 8 20218pm Wed, Dec 8 20219pm Wed, Dec 8 202110pm Wed, Dec 8 202111pm Wed, Dec 8 202112am Thu, Dec 9 20211am Thu, Dec 9 20212am Thu, Dec 9 20213am Thu, Dec 9 20214am Thu, Dec 9 20215am Thu, Dec 9 20216am Thu, Dec 9 20217am Thu, Dec 9 20218am Thu, Dec 9 20219am Thu, Dec 9 202110am Thu, Dec 9 202111am Thu, Dec 9 202112pm Thu, Dec 9 20211pm Thu, Dec 9 20212pm Thu, Dec 9 20213pm Thu, Dec 9 20214pm Thu, Dec 9 20215pm Thu, Dec 9 20216pm Thu, Dec 9 20217pm Thu, Dec 9 20218pm Thu, Dec 9 20219pm Thu, Dec 9 202110pm Thu, Dec 9 202111pm Thu, Dec 9 202112am Fri, Dec 10 20211am Fri, Dec 10 20212am Fri, Dec 10 20213am Fri, Dec 10 20214am Fri, Dec 10 20215am Fri, Dec 10 20216am Fri, Dec 10 20217am Fri, Dec 10 20218am Fri, Dec 10 20219am Fri, Dec 10 202110am Fri, Dec 10 202111am Fri, Dec 10 202112pm Fri, Dec 10 20211pm Fri, Dec 10 20212pm Fri, Dec 10 20213pm Fri, Dec 10 20214pm Fri, Dec 10 20215pm Fri, Dec 10 20216pm Fri, Dec 10 20217pm Fri, Dec 10 20218pm Fri, Dec 10 20219pm Fri, Dec 10 202110pm Fri, Dec 10 202111pm Fri, Dec 10 202112am Sat, Dec 11 20211am Sat, Dec 11 20212am Sat, Dec 11 20213am Sat, Dec 11 20214am Sat, Dec 11 20215am Sat, Dec 11 20216am Sat, Dec 11 20217am Sat, Dec 11 20218am Sat, Dec 11 20219am Sat, Dec 11 202110am Sat, Dec 11 202111am Sat, Dec 11 202112pm Sat, Dec 11 20211pm Sat, Dec 11 20212pm Sat, Dec 11 20213pm Sat, Dec 11 20214pm Sat, Dec 11 20215pm Sat, Dec 11 20216pm Sat, Dec 11 20217pm Sat, Dec 11 20218pm Sat, Dec 11 20219pm Sat, Dec 11 202110pm Sat, Dec 11 202111pm Sat, Dec 11 202112am Sun, Dec 12 20211am Sun, Dec 12 20212am Sun, Dec 12 20213am Sun, Dec 12 20214am Sun, Dec 12 20215am Sun, Dec 12 2021

Date	12/07						12/08
Hour (EST)	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17
Temperature (°C)	3	2	1	1	1	1	1	1	1	1	1	1	1	1	1	2	2	3	4	4	5	5	5	4
Dewpoint (°C)	-9	-7	-7	-7	-7	-6	-6	-6	-6	-6	-6	-4	-4	-4	-3	-2	-2	-1	-1	-1	-1	-1	-1	-1
Wind Chill (°C)	3	2	1	1	1	1	1	1	1	1	1	1	1	1	1	0	0	1	2	2	3	3	3	3
Surface Wind (mph)	2	2	1	2	2	2	2	2	2	2	2	2	2	2	2	3	5	6	6	6	5	5	5	3
Wind Dir	NE	E	E	E	E	E	E	E	E	E	E	E	E	E	E	SE	SE	S	S	S	SW	SW	W	W
Gust
Sky Cover (%)	55	65	70	76	81	87	92	98	98	99	99	99	100	100	100	100	100	100	100	100	100	100	100	78
Precipitation Potential (%)	0	0	0	0	0	0	0	7	7	7	10	10	10	33	33	33	32	32	32	6	6	6	1	1
Relative Humidity (%)	40	50	56	56	58	61	61	61	61	63	63	69	69	72	75	75	75	73	73	73	67	67	67	70
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	Chc	Chc	Chc	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	Chc	Chc	Chc	Chc	Chc	Chc	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date							12/09
Hour (EST)	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17
Temperature (°C)	3	2	2	1	1	1	-1	-1	-2	-2	-2	-2	-2	-2	-1	0	2	3	4	4	5	5	4	4
Dewpoint (°C)	-1	-1	-2	-3	-4	-4	-5	-5	-5	-6	-6	-6	-6	-6	-6	-5	-5	-5	-6	-6	-6	-6	-6	-5
Wind Chill (°C)	1	-1	-1	-2	-2	-2	-4	-4	-5	-5	-4	-5	-4	-4	-3	-2	0	3	4	3	3	3	3	2
Surface Wind (mph)	3	5	6	6	7	6	6	6	6	6	5	5	3	3	3	3	3	2	2	3	5	5	5	5
Wind Dir	W	W	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	SW	SW	S	S	S	SE
Gust
Sky Cover (%)	49	19	14	9	7	4	3	4	5	6	9	15	23	31	39	46	52	57	61	65	70	75	76	72
Precipitation Potential (%)	1	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 (%)	75	85	78	75	69	69	72	75	78	75	75	78	78	78	72	69	61	56	50	48	46	46	48	52
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Snow	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Freezing Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Sleet	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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