Point Forecast: 3 Miles SSW Mercersburg PA  39.78N 77.94W (Elev. 551 ft)	Last Update: 5:28 pm EDT May 5, 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 20ft Wind  ktmphkm/hm/s Vent Rate (x1000 mph-ft) Davis Stability Index Atmospheric Dispersion Index Low Visibility Occurrence Risk Index Ceiling Height Visibility Thunder Potential

48-Hour Period Starting: 7pm Sun, May 5 20248pm Sun, May 5 20249pm Sun, May 5 202410pm Sun, May 5 202411pm Sun, May 5 202412am Mon, May 6 20241am Mon, May 6 20242am Mon, May 6 20243am Mon, May 6 20244am Mon, May 6 20245am Mon, May 6 20246am Mon, May 6 20247am Mon, May 6 20248am Mon, May 6 20249am Mon, May 6 202410am Mon, May 6 202411am Mon, May 6 202412pm Mon, May 6 20241pm Mon, May 6 20242pm Mon, May 6 20243pm Mon, May 6 20244pm Mon, May 6 20245pm Mon, May 6 20246pm Mon, May 6 20247pm Mon, May 6 20248pm Mon, May 6 20249pm Mon, May 6 202410pm Mon, May 6 202411pm Mon, May 6 202412am Tue, May 7 20241am Tue, May 7 20242am Tue, May 7 20243am Tue, May 7 20244am Tue, May 7 20245am Tue, May 7 20246am Tue, May 7 20247am Tue, May 7 20248am Tue, May 7 20249am Tue, May 7 202410am Tue, May 7 202411am Tue, May 7 202412pm Tue, May 7 20241pm Tue, May 7 20242pm Tue, May 7 20243pm Tue, May 7 20244pm Tue, May 7 20245pm Tue, May 7 20246pm Tue, May 7 20247pm Tue, May 7 20248pm Tue, May 7 20249pm Tue, May 7 202410pm Tue, May 7 202411pm Tue, May 7 202412am Wed, May 8 20241am Wed, May 8 20242am Wed, May 8 20243am Wed, May 8 20244am Wed, May 8 20245am Wed, May 8 20246am Wed, May 8 20247am Wed, May 8 20248am Wed, May 8 20249am Wed, May 8 202410am Wed, May 8 202411am Wed, May 8 202412pm Wed, May 8 20241pm Wed, May 8 20242pm Wed, May 8 20243pm Wed, May 8 20244pm Wed, May 8 20245pm Wed, May 8 20246pm Wed, May 8 20247pm Wed, May 8 20248pm Wed, May 8 20249pm Wed, May 8 202410pm Wed, May 8 202411pm Wed, May 8 202412am Thu, May 9 20241am Thu, May 9 20242am Thu, May 9 20243am Thu, May 9 20244am Thu, May 9 20245am Thu, May 9 20246am Thu, May 9 20247am Thu, May 9 20248am Thu, May 9 20249am Thu, May 9 202410am Thu, May 9 202411am Thu, May 9 202412pm Thu, May 9 20241pm Thu, May 9 20242pm Thu, May 9 20243pm Thu, May 9 20244pm Thu, May 9 20245pm Thu, May 9 20246pm Thu, May 9 20247pm Thu, May 9 20248pm Thu, May 9 20249pm Thu, May 9 202410pm Thu, May 9 202411pm Thu, May 9 202412am Fri, May 10 20241am Fri, May 10 20242am Fri, May 10 20243am Fri, May 10 20244am Fri, May 10 20245am Fri, May 10 20246am Fri, May 10 2024

Date	05/05					05/06
Hour (EDT)	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18
Temperature (°F)	68	66	66	65	64	64	63	63	62	62	62	63	63	64	66	68	71	73	75	77	77	78	78	77
Dewpoint (°F)	61	62	62	61	61	61	61	61	61	61	61	61	62	63	63	63	64	63	63	63	63	62	62	62
Heat Index (°F)																			75	77	77	78	78	77
Surface Wind (mph)	6	5	6	6	5	3	2	1	1	0	1	1	1	1	1	2	2	3	3	5	5	5	5	5
Wind Dir	SE	SE	SE	SE	SE	SE	S	S	S	S	S	SW	SW	SW	W	NW	NW	NW	NW	NW	NW	N	N	N
Gust
Sky Cover (%)	93	96	93	94	94	95	95	96	95	95	95	90	88	88	90	95	92	91	91	90	86	81	77	76
Precipitation Potential (%)	35	37	30	26	20	16	12	12	9	7	4	6	7	9	13	16	19	24	26	30	33	32	32	29
Relative Humidity (%)	78	87	87	87	90	90	93	93	97	97	97	93	97	97	90	84	79	71	66	62	62	58	58	60
Rain	Chc	Chc	Chc	Chc	SChc	SChc	--	--	--	--	--	--	--	--	--	SChc	SChc	SChc	Chc	Chc	Chc	Chc	Chc	Chc
Thunder	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	Chc	Chc	Chc	Chc	Chc
Date						05/07
Hour (EDT)	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18
Temperature (°F)	75	73	69	66	66	65	64	63	62	62	61	62	62	63	66	69	72	74	76	78	77	77	76	75
Dewpoint (°F)	61	62	62	61	60	60	60	60	59	59	58	59	59	60	61	63	64	64	65	65	65	66	66	66
Heat Index (°F)	75																		76	78	77	77	76	75
Surface Wind (mph)	5	3	2	2	2	2	2	2	2	3	3	3	3	3	3	3	3	5	5	6	7	7	7	7
Wind Dir	N	NE	E	SW	NW	NW	N	N	N	NE	NE	NE	NE	NE	E	SE	SE	S	S	S	S	S	S	S
Gust
Sky Cover (%)	76	78	91	77	78	80	82	84	83	83	82	74	65	57	57	58	58	58	57	70	70	70	70	70
Precipitation Potential (%)	22	37	37	37	37	37	37	37	37	37	37	37	37	37	37	37	37	37	37	60	60	60	60	60
Relative Humidity (%)	62	68	78	84	81	84	87	90	90	90	90	90	90	90	84	81	76	71	69	64	67	69	71	74
Rain	SChc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Lkly	Lkly	Lkly	Lkly	Lkly
Thunder	SChc	Chc	Chc	Chc	Chc	Chc	Chc	--	--	--	--	--	--	--	--	--	Chc	Chc	Chc	Lkly	Lkly	Lkly	Lkly	Lkly

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