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Yahoo
25-05-2025
- Climate
- Yahoo
Heat wave headed to SLO County after a sunny, breezy Memorial Day weekend
A live data feed from the National Weather Service containing official weather warnings, watches, and advisory statements. Tap warning areas for more details. Sources: NOAA, National Weather Service, NOAA GeoPlatform and Esri. Open Steve Wilson swilson@ San Luis Obispo County can expect a mild, windy and sunny Memorial Day weekend, followed by 'May Gray' weather during the week. A pattern of strong to gale-force (25 to 38 mph) northwesterly winds developing during the afternoon and decreasing during the night and morning will continue through Memorial Day. These winds will produce primarily clear skies, except for low marine clouds with pockets of fog and mist at night and in the morning. Temperatures will remain mild. Inland valleys like Paso Robles will warm into the low 80s, while coastal valleys such as San Luis Obispo will reach the low 70s. Most beaches will see highs in the 50s to low 60s, though southerly facing beaches like Cayucos, Avila Beach and Shell Beach could climb into the low 70s thanks to these downslope winds. The northwesterly winds will decrease on Tuesday and Wednesday to moderate-to-fresh (13 to 24 mph) levels, further lowering to gentle-to-moderate (8 to 18 mph) levels on Thursday into the following weekend. This condition and increasing inland valley temperatures will produce a deep marine layer with night and morning fog and mist, with some clearing along the shoreline in the afternoon, known as 'May Gray.' Away from the ocean, high pressure expanding from the desert will produce the first triple-digit temperatures of 2025 at the Paso Robles Municipal Airport on Friday and Saturday. The record daily high at the airport is 102 degrees on Friday and 106 on Saturday, which could both be broken by this week's temperatures — forecast to reach 102 on Friday and 107 on Saturday. Closer to the ocean, San Luis Obispo is expected to reach the low to mid-80s, while all the beaches will range from the high 50s to the low 60s under cloudy skies. Over this period, the Central Valley could see temperatures ranging between 110 and 115 degrees. Looking further ahead, long-range models indicate that dry conditions will continue through the end of June. Gale-force northwesterly winds along the California coastline will generate a 6- to 8-foot northwesterly (305-degree deep water) sea and swell (with a 5- to 9-second period) on Saturday through Memorial Day. A 5- to 7-foot northwesterly (295-degree deep water) sea and swell (with a 7- to 11- second period) is forecast on Tuesday, decreasing to 3 to 5 feet (with an 8- to 11-second period) on Wednesday and remaining at this level through next Saturday. A 1- to 3-foot southern hemisphere (205-degree deep water) swell (with a 15- to 18- second period) will arrive along our coastline on Saturday and remain at this level through Tuesday, gradually fading away on Wednesday. On June 1 and 2, the highest southern hemisphere swell of the year is expected to arrive at our coastline, at 3- to 5-feet (with an 18- to 22-second period) from 200 degrees. Surface seawater temperatures will range between 49 and 51 degrees through Tuesday, gradually warming through next weekend. 1917: A tornado ripped through southeast Kansas, traveling 65 mph and setting a record for the average speed of any tornado. 1989: Thunderstorms developing ahead of a strong cold front produced severe weather from Oklahoma to Ohio through the day and night. Thunderstorms spawned nine tornadoes, and there were 155 reports of large hail and damaging winds. Hail 3.5 inches in diameter was reported at Dittmer, Missouri, and thunderstorm winds gusting to 90 mph caused $20 million at Rockville, Indiana. (The National Weather Summary) (Storm Data) 2018: A late-season, low-pressure system centered over the Bay Area produced light rain showers throughout the Central Coast. LOWS AND HIGHS, PASO ROBLES SUN MON TUE WED THU FRI SAT SUN 47, 83 47, 81 49, 83 50, 82 51, 89 55, 102 57, 107 55, 97 LOWS AND HIGHS, SAN LUIS OBISPO AND COASTAL VALLEYS SUN MON TUE WED THU FRI SAT SUN 49, 70 49, 72 51, 71 52, 75 54, 77 57, 81 58, 84 54, 81 John Lindsey is a retired PG&E marine meteorologist. Email him at JohnLindseyLosOsos@ or follow him on X @PGE_John.
