Point Forecast Matrices
Issued by NWS Sterling, VA

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Point Forecast Matrices
National Weather Service Baltimore MD/Washington DC
1233 AM EST Mon Dec 18 2017

VAZ054-182100-
Reagan National Airport-Arlington VA
38.86N  77.03W Elev. 66 ft
1233 AM EST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
EST 3hrly     04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      54          40          60          43          50
Temp          39 39 45 51 54 47 45 43 41 41 50 58 59 54 51 48 45 44 47 49 47 41
Dewpt         35 34 36 37 40 39 40 39 38 37 41 40 41 41 41 41 38 34 30 27 26 26
RH            85 82 70 59 59 74 82 86 89 85 71 51 51 61 68 77 76 68 51 42 43 55
Wind dir       N NW  W SW SW SW SW SW SW SW SW SW SW  W  W  W  W NW NW NW NW  N
Wind spd       2  2  3  4  4  4  3  3  3  2  6 12 13 11 12 12  9  4  8  6  8  4
Clouds        B2 B1 B1 B1 B1 B1 B1 B1 SC SC FW FW FW FW SC B1 SC B1 SC B1 SC B1
PoP 12hr                      5           5           0           0          10
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00


Date          Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
EST 6hrly     01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Min/Max          32    45      34    52      44    59      41    49
Temp          37 34 44 40   37 37 50 48   46 46 57 50   46 42 48 45
Dewpt         26 25 24 26   29 31 38 41   45 43 47 45   41 37 34 36
PWind dir         N    NE      SE     S       S    SW      NW     N
Wind char        LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    SC SC SC FW   FW SC B1 B2   B2 B2 B2 B2   B2 B2 B2 B2
PoP 12hr         10     5       5    10      40    50      40    40
Rain shwrs                                 C  C  C  C    C  C  C  C

$$
MDZ013-182100-
Baltimore/Washington Airport-Anne Arundel MD
39.19N  76.67W Elev. 154 ft
1233 AM EST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
EST 3hrly     04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      50          38          58          40          47
Temp          34 34 40 48 49 44 42 40 39 39 48 56 57 51 48 45 43 41 44 46 44 38
Dewpt         34 32 35 37 38 37 37 37 36 36 40 39 39 39 39 39 35 31 28 24 24 25
RH           100 92 82 65 66 76 82 89 89 89 74 53 51 63 71 79 73 67 53 42 45 59
Wind dir       E  W  W  W SW SW  W  W  W SW SW SW SW  W  W  W  W NW NW NW NW NW
Wind spd       1  2  4  4  4  4  4  3  4  3  8 12 13  9  9  8  6  4  9  9  9  5
Clouds        OV B1 B1 B1 B1 B1 B1 B1 SC SC SC FW FW FW SC B1 SC B1 SC B1 SC SC
PoP 12hr                      5           5           0           0          10
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00


Date          Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
EST 6hrly     01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Min/Max          29    43      32    51      42    57      38    48
Temp          34 31 41 38   35 35 49 47   45 44 55 48   44 40 47 43
Dewpt         24 22 23 24   27 30 37 41   43 42 46 44   38 34 33 36
PWind dir         N    NE      SE     S       S    SW      NW     N
Wind char        LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    SC SC SC FW   FW SC B1 B2   B2 B2 B2 B2   B2 B1 B2 B2
PoP 12hr          5     0       5    10      40    50      40    40
Rain shwrs                                 C  C  C  C    C  C  C  C

$$
MDZ011-182100-
Baltimore Inner Harbor-Baltimore City MD
39.28N  76.61W Elev. 20 ft
1233 AM EST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
EST 3hrly     04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      51          40          59          41          47
Temp          38 38 44 50 50 45 44 43 41 41 51 58 58 53 50 46 43 42 44 46 44 39
Dewpt         35 33 35 37 38 38 38 38 36 36 39 39 39 40 39 39 35 31 28 25 24 25
RH            89 82 70 61 63 76 79 82 82 82 63 49 49 61 66 76 73 65 53 43 45 57
Wind dir      NE NW  W  W SW SW  W  W  W SW SW SW SW  W  W  W  W NW NW NW NW NW
Wind spd       2  2  3  4  5  4  4  3  4  3  8 12 13 11 12 12  9  4  9  8  9  4
Clouds        OV B1 B1 B1 B1 B1 B1 B1 SC SC SC FW FW FW SC B1 FW B1 SC B1 SC SC
PoP 12hr                      5           5           0           0           5
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00


