National Weather Service United States Department of Commerce

 

***  EXPERIMENTAL - NOT FOR OPERATIONAL USE   ***

 

Experimental Surf Forecast Matrix
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What's This?
Product Description Document

 

In the tabs below you can view Surf Forecast Matrices for various beaches over the Wakefield, VA forecast area.  This product is experimental and not intended to be substituted for the official Surf Zone Forecast, which can be viewed HERE.  Additional information on this project and variable definitions can be found HERE. We are seeking feedback on this over the next several months, so please send us your input via an online survey.

The Rip Probabilities included in the matrices below are from a rip current forecast model tied to NOAA's Nearshore Wave Prediction System. This model predicts the probabilities of hazardous rip currents occurring using output from the nearshore wave model and predicted tide levels. Values are calculated from 0-100%, hourly through 144 hours.

 

 

Maryland  Beaches

Date               Fri 08/14                          Sat 08/15
EDT 3hrly          05   08   11   14   17   20   23   02   05   08   11   14   17   20

Rip Current Risk       Low  Low  Low  Low                      Mod  Mod  Mod  Mod     
Rip Probability     8    3    5   13   16    8    8   16   19   10   13   26   32   17
Surf Height (ft)    1    1    1    1    1    1    1    1    1    1    1    1    1    1
Dom Period (s)     13   12   12    9    9    9    9    9    9   10   10   10   10    5
Chance Precip       5   10   20   30   40   20   20   10    5    5    0   10   10    5
TSTM Potential   None None None  Mod  Mod  Low None None None None None None None None
Cloud Cover      Mcld Pcld Mcld Mcld Mcld Mcld Pcld Pcld Pcld Pcld Pcld Pcld Pcld Pcld
Temperature        76   77   79   78   79   76   75   75   73   75   77   78   78   76
Heat Index         80   81        82   83   80   79   79                              
Wind (mph)         W3  NE5   E7   E8   E8   E6   E3  NE5  NE7  NE8 NE10 NE10  E10   E8
Wind Gust                                                       13   15   15   15   13


Date               Sun 08/16           Mon 08/17           Tue 08/18           Wed 08/19
EDT 6hrly          02   08   14   20   02   08   14   20   02   08   14   20   02   08   14

Rip Probability    21   16   32   40   58   35   18   19   11   16   19   38   31   41   24
Surf Height (ft)    1    1    1    2    2    2    1    1    1    1    1    1    1    1    1
Dom Period (s)      6    5    5    5    5    6    5    5    9    9    9    9   11   11   10
Chance Precip       5   20   40   70   40   10   20   10    0    0    5    0    0    5    5
TSTM Potential   None None None  Mod None None  Low  Low None None None None None None None
Cloud Cover      Pcld Pcld Pcld Mcld Pcld Pcld Pcld Pcld Pcld Mclr Mclr Mclr Mclr Mclr Mclr
Temperature        74   76   79   77   77   77   83   80   76   75   78   77   74   74   79
Heat Index                                       89   85                                   
Wind (mph)        SE7  SE7  S15  S18 SW18  W12   W9   W6  NW7   N9  NE9  SE5   S5   N5  SE9
Wind Gust                    22   24   24        14                                        

 
Accomack-Northampton  Beaches

Date               Fri 08/14                          Sat 08/15
EDT 3hrly          05   08   11   14   17   20   23   02   05   08   11   14   17   20

Rip Current Risk       Low  Low  Low  Low                      Mod  Mod  Mod  Mod     
Rip Probability    11    4    6   19   20    7    9   24   28   10   10   23   31   11
Surf Height (ft)    1    1    1    1    1    1    1    1    2    2    2    2    2    2
Dom Period (s)     14   12   12   11   11    9    9    9    9   10   10   10   10    4
Chance Precip       5   10   20   40   50   30   20   10    5    5    5   10   10    5
TSTM Potential   None None None  Mod  Mod  Low  Low None None None None None None None
Cloud Cover      Pcld Pcld Mcld Mcld Mcld Mcld Pcld Pcld Pcld Pcld Pcld Pcld Pcld Pcld
Temperature        77   79   80   80   81   77   75   76   74   76   78   79   79   77
Heat Index         82   83   85   85   86        80                                   
Wind (mph)         S3   E6   E7   E7   E8  NE9  NE5  NE7  NE7  NE9 NE10 NE10  E12  E10
Wind Gust                                                            15   15        15


Date               Sun 08/16           Mon 08/17           Tue 08/18           Wed 08/19
EDT 6hrly          02   08   14   20   02   08   14   20   02   08   14   20   02   08   14

Rip Probability    21   13   40   51   75   43   26   23   16   19   17   31   23   36   17
Surf Height (ft)    2    2    2    3    2    2    2    2    2    2    2    2    2    2    2
Dom Period (s)      6    7    4    4    5    5    5    5    9    9    9    9   11   10   10
Chance Precip       5   10   30   60   30    5   30   20    0    0    5    0    0    5    5
TSTM Potential   None None None  Mod None None  Mod  Low None None None None None None None
Cloud Cover      Pcld Pcld Pcld Mcld Pcld Pcld Pcld Pcld Pcld Pcld Mclr Mclr Mclr Mclr Mclr
Temperature        76   77   80   78   78   78   85   81   77   76   79   78   75   75   80
Heat Index                                       93   88   81                              
Wind (mph)        SE8  SE7  S16  S21 SW20  W13   W9   W5  NW6   N9  NE8   E5  SE5  NE3  SE9
Wind Gust                    21   26   25                                                  