Yahoo
24-05-2025
- Climate
- Yahoo
What to expect this Memorial Day weekend in KC as heaviest rains shift south
Although a wet holiday weekend remains in the forecast for the Kansas City area, the threat of the heaviest rainfall has shifted to the south, according to the National Weather Service. Showers and thunderstorms are expected to remain south of U.S. 50 Saturday morning, with 'only an errant shower farther north, the weather service said in its forecast discussion. There is expected to be a break in the rain in the afternoon. Cloudy skies will keep temperatures below average, climbing to around 69 degrees. Kansas City typically sees temperatures around 78 degrees this time of year. Rain and thunderstorms are expected to redevelop Saturday night across southern Kansas into southern Missouri, bringing the chance for another round of heavy rain overnight into Sunday, the weather service said. While the heaviest rainfall is expected to be south of the Kansas City forecast area, there is a marginal chance for isolated strong to severe storms just south of the metro area, the weather service said. The main risk from the stronger storms will be hail and damaging winds. There is a potential for multiple thunderstorms to move over the same area one after another, like train cars on a track, leading to heavy rainfall in a short period and increasing the risk of flooding in that area, the weather service said. A flood watch has been issued for Linn County in Kansas and Bates and Henry counties in Missouri. Showers and thunderstorms might continue into the daylight on Sunday, the weather service said. The rain and clouds will result in even cooler temperatures. The metro should see temperatures climb to around 62 degrees. The wet and stormy weather pattern will persist into Memorial Day, with temperatures a degree or two colder. The weather service forecasts that between one and 1.5 inches of rain will fall in the Kansas City metro between Saturday and Tuesday morning. Less than an inch of rain is expected north of the metro, while areas to the south could see two to three inches of rain. Areas south of the Kansas City forecast area are expected to see even higher amounts. 'River flooding is possible, especially for rivers already experiencing elevated flow,' the weather service said. 'Stay weather aware with outdoor activities along or near lakes, streams, or rivers this holiday weekend.' A live data feed from the National Weather Service containing official weather warnings, watches, and advisory statements. Tap warning areas for more details. Sources: NOAA, National Weather Service, NOAA GeoPlatform and Esri. Open Steve Wilson swilson@
Yahoo
18-05-2025
- Climate
- Yahoo
Warming trend headed to SLO County with highs back into the 90s
A live data feed from the National Weather Service containing official weather warnings, watches, and advisory statements. Tap warning areas for more details. Sources: NOAA, National Weather Service, NOAA GeoPlatform and Esri. Open Steve Wilson swilson@ A deep marine layer will develop Saturday morning, bringing patches of mist and drizzle along with cooler-than-normal temperatures to the Central Coast. By Sunday, gale-force, northwesterly winds will arrive, clearing the skies and ushering in a warming trend through the following weekend. Meanwhile, the long-delayed, infamous spring winds of April will finally make their appearance in May. An upper-level trough of low pressure will bring a deep marine layer to the coastal regions on San Luis Obispo County on Saturday morning and night, accompanied by well-below-normal temperatures. Fresh to strong (19 to 32 mph with gusts up to 40 mph) northwesterly winds on Saturday afternoon will make the air feel even cooler. Meanwhile, a robust 1,032-millibar Eastern Pacific High, anchored about 1,100 