Point Forecast: Derwood MD  39.14N 77.12W (Elev. 400 ft)	Last Update: 4:30 pm EDT Jun 21, 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 Fri, Jun 21 20247pm Fri, Jun 21 20248pm Fri, Jun 21 20249pm Fri, Jun 21 202410pm Fri, Jun 21 202411pm Fri, Jun 21 202412am Sat, Jun 22 20241am Sat, Jun 22 20242am Sat, Jun 22 20243am Sat, Jun 22 20244am Sat, Jun 22 20245am Sat, Jun 22 20246am Sat, Jun 22 20247am Sat, Jun 22 20248am Sat, Jun 22 20249am Sat, Jun 22 202410am Sat, Jun 22 202411am 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 2024

Date	06/21						06/22
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)	94	93	90	86	84	81	79	78	77	75	75	73	74	75	80	84	87	93	95	97	98	98	98	97
Dewpoint (°F)	66	66	67	68	69	69	69	68	68	68	67	67	67	67	68	69	69	70	70	70	70	70	69	69
Heat Index (°F)	97	96	93	89	88	84	79	78	77	75	75			75	83	88	91	99	102	104	105	105	104	103
Surface Wind (mph)	5	5	5	5	6	5	5	3	3	3	2	2	2	2	3	3	5	5	5	6	6	6	7	7
Wind Dir	SW	S	SE	SE	S	S	S	S	S	S	S	S	S	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW
Gust
Sky Cover (%)	17	15	8	9	9	18	12	14	17	9	7	4	3	0	2	1	3	6	8	12	27	21	28	35
Precipitation Potential (%)	1	1	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	0	0	0	14	14	14	19
Relative Humidity (%)	40	41	47	55	61	67	72	71	74	79	76	81	79	76	67	61	55	47	45	42	41	41	39	40
Rain	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc
Thunder	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	SChc
Date							06/23
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)	96	94	92	89	86	84	84	83	82	80	78	77	77	79	81	85	88	91	94	95	96	95	95	93
Dewpoint (°F)	69	70	70	70	71	71	70	69	69	68	68	68	68	68	70	71	72	72	72	71	70	69	69	69
Heat Index (°F)	102	100	98	94	91	89	88	87	85	83	78	77	77	79	85	90	95	99	102	103	103	101	101	98
Surface Wind (mph)	6	6	5	5	5	5	5	6	6	6	6	6	6	6	6	7	7	8	9	9	10	10	10	10
Wind Dir	SW	S	S	S	S	S	S	S	S	S	S	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW
Gust																					18	18	18
Sky Cover (%)	31	30	30	30	37	43	40	35	32	30	25	22	23	24	24	27	34	37	43	54	60	64	73	77
Precipitation Potential (%)	19	19	5	5	5	5	5	5	0	0	0	0	0	0	5	5	5	5	5	5	38	38	38	38
Relative Humidity (%)	42	46	49	54	61	65	63	63	65	67	71	74	74	69	69	63	59	54	49	46	43	43	43	46
Rain	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	Chc	Chc	Chc	Chc
Thunder	SChc	SChc	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	--	Chc	Chc	Chc	Chc

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