• This week's San Luis Obispo Tribune's Weather Watch Column "Getting sick of the rain, SLO? Well, get used to it, we’re ‘locked in’ to this pattern" http://www.sanluisobispo.com/news/weather/weather-watch/ • You can catch the live weather forecasts weekday mornings from 6-9 on the KVEC 920 AM on First Look with Andy Morris • For weather updates, charts and photos, along with power outage information and other events you can follow me at: https://twitter.com/pge_john ======== PG&E DCPP Weather Forecast for Wednesday 02/20/19 =========== SEA/SWELL: Strong to gale-force (25 to 38 mph) northwesterly winds will generate a 9- to 11-foot northwesterly (320-degree, deep-water) sea and swell (with a 5- to 14-second period) later this afternoon into Thursday. A 7- to 9-foot northwesterly (320-degree, deep-water) sea and swell (with a 7- to 14-second period) is forecast along our coastline on Friday, decreasing to 4 to 6 feet with the same period on Saturday into Monday. Increasing sea and swell may develop along our coastline starting March 1st into March 7th. ATMOSPHERIC CONDITION: An upper-level low-pressure system is producing partly to mostly cloudy skies and slightly warmer temperatures this morning. Strong to gale-force (25 to 38 mph with gust to 50 mph) northwesterly winds along the shoreline and scattered rain showers throughout the Central Coast will start this afternoon and will continue into Thursday evening. This frigid low-pressure system is expected to create between 0.10 and 0.25 of inch of rain with snow levels as low as 2,000 feet along the coastline and 1,500 feet further inland by Thursday morning. The gale-force winds combined with the scattered rain showers and low elevation snow levels will make it feel even colder. Moderate to fresh (13 to 24 mph) Santa Lucia (northeasterly) winds during the night and morning hours will start on Friday and will continue through Sunday. This condition will produce partly and dry weather along coastline and coastal valleys. However, areas of patchy fog will develop in the inland valley during the night and morning hours. Next chance for rain showers will be Monday with a continued chance into Tuesday, although longer-range guidance is not in agreement with the potential weather pattern. With that said, the long-range models are advertising significant rainfall (possible atmospheric river) and warmer temperatures developing along the Central Coast in the first week of March. Please remember, these are long-range models and are subject to change..........stay tuned! 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 44.9° 53.7° 47.6° 55.0° 49.0° 54.0° 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 26 53 29 54 35 52 26 56 30 58 34 59 36 58 38 60 Coastal Valleys Temperatures, San Luis Obispo Tue Wed Thu Fri Sat Sun Mon Tue 31 57 34 56 39 55 32 59 35 60 40 61 42 60 42 63 WINDS: Fresh to strong (19 to 31 mph) northwesterly winds are forecast Wednesday afternoon, increasing to strong to gale-force (25 to 38 mph) levels on Wednesday evening into Thursday. A pattern of moderate to fresh (13 to 24 mph) Santa Lucia (northeasterly) winds developing the night and morning hours, shifting out of the northwest and increasing to fresh to strong (19 to 31 mph) levels during the afternoon will start Friday and will continue through Saturday. DIABLO CANYON METEOROLOGICAL TOWER WIND DATA (back-up): Last night's Maximum Winds: Max peak winds: NW 17.4 mph @ 6:30 a.m. Max sustained wind: NW 13.0 mph @ 6:30 a.m. Yesterday's Maximum Winds: Max peak winds: NE 24.0 mph @ 4:45 a.m. Max sustained wind: NE 17.0 mph @ 4:45 a.m. SEAWATER TEMPERATURES: Intake seawater temperatures will range between 53 and 56 degrees through Sunday. OCEAN CURRENTS: A southerly (offshore) flowing current will continue to flow southward through Sunday. SEAWATER VISIBILITY: Seawater visibility was 3 to 5 feet at the Diablo Canyon Marina. ========================================================================== 24-Hour Ocean Condition Outlook for Wednesday 02/20 to Thursday 02/21 SEA/SWELL DIR. NW HT. 5-7 PER. 8-15 This morning Increasing to: DIR. NW HT. 9-11 PER. 5-14 late afternoon Remaining at: DIR. NW HT. 9-11 PER. 5-13 Tonight WINDS: DIR. NW SPEED 15-20 This morning Increasing to: DIR. NW SPEED 30-35 + 50 This afternoon Decreasing to: DIR. NW SPEED 25-30 + 40 Tonight ========================================================================== 48-Hour Ocean Condition Outlook for Thursday 02/21 to Friday 02/22 SEA/SWELL DIR. NW HT. 9-11 PER. 8-13 Thursday morning Increasing to: DIR. NW HT. 9-11 PER. 5-13 Thursday afternoon Remaining at: DIR. NW HT. 9-11 PER. 5-13 Thursday night WINDS: DIR. N SPEED 20-25 + 30 Thursday morning Increasing to: DIR. NW SPEED 25-30 + 45 Thursday afternoon Decreasing to: DIR. NW SPEED 20-25 + 35 Thursday night ========================================================================== Extended Ocean Condition Outlook: Increasing sea and swell may develop along our coastline starting March 1st into March 7th. ========================================================================== The 24 - Hour Ocean Data from the Diablo Canyon Waverider Buoy: MONTH DAY TIME SIG.HEIGHT PERIOD SWELL DIRECTION SST 02 15 2330 14.0 15 255 57.4 02 16 0030 14.0 14 264 57.4 02 17 0130 11.0 14 262 57.0 02 18 0630 8.3 10 283 55.6 02 19 0400 7.1 15 264 55.4 02 20 0500 5.7 14 262 57.0 DCPP Ocean Lab Waverider Buoy Energy Spectral Analysis: Mo. daytime sig.ht. sig.per. energy (cm.sq.) (cm) (sec) 22+ 20 17 15 13 11 9 7 -------------------------------------------------------------------------- 02 15 2330 428 15 29 297 1341 2601 2214 1732 1342 868 02 16 0030 427 11 23 304 977 1968 2233 3006 1258 738 02 17 0130 334 11 4 48 233 933 1287 1437 1087 905 02 18 0630 254 9 9 180 95 23 249 876 1300 491 02 19 0400 216 9 6 38 291 429 76 599 646 290 02 20 0500 173 7 1 3 24 199 204 71 384 477 Daily Swell Inspection Program for today: NAME DAY TIME HEIGHT PERIOD SST (PST) (FEET) (SECONDS) (DEG. F) # 66 Ocean Station Papa 20 0533 13 13 42.4 # 36 South Nomad no recent reports # 05 West Washington State 20 0550 15 9 n/a # 02 West Oregon The buoy went adrift 02/09/19 at 2300z. # 06 SE Papa 20 0650 8 12 52.3 # 59 California 20 0650 9 6 54.3 # 44 Humboldt Bay Waverider 20 0603 8 7 51.6 # 29 Point Reyes Waverider 20 0603 9 8 54.1 # 42 San Francisco Sandbar no recent reports # 15 Monterey Waverider Buoy 20 0503 10 8 55.8 # 28 Cape San Martin 20 0650 10 8 55.6 # 76 DCPP Waverider 20 0500 6 14 57.0 # 22 Santa Lucia Escarpment 20 0515 9 13 55.9 # 11 Point Arguello 20 0650 8 8 55.8 # 63 Harvest Buoy 20 0633 8 14 56.3 # 19 San Nicolas Island 20 0600 8 14 57.0 # 20 Scripps 20 0550 2 10 58.1 # 33 Pearl Harbor Entrance 20 0600 2 9 73.6 # 04 SE Hawaii 20 0650 10 11 77.0 Precipitation at the Diablo Canyon Ocean Lab: Monday 1500 through Tuesday 1500 0.00 inches Tuesday 1500 through Wednesday 1500 0.00 inches Precipitation this rain season (July 1 - June 30): 14.30 inches Average season rainfall at DCPP to date: 12.10 inches Ocean Lab Barometer: 30.03 in/Hg or1017.0 mb -1.8 mb (Falling) Today's Sunrise 6:44 AM Sunset 5:50 PM Tomorrow's Sunrise 6:42 AM Sunset 5:51 PM Tides: Low Tide High Tide AM PM AM PM 20 Wednesday 3:57 1.3 4:51 -1.1 10:01 6.3 11:16 4.9 21 Thursday 4:51 1.1 5:31 -0.6 10:53 5.8 11:56 5.1 22 Friday 5:49 1.0 6:12 0.1 11:48 5.1 ----- --- 23 Saturday 6:53 0.9 6:54 0.8 12:39 5.1 12:49 4.4 24 Sunday 8:05 0.9 7:40 1.5 1:26 5.1 2:05 3.7 25 Monday 9:27 0.8 8:37 2.1 2:18 5.1 3:43 3.3 26 Tuesday 10:51 0.6 9:52 2.5 3:18 5.0 5:35 3.2 ======================================================================== This day in weather history 1805 - The Potomac River was opened after being closed by ice for a period of two months. (Sandra and TI Richard Sanders - 1987) 1988 - Snow and strong northerly winds ushered arctic air into the Great Lakes Region. The temperature at Sault Ste Marie MI plunged from 30 degrees at 5 AM to one below zero by 3 PM, with a wind chill reading of 40 degrees below zero. Five cities in Florida reported record high temperatures for the date. The afternoon high of 90 degrees at Lakeland was just a degree shy of their February record. (The National Weather Summary) 2018 - A cold and clear morning developed throughout San Luis Obispo County. Here are this morning's lows: Paso Robles 22 degrees, SLO County Regional Airport 37, Los Osos/Baywood Park 32, Windrose Farm, Creston 16, SLO Botanical Garden 29, Morro Bay 37, and Santa Margarita Fire Department 29. ======================================================================== This weather forecast is a service provided by Pacific Gas and Electric Company (PG&E) to our energy customers. The forecast is valid only for the Diablo Canyon Power Plant coastline area (approximately a one-half mile radius surrounding the plant). Some of the information in this forecast is provided by Pacific Weather Analysis, with their permission. Replication of this email must be in its entirety. You may view and copy material from this forecast, provided you retain all copyright, trademark, and other proprietary notices displayed on the materials. Use of these materials in publications, radio, television, other media presentations, or other websites is prohibited without PG&E's express written consent. PG&E is a subsidiary of PG&E Corporation, one of the largest natural gas and electric utilities in the United States, delivering some of the nation's cleanest energy to 15 million people in northern and central California. If you would like to subscribe or unsubscribe to this daily forecast, please send an email to PGEweather@pge.com. Any questions about this forecast, please E-mail John Lindsey at jcl5@pge.com