Pismo Beach Ocean / Surf Report

5/21/2019

 SEA/SWELL:

      A 10- to 12-foot northwesterly (310-degree, deep-
      water) sea and swell (with a 7- to 14-second period)
      will arrive later this afternoon and will remain at
      this height through Wednesday morning, decreasing to
      9 to 11 feet (with a 7- to 12-second period) by
      Wednesday afternoon and night.

      This northwesterly (310-degree, deep-water) sea and
      swell will further decrease to 8- to 10-feet (with
      a 7- to 11-second period) on Thursday, becoming a
      to 7 to 9 foot northwesterly (300-degree, deep-
      water) swell (with an 8- to 10-second period) on
      Friday.

      A 4- to 6-foot northwesterly (290-degree, deep-water)
      swell (with an 8- to 11-second period) is forecast
      along our coastline on Saturday into next Tuesday.

      Arriving from the Southern Hemisphere:

      Today's 1- to 2-foot Southern Hemisphere (180-degree,
      deep-water) swell (with a 15- to 17-second period)
      will continue at this height into Wednesday.

      A 2- to 3-foot Southern Hemisphere (220-degree, deep-
      water) swell (with a 16- to 18-second period) will
      arrive on Thursday into Friday.

  ATMOSPHERIC CONDITION:

      A cold front produced gentle to moderate (8 to 18 mph)
      southerly winds and areas of drizzle/rain showers this
      morning.

      Rainfall amounts have been generally below a tenth of
      an inch throughout the Central Coast. However, Jim at
      Oak Shores recorded 0.53 of an inch, while Rocky
      Butte has seen 0.16 of an inch of rain. Snow is falling
      in the Sierra Nevada above 5,000 feet.  

      This cold front will be followed by moderate gale-force
      to fresh gale-force (32 to 46 mph) northwesterly winds
      and partly cloudy skies this afternoon.

      Strong to gale-force (25 to 38 mph) northwesterly winds,
      partly cloudy but dry weather is forecast on Wednesday.

      Gentle to moderate (8 to 18 mph) southerly winds, mostly
      cloudy skies and cooler weather is forecast on Thursday
      into Friday.

      An upper-level low-pressure system will move into the
      Central Coast over the Memorial Day Weekend. This system
      will produce cooler temperatures along with rain showers
      and a chance of thunderstorms on Saturday, Sunday and
      Monday.

      Dry weather may then return to most areas late next week
      except for continued lingering showers over the Sierra
      Nevada.  Still no clear signs of any early season heat
      waves through the end of the month and into early June.
          
  WILDFIRE DANGER RATINGS:
 
       Today's PG&E Fire Index Ratings are at low levels
       along the coastline, coastal valleys and in the inland
       valleys.
 
   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
        54.4°   58.3°      51.1°   57.0°      51.0°    59.0°
 
   PG&E Weather Office in San Francisco predicted temperatures
   for San Luis Obispo County
 
    Inland Temperatures, Paso Robles
 
   Actual                    Predicted
         
     Mon     Tue    Wed    Thu    Fri    Sat    Sun    Mon    Tue
    44 69   48 65  49 71  49 69  51 73  51 65  49 70  46 78  50 81              
                                         
   Coastal Valleys Temperatures, San Luis Obispo
         
     Mon     Tue    Wed    Thu    Fri    Sat    Sun    Mon    Tue
    48 66   51 63  48 65  50 66  55 71  52 69  48 67  49 68  50 73                 
 
  WINDS:

     Moderate gale-force to fresh gale-force (32 to 46 mph)
     northwesterly winds are forecast this afternoon, decreasing
     to strong to gale-force (25 to 38 mph) levels on Wednesday.

     The winds will decrease and shift out of the south on Thursday
     into Sunday.

  DIABLO CANYON METEOROLOGICAL TOWER WIND DATA:
 
     Last night's Maximum Winds:
 
        Max peak winds:       SE         17.0 mph @   6:45 a.m.
        Max sustained wind:   SE          9.0 mph @   6:45 a.m.
 
     Yesterday's Maximum Winds:
           
        Max peak winds:       NW         36.0 mph @  10:15 p.m.
        Max sustained wind:   NW         28.0 mph @  10:15 p.m.
 
  SEAWATER TEMPERATURES:
 
     Intake seawater temperatures will range between 54 and 57
     degrees through today, decreasing to 53 to 54 degrees on
     Wednesday into Sunday.
 
  OCEAN CURRENTS:

     A southerly (offshore) flowing current will develop this
     afternoon and will continue into Sunday.
     
  SEAWATER VISIBILITY:
 
     Seawater visibility was 5 to 7 feet at the Diablo Canyon Marina.
 
==========================================================================
24-Hour Ocean Condition Outlook for Tuesday 05/21 to Wednesday 05/22

  SEA/SWELL:        DIR. NW      HT.  5-7   PER.  8-12  This morning
  Increasing to:    DIR. NW      HT.  7-9   PER.  5-14  This afternoon
  Increasing to:    DIR. NW      HT. 10-12  PER.  6-14  Tonight

 (Combined with:    DIR. SW      HT.  1-2   PER. 15-17  All day)
 
  WINDS:            DIR. SE      SPEED 15-20            This morning
  Increasing to     DIR. NW      SPEED 25-30 + 35       Late morning
  Increasing to:    DIR. NW      SPEED 35-40 + 50       This afternoon
  Decreasing to:    DIR. NW      SPEED 20-25 + 30       Tonight
==========================================================================
48-Hour Ocean Condition Outlook for Wednesday 05/22 to Thursday 05/23
    
  SEA/SWELL:        DIR. NW      HT. 10-12  PER.  7-13  Wednesday morning
  Decreasing to:    DIR. NW      HT.  9-11  PER.  7-12  Wednesday afternoon
  Remaining  at:    DIR. NW      HT.  9-11  PER.  7-12  Wednesday night

 (Combined with:    DIR. SW      HT.  1-2   PER. 15-17  All day Wednesday)
 
  WINDS:            DIR. NW      SPEED 15-20 + 30       Wednesday morning
  Increasing to:    DIR. NW      SPEED 30-35 + 40       Wednesday afternoon
  Decreasing to:    DIR. NW      SPEED 10-15 + 20       Wednesday night
==========================================================================
 
Extended Ocean Condition Outlook:
    
      A 4- to 6-foot northwesterly (310-degree, deep-water)
      swell (with an 8- to 11-second period) is forecast
      along our coastline on Saturday into next Tuesday.

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