Point Forecast Matrices
Issued by NWS Charleston, SC

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Point Forecast Matrices
National Weather Service Charleston SC
327 PM EDT Mon Aug 21 2017

SCZ050-220900-
Charleston International Airport-Charleston SC
32.91N  80.03W Elev. 45 ft
327 PM EDT Mon Aug 21 2017

Date           08/21/17      Tue 08/22/17            Wed 08/23/17            Thu
EDT 3hrly     17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      76          89          76          91          76
Temp          84 82 79 77 77 78 86 89 87 82 79 77 77 78 87 91 89 82 80 78 77 77
Dewpt         76 76 76 75 75 75 76 75 75 75 75 75 74 75 75 75 75 76 76 76 76 75
RH            77 82 91 94 94 91 72 64 68 79 88 94 90 91 68 60 64 82 88 94 97 94
Wind dir      SE SE SE SE  E  N SW  S  S  S  S SW SW SW SW SW  S  S  S SW SW  W
Wind spd       8  4  2  1  1  1  3  6  9  6  4  4  3  3  5  6  8  8  6  4  4  3
Clouds        B1 B1 B1 B1 B1 B1 B2 B1 B1 B1 SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1
PoP 12hr                     20          30          30          40          40
QPF 12hr                      0        0.11           0        0.10        0.26
Snow 12hr                 00-00       00-00       00-00
Rain shwrs     C  S           S  S  C  C  S  S     S  C  C  C  C  C  C  C  C  L
Tstms          C  S           S  S  C  C  S  S     S  C  C  C  C  C  C  C  C  L
Heat index    93                96 99 96                96102 99
Max heat         97                99    99               102   102
Coast Flood       Y


Date           08/24  Fri 08/25/17  Sat 08/26/17  Sun 08/27/17  Mon 08/28/17
EDT 6hrly     14 20   02 08 14 20   02 08 14 20   02 08 14 20   02 08 14 20
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          89      73    86      71    87      70    85      72    86
Temp          89 80   75 75 85 78   73 73 86 78   72 72 84 78   74 74 85 80
Dewpt         75 75   73 73 74 73   71 69 67 67   65 66 65 67   67 69 71 72
PWind dir         W      NE    NE      NE    NE      NE    NE      NE    NE
Wind char        LT      LT    LT      LT    GN      LT    GN      GN    GN
Avg clouds    B1 B2   OV B2 B2 B2   B1 SC SC SC   SC SC SC SC   SC SC SC SC
PoP 12hr         60      50    40      20    20      10    20      20    10
Rain shwrs     L  L    C  C  C  C    S  S  S  S          S  S    S  S
Tstms          L  L    C  C  C  C    S  S  S  S          S  S    S  S

$$
GAZ118-220900-
Savannah International Airport-Inland Chatham GA
32.12N  81.20W Elev. 50 ft
327 PM EDT Mon Aug 21 2017

Date           08/21/17      Tue 08/22/17            Wed 08/23/17            Thu
EDT 3hrly     17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      75          90          76          92          76
Temp          84 83 78 77 76 77 87 90 87 82 78 78 76 77 87 91 91 83 80 78 77 77
Dewpt         75 76 75 75 75 75 75 74 74 75 74 74 74 75 75 74 74 75 75 75 75 75
RH            74 80 91 94 97 94 68 60 65 79 88 88 94 94 68 58 58 77 85 91 94 94
Wind dir      SE SE  E  E NE  N  S  S  S  S  S SW SW SW SW  S  S  S  S SW SW SW
Wind spd       9  4  3  1  1  1  3  6  8  6  4  3  2  3  4  5  6  6  5  4  3  3
Clouds        B1 B2 B1 SC SC B1 B2 B2 B1 B1 B1 SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1
PoP 12hr                     20          30          30          40          40
QPF 12hr                      0        0.19           0        0.12        0.16
Snow 12hr                 00-00       00-00       00-00
Rain shwrs     C  S              S  C  C  S  S     S  C  C  C  C  C  C  C  C  L
Tstms          C  S              S  C  C  S  S     S  C  C  C  C  C  C  C  C  L
Heat index    92 91             96 99 95                96101101 90
Max heat         95               101    98               101   102