Date          Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
EST 6hrly     01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Min/Max          30    43      32    51      44    57      39    48
Temp          35 32 42 38   35 35 49 48   46 46 56 48   44 40 47 43
Dewpt         24 22 22 24   27 30 37 41   44 43 46 44   39 34 33 36
PWind dir         N    NE      SE     S       S    SW      NW    NE
Wind char        LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    SC SC SC FW   FW SC B1 B2   B2 B2 B2 B2   B2 B1 B1 B2
PoP 12hr          5     0       5    20      40    50      40    40
Rain shwrs                         S  S    C  C  C  C    C  C  C  C

$$
WVZ052-182100-
Martinsburg Airport-Berkeley WV
39.41N  77.98W Elev. 558 ft
1233 AM EST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
EST 3hrly     04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      53          38          60          37          46
Temp          33 31 39 49 53 45 42 42 39 39 47 57 60 53 50 45 41 38 42 45 43 36
Dewpt         32 30 33 38 39 38 36 36 35 34 38 38 38 37 36 36 31 27 24 23 21 24
RH            96 96 79 66 59 76 79 79 85 82 71 49 44 54 58 70 67 64 48 41 41 61
Wind dir      NW  W SW  W  W  W SW SW SW SW SW  W  W  W  W  W  W NW NW NW NW NW
Wind spd       2  2  3  6  5  5  4  3  4  3  9 12 13 10  9  8  6  5  9  8  8  4
Clouds        OV B1 B1 B1 B1 B1 B2 B2 B1 SC SC SC FW FW SC B1 FW B1 SC B1 SC SC
PoP 12hr                      5           5           0           0          10
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00


Date          Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
EST 6hrly     01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Min/Max          26    43      29    49      38    55      34    46
Temp          32 29 41 36   33 32 47 44   41 41 53 45   40 36 45 40
Dewpt         22 21 23 24   23 25 33 36   37 36 44 38   33 29 32 32
PWind dir         N    SE      SE     S       S    SW      NW     N
Wind char        LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    SC SC SC SC   SC SC B1 B2   B2 B2 B2 B2   B1 B1 B1 B2
PoP 12hr          5     0       5    20      40    50      40    40
Rain shwrs                         S  S    C  C  C  C    C  C  C  C

$$
VAZ506-182100-
Washington Dulles Airport-Loudoun VA
38.96N  77.45W Elev. 321 ft
1233 AM EST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
EST 3hrly     04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      54          38          60          39          48
Temp          34 32 40 51 53 45 43 41 39 39 49 58 59 52 49 46 42 40 44 47 45 39
Dewpt         33 31 34 37 38 38 38 38 36 35 39 39 39 39 38 39 36 31 28 25 23 24
RH            96 96 79 59 57 76 82 89 89 85 68 49 47 61 66 76 79 70 53 42 41 54
Wind dir      SE  W  W SW SW SW  W SW SW SW SW SW SW  W  W  W  W NW NW NW NW  N
Wind spd       1  2  3  4  4  4  3  3  4  2  8 12 13  9  9  8  6  4  9  8  9  5
Clouds        B2 B1 B1 B1 B1 B1 B1 B1 SC SC FW FW FW FW SC B1 SC B1 SC B1 SC SC
PoP 12hr                      5           5           0           0          10
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00


Date          Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
EST 6hrly     01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Min/Max          29    44      30    50      41    57      37    48
Temp          35 31 42 37   34 33 48 46   44 44 55 47   43 39 47 43
Dewpt         25 22 23 24   26 28 36 39   42 41 46 43   38 34 33 35
PWind dir         N    NE      SE     S       S    SW      NW     N
Wind char        LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    SC SC SC FW   FW SC B1 B2   B2 B2 B2 B2   B2 B1 B1 B2
PoP 12hr         10     5       5    10      40    50      40    40
Rain shwrs                                 C  C  C  C    C  C  C  C

