Point Forecast: Mercersburg PA  39.82N 77.9W (Elev. 600 ft)	Last Update: 7:09 am EDT Jun 22, 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: 11am Sat, Jun 22 202412pm Sat, Jun 22 20241pm Sat, Jun 22 20242pm Sat, Jun 22 20243pm Sat, Jun 22 20244pm Sat, Jun 22 20245pm Sat, Jun 22 20246pm Sat, Jun 22 20247pm Sat, Jun 22 20248pm Sat, Jun 22 20249pm Sat, Jun 22 202410pm Sat, Jun 22 202411pm Sat, Jun 22 202412am Sun, Jun 23 20241am Sun, Jun 23 20242am Sun, Jun 23 20243am Sun, Jun 23 20244am Sun, Jun 23 20245am Sun, Jun 23 20246am Sun, Jun 23 20247am Sun, Jun 23 20248am Sun, Jun 23 20249am Sun, Jun 23 202410am Sun, Jun 23 202411am Sun, Jun 23 202412pm Sun, Jun 23 20241pm Sun, Jun 23 20242pm Sun, Jun 23 20243pm Sun, Jun 23 20244pm Sun, Jun 23 20245pm Sun, Jun 23 20246pm Sun, Jun 23 20247pm Sun, Jun 23 20248pm Sun, Jun 23 20249pm Sun, Jun 23 202410pm Sun, Jun 23 202411pm Sun, Jun 23 202412am Mon, Jun 24 20241am Mon, Jun 24 20242am Mon, Jun 24 20243am Mon, Jun 24 20244am Mon, Jun 24 20245am Mon, Jun 24 20246am Mon, Jun 24 20247am Mon, Jun 24 20248am Mon, Jun 24 20249am Mon, Jun 24 202410am Mon, Jun 24 202411am Mon, Jun 24 202412pm Mon, Jun 24 20241pm Mon, Jun 24 20242pm Mon, Jun 24 20243pm Mon, Jun 24 20244pm Mon, Jun 24 20245pm Mon, Jun 24 20246pm Mon, Jun 24 20247pm Mon, Jun 24 20248pm Mon, Jun 24 20249pm Mon, Jun 24 202410pm Mon, Jun 24 202411pm Mon, Jun 24 202412am Tue, Jun 25 20241am Tue, Jun 25 20242am Tue, Jun 25 20243am Tue, Jun 25 20244am Tue, Jun 25 20245am Tue, Jun 25 20246am Tue, Jun 25 20247am Tue, Jun 25 20248am Tue, Jun 25 20249am Tue, Jun 25 202410am Tue, Jun 25 202411am Tue, Jun 25 202412pm Tue, Jun 25 20241pm Tue, Jun 25 20242pm Tue, Jun 25 20243pm Tue, Jun 25 20244pm Tue, Jun 25 20245pm Tue, Jun 25 20246pm Tue, Jun 25 20247pm Tue, Jun 25 20248pm Tue, Jun 25 20249pm Tue, Jun 25 202410pm Tue, Jun 25 202411pm Tue, Jun 25 202412am Wed, Jun 26 20241am Wed, Jun 26 20242am Wed, Jun 26 20243am Wed, Jun 26 20244am Wed, Jun 26 20245am Wed, Jun 26 20246am Wed, Jun 26 20247am Wed, Jun 26 20248am Wed, Jun 26 20249am Wed, Jun 26 202410am Wed, Jun 26 202411am Wed, Jun 26 202412pm Wed, Jun 26 20241pm Wed, Jun 26 20242pm Wed, Jun 26 20243pm Wed, Jun 26 20244pm Wed, Jun 26 20245pm Wed, Jun 26 20246pm Wed, Jun 26 20247pm Wed, Jun 26 20248pm Wed, Jun 26 20249pm Wed, Jun 26 202410pm Wed, Jun 26 2024

Date	06/22													06/23
Hour (EDT)	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10
Temperature (°F)	92	94	95	96	97	98	97	95	93	90	86	84	82	80	79	78	76	76	75	73	75	79	82	88
Dewpoint (°F)	70	69	68	68	67	67	67	68	69	70	71	72	71	71	71	70	69	69	69	69	70	72	71	70
Heat Index (°F)	98	99	100	101	101	103	101	100	98	96	91	90	86	83	79	78	76	76	75		75	79	86	93
Surface Wind (mph)	3	5	5	5	5	5	5	5	3	3	2	2	1	1	1	2	2	2	2	2	2	3	6	8
Wind Dir	W	W	W	W	W	SW	W	SW	SW	SW	NW	SW	SW	W	W	S	SW	SW	SW	SW	SW	SW	SW	SW
Gust
Sky Cover (%)	26	35	41	48	46	44	42	45	48	51	50	48	46	44	42	41	40	40	40	40	40	40	47	55
Precipitation Potential (%)	5	10	12	15	17	20	22	20	19	17	15	13	11	8	6	4	4	4	4	4	4	4	5	5
Relative Humidity (%)	49	44	42	40	38	37	38	42	46	52	61	67	69	74	77	76	79	79	82	87	84	79	69	55
Rain	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	SChc	SChc	SChc	SChc	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date														06/24
Hour (EDT)	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10
Temperature (°F)	91	92	92	93	93	93	92	89	86	84	82	79	77	76	74	73	72	71	70	71	72	73	76	79
Dewpoint (°F)	70	70	69	69	69	68	68	68	69	69	69	70	70	69	69	68	68	67	67	67	67	67	66	65
Heat Index (°F)	97	98	97	98	98	97	96	93	90	88	85	79	77	76									76	79
Surface Wind (mph)	9	10	10	10	10	10	10	9	7	6	5	5	5	5	3	3	3	3	3	3	5	6	7	8
Wind Dir	SW	SW	SW	SW	SW	W	W	W	SW	SW	SW	SW	SW	W	W	W	W	W	W	W	W	W	W	NW
Gust		21	22	22	22	21	20
Sky Cover (%)	63	63	62	62	65	69	72	72	72	72	68	63	58	54	49	45	43	42	40	38	37	35	34	34
Precipitation Potential (%)	6	6	23	39	39	39	39	39	39	48	48	48	48	48	48	19	19	19	19	19	19	15	15	15
Relative Humidity (%)	50	49	47	46	46	44	46	50	57	61	65	74	79	79	84	84	87	87	90	87	84	81	71	62
Rain	--	--	SChc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc	SChc
Thunder	--	--	SChc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	Chc	--	--	--	--	--	--	--	--	--

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