Date           08/24  Fri 08/25/17  Sat 08/26/17  Sun 08/27/17  Mon 08/28/17
EDT 6hrly     14 20   02 08 14 20   02 08 14 20   02 08 14 20   02 08 14 20
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          90      74    88      72    88      70    87      71    88
Temp          90 82   76 76 86 80   74 74 86 79   73 72 86 79   74 74 87 81
Dewpt         75 75   74 74 74 74   72 71 68 69   67 66 64 66   66 66 69 72
PWind dir        SW      NE    NE      NE    NE      NE    NE      NE    NE
Wind char        LT      LT    LT      LT    GN      LT    GN      LT    GN
Avg clouds    B1 B2   B2 B2 B2 B2   B1 B1 SC SC   SC SC SC SC   SC SC SC SC
PoP 12hr         60      50    50      20    20      10    20      10    10
Rain shwrs     L  L    C  C  C  C    S  S  S  S          S  S
Tstms          L  L    C  C  C  C    S  S  S  S          S  S

$$
SCZ050-220900-
Charleston Waterfront-Charleston SC
32.78N  79.94W Elev. 10 ft
327 PM EDT Mon Aug 21 2017

Date           08/21/17      Tue 08/22/17            Wed 08/23/17            Thu
EDT 3hrly     17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      78          88          78          90          78
Temp          83 83 81 79 79 79 85 88 86 82 80 79 78 79 86 89 88 82 81 79 78 79
Dewpt         76 76 76 76 76 76 76 75 75 75 75 75 75 75 76 76 76 76 76 77 76 76
RH            80 80 85 91 91 91 75 66 70 79 85 88 91 88 72 66 68 82 85 94 94 91
Wind dir      SE SE  S  S SW  W SW  S  S  S  S SW SW SW SW  S  S  S SW SW SW  W
Wind spd      10  5  3  2  1  1  3  8 10  9  6  5  5  5  6  9 10  9  9  8  6  4
Clouds        B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1
PoP 12hr                     20          30          30          40          40
QPF 12hr                   0.02        0.12           0        0.08        0.25
Snow 12hr                 00-00       00-00       00-00
Rain shwrs     C  S  S     S  S  S  C  S  S  S  S  S  C  C  C  C  C  C  C  C  L
Tstms          C  S  S     S  S  S  C  S  S  S  S  S  C  C  C  C  C  C  C  C  L
Heat index    91 91             94 98 95                96100 99
Max heat         96                98    98               100   100
Coast Flood       Y


Date           08/24  Fri 08/25/17  Sat 08/26/17  Sun 08/27/17  Mon 08/28/17
EDT 6hrly     14 20   02 08 14 20   02 08 14 20   02 08 14 20   02 08 14 20
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          88      75    86      73    86      72    85      74    86
Temp          88 81   77 76 85 79   75 75 85 79   75 74 84 79   76 76 86 81
Dewpt         76 76   75 74 74 74   73 70 67 68   67 67 66 68   68 70 71 73
PWind dir        SW       E    NE      NE    NE      NE    NE      NE    NE
Wind char        LT      LT    GN      GN    GN      GN    GN      GN    GN
Avg clouds    B1 B2   OV OV B2 B2   B1 B1 SC SC   SC SC SC SC   SC SC SC SC
PoP 12hr         60      50    40      20    20      20    20      20    10
Rain shwrs     L  L    C  C  C  C    S  S  S  S    S  S  S  S    S  S
Tstms          L  L    C  C  C  C    S  S  S  S    S  S  S  S    S  S

$$
SCZ048-220900-
Beaufort Marine Corps Air Station-Beaufort SC
32.48N  80.72W Elev. 37 ft
327 PM EDT Mon Aug 21 2017

