Weather

SLO County weather forecast for the week of July 25

John Lindsey
John Lindsey dmiddlecamp@thetribunenews.com

Here is this week’s weather forecast by PG&E meteorologist John Lindsey.

A weak area of low pressure will continue to develop over the Pacific Northwest on Monday. This condition is expected to produce marine low clouds with pockets of mist and drizzle at the beaches and coastal valleys during the night and morning hours. Consequently, cooler conditions will develop throughout the Central Coast. However, it will still be warm in the North County.

The ridge of high pressure is forecast to strengthen Tuesday into Thursday before weakening next weekend. This condition will produce a sharp temperature gradient between the beaches and North County, as a shallow marine layer will persist along the coastline. The Mid-State Fair will reach the low 100s, while the coastal valleys will hit the mid-80s over that time frame. The beaches will range from the high 50s to the mid-60s under mostly overcast skies.

Another low-pressure system will move into the Pacific Northwest on Friday into Sunday. This will cause the high-pressure ridge to break down, leading to a cooling trend over the weekend. Temperatures will decrease to near-seasonal levels for the North County and coastal valleys by Sunday into next week. No-sky July will persist along many of the beaches, with plenty of marine low clouds and below-normal temperatures through the first days of August.

Surf report

Monday’s 4- to 6-foot northwesterly (300-degree, deep-water) swell (with an 8- to 10-second period) is expected to remain at this height and period into Tuesday, lowering to 3 to 5 feet (with an 8- to 11-second period) on Wednesday into next Monday. Arriving from the Southern Hemisphere: A 1-foot Southern Hemisphere (175-degree, deep-water) swell (with a 13- to 15-second period) is forecast to arrive Tuesday, increasing to 1 to 2 feet (with an 11- to 13-second period) Wednesday.

Seawater temperatures are projected to range between 51 and 53 degrees through Tuesday, increasing to 52 to 55 degrees on Wednesday into Thursday, and rising to 54 to 57 degrees Friday into next Monday.

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This week’s PG&E safety tips. Warm to hot weather is expected this week away from the beaches, so practice these hot-weather safety tips:

▪  Avoid strenuous activities in hot, direct sunlight, drink plenty of water, and avoid alcohol and caffeine.

▪  Pay attention to your body. Muscle cramps, dizziness and nausea may be signs of a heat-related illness.

John Lindsey’s Weekly Forecast is special to The Tribune. He is PG&E’s Diablo Canyon Power Plant marine meteorologist and media relations representative. Contact him at pgeweather@pge.com. Follow him on Twitter @PGE_John.

This week’s temperatures

LOWS AND HIGHS, PASO ROBLES

MON

TUE

WED

THU

FRI

SAT

SUN

56 96

56 103

60 103

61 102

60 99

59 95

59 94

LOWS AND HIGHS, SLO AND COASTAL VALLEYS

MON

TUE

WED

THU

FRI

SAT

SUN

56 78

57 84

57 84

57 81

57 78

58 78

58 78

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