Point Forecast: Mc Lean VA  38.95N 77.19W (Elev. 253 ft)	Last Update: 4:30 pm EDT Sep 25, 2024

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Weather Elements Fire Weather Aviation 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) Atmospheric Dispersion Index Low Visibility Occurrence Risk Index Ceiling Height Visibility

48-Hour Period Starting: 6pm Wed, Sep 25 20247pm Wed, Sep 25 20248pm Wed, Sep 25 20249pm Wed, Sep 25 202410pm Wed, Sep 25 202411pm Wed, Sep 25 202412am Thu, Sep 26 20241am Thu, Sep 26 20242am Thu, Sep 26 20243am Thu, Sep 26 20244am Thu, Sep 26 20245am Thu, Sep 26 20246am Thu, Sep 26 20247am Thu, Sep 26 20248am Thu, Sep 26 20249am Thu, Sep 26 202410am Thu, Sep 26 202411am Thu, Sep 26 202412pm Thu, Sep 26 20241pm Thu, Sep 26 20242pm Thu, Sep 26 20243pm Thu, Sep 26 20244pm Thu, Sep 26 20245pm Thu, Sep 26 20246pm Thu, Sep 26 20247pm Thu, Sep 26 20248pm Thu, Sep 26 20249pm Thu, Sep 26 202410pm Thu, Sep 26 202411pm Thu, Sep 26 202412am Fri, Sep 27 20241am Fri, Sep 27 20242am Fri, Sep 27 20243am Fri, Sep 27 20244am Fri, Sep 27 20245am Fri, Sep 27 20246am Fri, Sep 27 20247am Fri, Sep 27 20248am Fri, Sep 27 20249am Fri, Sep 27 202410am Fri, Sep 27 202411am Fri, Sep 27 202412pm Fri, Sep 27 20241pm Fri, Sep 27 20242pm Fri, Sep 27 20243pm Fri, Sep 27 20244pm Fri, Sep 27 20245pm Fri, Sep 27 20246pm Fri, Sep 27 20247pm Fri, Sep 27 20248pm Fri, Sep 27 20249pm Fri, Sep 27 202410pm Fri, Sep 27 202411pm Fri, Sep 27 202412am Sat, Sep 28 20241am Sat, Sep 28 20242am Sat, Sep 28 20243am Sat, Sep 28 20244am Sat, Sep 28 20245am Sat, Sep 28 20246am Sat, Sep 28 20247am Sat, Sep 28 20248am Sat, Sep 28 20249am Sat, Sep 28 202410am Sat, Sep 28 202411am Sat, Sep 28 202412pm Sat, Sep 28 20241pm Sat, Sep 28 20242pm Sat, Sep 28 20243pm Sat, Sep 28 20244pm Sat, Sep 28 20245pm Sat, Sep 28 20246pm Sat, Sep 28 20247pm Sat, Sep 28 20248pm Sat, Sep 28 20249pm Sat, Sep 28 202410pm Sat, Sep 28 202411pm Sat, Sep 28 202412am Sun, Sep 29 20241am Sun, Sep 29 20242am Sun, Sep 29 20243am Sun, Sep 29 20244am Sun, Sep 29 20245am Sun, Sep 29 20246am Sun, Sep 29 20247am Sun, Sep 29 20248am Sun, Sep 29 20249am Sun, Sep 29 202410am Sun, Sep 29 202411am Sun, Sep 29 202412pm Sun, Sep 29 20241pm Sun, Sep 29 20242pm Sun, Sep 29 20243pm Sun, Sep 29 20244pm Sun, Sep 29 20245pm Sun, Sep 29 20246pm Sun, Sep 29 20247pm Sun, Sep 29 20248pm Sun, Sep 29 20249pm Sun, Sep 29 202410pm Sun, Sep 29 202411pm Sun, Sep 29 202412am Mon, Sep 30 20241am Mon, Sep 30 20242am Mon, Sep 30 20243am Mon, Sep 30 20244am Mon, Sep 30 20245am Mon, Sep 30 2024

Date	09/25						09/26
Hour (EDT)	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 (°F)	71	71	70	69	69	70	70	69	69	69	69	68	69	68	70	71	72	73	74	76	77	77	78	78
Dewpoint (°F)	71	71	70	69	69	70	70	69	69	69	69	68	69	68	70	71	72	73	73	73	73	73	73	73
Heat Index (°F)																				76	77	77	78	78
Surface Wind (mph)	7	6	6	6	6	6	6	6	6	6	5	5	5	5	5	5	6	6	6	7	7	7	6	6
Wind Dir	SE	SE	SE	SE	SE	SE	SE	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S
Gust
Sky Cover (%)	90	91	91	86	92	82	88	89	93	91	90	93	93	90	89	94	97	98	98	94	98	94	93	97
Precipitation Potential (%)	39	39	31	31	31	35	35	35	41	41	41	40	40	40	18	18	18	18	18	18	20	20	20	20
Relative Humidity (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	97	90	87	87	85	85
Rain	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc
Thunder	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	SChc	SChc	SChc	--	--	--	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	--
Date							09/27
Hour (EDT)	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 (°F)	76	75	73	72	71	71	71	70	70	70	70	70	70	70	70	71	71	72	72	73	73	73	74	74
Dewpoint (°F)	73	72	73	72	71	71	71	70	70	70	70	70	70	70	70	71	71	72	72	72	72	72	72	72
Heat Index (°F)	76	75
Surface Wind (mph)	6	5	5	5	3	3	3	2	2	2	2	3	5	5	6	7	7	8	8	9	9	9	10	10
Wind Dir	S	S	S	S	SE	SE	SE	SE	SE	SE	E	E	E	E	E	E	E	E	E	E	E	E	E	E
Gust																						18	18	18
Sky Cover (%)	92	93	92	92	91	89	90	93	94	94	93	93	92	91	90	91	94	95	95	96	96	96	95	94
Precipitation Potential (%)	20	20	19	19	19	19	19	19	20	20	20	20	20	20	37	37	37	37	37	37	44	44	44	44
Relative Humidity (%)	90	90	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	97	97	97	93	93
Rain	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	SChc

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