Date           08/21/17      Tue 08/22/17            Wed 08/23/17            Thu
EDT 3hrly     17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      77          89          76          91          76
Temp          83 83 79 78 77 78 87 89 87 81 78 77 77 77 87 91 90 83 81 79 77 78
Dewpt         76 76 76 76 76 76 75 75 75 75 75 75 75 75 75 75 75 75 76 76 76 75
RH            80 80 91 94 97 94 68 64 68 82 91 94 94 94 68 60 62 77 85 91 97 91
Wind dir      SE SE SE SE  E  N  S  S  S  S  S SW SW SW SW SW  S  S  S SW SW SW
Wind spd       6  4  2  1  1  1  2  5  6  5  4  3  3  4  5  5  6  6  5  5  4  3
Clouds        B1 B1 B1 B1 B1 B1 B2 B1 B1 B1 B1 SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1
PoP 12hr                     20          30          30          40          40
QPF 12hr                      0        0.18           0        0.11        0.18
Snow 12hr                 00-00       00-00       00-00
Rain shwrs     C  S           S  S  C  C  S  S  S  S  C  C  C  C  C  C  C  C  L
Tstms          C  S           S  S  C  C  S  S  S  S  C  C  C  C  C  C  C  C  L
Heat index    91 91             96 99 96                96102101 90
Max heat         96                99    99               102   102
Coast Flood       Y


Date           08/24  Fri 08/25/17  Sat 08/26/17  Sun 08/27/17  Mon 08/28/17
EDT 6hrly     14 20   02 08 14 20   02 08 14 20   02 08 14 20   02 08 14 20
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          89      74    86      72    87      71    87      71    87
Temp          89 81   76 75 85 79   74 74 85 78   73 73 86 79   74 74 86 80
Dewpt         75 75   74 74 73 73   72 70 66 68   67 65 64 67   67 68 69 72
PWind dir        SW      NE    NE      NE    NE      NE    NE      NE    NE
Wind char        LT      LT    GN      LT    GN      LT    GN      GN    GN
Avg clouds    B1 B2   B2 B2 B2 B2   B1 SC SC SC   SC SC SC SC   SC SC SC SC
PoP 12hr         60      50    40      20    20      10    20      10    10
Rain shwrs     L  L    C  C  C  C    S  S  S  S          S  S
Tstms          L  L    C  C  C  C    S  S  S  S          S  S

$$
SCZ043-220900-
Walterboro-Inland Colleton SC
32.91N  80.67W Elev. 98 ft
327 PM EDT Mon Aug 21 2017

Date           08/21/17      Tue 08/22/17            Wed 08/23/17            Thu
EDT 3hrly     17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      75          91          75          92          75
Temp          86 83 78 75 75 77 87 90 89 81 78 76 75 77 87 92 90 82 79 77 76 76
Dewpt         75 75 75 75 75 75 75 74 74 75 74 74 74 74 75 73 74 75 75 75 75 74
RH            70 77 91100100 94 68 60 61 82 88 94 97 90 68 54 60 79 88 94 97 94
Wind dir      SE SE SE  E  E NE  W  S  S  S  S SW SW SW SW SW  S  S  S SW SW SW
Wind spd       6  3  2  1  1  1  2  4  5  5  3  3  2  3  4  4  5  5  4  3  3  2
Clouds        B1 B1 SC SC B1 B1 B2 B2 B1 B1 SC SC SC SC B1 B1 B1 B1 SC B1 B1 B1
PoP 12hr                     20          30          30          40          40
QPF 12hr                      0        0.13           0        0.14        0.24
Snow 12hr                 00-00       00-00       00-00
Rain shwrs     C  S              S  C  C  S  S     S  C  C  C  C  C  C  C  C  L
Tstms          C  S              S  C  C  S  S     S  C  C  C  C  C  C  C  C  L
Heat index    95 90             96 99 98                96101 99
Max heat         96                99   101               101   101


Date           08/24  Fri 08/25/17  Sat 08/26/17  Sun 08/27/17  Mon 08/28/17
EDT 6hrly     14 20   02 08 14 20   02 08 14 20   02 08 14 20   02 08 14 20
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          89      72    87      69    87      68    86      69    87
Temp          89 80   74 74 85 78   72 71 85 77   71 71 85 78   72 72 86 79
Dewpt         74 74   72 72 72 71   70 68 64 66   64 64 63 66   65 67 69 71
PWind dir         W      NE    NE      NE    NE      NE    NE      NE    NE
Wind char        LT      LT    LT      LT    LT      LT    GN      LT    LT
Avg clouds    B1 B2   B2 B2 B2 B1   B1 SC SC SC   SC SC SC SC   SC SC SC SC
PoP 12hr         60      50    30      20    20      10    10      10    10
Rain shwrs     L  L    C  C  C  C    S  S  S  S
Tstms          L  L    C  C  C  C    S  S  S  S

$$
GAZ099-220900-
Metter-Candler GA
32.40N  82.06W Elev. 197 ft
327 PM EDT Mon Aug 21 2017

