National Weather Service United States Department of Commerce

Atmospheric River to Begin to Impact the Northwest U.S.; Gusty Winds in the Northeast U.S.

A strong atmospheric river moving into northern California later Tuesday will bring a threat for moderate to heavy rainfall and flooding, gusty to high winds, and mountain snows for parts of the Northwest U.S. through at least Wednesday. Gusty winds and isolated rain and snow showers will continue in the Northeast U.S. Tuesday behind a cold front. Read More >

Philadelphia/Mt Holly

Weather Forecast Office

Philadelphia, PA/Mt. Holly, NJ Surf Forecast Matrix

Weather.gov > Philadelphia/Mt Holly > Philadelphia, PA/Mt. Holly, NJ Surf Forecast Matrix

 

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

 

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

 

In the tabs below you can view Surf Forecast Matrices for various beaches over the Philadelphia/Mt Holly 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.

 

 

Eastern  Monmouth 

Date               Tue 09/30                          Wed 10/01
EDT 3hrly          05   08   11   14   17   20   23   02   05   08   11   14   17   20

Rip Current Risk High High High High High High High High High High High High High High
Rip Probability    MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Surf Height (ft)    2    2    2    2    2    3    3    3    3    3    3    3    3    3
Dom Period (s)     MM   MM   MM   MM   MM    0    0    0    0    0    0    0    0    0
Chance Precip       5    0    0    0    0    0    0    0    0    0    0    0    0    0
TSTM Potential   None None None None None None None None None None   MM   MM   MM None
Cloud Cover       Cld Mcld Mcld Mcld Mcld Pcld Pcld Pcld Mclr  Clr Mclr Mclr Mclr Mclr
Temperature        67   68   72   74   74   72   69   67   63   60   62   64   66   64
Heat Index                                                                            
Wind (mph)        N 3  N 7 N 10NE 10 E 12NE 14NE 18NE 21NE 23NE 22NE 22 N 17 N 17 N 14
Wind Gust               12        15   17   21   24   29   31   30   29   24   24   25


Date               Thu 10/02           Fri 10/03           Sat 10/04           Sun 10/05
EDT 6hrly          02   08   14   20   02   08   14   20   02   08   14   20   02   08   14

Rip Probability    MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Surf Height (ft)    3    3    2    2    2    2    2    2    2    2    1    1    1    1    1
Dom Period (s)     MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Chance Precip       0    0    5    0    0    0    0    0    0    0    0    0    0    0    0
TSTM Potential   None None   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Cloud Cover      Mclr Mclr Mclr Pcld Pcld Pcld Pcld Pcld Mclr  Clr Mclr Mclr Mclr Mclr Mclr
Temperature        60   58   61   61   59   57   65   65   61   59   71   68   64   62   73
Heat Index                                                                                 
Wind (mph)      NE 16NE 15NE 10  E 7 SE 5 NW 5  S 5  S 7 SW 7  W 7 SW 6 SW 7  W 7  W 6 SW 6
Wind Gust          26   25   22   12                  12   12   12   12   12   13

 
Coastal  Ocean 

Date               Tue 09/30                          Wed 10/01
EDT 3hrly          05   08   11   14   17   20   23   02   05   08   11   14   17   20

Rip Current Risk High High High High High High High High High High High High High High
Rip Probability    MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Surf Height (ft)    1    1    2    2    2    2    2    2    3    2    2    2    2    2
Dom Period (s)     MM   MM   MM   MM   MM    0    0    0    0    0    0    0    0    0
Chance Precip       5    5    0    0    0    0    0    0    0    0    0    0    0    0
TSTM Potential   None None None None None None None None None None   MM   MM   MM None
Cloud Cover       Cld Mcld Mcld Mcld Mcld Pcld Pcld Pcld Pcld Mclr Mclr Mclr Mclr Mclr
Temperature        68   68   72   73   73   71   70   68   65   63   64   65   65   64
Heat Index                                                                            
Wind (mph)        N 8  N 9NE 13NE 15NE 17NE 20NE 23NE 26NE 28NE 26NE 28NE 24NE 23NE 18
Wind Gust                         20   23   26   30   32   34   34   36   31   31   26


Date               Thu 10/02           Fri 10/03           Sat 10/04           Sun 10/05
EDT 6hrly          02   08   14   20   02   08   14   20   02   08   14   20   02   08   14

Rip Probability    MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Surf Height (ft)    2    2    2    2    1    1    1    1    1    1    1    1    1    1    1
Dom Period (s)     MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Chance Precip       0    0    5    0    0    0    0    0    0    0    0    0    0    0    0
TSTM Potential   None None   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Cloud Cover      Mclr Mclr Pcld Pcld Pcld Pcld Pcld Pcld Mclr  Clr  Clr Mclr Mclr Mclr Mclr
Temperature        62   60   63   61   60   58   65   64   61   59   70   67   64   62   73
Heat Index                                                                                 
Wind (mph)      NE 20NE 18NE 16 E 12  E 7  N 6  S 7  S 8 SW 8  W 7 SW 9SW 10 SW 8  W 7  S 9
Wind Gust          26   25   24

 
Coastal  Atlantic 

Date               Tue 09/30                          Wed 10/01
EDT 3hrly          05   08   11   14   17   20   23   02   05   08   11   14   17   20

