Point Forecast: Herndon PA  40.7N 76.88W (Elev. 482 ft)	Last Update: 6:53 pm EDT Jun 26, 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 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 202411am Sat, Jun 29 202412pm Sat, Jun 29 20241pm Sat, Jun 29 20242pm Sat, Jun 29 20243pm Sat, Jun 29 20244pm Sat, Jun 29 20245pm Sat, Jun 29 20246pm Sat, Jun 29 20247pm Sat, Jun 29 20248pm Sat, Jun 29 20249pm Sat, Jun 29 202410pm Sat, Jun 29 202411pm Sat, Jun 29 202412am Sun, Jun 30 20241am Sun, Jun 30 20242am Sun, Jun 30 20243am Sun, Jun 30 20244am Sun, Jun 30 20245am Sun, Jun 30 20246am Sun, Jun 30 20247am Sun, Jun 30 20248am Sun, Jun 30 20249am Sun, Jun 30 202410am Sun, Jun 30 202411am Sun, Jun 30 202412pm Sun, Jun 30 20241pm Sun, Jun 30 20242pm Sun, Jun 30 20243pm Sun, Jun 30 20244pm Sun, Jun 30 20245pm Sun, Jun 30 20246pm Sun, Jun 30 20247pm Sun, Jun 30 20248pm Sun, Jun 30 20249pm Sun, Jun 30 202410pm Sun, Jun 30 202411pm Sun, Jun 30 202412am Mon, Jul 1 20241am Mon, Jul 1 20242am Mon, Jul 1 20243am Mon, Jul 1 20244am Mon, Jul 1 20245am Mon, Jul 1 20246am Mon, Jul 1 2024

Date	06/26					06/27
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)	82	78	74	72	71	70	69	68	68	67	67	66	68	69	71	73	75	76	78	80	80	81	82	81
Dewpoint (°F)	67	67	68	68	67	67	67	66	65	65	64	64	64	65	64	63	62	61	60	59	58	58	57	57
Heat Index (°F)	85	78															75	76	78	81	81	81	82	81
Surface Wind (mph)	1	6	5	6	3	5	5	5	5	5	5	5	6	6	6	6	6	6	7	7	7	7	7	7
Wind Dir	NW	N	N	N	E	SW	SW	SW	SW	W	SW	SW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW	NW
Gust
Sky Cover (%)	91	95	99	98	99	98	98	95	92	87	78	62	43	30	25	24	24	24	23	23	19	18	19	19
Precipitation Potential (%)	71	80	80	83	83	82	82	58	34	10	8	6	4	2	3	4	5	5	6	5	4	3	3	2
Relative Humidity (%)	61	69	82	87	87	90	93	93	90	93	90	93	87	87	79	71	64	60	54	49	47	46	43	44
Rain	Lkly	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Ocnl	Lkly	Chc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	Lkly	Ocnl	Ocnl	Ocnl	Ocnl	Lkly	Lkly	Chc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Date						06/28
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)	79	78	73	71	68	66	63	61	60	58	57	59	60	62	65	68	71	74	76	79	80	80	81	80
Dewpoint (°F)	58	58	57	57	56	55	54	53	52	52	51	51	52	52	52	51	51	51	52	52	53	53	54	55
Heat Index (°F)	79	78																	76	79	80	80	81	80
Surface Wind (mph)	7	7	7	7	7	7	6	6	5	5	3	3	3	3	3	2	2	2	3	3	3	5	5	5
Wind Dir	N	N	N	N	N	N	N	N	N	N	N	N	NE	NE	NE	E	E	E	SE	SE	SE	S	S	S
Gust
Sky Cover (%)	19	16	15	14	13	11	10	9	10	11	11	12	13	13	13	12	11	11	10	9	15	21	27	33
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 (%)	49	50	57	61	65	68	72	75	75	80	80	75	75	70	63	54	49	44	43	39	39	39	39	42
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--

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