$$
VAZ037-182100-
Charlottesville Airport-Albemarle VA
38.14N  78.45W Elev. 640 ft
1233 AM EST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
EST 3hrly     04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      58          37          63          40          53
Temp          36 35 45 55 57 49 44 42 39 38 50 60 62 53 49 47 44 42 47 52 49 41
Dewpt         32 29 35 39 40 40 39 38 35 34 38 39 40 39 38 39 35 34 34 30 27 27
RH            85 78 68 55 53 71 82 86 85 85 63 46 44 59 66 74 70 73 60 43 42 57
Wind dir      SW  W SW SW SW SW SW SW SW SW SW SW SW  W  W  W  W  W  W  N  N NE
Wind spd       2  3  3  5  5  5  4  4  4  3  6 12 13 10  9  8  5  3  2  3  3  3
Clouds        B1 SC SC SC SC SC B1 SC SC SC FW FW FW SC SC B1 SC B1 B1 B2 B1 B1
PoP 12hr                      5           0           0           5          30
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Rain                                                                    C  C  S


Date          Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
EST 6hrly     01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Min/Max          28    46      30    52      39    58      36    50
Temp          35 31 44 38   35 34 50 46   43 42 56 47   42 38 48 43
Dewpt         25 23 25 25   25 27 35 39   39 40 46 43   38 35 34 36
PWind dir        NE     E       S     S       S    SW       N    NE
Wind char        LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    SC FW FW FW   SC SC B1 B2   B2 B2 B2 B2   B2 B2 B2 B2
PoP 12hr         20     5       5    10      40    40      40    40
Rain           S
Rain shwrs                                 C  C  C  C    C  C  C  C

$$
MDZ003-182100-
Hagerstown Airport-Washington MD
39.71N  77.73W Elev. 705 ft
1233 AM EST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
EST 3hrly     04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      49          39          56          37          43
Temp          34 34 41 48 48 43 41 41 40 40 46 54 55 50 46 43 40 38 40 42 40 35
Dewpt         31 30 33 37 39 37 37 36 36 35 37 38 38 37 36 36 29 26 23 22 21 23
RH            89 85 73 65 71 79 85 82 85 82 71 54 53 61 68 76 64 62 50 44 46 61
Wind dir       N SW SW  W SW  W SW SW SW SW SW  W  W  W  W  W  W NW NW NW NW NW
Wind spd       1  3  4  6  6  6  4  4  5  4  9 13 13 10 10  9  8  5 10  8  9  4
Clouds        OV B1 B1 B1 B1 B2 B2 B2 B2 SC SC SC FW SC SC B1 FW B1 SC B1 SC SC
PoP 12hr                      5          10           0           0           5
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Obvis         PF


Date          Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
EST 6hrly     01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Min/Max          27    41      30    47      39    53      34    45
Temp          32 29 39 36   33 33 45 43   41 41 51 44   40 36 44 40
Dewpt         22 20 21 22   23 25 32 36   37 37 43 38   32 29 30 31
PWind dir        NW    SE      SE     S       S    SW      NW     N
Wind char        LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    SC SC SC SC   SC SC B1 B2   B2 B2 B2 B2   B1 B1 B1 B2
PoP 12hr          5     0       5    20      50    50      40    40
Rain shwrs                         S  S    C  C  C  C    C  C  C  C

$$
MDZ017-182100-
Patuxent River NAS MD
38.29N  76.41W Elev. 39 ft
1233 AM EST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
EST 3hrly     04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      52          40          58          43          50
Temp          38 38 44 51 51 43 43 42 41 41 49 57 57 51 51 50 47 44 47 49 47 41
Dewpt         36 35 38 38 40 39 40 41 40 39 42 42 42 42 42 42 40 38 35 32 30 29
RH            92 89 79 61 66 86 89 96 96 92 77 57 57 71 71 74 76 79 63 52 51 62
Wind dir      SW  W  W  W SW  S SW  W  W SW SW SW SW SW  W  W NW NW NW NW NW  N
Wind spd       4  4  5  4  4  5  5  4  4  4  6 12 13 13 13 12  9  5  8  8  9  6
Clouds        B1 SC SC SC FW SC SC SC FW FW FW FW FW SC SC B1 SC B1 SC B1 B1 B1
PoP 12hr                      5           0           0           0          20
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Rain                                                                    S  S
Obvis                              PF PF


