Pismo Beach Ocean / Surf Report

11/20/2020 

  SEA/SWELL:

    Today's 4- to 6-foot northwesterly (300-degree, deep-water)
    swell (with an 8- to 15-second period) will remain at this
    level through Sunday morning.

    A 6- to 8-foot northwesterly (305-degree, deep-water) sea
    and swell (with a 5- to 17-second period) is forecast along
    our coastline on Sunday afternoon through Monday morning,
    increasing to 7 to 9 feet (with 5- to 15-second period)
    on Monday afternoon through Wednesday.

    A 9- to 11-foot northwesterly (310-degree, deep-water) sea
    and swell (with a 5- to 17-second period) is forecast along
    our coastline on Thursday, decreasing to 6 to 8 feet next
    Friday.

  ATMOSPHERIC CONDITIONS:

    Variable amounts of high-level clouds will continue to
    steam form the southwest over the Central Coast through
    Saturday morning, decreasing Saturday afternoon.

    Fresh to strong (19 to 31 mph) and at times with gusts
    to 50 mph Santa Lucia (northeasterly) winds are forecast
    tonight through Saturday morning at Diablo Canyon.

    These northeasterly winds could gust to 55 mph near the
    Estero Bay area, especially along Highway 41 from Morro
    Bay High School heading toward Atascadero about halfway
    up the grade. Also the coastal canyons and parts of
    eastern San Luis Obispo, including Cal Poly, San Luis
    Obispo High School and French Medical Center during
    the morning.

    These winds will keep the marine low clouds out to
    seas through Saturday with high temperatures ranging
    between the high-60s and mid-70s throughout the Central
    Coast.

    An upper-level trough of low-pressure will move through
    the Central Coast Sunday night into Monday. This system
    will produce strong to gale-force (25 to 38 mph)
    northwesterly winds and partly cloudy skies with areas
    marine low clouds along the coastline, but rain is not
    expected.   

    The Santa Lucia winds will return on Tuesday through
    the Thanksgiving Day holiday and should produce mostly
    clear conditions with cold mornings in the inland valleys
    and mild afternoons throughout the Central Coast.

    Initialized with multiple atmospheric and oceanic variables,
    the ensemble packages that typically produce a broad range
    of possible weather outcomes indicate dry conditions through
    the end of November. However, they suggest a chance of rain
    by the 1st week of December.

   WILDFIRE INDEX RATINGS:
 
    COASTAL: FIA 508
    INLAND:  FIA 497, 510, 575, 580, 582 and 590

    The PG&E Fire Index Ratings will be at high (R3)
    levels along the Coastline and Coastal Valleys and
    Inland Valleys, and medium (R2) to high (R3) levels
    in the Far Inland Areas today.

    The PG&E Fire Index Ratings will be at very high (R4)
    levels along the Coastline and Coastal Valleys. The
    Inland Valleys and Far Inland Areas will be at high
    (R3) to medium (R2) levels on Saturday.

    The PG&E Fire Index Ratings will be at very high (R4)
    levels along the Coastline, Coastal and Inland Valleys.
    The Far Inland Areas will be at high (R3) levels on
    Sunday.

   DIABLO CANYON METEOROLOGICAL TOWER TEMPERATURE DATA:
 
         Yesterday's          Today's           Tomorrow's
         Min    Max         Min    Max         Min     Max
        55.6°   62.5°      57.5°   66.4°      56.0°    67.0°
 
   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     
     44 69   36 70  33 72  32 73  33 69  32 70  34 71  31 67  28 69         
        
   Coastal Valleys Temperatures, San Luis Obispo
 
      Thu     Fri    Sat    Sun    Mon    Tue    Wed    Thu    Fri
     48 72   49 73  45 77  42 75  42 71  42 73  41 70  38 67  37 70       
                    
   WINDS:

    Fresh to strong (19 to 31 mph) and at times with gusts
    to 50 mph Santa Lucia (northeasterly) winds are forecast
    tonight through Saturday morning.

    A pattern of moderate to fresh (13 to 24 mph) Santa Lucia
    (northeasterly) winds developing during the night and morning,
    shifting out of the northwest during the afternoon will start
    Saturday afternoon and will continue through Sunday morning.

    Strong to gale-force (25 to 38 mph) northwesterly winds are
    forecast Sunday afternoon through Monday.

    The Santa Lucia winds will return on Tuesday through the
    Thanksgiving Day holiday

   DIABLO CANYON METEOROLOGICAL TOWER WIND DATA:
 
     Today's Maximum Winds:
 
        Max peak winds:         NE   46.0 mph @  1:00 a.m.
        Max sustained wind:     NE   24.0 mph @  3:00 a.m.
 
     Monday's Maximum Winds:       
        
        Max peak winds:         NE   48.0 mph @ 11:15 p.m.
        Max sustained wind:     NE   26.0 mph @  6:00 p.m.
 
   SEAWATER TEMPERATURES:
 
     Seawater temperatures will range between 52 and 55 degrees
     through next Friday.

   OCEAN CURRENTS:

     A southerly (offshore) flowing current is expected to flow
     southward through next Friday.

   SEAWATER VISIBILITY:
 
     Seawater visibility was 19 to 21 feet at the Diablo Canyon Marina.

==========================================================================
24-Hour Ocean Condition Outlook for Friday 11/20 to Saturday 11/21

  SWELL:            DIR. NW      HT.  4-6   PER.  8-20  This morning
  Remaining  at:    DIR. NW      HT.  4-6   PER.  8-16  This afternoon
  Remaining  at:    DIR. NW      HT.  4-6   PER.  8-15  Tonight

  WINDS:            DIR. NE      SPEED 20-25 + 45       This morning
  Decreasing to:    DIR. NW      SPEED 10-15            This afternoon
  Increasing to:    DIR. NE      SPEED 20-25 + 50       Tonight
==========================================================================
48-Hour Ocean Condition Outlook for Saturday 11/21 to Sunday 11/22
   
  SWELL:            DIR. NW      HT.  4-6   PER.  8-15  Saturday morning
  Remaining  at:    DIR. NW      HT.  4-6   PER.  8-15  Saturday afternoon
  Remaining  at:    DIR. NW      HT.  4-6   PER.  8-14  Saturday night

  WINDS:            DIR. NE      SPEED 20-25 + 50       Saturday morning
  Decreasing to:    DIR. NE      SPEED 10-15            Saturday afternoon
  Increasing to:    DIR. NE      SPEED 15-20 + 25       Saturday night
==========================================================================
 
 Extended Ocean Condition Outlook:

  Strong to gale-force (25 to 38 mph) northwesterly winds are forecast
  Sunday afternoon through Monday.

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