Pismo Beach Ocean / Surf Report

6/19/2019

  SEA/SWELL:

      Today's 3- to 5-foot northwesterly (300-degree, deep-
      water) swell (with an 8- to 12-second period) will
      remain at this level through Thursday morning,
      increasing to 6 to 8 feet (with an 8- to 11-second
      period) on Thursday afternoon and will remain at this
      height through Saturday morning.

      This northwesterly (300-degree, deep-water) swell
      will lower to 4- to 6-feet (with an 8- to 11-second
      period) on Saturday afternoon into Monday morning.

      Increasing northwesterly winds Monday afternoon through
      Wednesday will generate a 6- to 8-foot northwesterly
      (320-degree, deep-water) sea and swell (with a 5- to
      11-second period) over the time frame.

      Arriving from the Southern Hemisphere:

      This morning's 2- to 4-foot Southern Hemisphere
      (220-degree, deep-water) swell (with a 15- to 17-
      second period) will remain at this level through
      tonight.  

      A 1- to 3-foot Southern Hemisphere (200-degree, deep-
      water) swell (with a 16- to 18-second period) will
      arrive on Thursday into Saturday.  

  ATMOSPHERIC CONDITION:
 
      Gentle to moderate (8 to 18 mph) southerly
      to northwesterly (onshore) winds today through
      Thursday will continue to produce persistent marine
      low clouds with areas of fog and mist/drizzle in the
      coastal regions. The marine layer will clear by
      the afternoon in the coastal valleys, but will
      remain overcast along the beaches throughout the
      day.    
 
      Today's high temperatures will reach the low to mid-
      80s in the North County (Paso Robles), while the
      coastal valleys (San Luis Obispo) will range between
      the low to mid-70s. The beaches will warm to the
      low-60s.

      An upper-level low-pressure system is expected to
      move through the Central Coast on Thursday
      into Friday with slightly stronger northwesterly
      (onshore) winds and night and morning drizzle along
      the coastline.

      In fact, the drizzle may be heavy enough to be
      measurable (one or two hundreds of an inch) in
      many of our beach communities. This system
      will also produce cooler weather with Paso Robles
      only reaching the mid to high-70s and San Luis
      Obispo the low-70s.

      High-pressure will build over the Central Coast on
      Saturday into Sunday for warmer inland and coastal
      valley temperatures, but the marine layer will
      continue to persist in the coastal regions.

      A change in the weather pattern will occur on Monday
      into next Wednesday as fresh to strong (19 to 31 mph)
      northwesterly winds develop along the coastline.
      These winds should be strong enough to mix out the
      marine layer, leaving behind sunny skies along many
      of the beaches. Overall, temperatures should remain
      seasonably cool with no clear signs of any heat waves
      through the end of June or longer.

  WILDFIRE INDEX RATINGS:

      Today's PG&E Fire Index Ratings are at medium levels
      along the coastline and coastal valleys, while the
      inland valleys are at high levels.

      The PG&E Fire Index Ratings will lower to low levels
      along the coastline and coastal valleys and medium
      levels in the inland valleys on Thursday.   

   Weather graphics and power outage information are available
   at: twitter.com/pge_john.
 
         Yesterday's          Today's           Tomorrow's
         Min    Max         Min    Max         Min     Max
        55.5°   61.1°      55.3°   60.0°       55.0°    60.0°
 
   PG&E Weather Office in San Francisco predicted temperatures
   for San Luis Obispo County
 
    Inland Temperatures, Paso Robles

   Actual                    Predicted
         
     Tue     Wed     Thu    Fri    Sat    Sun    Mon    Tue    Wed
    51 92   54 85   58 76  50 79  51 84  51 84  49 78  48 75  47 77       
                                         
   Coastal Valleys Temperatures, San Luis Obispo
         
     Tue     Wed     Thu    Fri    Sat    Sun    Mon    Tue    Wed
    53 72   57 72   58 72  54 70  54 71  52 72  52 66  52 67  53 70       
 
  WINDS:

     Gentle to moderate (8 to 18 mph) southerly to northwesterly
     (onshore) winds are forecast later today through Thursday.

     Moderate to fresh (13 to 24 mph) afternoon northwesterly winds
     are forecast on Friday and Saturday, decreasing on Sunday.

     Fresh to strong (19 to 31 mph) northwesterly winds are expected
     on Monday into next Wednesday.

  DIABLO CANYON METEOROLOGICAL TOWER WIND DATA:
 
     Last night's Maximum Winds:
 
        Max peak winds:       SE         10.0 mph @   4:45 a.m.
        Max sustained wind:   SE          8.0 mph @   4:45 a.m.
 
     Yesterday's Maximum Winds:
           
        Max peak winds:       NW         14.0 mph @  11:45 a.m.
        Max sustained wind:   NW          9.0 mph @  11:45 a.m.
 
  SEAWATER TEMPERATURES:
 
     Intake seawater temperatures will range between 54 and 57
     degrees though today, increasing to 56 to 59 degrees on
     Thursday into Sunday.
     
  OCEAN CURRENTS:

     A southerly (offshore) flowing current will develop during
     the afternoon, shifting to the north (onshore) during
     the night and morning. This pattern will continue into
     Sunday.
        
  SEAWATER VISIBILITY:
 
     Seawater visibility was 8 to 10 feet at the Diablo Canyon Marina.
 
==========================================================================
24-Hour Ocean Condition Outlook for Wednesday 06/19 to Thursday 06/20

  SWELL:            DIR. NW      HT.  3-5   PER.  8-12  This morning
  Remaining  at:    DIR. NW      HT.  3-5   PER.  8-12  This afternoon
  Remaining  at:    DIR. NW      HT.  3-5   PER.  8-12  Tonight

 (Combined with:    DIR. SW      HT.  2-4   PER. 15-17  All day)
 
  WINDS:            DIR. VAR.    SPEED  5-10            This morning
  Increasing to:    DIR. NW      SPEED 10-15            This afternoon
  Decreasing to:    DIR. VAR.    SPEED  5-10            Tonight
==========================================================================
48-Hour Ocean Condition Outlook for Thursday 06/20 to Friday 06/21
    
  SWELL:            DIR. NW      HT.  3-5   PER.  8-12  Thursday morning
  Remaining  at:    DIR. NW      HT.  3-5   PER.  8-12  Thursday afternoon
  Remaining  at:    DIR. NW      HT.  3-5   PER.  8-12  Thursday night

 (Combined with:    DIR. SW      HT.  1-3   PER. 16-18  All day Thursday)
 
  WINDS:            DIR. SE      SPEED  5-10            Thursday morning
  Increasing to:    DIR. NW      SPEED 10-15            Thursday afternoon
  Decreasing to:    DIR. VAR.    SPEED  5-10            Thursday night
==========================================================================
 
Extended Ocean Condition Outlook:

     Increasing northwesterly winds Monday afternoon through
     Wednesday will generate a 6- to 8-foot northwesterly
     (320-degree, deep-water) sea and swell (with a 5- to
     11-second period) over this time frame.

==========================================================================