Date          Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
EST 6hrly     01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Min/Max          32    43      34    53      45    58      42    49
Temp          37 34 42 39   37 37 51 49   47 47 57 50   47 43 48 45
Dewpt         28 26 25 28   31 34 41 44   45 46 48 47   43 40 37 39
PWind dir         N    NE       E     S       S    SW      NW    NE
Wind char        GN    LT      LT    LT      GN    GN      LT    LT
Avg clouds    SC SC FW FW   FW SC B1 B2   B2 B2 B2 B2   B2 B2 B2 B2
PoP 12hr         10     5       5    10      40    50      40    40
Rain shwrs                                 C  C  C  C    C  C  C  C

$$
WVZ502-182100-
Petersburg WV
38.99N  79.15W Elev. 963 ft
1233 AM EST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
EST 3hrly     04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      51          40          59          38          45
Temp          35 34 39 49 50 44 42 41 41 40 46 57 58 50 47 45 42 39 42 44 42 37
Dewpt         31 32 34 38 39 37 37 37 35 35 37 37 37 38 38 37 32 30 26 24 23 24
RH            85 92 82 66 66 76 82 85 79 82 71 47 45 63 71 73 67 70 53 45 46 59
Wind dir       S  S SW  W  W SW  W SW SW SW  W  W  W  W  W  W  W  W  W NW NW  N
Wind spd       1  3  3  6  6  6  6  4  5  4  8 12 14 11 10  9  6  3  5  2  4  2
Clouds        B1 B2 B2 B2 B2 B2 B2 B1 SC SC SC SC FW SC SC B1 SC B1 SC B1 B1 SC
PoP 12hr                     30          20           5          10          20
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Rain                    C  C  S  S  S  S                                S  S


Date          Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
EST 6hrly     01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Min/Max          28    47      33    53      41    55      36    48
Temp          33 31 45 40   37 36 51 47   44 43 53 46   42 38 47 42
Dewpt         22 21 26 25   24 26 37 37   37 39 43 38   33 32 35 34
PWind dir         N    SE       S     S       S    SW      NW    SW
Wind char        LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    SC SC SC FW   SC SC B1 B2   B2 B2 B2 B2   B2 B1 B2 B2
PoP 12hr         10     0       5    20      50    50      40    40
Rain shwrs                         S  S    C  C  C  C    C  C  C  C

$$
MDZ014-182100-
Annapolis MD
38.99N  76.49W Elev. 7 ft
1233 AM EST Mon Dec 18 2017

Date             Mon 12/18/17            Tue 12/19/17            Wed 12/20/17
EST 3hrly     04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      50          40          58          42          48
Temp          37 36 43 48 50 45 44 43 42 41 50 56 58 53 51 48 45 43 45 47 45 40
Dewpt         37 34 36 37 39 39 38 39 38 38 41 41 41 41 40 40 37 34 29 27 26 27
RH           100 92 76 65 66 79 79 86 86 89 71 57 53 64 66 74 73 70 53 45 47 59
Wind dir       S  W  W SW SW SW SW  W  W SW SW SW SW SW  W  W  W NW NW NW NW NW
Wind spd       1  2  3  4  4  4  4  3  4  4  8 12 13 10 10  9  8  5  9 10 10  6
Clouds        B2 B1 B1 SC SC SC B1 SC SC SC FW FW FW FW SC B1 SC B1 SC B1 SC SC
PoP 12hr                      5           5           0           0          10
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Obvis                              PF PF


Date          Thu 12/21/17  Fri 12/22/17  Sat 12/23/17  Sun 12/24/17
EST 6hrly     01 07 13 19   01 07 13 19   01 07 13 19   01 07 13 19
UTC 6hrly     06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Min/Max          31    43      34    51      44    57      40    48
Temp          36 33 42 39   37 37 49 48   46 46 56 49   45 41 47 44
Dewpt         26 23 23 26   28 32 39 43   45 44 47 45   41 37 35 37
PWind dir         N    NE      SE     S       S    SW      NW    NE
Wind char        LT    LT      LT    LT      LT    GN      LT    LT
Avg clouds    SC FW SC FW   FW SC B1 B2   B2 B2 B2 B2   B2 B2 B2 B2
PoP 12hr          5     0       5    10      40    50      40    40
Rain shwrs                                 C  C  C  C    C  C  C  C

$$



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