Rip Current Risk High High High High High High High High High High High High High High
Rip Probability    MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Surf Height (ft)    2    2    3    3    3    2    3    3    3    3    3    4    4    3
Dom Period (s)     MM   MM   MM   MM   MM    0    0    0    0    0    0    0    0    0
Chance Precip       5    5    5    0    0    0    0    0    0    0    0    0    0    0
TSTM Potential   None None None None None None None None None None   MM   MM   MM None
Cloud Cover       Cld Mcld Mcld Mcld Mcld Mcld Pcld Pcld Pcld Pcld Pcld Mclr Mclr Mclr
Temperature        68   68   71   73   72   71   70   68   66   64   65   64   64   64
Heat Index                                                                            
Wind (mph)       NE 8NE 10NE 12NE 15NE 16NE 18NE 21NE 23NE 24NE 23NE 25NE 23NE 21NE 16
Wind Gust          13   15   17   21   24   26   30   32   34   34   36   32   31   26


Date               Thu 10/02           Fri 10/03           Sat 10/04           Sun 10/05
EDT 6hrly          02   08   14   20   02   08   14   20   02   08   14   20   02   08   14

Rip Probability    MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Surf Height (ft)    3    2    2    2    2    2    2    2    1    2    1    2    1    1    1
Dom Period (s)     MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Chance Precip       0    0    5    0    0    0    0    0    0    0    0    0    0    0    0
TSTM Potential   None None   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Cloud Cover      Mclr Pcld Pcld Pcld Pcld Pcld Pcld Pcld Mclr Mclr  Clr Mclr Mclr Mclr Mclr
Temperature        61   60   63   61   60   59   65   63   61   60   69   66   64   63   72
Heat Index                                                                                 
Wind (mph)      NE 16NE 15NE 16 E 10  E 7 NE 6 SE 7  S 6 SW 6  W 6 SW 8 SW 8 SW 6  W 6 SW 8
Wind Gust          25   25   25   15

 
Atlantic  Coastal  Cape  May 

Date               Tue 09/30                          Wed 10/01
EDT 3hrly          05   08   11   14   17   20   23   02   05   08   11   14   17   20

Rip Current Risk High High High High High High High High High High High High High High
Rip Probability    MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Surf Height (ft)    2    2    2    2    2    2    2    3    3    3    2    3    3    2
Dom Period (s)     MM   MM   MM   MM   MM    0    0    0    0    0    0    0    0    0
Chance Precip       5    5    5    5    0    0    0    0    0    0    0    0    0    0
TSTM Potential   None None None None None None None None None None   MM   MM   MM None
Cloud Cover       Cld Mcld  Cld Mcld Mcld Mcld Pcld Pcld Pcld Pcld Pcld Mclr Mclr Mclr
Temperature        68   68   71   73   73   71   70   68   66   64   66   66   65   64
Heat Index                                                                            
Wind (mph)       NE 8NE 10NE 13NE 14NE 16NE 17NE 21NE 23NE 24 N 23NE 24NE 22NE 21NE 16
Wind Gust          14   16        20   23   25   29   33   34   34   34   31   30   26


Date               Thu 10/02           Fri 10/03           Sat 10/04           Sun 10/05
EDT 6hrly          02   08   14   20   02   08   14   20   02   08   14   20   02   08   14

Rip Probability    MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Surf Height (ft)    2    2    2    2    2    2    2    1    2    2    1    2    1    2    1
Dom Period (s)     MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Chance Precip       0    0    5    0    0    0    0    0    0    0    0    0    0    0    0
TSTM Potential   None None   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Cloud Cover      Mclr Pcld Pcld Pcld Pcld Pcld Pcld Pcld Mclr Mclr Mclr Mclr Mclr Mclr Mclr
Temperature        60   60   64   62   60   59   65   63   62   61   69   67   64   64   72
Heat Index                                                                                 
Wind (mph)      NE 15NE 15NE 16 E 12  E 7 NE 6 SE 6  S 6 SW 5  W 5 SW 7  S 7 SW 6  W 5 SW 7
Wind Gust          26   25   25        12                                 12

 
Delaware  Beaches 

Date               Tue 09/30                          Wed 10/01
EDT 3hrly          05   08   11   14   17   20   23   02   05   08   11   14   17   20

Rip Current Risk High High High High High High High High High High High High High High
Rip Probability    MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Surf Height (ft)    2    2    2    2    2    2    3    3    3    3    3    3    3    3
Dom Period (s)     MM   MM   MM   MM   MM    0    0    0    0    0    0    0    0    0
Chance Precip       0    5    5    5    5    0    0    0    0    0    0    0    0    0
TSTM Potential   None None None None None None None None None None   MM   MM   MM None
Cloud Cover       Cld Mcld  Cld  Cld Mcld  Cld Pcld Pcld Pcld Pcld Pcld Pcld Mclr Mclr
Temperature        70   70   72   72   73   72   71   70   69   66   66   66   66   65
Heat Index                                                                            
Wind (mph)      NE 12NE 14NE 15NE 15NE 18NE 21NE 23NE 26NE 28NE 26NE 26NE 25NE 24NE 20
Wind Gust                    21   21   24   28   31   34   36   36   34   32   32   29


Date               Thu 10/02           Fri 10/03           Sat 10/04           Sun 10/05
EDT 6hrly          02   08   14   20   02   08   14   20   02   08   14   20   02   08   14

Rip Probability    MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Surf Height (ft)    3    3    3    3    3    2    2    2    2    2    2    2    2    2    2
Dom Period (s)     MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Chance Precip       0    0    5    0    0    0    0    0    0    0    0    0    0    0    0
TSTM Potential   None None   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM   MM
Cloud Cover      Mclr Pcld Pcld Pcld Pcld Pcld Pcld Pcld Mclr Mclr Mclr Mclr Mclr Mclr Mclr
Temperature        63   63   64   63   62   61   65   64   62   61   69   67   63   63   72
Heat Index                                                                                 
Wind (mph)      NE 18NE 17NE 17 E 14  E 9 NE 7  E 8 SE 6 SW 5  W 6  S 7  S 7 SW 6  W 5  S 7
Wind Gust          28   26   25

 
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