miles west of Monterey Bay, will keep the storm track well to the north. This high-pressure system will generate strong to gale-force (25 to 38 mph with gusts up to 45 mph) northwesterly winds along the Northern and Central California coast starting Sunday and persisting through next weekend. An upper-level ridge will also develop, producing gentle to moderate (8 to 18 mph) Santa Lucia winds during the mornings on Sunday and Monday. These down-slope winds will help limit marine cloud development, allowing for sunnier skies and warmer temperatures. Inland valleys like Paso Robles will warm into the low to mid-80s, while coastal valleys such as San Luis Obispo will reach the upper 70s. Most beaches will see highs in the upper 60s to low 70s, though southerly facing beaches like Cayucos, Avila Beach and Shell Beach could climb into the upper 70s thanks to these localized winds. Persistent northwesterly winds from Tuesday through the weekend will allow the marine layer, with patches of fog and mist, to redevelop along the coast during the night and in the morning. However, skies will clear by the afternoon, with temperatures continuing to warm. Inland valleys will climb into the 90s, coastal valleys into the 80s, while most beaches will remain cooler in the upper 50s to low 60s. Again, southerly facing beaches will be the exception, likely reaching to the 70s. Looking further ahead, long-range models indicate that dry conditions are expected to continue through the first week of June. Gale-force, northwesterly winds along the California coastline will generate a 7- to 9-foot northwesterly (310-degree deep water) sea and swell (with a 5- to 9-second period) through next weekend — ushering in rough oceanographic conditions. Whether you are a scuba diver, surfer, fisher or just a beach visitor, you will undoubtedly notice the frigid temperature of the ocean along our rugged coast as gale-force northwesterly winds will blow this week. So why do these winds generate such cold ocean temperatures? As the northwesterly winds blow parallel to our coastline, the friction of the wind causes ocean surface water to move. Combined with the rotation of the earth, these winds push the surface waters to the right of the wind direction — pushing these waters out to sea, which creates a void. Cold and nutrient-rich water is drawn from below to fill this void. The upward movement of this colder water is called upwelling. During periods of strong to gale-force northwesterly winds, I've seen seawater temperatures along the immediate coastline drop nearly 7 degrees in just one day. Surface seawater temperatures will range between 49 and 51 degrees through next weekend. 1980: Mount St. Helens erupted in Washington, spewing ash and smoke 63,000 feet into the air. Heavy ash covered the ground to the immediate northwest, and small particles were carried to the Atlantic Coast. (David Ludlum) 2012: A rare annular eclipse occurred in San Luis Obispo. The partial eclipse began at 5:21 p.m. with the maximum eclipse at 6:36 p.m. The event ended at 7:42 p.m., shortly before sunset. 2020: A late-season cold front passed through the Central Coast with rain, gentle winds and mild temperatures. Rainfall amounts ranged from 0.67 of an inch at the Morro Toro Cal Fire Station Number 14 off of Highway 41, 0.44 of an inch at Lopez Dam and 0.33 of an inch both at Arroyo Grande and Nipomo. Cal Poly and Los Osos reported 0.14 of an inch of rain. LOWS AND HIGHS, PASO ROBLES SUN MON TUE WED THU FRI SAT SUN 44, 80 49, 87 54, 92 55, 93 56, 97 53, 88 52, 85 52, 86 LOWS AND HIGHS, SAN LUIS OBISPO AND COASTAL VALLEYS SUN MON TUE WED THU FRI SAT SUN 47, 77 51, 81 56, 83 55, 81 57, 85 55, 74 53, 72 54, 75 John Lindsey is a retired PG&E marine meteorologist. Email him at JohnLindseyLosOsos@ or follow him on X @PGE_John.
