Point Forecast: Herndon PA  40.72N 76.85W (Elev. 397 ft)	Last Update: 11:07 pm EDT Jun 24, 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: 11pm 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 202411pm Wed, Jun 26 202412am Thu, Jun 27 20241am Thu, Jun 27 20242am Thu, Jun 27 20243am Thu, Jun 27 20244am Thu, Jun 27 20245am Thu, Jun 27 20246am Thu, Jun 27 20247am Thu, Jun 27 20248am Thu, Jun 27 20249am Thu, Jun 27 202410am Thu, Jun 27 202411am Thu, Jun 27 202412pm Thu, Jun 27 20241pm Thu, Jun 27 20242pm Thu, Jun 27 20243pm Thu, Jun 27 20244pm Thu, Jun 27 20245pm Thu, Jun 27 20246pm Thu, Jun 27 20247pm Thu, Jun 27 20248pm Thu, Jun 27 20249pm Thu, Jun 27 202410pm Thu, Jun 27 202411pm Thu, Jun 27 202412am Fri, Jun 28 20241am Fri, Jun 28 20242am Fri, Jun 28 20243am Fri, Jun 28 20244am Fri, Jun 28 20245am Fri, Jun 28 20246am Fri, Jun 28 20247am Fri, Jun 28 20248am Fri, Jun 28 20249am Fri, Jun 28 202410am Fri, Jun 28 202411am Fri, Jun 28 202412pm Fri, Jun 28 20241pm Fri, Jun 28 20242pm Fri, Jun 28 20243pm Fri, Jun 28 20244pm Fri, Jun 28 20245pm Fri, Jun 28 20246pm Fri, Jun 28 20247pm Fri, Jun 28 20248pm Fri, Jun 28 20249pm Fri, Jun 28 202410pm Fri, Jun 28 202411pm Fri, Jun 28 202412am Sat, Jun 29 20241am Sat, Jun 29 20242am Sat, Jun 29 20243am Sat, Jun 29 20244am Sat, Jun 29 20245am Sat, Jun 29 20246am Sat, Jun 29 20247am Sat, Jun 29 20248am Sat, Jun 29 20249am Sat, Jun 29 202410am Sat, Jun 29 2024

Date	06/24	06/25
Hour (EDT)	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22
Temperature (°F)	68	67	65	64	62	61	60	60	62	67	71	76	80	83	85	87	89	90	89	87	86	84	80	77
Dewpoint (°F)	54	53	53	53	53	53	54	55	56	57	57	57	57	56	54	53	54	55	56	57	58	59	59	59
Heat Index (°F)												76	80	82	83	85	87	88	87	86	85	84	81	77
Surface Wind (mph)	5	3	3	2	2	1	1	1	1	1	1	2	3	5	6	6	6	6	6	6	5	2	2	2
Wind Dir	NW	NW	W	W	W	SW	SW	SW	S	S	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	S	S
Gust
Sky Cover (%)	0	0	0	0	0	0	0	0	0	0	2	4	5	7	13	19	23	26	30	32	33	35	40	45
Precipitation Potential (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	8	8	8
Relative Humidity (%)	61	61	65	67	72	75	81	84	81	70	61	52	45	40	35	31	30	31	33	36	39	43	49	54
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date		06/26
Hour (EDT)	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22
Temperature (°F)	75	75	74	72	71	70	69	71	74	76	79	81	84	86	88	90	89	88	87	84	82	79	77	74
Dewpoint (°F)	60	60	61	62	62	62	62	63	65	66	67	68	69	69	68	68	68	69	69	69	68	68	68	68
Heat Index (°F)	75	75								76	79	84	88	90	92	94	93	92	91	88	85	79	77
Surface Wind (mph)	2	2	2	2	2	2	2	2	2	2	3	3	5	5	6	6	6	6	6	5	3	2	2	2
Wind Dir	S	S	S	S	S	S	S	SW	SW	SW	SW	SW	SW	SW	SW	SW	W	W	W	W	W	W	W	NW
Gust
Sky Cover (%)	50	55	59	64	64	63	62	63	63	64	67	71	74	78	81	85	85	85	85	85	85	82	82	82
Precipitation Potential (%)	17	17	17	17	17	17	13	13	13	37	37	37	47	47	47	62	62	62	59	59	59	54	54	54
Relative Humidity (%)	60	60	64	71	73	76	78	76	74	71	67	65	61	57	52	49	50	54	55	61	63	69	74	82
Rain	SChc	SChc	SChc	SChc	SChc	SChc	--	--	--	Chc	Chc	Chc	Chc	Chc	Chc	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Chc	Chc	Chc
Thunder	SChc	SChc	SChc	SChc	SChc	SChc	--	--	--	SChc	SChc	SChc	Chc	Chc	Chc	Lkly	Lkly	Lkly	Lkly	Lkly	Lkly	Chc	Chc	Chc

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