Date           08/21/17      Tue 08/22/17            Wed 08/23/17            Thu
EDT 3hrly     17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      74          92          75          94          75
Temp          87 83 77 76 75 75 88 92 91 83 79 77 75 76 87 93 93 84 79 78 76 76
Dewpt         74 75 74 74 74 74 75 73 74 75 75 75 73 75 75 73 73 75 75 75 74 75
RH            65 77 90 94 97 97 66 54 58 77 88 94 94 97 68 52 52 74 88 91 94 97
Wind dir      SE SE SE SE SE SE  S  S  S  S  S  S SW SW  W SW SW  S  S SW SW  W
Wind spd       8  3  2  1  1  1  2  4  4  3  3  3  2  3  4  3  4  3  4  3  3  2
Clouds        B1 B1 B1 B1 B1 B1 B1 B2 B2 B1 B1 SC SC SC B1 B1 B1 B1 B1 B1 B1 B1
PoP 12hr                     20          30          30          40          30
QPF 12hr                      0        0.10           0        0.13        0.14
Snow 12hr                 00-00       00-00       00-00
Rain shwrs     C  S                 S  C  S  S     S  C  C  C  C  C  C  C  C  C
Tstms          C  S                 S  C  S  S     S  C  C  C  C  C  C  C  C  C
Obvis                     PF PF
Heat index    95 90             98101101 90             96102102 92
Max heat         99               102   101               102   103


Date           08/24  Fri 08/25/17  Sat 08/26/17  Sun 08/27/17  Mon 08/28/17
EDT 6hrly     14 20   02 08 14 20   02 08 14 20   02 08 14 20   02 08 14 20
UTC 6hrly     18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18 00

Max/Min          91      73    87      71    88      69    88      70    89
Temp          91 81   76 75 86 79   73 73 87 78   72 71 86 78   73 72 87 80
Dewpt         74 75   74 73 73 74   72 70 66 67   66 64 62 64   64 66 68 70
PWind dir         W      NE    NE      NE    NE      NE    NE      NE    NE
Wind char        LT      LT    LT      LT    LT      LT    GN      LT    GN
Avg clouds    B1 B2   B2 B2 B2 B1   B1 SC SC SC   SC SC SC SC   SC SC SC SC
PoP 12hr         50      40    30      20    10      10    10      10    10
Rain shwrs     C  C    C  C  C  C    S  S
Tstms          C  C    C  C  C  C    S  S

$$

PRODUCT KEY...

--- Cloud Cover ---
CODE   PERCENTAGE            SKY COVER DAY/NIGHT
 CL    0 TO <=5 percent      Sunny/Clear
 FW    >5 TO <=25 percent    Sunny/Mostly Clear
 SC    >25 TO <=50 percent   Partly Cloudy
 B1    >50 TO <=69 percent   Mostly Cloudy
 B2    >69 TO <=87 percent   Mostly Cloudy
 OV    >87 TO 100 percent    Cloudy

--- Obstructions to Visibility ---    --- Weather Coverage ---
CODE   TYPE                           CODE   QUALIFYING TERM
 F     Fog                             S     Slight
 PF    Patchy Fog                      C     Chance
 F+    Dense Fog                       L     Likely
 PF+   Patchy Dense Fog                O     Occasional
 H     Haze                            D     Definite
 BS    Blowing Snow
 K     Smoke
 BD    Blowing Dust
 AF    Volcanic Ashfall

--- Extended Wind Forecast Character ---
                           12-HR MAX SUSTAINED
CODE   WIND CHARACTER          WIND SPEED
 LT    Light                   < 8 mph
 GN    Gentle                  8-14 mph
 BZ    Breezy                  15-22 mph
 WY    Windy                   23-30 mph
 VW    Very Windy              31-39 mph
 SD    Strong/Damaging         >=40 mph

$$




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