####018011598#### FNUS86 KLOX 302236 FWLLOX ECCDA Discussions National Weather Service Los Angeles/Oxnard CA 336 PM PDT Wed Apr 30 2025 ECC029-011645- Los Padres National Forest- Discussion for Vandenberg ECC Dispatch 336 PM PDT Wed Apr 30 2025 ...Discussion from Monterey... Temperatures have generally cooled most places since Tuesday afternoon, though it is still warm inland while it is cool with stratus and fog along much of the coast and in nearby coastal valleys. A dry and weak upper level trough was located over the district this afternoon. The trough will continue to move southward reaching southern California late tonight and Thursday morning. Weak high pressure will then build in over the district Thursday and Friday. A cold front will move through Saturday with northwest winds becoming gusty over the weekend. Note : All winds are 20-foot Winds Unless otherwise specified. Thunderstorms imply strong, gusty and erratic winds. ...Discussion from Los Angeles/Oxnard... A weak low pressure system has led to some cooler temperatures, and a 30 to 50 percent chance of showers across the interior mountains, valleys, and deserts. Additionally there is a 20 to 30 percent chance of thunderstorms Thursday afternoon and evening (focused over the interior areas). With any storms, there is the potential for heavy downpour, lighting, gusty winds, and hail. Overall rain totals and rates are expected to be under 0.1 inches for most areas, and 0.5 inches across the mountains and foothills. However, in a thunderstorm rain rates have the chance to exceed 1 inch per hour. There is a 5 percent chance of of minor or shallow debris flows over recent burn scars that are away from the coast. Today into the weekend, humidities will trend upwards with most areas remaining above 30 percent (except for 15 to 25 percent in the Antelope Valley). Onshore flow will dominate, with gusts of 20 to 35 mph across the Antelope Valley and foothills in the afternoons and evenings, strongest today and Saturday. Gusts 20 to 35 mph will also be possible across interior mountains and valleys today and Thursday afternoon. This weekend an unseasonably cold low pressure storm system is likely to pass over the region. This brings the potential for widespread showers, mountain snow (down to as low as 4000 feet), and a 10 to 20 percent chance of thunderstorms. Low confidence in details for the precipitation, but high confidence in gusty northwest to southwest winds (possibly Advisory Level and/or Warning level) across much of the region. $$ ECC028-011645- Santa Barbara County excluding Los Padres National Forest- Discussion for Santa Barbara ECC Dispatch 336 PM PDT Wed Apr 30 2025 A weak low pressure system has led to some cooler temperatures, and a 30 to 50 percent chance of showers across the interior mountains, valleys, and deserts. Additionally there is a 20 to 30 percent chance of thunderstorms Thursday afternoon and evening (focused over the interior areas). With any storms, there is the potential for heavy downpour, lighting, gusty winds, and hail. Overall rain totals and rates are expected to be under 0.1 inches for most areas, and 0.5 inches across the mountains and foothills. However, in a thunderstorm rain rates have the chance to exceed 1 inch per hour. There is a 5 percent chance of of minor or shallow debris flows over recent burn scars that are away from the coast. Today into the weekend, humidities will trend upwards with most areas remaining above 30 percent (except for 15 to 25 percent in the Antelope Valley). Onshore flow will dominate, with gusts of 20 to 35 mph across the Antelope Valley and foothills in the afternoons and evenings, strongest today and Saturday. Gusts 20 to 35 mph will also be possible across interior mountains and valleys today and Thursday afternoon. This weekend an unseasonably cold low pressure storm system is likely to pass over the region. This brings the potential for widespread showers, mountain snow (down to as low as 4000 feet), and a 10 to 20 percent chance of thunderstorms. Low confidence in details for the precipitation, but high confidence in gusty northwest to southwest winds (possibly Advisory Level and/or Warning level) across much of the region. $$ ECC031-011645- Angeles National Forest- Discussion for Lancaster ECC Dispatch 336 PM PDT Wed Apr 30 2025 A weak low pressure system has led to some cooler temperatures, and a 30 to 50 percent chance of showers across the interior mountains, valleys, and deserts. Additionally there is a 20 to 30 percent chance of thunderstorms Thursday afternoon and evening (focused over the interior areas). With any storms, there is the potential for heavy downpour, lighting, gusty winds, and hail. Overall rain totals and rates are expected to be under 0.1 inches for most areas, and 0.5 inches across the mountains and foothills. However, in a thunderstorm rain rates have the chance to exceed 1 inch per hour. There is a 5 percent chance of of minor or shallow debris flows over recent burn scars that are away from the coast. Today into the weekend, humidities will trend upwards with most areas remaining above 30 percent (except for 15 to 25 percent in the Antelope Valley). Onshore flow will dominate, with gusts of 20 to 35 mph across the Antelope Valley and foothills in the afternoons and evenings, strongest today and Saturday. Gusts 20 to 35 mph will also be possible across interior mountains and valleys today and Thursday