Pismo Beach Ocean / Surf Report

7/19/2019

SEA/SWELL:

      A 3- to 5-foot northwesterly (300-degree, deep-water) swell
      (with an 8- to 10-second period) will continue at this
      level through Monday.

      A 4- to 6-foot northwesterly (320-degree, deep-water)
      sea and swell (with a 5- to 8-second period) will develop
      along our coastline on Tuesday through Thursday.

      Arriving from the Southern Hemisphere:
   
      Today's 1- to 3-foot Southern Hemisphere (210-degree, deep-
      water) swell (with a 13- to 15-second period) will remain
      at this height through tonight.

      A 1- to 2-foot Southern Hemisphere (190-degree, deep-
      water) swell (with a 15- to 17-second period) will arrive
      along our coastline on Tuesday into Thursday.
      
  ATMOSPHERIC CONDITION:

      Gentle to moderate (8 to 18 mph) northwesterly (onshore)
      winds will continue through Sunday. In response, the marine
      layer will become persistent during the afternoon hours
      along our coastline with a "no-sky July" condition
      possible along many of the beaches over this time frame.

      Today's high temperatures will reach the low-80s in the
      North County (Paso Robles) and low 70s in the coastal
      valleys (San Luis Obispo). The beaches will remain in
      the 60s.

      A warm ridge of high pressure will begin to nudge
      westward toward the Central Coast this weekend,
      bringing a warming trend with temperatures approaching
      seasonable readings in the inland valleys. The inland
      valley temperatures (Paso Robles) will continue to rise,
      reaching triple-digit levels by Tuesday and Wednesday.

      Note: Monsoonal flow may creep up the Sierra Nevada starting
            Saturday afternoon, allowing for isolated afternoon
            thunderstorms confined to high terrain.
      
      There is a chance that monsoonal moisture will rotate into
      the Central Coast by the first week August. This subtropical
      moisture will produce variable mid to high-level clouds
      with warmer overnight lows and cooler daytime highs in
      the inland and coastal valleys. Higher humidity levels and
      a chance of rain shower and thunderstorms may also develop.

      The stretch of warm summertime weather could last through
      the remainder of the month with no immediate signs of extreme
      heat seen at this time.

   WILDFIRE INDEX RATINGS:

      The PG&E Fire Index Ratings will remain at medium levels
      along the Coastline, Coastal and Inland valleys today,
      Saturday and Sunday.

      The Far Inland areas will remain at high to very high
      level today, Saturday and Sunday.

         Yesterday's          Today's           Tomorrow's
         Min    Max         Min    Max         Min     Max
        54.2°   62.8°      54.3°   62.0°      54.0°    62.0°

   PG&E Weather Office in San Francisco predicted temperatures
   for San Luis Obispo County

    Inland Temperatures, Paso Robles

   Actual                    Predicted
           
     Thu     Fri     Sat    Sun    Mon    Tue     Wed    Thu    Fri
    51 87   55 82   53 83  52 90  53 96  57 101 59 103  62 100 60 101           
                                         
   Coastal Valleys Temperatures, San Luis Obispo
         
     Thu     Fri     Sat    Sun    Mon    Tue     Wed    Thu    Fri
    53 75   56 72   55 72  55 71  53 75  53 74   54 78  55 82  56 81         
                        
  WINDS:

     Gentle to moderate (8 to 18 mph) southwesterly to northwesterly
     winds are forecast today into Monday.

     Moderate to fresh (13 to 24 mph) northwesterly winds are
     forecast on Monday, increasing to fresh to strong (19 to 31 mph)
     levels on Tuesday and Wednesday.

  DIABLO CANYON METEOROLOGICAL TOWER WIND DATA:

     Last night's Maximum Winds:
 
        Max peak winds:       NW         10.0 mph @   6:15 a.m.
        Max sustained wind:   NW          7.0 mph @   6:15 a.m.

     Yesterday's Maximum Winds:
           
        Max peak winds:       NW         18.0 mph @   8:00 p.m.
        Max sustained wind:   NW         15.0 mph @   8:00 p.m.

  SEAWATER TEMPERATURES:
 
     Intake seawater temperatures will range between 53 and 56
     degrees through today, gradually increasing on Saturday
     through Monday.
     
  OCEAN CURRENTS:

     A pattern of a northerly (onshore) flowing current developing
     during the night and morning, becoming a southerly (offshore)
     flowing current during the afternoon will start today and
     will continue through Monday.

     A southerly (offshore) flowing current is forecast on Tuesday
     through Thursday.
        
  SEAWATER VISIBILITY:

     Seawater visibility was 15 to 17 feet at the Diablo Canyon Marina.

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24-Hour Ocean Condition Outlook for Friday 07/19 to Saturday 07/20

  SWELL:            DIR. NW      HT.  2-4   PER.  8-10  This morning
  Increasing to:    DIR. NW      HT.  3-5   PER.  8-10  This afternoon
  Remaining  at:    DIR. NW      HT.  3-5   PER.  8-10  Tonight

 (Combined with:    DIR. SW      HT.  2-4   PER. 13-15  All day)
 
  WINDS:            DIR. NW      SPEED  5-10            This morning
  Increasing to:    DIR. NW      SPEED 10-15            This afternoon
  Decreasing to:    DIR. NW      SPEED  5-10            Tonight
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48-Hour Ocean Condition Outlook for Saturday 07/20 to Sunday 07/21
    
  SWELL:            DIR. NW      HT.  3-5   PER.  8-10  Saturday morning
  Remaining  at:    DIR. NW      HT.  3-5   PER.  8-10  Saturday afternoon
  Remaining  at:    DIR. NW      HT.  3-5   PER.  8-10  Saturday night
 
  WINDS:            DIR. SW      SPEED  5-10            Saturday morning
  Increasing to:    DIR. NW      SPEED 10-15            Saturday afternoon
  Decreasing to:    DIR. NW      SPEED  5-10            Saturday night
==========================================================================

Extended Ocean Condition Outlook:

      A 4- to 6-foot northwesterly (320-degree, deep-water)
      sea and swell (with a 5- to 8-second period) will develop
      along our coastline on Tuesday and Wednesday.
 
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