Yahoo
04-05-2025
- Climate
- Yahoo
Ready for ‘May gray'? SLO County weather forecast calls for partly cloudy skies
A live data feed from the National Weather Service containing official weather warnings, watches, and advisory statements. Tap warning areas for more details. Sources: NOAA, National Weather Service, NOAA GeoPlatform and Esri. Open Steve Wilson swilson@ The windy and cloudy weekend will give way to typical 'May gray' conditions along the coast as winds diminish from Monday through Thursday. The 2024–25 rain season, measured from July 1, 2024, through June 30, 2025, is rapidly drawing to a close, with little change expected in seasonal rainfall totals. In a textbook La Niña pattern, most of the Central Coast received only 50% to 60% of normal rainfall. One notable exception was Rocky Butte, in the northwestern corner of San Luis Obispo County, which reached 90% of its seasonal average. By the end of April: The Paso Robles Municipal Airport received 7.1 inches of rain — 61% of the average. The San Luis Obispo County Regional Airport recorded 11.2 inches — 64% of the average. The Santa Maria Airport measured 7 inches of rain — 58% of average. The Santa Barbara Municipal Airport also logged 7 inches of rain, but that equated to just 51% of its seasonal norm. A mostly dry cold front was forecast to pass through the Central Coast on Saturday morning. In its wake, a steep pressure gradient was expected along the California coastline, bringing moderate gale-force to fresh gale-force (32 to 46 mph) northwesterly winds in the coastal regions Saturday afternoon and evening. These winds will decrease to gale-force levels on Sunday, producing mostly clear to partly cloudy clear skies with a few scattered rain showers in the inland areas. Santa Lucia (northeasterly) winds will develop Sunday morning and will produce clear skies throughout the Central Coast and warmer air temperatures, followed by strong to gale-force (25 to 32 mph) northwesterly winds Sunday afternoon and evening. A Catalina Eddy is expected to create gentle to moderate (8 to 18 mph) northwesterly winds and will allow the marine layer with areas of fog and mist (May Gray) to develop in the coastal regions on Monday through Thursday. Away from the ocean, the inland valleys (Paso Robles) will reach into the low to mid-80s, while the coastal valleys (San Luis Obispo) will remain in the mid-70s. The beaches this afternoon will range between the high 50s to the low 60s. Strong to gale-force (25 to 38 mph) northwesterly winds will produce mostly clear skies throughout the Central Coast next Friday and Saturday afternoon. Long-range numerical models suggest a dry weather pattern through the third week of May. However, forecasting springtime precipitation is notoriously tricky — longer days and increased sunshine add instability to the atmosphere, allowing weather patterns to shift rapidly. Moderate gale-force to fresh gale-force (32 to 46 mph) northwesterly winds along the California coastline will generate a 12- to 14-foot northwesterly (310-degree deep water) sea and swell (with a 5- to 11-second period) on Saturday, decreasing to 9 to 11 feet on Sunday. A 5- to 7-foot northwesterly (290-degree deep water) swell (with an 8- to 12-second period) is forecast along our coastline on Monday, decreasing to 3 to 5 feet (with an 8- to 11-second period) on Tuesday into Friday morning. Increasing northwesterly winds will generate increasing northwesterly sea and swell on Friday afternoon through next week. Combined with this northwesterly sea and swell will be a 2- to 3-foot Southern Hemisphere (210-degree deep water) swell (with a 14- to 18-second period) on Sunday into Friday. Surface seawater temperatures will range between 49 and 52 degrees through Sunday, increasing to 52 to 54 degrees on Monday through Friday. 1812: A storm produced snow from Philadelphia to Maine. One foot of snow fell near Keene, New Hampshire, while 9 inches of snow fell on Waltham, Massachusetts, which is located near Boston. (David Ludlum) 2015: Wave heights across south facing beaches in the Southern California Bight reached well over 12-feet-tall. Overall, this was one of the larger Southern Hemisphere swells over the past few years. LOWS AND HIGHS, PASO ROBLES SUN MON TUE WED THU FRI SAT SUN 43, 70 45, 72 46, 72 47, 77 49, 83 50, 85 51, 85 51, 86 LOWS AND HIGHS, SAN LUIS OBISPO AND COASTAL VALLEYS SUN MON TUE WED THU FRI SAT SUN 45, 64 48, 65 50, 67 51, 70 52, 74 53, 75 54, 76 54, 77 John Lindsey is a retired PG&E marine meteorologist. Email him at JohnLindseyLosOsos@ or follow him on X @PGE_John.