afternoon. This weekend an unseasonably cold low pressure storm system is likely to pass over the region. This brings the potential for widespread showers, mountain snow (down to as low as 4000 feet), and a 10 to 20 percent chance of thunderstorms. Low confidence in details for the precipitation, but high confidence in gusty northwest to southwest winds (possibly Advisory Level and/or Warning level) across much of the region. $$ ECC024-011645- San Luis Obispo County- Discussion for San Luis Obispo ECC Dispatch 336 PM PDT Wed Apr 30 2025 A weak low pressure system has led to some cooler temperatures, and a 30 to 50 percent chance of showers across the interior mountains, valleys, and deserts. Additionally there is a 20 to 30 percent chance of thunderstorms Thursday afternoon and evening (focused over the interior areas). With any storms, there is the potential for heavy downpour, lighting, gusty winds, and hail. Overall rain totals and rates are expected to be under 0.1 inches for most areas, and 0.5 inches across the mountains and foothills. However, in a thunderstorm rain rates have the chance to exceed 1 inch per hour. There is a 5 percent chance of of minor or shallow debris flows over recent burn scars that are away from the coast. Today into the weekend, humidities will trend upwards with most areas remaining above 30 percent (except for 15 to 25 percent in the Antelope Valley). Onshore flow will dominate, with gusts of 20 to 35 mph across the Antelope Valley and foothills in the afternoons and evenings, strongest today and Saturday. Gusts 20 to 35 mph will also be possible across interior mountains and valleys today and Thursday afternoon. This weekend an unseasonably cold low pressure storm system is likely to pass over the region. This brings the potential for widespread showers, mountain snow (down to as low as 4000 feet), and a 10 to 20 percent chance of thunderstorms. Low confidence in details for the precipitation, but high confidence in gusty northwest to southwest winds (possibly Advisory Level and/or Warning level) across much of the region. $$ ECC032-011645- Ventura County excluding Los Padres National Forest- Discussion for Ventura ECC Dispatch 336 PM PDT Wed Apr 30 2025 A weak low pressure system has led to some cooler temperatures, and a 30 to 50 percent chance of showers across the interior mountains, valleys, and deserts. Additionally there is a 20 to 30 percent chance of thunderstorms Thursday afternoon and evening (focused over the interior areas). With any storms, there is the potential for heavy downpour, lighting, gusty winds, and hail. Overall rain totals and rates are expected to be under 0.1 inches for most areas, and 0.5 inches across the mountains and foothills. However, in a thunderstorm rain rates have the chance to exceed 1 inch per hour. There is a 5 percent chance of of minor or shallow debris flows over recent burn scars that are away from the coast. Today into the weekend, humidities will trend upwards with most areas remaining above 30 percent (except for 15 to 25 percent in the Antelope Valley). Onshore flow will dominate, with gusts of 20 to 35 mph across the Antelope Valley and foothills in the afternoons and evenings, strongest today and Saturday. Gusts 20 to 35 mph will also be possible across interior mountains and valleys today and Thursday afternoon. This weekend an unseasonably cold low pressure storm system is likely to pass over the region. This brings the potential for widespread showers, mountain snow (down to as low as 4000 feet), and a 10 to 20 percent chance of thunderstorms. Low confidence in details for the precipitation, but high confidence in gusty northwest to southwest winds (possibly Advisory Level and/or Warning level) across much of the region. $$ ECC030-011645- Los Angeles County excluding Angeles National Forest- Discussion for Los Angeles ECC Dispatch 336 PM PDT Wed Apr 30 2025 A weak low pressure system has led to some cooler temperatures, and a 30 to 50 percent chance of showers across the interior mountains, valleys, and deserts. Additionally there is a 20 to 30 percent chance of thunderstorms Thursday afternoon and evening (focused over the interior areas). With any storms, there is the potential for heavy downpour, lighting, gusty winds, and hail. Overall rain totals and rates are expected to be under 0.1 inches for most areas, and 0.5 inches across the mountains and foothills. However, in a thunderstorm rain rates have the chance to exceed 1 inch per hour. There is a 5 percent chance of of minor or shallow debris flows over recent burn scars that are away from the coast. Today into the weekend, humidities will trend upwards with most areas remaining above 30 percent (except for 15 to 25 percent in the Antelope Valley). Onshore flow will dominate, with gusts of 20 to 35 mph across the Antelope Valley and foothills in the afternoons and evenings, strongest today and Saturday. Gusts 20 to 35 mph will also be possible across interior mountains and valleys today and Thursday afternoon. This weekend an unseasonably cold low pressure storm system is likely to pass over the region. This brings the potential for widespread showers, mountain snow (down to as low as 4000 feet), and a 10 to 20 percent chance of thunderstorms. Low confidence in details for the precipitation, but high confidence in gusty northwest to southwest winds (possibly Advisory Level and/or Warning level) across much of the region. $$