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NWS Transformation
Point Forecast:
Halfway MD
39.61N 77.77W (Elev. 551 ft)
Last Update: 4:53 am EDT Jul 19, 2026
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Weather Elements
Fire Weather
Aviation Weather
Temperature (°F)
Dewpoint (°F)
Heat Index (°F)
Surface Wind
kt
mph
km/h
m/s
Sky Cover (%)
Precipitation Potential (%)
Relative Humidity (%)
Rain
Thunder
Fog
Mixing Height
x100ft
x100m
Trans. Wind
kt
mph
km/h
m/s
Vent Rate (x1000 mph-ft)
Atmospheric Dispersion Index
Low Visibility Occurrence Risk Index
Ceiling Height
Visibility
48-Hour Period Starting:
6am Sun, Jul 19 2026
7am Sun, Jul 19 2026
8am Sun, Jul 19 2026
9am Sun, Jul 19 2026
10am Sun, Jul 19 2026
11am Sun, Jul 19 2026
12pm Sun, Jul 19 2026
1pm Sun, Jul 19 2026
2pm Sun, Jul 19 2026
3pm Sun, Jul 19 2026
4pm Sun, Jul 19 2026
5pm Sun, Jul 19 2026
6pm Sun, Jul 19 2026
7pm Sun, Jul 19 2026
8pm Sun, Jul 19 2026
9pm Sun, Jul 19 2026
10pm Sun, Jul 19 2026
11pm Sun, Jul 19 2026
12am Mon, Jul 20 2026
1am Mon, Jul 20 2026
2am Mon, Jul 20 2026
3am Mon, Jul 20 2026
4am Mon, Jul 20 2026
5am Mon, Jul 20 2026
6am Mon, Jul 20 2026
7am Mon, Jul 20 2026
8am Mon, Jul 20 2026
9am Mon, Jul 20 2026
10am Mon, Jul 20 2026
11am Mon, Jul 20 2026
12pm Mon, Jul 20 2026
1pm Mon, Jul 20 2026
2pm Mon, Jul 20 2026
3pm Mon, Jul 20 2026
4pm Mon, Jul 20 2026
5pm Mon, Jul 20 2026
6pm Mon, Jul 20 2026
7pm Mon, Jul 20 2026
8pm Mon, Jul 20 2026
9pm Mon, Jul 20 2026
10pm Mon, Jul 20 2026
11pm Mon, Jul 20 2026
12am Tue, Jul 21 2026
1am Tue, Jul 21 2026
2am Tue, Jul 21 2026
3am Tue, Jul 21 2026
4am Tue, Jul 21 2026
5am Tue, Jul 21 2026
6am Tue, Jul 21 2026
7am Tue, Jul 21 2026
8am Tue, Jul 21 2026
9am Tue, Jul 21 2026
10am Tue, Jul 21 2026
11am Tue, Jul 21 2026
12pm Tue, Jul 21 2026
1pm Tue, Jul 21 2026
2pm Tue, Jul 21 2026
3pm Tue, Jul 21 2026
4pm Tue, Jul 21 2026
5pm Tue, Jul 21 2026
6pm Tue, Jul 21 2026
7pm Tue, Jul 21 2026
8pm Tue, Jul 21 2026
9pm Tue, Jul 21 2026
10pm Tue, Jul 21 2026
11pm Tue, Jul 21 2026
12am Wed, Jul 22 2026
1am Wed, Jul 22 2026
2am Wed, Jul 22 2026
3am Wed, Jul 22 2026
4am Wed, Jul 22 2026
5am Wed, Jul 22 2026
6am Wed, Jul 22 2026
7am Wed, Jul 22 2026
8am Wed, Jul 22 2026
9am Wed, Jul 22 2026
10am Wed, Jul 22 2026
11am Wed, Jul 22 2026
12pm Wed, Jul 22 2026
1pm Wed, Jul 22 2026
2pm Wed, Jul 22 2026
3pm Wed, Jul 22 2026
4pm Wed, Jul 22 2026
5pm Wed, Jul 22 2026
6pm Wed, Jul 22 2026
7pm Wed, Jul 22 2026
8pm Wed, Jul 22 2026
9pm Wed, Jul 22 2026
10pm Wed, Jul 22 2026
11pm Wed, Jul 22 2026
12am Thu, Jul 23 2026
1am Thu, Jul 23 2026
2am Thu, Jul 23 2026
3am Thu, Jul 23 2026
4am Thu, Jul 23 2026
5am Thu, Jul 23 2026
6am Thu, Jul 23 2026
7am Thu, Jul 23 2026
8am Thu, Jul 23 2026
9am Thu, Jul 23 2026
10am Thu, Jul 23 2026
11am Thu, Jul 23 2026
12pm Thu, Jul 23 2026
1pm Thu, Jul 23 2026
2pm Thu, Jul 23 2026
3pm Thu, Jul 23 2026
4pm Thu, Jul 23 2026
5pm Thu, Jul 23 2026
Date
07/19
07/20
Hour (EDT)
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
00
01
02
03
04
05
Temperature (°F)
71
71
73
74
76
79
80
82
83
84
85
85
84
82
78
74
71
70
69
66
64
63
62
62
Dewpoint (°F)
67
67
67
66
66
65
64
63
63
61
60
59
59
60
60
60
59
59
59
60
60
60
59
58
Heat Index (°F)
76
79
82
83
84
84
85
85
84
82
78
Surface Wind (mph)
6
7
8
9
8
8
8
8
9
8
9
9
9
7
5
3
3
3
2
2
2
3
3
3
Wind Dir
NW
NW
NW
N
N
N
N
NW
NW
NW
NW
NW
N
N
N
N
NE
NE
NE
NE
N
N
N
N
Gust
Sky Cover (%)
45
32
31
33
39
42
45
47
49
48
39
25
11
11
4
20
24
19
32
31
30
30
22
19
Precipitation Potential (%)
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Relative Humidity (%)
87
87
81
76
71
62
58
53
51
46
43
41
43
47
54
62
66
68
70
81
87
90
90
87
Rain
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Thunder
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Date
07/21
Hour (EDT)
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
00
01
02
03
04
05
Temperature (°F)
61
62
66
70
73
76
79
80
82
83
84
84
83
81
79
75
72
71
70
70
70
69
69
68
Dewpoint (°F)
58
59
60
60
60
60
61
62
63
63
63
64
64
65
66
66
66
66
66
67
67
67
68
68
Heat Index (°F)
76
79
81
83
84
85
85
84
83
79
75
Surface Wind (mph)
3
3
3
2
2
3
3
5
6
6
6
6
6
7
8
8
8
9
9
8
8
8
8
8
Wind Dir
N
NE
NE
E
E
SE
S
S
S
S
S
S
SE
SE
SE
SE
SE
SE
SE
SE
SE
SE
S
S
Gust
Sky Cover (%)
16
18
16
22
28
30
46
40
40
23
12
20
9
11
46
65
73
81
83
85
87
87
87
87
Precipitation Potential (%)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
17
17
17
17
17
17
45
45
45
45
Relative Humidity (%)
90
90
81
71
64
58
54
54
53
51
49
51
53
58
64
74
81
84
87
90
90
93
97
100
Rain
--
--
--
--
--
--
--
--
--
--
--
--
--
--
SChc
SChc
SChc
SChc
SChc
SChc
Chc
Chc
Chc
Chc
Thunder
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
SChc
SChc
SChc
--
--
--
--
International System of Units
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