Pismo Beach Ocean / Surf Report

11/20/2019


  SEA/SWELL:

    Today's 10 to 12 foot northwesterly (315-degree, deep water)
    sea and swell (with 7- to 12-second period) will decrease
    to 8 to 10 feet by tonight.

    A 7- to 9-foot northwesterly (300-degree, deep water)
    swell (with an 8- to 12-second period) is forecast along
    our coastline on Thursday, decreasing to 5 to 7 feet
    (with an 8- to 20-second period) on Friday.

    A 7- to 9-foot northwesterly (300-degree, deep water)
    swell (with an 8- to 17-second period) is forecast along
    our coastline on Saturday, becoming an 8- to 10 foot
    northwesterly (310-degree, deep water) sea and swell
    (with a 5- to 15-second period) by Sunday afternoon.

    Moderate gale-force to fresh gale-force (32 to 46 mph)
    northwesterly winds are forecast on Monday. These winds
    will generate an 11- to 13-foot northwesterly (310-degree,
    deep water) sea and swell (with a 5- to 15-second period)
    on Monday, decreasing to 9 to 11 feet by Tuesday.

    A 13- to 15-foot northwesterly (310-degree, deep water)
    sea and swell (with a 5- to 20-second period) is forecast
    along our coastline next Wednesday into Thanksgiving Day
   
    A prolonged period of high northwesterly sea and swell
    is expected to continue along our coastline through
    the end of November.

   ATMOSPHERIC CONDITIONS:

    A 993 mb low-pressure system about 100 miles east of
    San Luis Obispo will continue to produce scattered
    rain showers along the Central Coast.

    Rainfall amounts are expected to be less than quarter
    of an inch with most of the precipitation remaining
    in Southern California & Sierra Nevada. Warren reported
    0.11 of an inch at Upper Los Berros Canyon, Nipomo.
    Snow levels are about 6,500 feet.

    Today's high temperatures will range from the low to
    mid 60s in the coastal and inland valleys. The beaches
    will range from the high 50s to the low 60s.

    Gentle southerly winds, night and morning marine low
    clouds with areas of fog and mist and variable mid to
    high-level clouds with high temperatures in the 60s is
    expected on Thursday into Friday.

    Fresh to strong (19 to 31 mph) Santa Lucia (northeasterly)
    winds are forecast on Saturday morning. These offshore
    winds will produce clear skies and warmer temperatures
    on Saturday into Sunday morning.

    Increasing northwesterly winds and clouds will develop
    Sunday afternoon into Monday. In fact, moderate gale-force
    to fresh gale-force (32 to 46 mph) northwesterly winds
    are forecast Monday afternoon, decreasing Tuesday.

    A few of the models are advertising a windy and wet
    weather pattern next Wednesday, Thursday (Thanksgiving
    Day) and Friday. Remember, these are long-range models
    and are subject to a great deal of change.

   WILDFIRE INDEX RATINGS:

    The PG&E Fire Index Ratings will be at low (R1) to medium
    (R2) levels along the Coastline, Coastal and Inland Valleys
    and very high (R3) in a few of the northern Far Inland
    areas today.

    The PG&E Fire Index Ratings will be at low (R1) to medium
    (R2) levels along the Coastline, Coastal and Inland Valleys
    and the Far Inland areas on Thursday and Friday.

  DIABLO CANYON METEOROLOGICAL TOWER TEMPERATURE DATA:

         Yesterday's          Today's           Tomorrow's
         Min    Max         Min    Max         Min     Max
        53.5°   59.7°      52.9°   58.0°      55.0°    59.0°

   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
     38 72   46 65  39 64 38 68 35 71 31 72 30 70 29 68 35 65    

   Coastal Valleys Temperatures, San Luis Obispo
        
      Tue     Wed    Thu   Fri   Sat   Sun   Mon   Tue   Wed
     43 66   49 63  45 63 46 64 45 72 43 74 43 71 41 68 44 65    
                    
  WINDS:

     Fresh to strong (19 to 31 mph) northwesterly winds will
     develop along the coastline this afternoon, decreasing
     tonight.

     Gentle to moderate (8 to 18 mph) southerly winds are forecast
     on Thursday into Friday.

     Fresh to strong (19 to 31 mph) Santa Lucia (northeasterly)
     winds are forecast on Saturday morning, decreasing Saturday
     afternoon.

     Strong to gale-force (25 to 38 mph) northwesterly winds
     will develop Sunday afternoon, increasing to moderate
     gale-force to fresh gale-force (32 to 46 mph) levels
     on Monday.

  DIABLO CANYON METEOROLOGICAL TOWER WIND DATA:

     Last night's Maximum Winds:
 
        Max peak winds:       NW          23.0 mph @   7:30 a.m.
        Max sustained wind:   NW          15.0 mph @   7:30 a.m.

     Yesterday's Maximum Winds:       
        
        Max peak winds:       NW          49.0 mph @   7:45 p.m.
        Max sustained wind:   NW          39.0 mph @   7:45 p.m.

  SEAWATER TEMPERATURES:

     Intake seawater temperatures will range from 53 to 56 degrees
     through Sunday, decreasing on Monday and Tuesday.

  OCEAN CURRENTS:

     A southerly (offshore) flowing current is forecast today,
     becoming a northerly (onshore) flowing current on Thursday
     into Saturday.

     A southerly (offshore) flowing current is forecast on Sunday
     into Tuesday.
     
  SEAWATER VISIBILITY:

     Seawater visibility was 2 to 3 feet at the Diablo Canyon Marina.

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24-Hour Ocean Condition Outlook for Wednesday 11/20 to Thursday 11/21

  SEA/SWELL:        DIR. NW      HT. 10-12  PER.  7-12  This morning
  Decreasing to:    DIR. NW      HT.  9-11  PER.  7-12  This afternoon
  Decreasing to:    DIR. NW      HT.  8-10  PER.  7-12  Tonight

  WINDS:            DIR. NW      SPEED 15-20            This morning
  Increasing to:    DIR. NW      SPEED 20-25 + 35       This afternoon
  Decreasing to:    DIR. NW      SPEED  5-10            Tonight
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48-Hour Ocean Condition Outlook for Thursday 11/21 to Friday 11/22
    
  SWELL:            DIR. NW      HT.  7-9   PER.  7-12  Thursday morning
  Remaining  at:    DIR. NW      HT.  7-9   PER.  8-12  Thursday afternoon
  Remaining  at:    DIR. NW      HT.  7-9   PER.  8-12  Thursday night

  WINDS:            DIR. SE      SPEED 10-15            Thursday morning
  Remaining  at:    DIR. SE      SPEED 10-15            Thursday afternoon
  Remaining  at:    DIR. SE      SPEED 10-15            Thursday night
==========================================================================

Extended Ocean Condition Outlook:

    Moderate gale-force to fresh gale-force (32 to 46 mph)
    northwesterly winds are forecast on Monday. These winds
    will generate an 11 to 13 foot northwesterly (310-degree,
    deep water) sea and swell (with a 5- to 15-second period)
    on Monday, decreasing to 9 to 11 feet by Tuesday.
     
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