Yahoo
06-04-2025
- Climate
- Yahoo
Hey there, spring! SLO County weather forecast calls for warm, sunny week
A live data feed from the National Weather Service containing official weather warnings, watches, and advisory statements. Tap warning areas for more details. Sources: NOAA, National Weather Service, NOAA GeoPlatform and Esri. Open Steve Wilson swilson@ San Luis Obispo County can expect a warm and sunny week — with lots of pollen in the air. A strong ridge of high pressure over Central and Southern California will keep the storm track to the north of the Central Coast. This week, the inland and coastal valleys will also experience the warmest temperatures of the year so far under mostly sunny skies. A pattern of gentle to moderate (8 to 18 mph) Santa Lucia (northeasterly) winds developing during the night and morning, shifting out of the northwest and increasing to fresh to strong (19 to 31 mph) levels during the afternoon will continue through Monday. This pattern will produce Chamber of Commerce weather with high temperatures reaching the mid-70s with good visibility. However, at this time of year, when the wind shifts out of the northeast (offshore) and blows from the land to the ocean, they transport pollen from the grasses and trees in the inland valleys and mountains toward the sea. At times like these, communities throughout the Central Coast will experience higher pollen counts. A series of cold fronts will move through the Pacific Northwest, setting up steep pressure gradients along the Central California coastline. In turn, strong to gale-force (25 to 38 mph with gusts to 45 mph) northwesterly winds will begin on Tuesday and continue through Saturday. In fact, the northwesterly winds could reach moderate gale force to fresh gale force (32 to 46 mph) levels on Friday into Saturday. These northwesterly winds will produce cooler seawater temperatures. As the winds blow parallel to our coastline, the friction causes ocean surface water to move. Because of the Coriolis effect, the surface water flows to the right or offshore. That, in turn, causes upwelling along the coast as cold, clear and nutrient-rich water rises from the ocean's depths to the surface along the immediate shoreline to replace the shallow water that is pushed out to sea. High temperatures in the inland (Paso Robles) and coastal valleys (San Luis Obispo) will reach the 80s on Tuesday through Thursday, and only the 60s along most of the coastline. The southerly-facing beaches of Cayucos, Avila Beach and Shell Beach, however, will reach the 80s. The ridge of high pressure will weaken, allowing a cold front to produce rain throughout the Central Coast next Sunday and Monday. Total rainfall should range between 0.10 and 0.33 of an inch. Snow levels will drop to 4,500 feet, and high air temperatures will struggle to reach the 60s. At this time of the year, more potential instability develops in the atmosphere due to the longer days, which often produce thunderstorms with hail, gusty winds, and the threat of lightning strikes. The long-range numerical models indicate an unsettled weather pattern with a chance of rain showers the following week. A 7- to 9-foot northwesterly (300-degree deep water) sea and swell (with a 7- to 17- second period) is forecast Sunday through Friday. Combined with this northwesterly sea and swell will be a 2- to 3-foot Southern Hemisphere (210-degree deep water) swell (with a 16- to 18-second period) on Thursday through Friday. Surface seawater temperatures will range between 51 and 53 degrees through Monday, decreasing to 49 and 51 degrees on Tuesday through Wednesday. Seawater temperatures will further lower to 48 to 50 degrees on Thursday through Saturday. 1989: Unseasonably hot weather prevailed in California. Afternoon highs of 91 degrees in downtown San Francisco, 93 degrees in San Jose, 98 degrees in San Diego, 103 degrees in Santa Maria, 104 degrees in Riverside and 106 degrees in downtown Los Angeles established records for the month of April. 2016: It was warm but not hot enough to break any daily records from the 1989 heatwave. Paso Robles reached 88 degrees, well below the daily record of 98 degrees set in 1989. Santa Maria hit 94 degrees, short of the 103 degree record from 1989. The San Luis Obispo County Regional Airport saw 97 degrees, nearly tying the record of 98 degrees from 1989. The 1989 heatwave event produced seven days of record-high temperatures from April 5 to 11 at the Paso Robles Municipal Airport. 2020: A storm produced nearly 4 inches of rain at Rocky Butte and 3.3 inches at Prefumo Canyon Crest Inn on top of the Irish Hills due to orographic enhancement. LOWS AND HIGHS, PASO ROBLES SUN MON TUE WED THU FRI SAT SUN 46, 79 45, 76 46, 81 47, 84 46, 87 43, 79 42, 74 40, 70 LOWS AND HIGHS, SAN LUIS OBISPO AND COASTAL VALLEYS SUN MON TUE WED THU FRI SAT SUN 52, 76 50, 74 51, 80 53, 83 56, 84 53, 77 50, 72 49, 68 John Lindsey is a retired PG&E marine meteorologist. Email him at JohnLindseyLosOsos@ or follow him on X @PGE_John.