 
Virginia  Beach

Date               Fri 08/14                          Sat 08/15
EDT 3hrly          05   08   11   14   17   20   23   02   05   08   11   14   17   20

Rip Current Risk       Low  Low  Low  Low                      Mod  Mod  Mod  Mod     
Rip Probability     3    1    1    3    4    2    2    4    5    2    3    8   13    6
Surf Height (ft)    1    1    1    1    1    1    1    1    1    2    2    2    2    2
Dom Period (s)     14   12   12   11   11   10   10   10   10   10   10   10   10    5
Chance Precip       0   10   20   40   50   40   40   30   20    5   10   20   20   10
TSTM Potential   None None  Low  Mod  Mod  Mod  Low None None None None None None None
Cloud Cover      Pcld Pcld Pcld Mcld Pcld Mcld Mcld Mcld Mcld Pcld Pcld Pcld Pcld Pcld
Temperature        78   79   82   83   84   81   78   78   77   78   79   79   80   78
Heat Index         82   83   88   90   92   87   82   82                              
Wind (mph)         S7   S7   S8  SE9  E10  SE8  NE7   N7   N8  NE9 NE10 NE10 NE10  E10
Wind Gust                                                            15   15   15   15


Date               Sun 08/16           Mon 08/17           Tue 08/18           Wed 08/19
EDT 6hrly          02   08   14   20   02   08   14   20   02   08   14   20   02   08   14

Rip Probability    10    9    9    8    5    3    2    3    1    2    6    8    4    7    5
Surf Height (ft)    2    2    2    3    2    2    2    2    2    2    2    2    2    2    2
Dom Period (s)      6    5    5    5    5    5    5    8    8    8    8    8   10   10   10
Chance Precip      10   10   30   40   10    5   30   30   10   10   10    5    5    5   10
TSTM Potential   None None  Low  Mod None None  Mod  Mod None None None None None None None
Cloud Cover      Pcld Pcld Pcld Pcld Pcld Mclr Pcld Pcld Pcld Pcld Pcld Pcld Pcld Mclr Mclr
Temperature        77   78   82   81   79   79   87   84   80   79   81   80   78   78   81
Heat Index                   87   86        83   99   94   85   83   86   85   82        86
Wind (mph)         E9  SE8  S14  S16 SW16 SW13  W10   W6   W6  N10  N12  NE7   E5  NE5   E9
Wind Gust                    20                                                          14

 
Currituck  Beaches

Date               Fri 08/14                          Sat 08/15
EDT 3hrly          05   08   11   14   17   20   23   02   05   08   11   14   17   20

Rip Current Risk       Low  Low  Low  Low                      Mod  Mod  Mod  Mod     
Rip Probability     3    2    2    5    5    2    2    5    5    3    4   10   14    7
Surf Height (ft)    1    1    1    1    1    1    1    1    1    1    2    2    2    2
Dom Period (s)     14   12   12   12   12   10   10   10   10   10   10   10   10    5
Chance Precip       0   10   20   40   50   40   40   30   20   10   10   20   20   10
TSTM Potential   None None  Low  Mod  Mod  Mod  Mod  Low None None None None None None
Cloud Cover      Pcld Pcld Pcld Pcld Mcld Mcld Mcld Mcld Mcld Pcld Pcld Pcld Pcld Pcld
Temperature        78   79   81   82   84   80   78   78   78   78   79   79   80   78
Heat Index         83   83   88   90   92   86   82   82                  83   85     
Wind (mph)         S6   S7   S8   S9 SE10   S9   N8   N8   N9   N9 NE10 NE10 NE10 NE10
Wind Gust                                                                 15   15   15


Date               Sun 08/16           Mon 08/17           Tue 08/18           Wed 08/19
EDT 6hrly          02   08   14   20   02   08   14   20   02   08   14   20   02   08   14

Rip Probability    14   13   14    9    6    5    3    3    2    2    6   10    6    9    6
Surf Height (ft)    2    2    2    2    2    2    2    2    2    2    2    2    2    2    2
Dom Period (s)      6   10    5    5   10    6    8    9    9    9    9    9   11   10   10
Chance Precip      10   10   20   40   10    5   30   40   10   10   20    5    5    5   10
TSTM Potential   None None  Low  Mod None None  Mod  Mod None None  Low None None None None
Cloud Cover      Pcld Pcld Pcld Pcld Pcld Mclr Pcld Pcld Pcld Pcld Pcld Pcld Pcld Mclr Pcld
Temperature        78   79   82   81   79   79   87   84   80   79   81   81   79   79   82
Heat Index                   88   87   83        99   94   86   84   88   87   83        87
Wind (mph)         E8  SE8  S12  S14 SW14 SW13  SW9   S5   W5   N9 NE10  NE6   E5  NE5   E8
Wind Gust          13        18                  15             14   17                  14