Snow Valley
Stoke today Oct 21
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0.0″
best available forecast · as of Oct 21 15:56
NWS 0.0″ · Open-Meteo 0.0″
Last 24 hours measured
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Next 48 hours
10-day outlook
Forecast data: National Weather Service; Weather data by Open-Meteo.com (CC BY 4.0); Data from MET Norway (CC BY 4.0) — adapted by SnowAlert.
In the forecaster’s words
Today
A chance of rain showers after 11am. Mostly sunny, with a high near 53. South wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
This Afternoon
Rain showers likely. Mostly cloudy, with a high near 55. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Tonight
Rain showers likely before 11pm, then showers and thunderstorms. Cloudy, with a low around 40. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Thursday
Rain showers before 8am, then rain and snow showers between 8am and 11am, then showers and thunderstorms between 11am and 5pm, then rain and snow showers likely. Cloudy, with a high near 44. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Rain and snow showers likely before 11pm. Mostly cloudy, with a low around 34. Southwest wind 0 to 10 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Friday
Sunny, with a high near 47. North wind 0 to 5 mph.
Forecast discussion SGX · Oct 21 04:55
A low pressure system moving southward off the California coast will bring general cooling through Thursday. It is also expected to produce showers and a slight chance of thunderstorms for late today through Thursday as it moves inland through California into Nevada. Warmer and drier for the weekend. Offshore flow on Saturday could produce gusty northeast to east winds in and below mountain passes and canyons as well as the Inland Empire corridor between the Cajon Pass and the Santa Ana Mountains. The offshore flow weakens for Sunday into early next week.
Read the full discussion
000 FXUS66 KSGX 211155 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 455 AM PDT Wed Oct 21 2026 .SYNOPSIS... A low pressure system moving southward off the California coast will bring general cooling through Thursday. It is also expected to produce showers and a slight chance of thunderstorms for late today through Thursday as it moves inland through California into Nevada. Warmer and drier for the weekend. Offshore flow on Saturday could produce gusty northeast to east winds in and below mountain passes and canyons as well as the Inland Empire corridor between the Cajon Pass and the Santa Ana Mountains. The offshore flow weakens for Sunday into early next week. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... ...UPDATED AVIATION DISCUSSION... .SHORT TERM (Today through Friday)... The center of a closed low pressure system will move slowly eastward to a position near Point Conception by Thursday morning, then move more rapidly northeastward into Nevada by late Thursday evening. This will continue the cooling trend through Thursday with Thursday high temperatures as much as 15 to 20 degrees below average for the mountains. High temperatures on Thursday for the coast and valleys will be mostly in the 60s to around 70 with the mountains in the 40s and 50s. An initial band of showers and isolated thunderstorms will move into coastal areas inland to the mountains during the afternoon and early evening with a second round during the late evening and overnight. Instability will increase overnight as colder air aloft moves across record warm coastal waters for this time in October, around 7 degrees warmer than the long-term average. While coverage of precipitation may be less overnight, there is greater potential for brief higher-intensity rainfall from isolated thunderstorms and stronger showers. Additional showers will continue on Thursday along with a slight chance of thunderstorms during the afternoon. The greater coverage is expected for Orange and southwestern San Bernardino Counties from the coast to the mountains. Showers will continue into Thursday evening, then decrease and end from the northwest late Thursday night and early Friday. Through Thursday night for Orange and southwestern San Bernardino Counties, rainfall is expected to range from around 0.75 inch near the coast to 1 to 1.5 inches for the San Bernardino County mountains. For San Diego County, rainfall will decrease from north to south with 0.75 to locally 1 inch over northwestern San Diego County to 0.25 to 0.50 inch across far southern San Diego County. NBM probabilities for 0.10 inch or more of rainfall through Thursday night exceed 90 percent for the coast, valleys, and mountains. Probabilities for 0.50 inch or more exceed 80 percent from the coast to the mountains. Probabilities for 1 inch or more exceed 50 percent from the coast to the mountains for Orange and southwestern San Bernardino Counties into northwestern San Diego County. Probabilities for 2 inches or more exceed 10 percent from inland Orange County to the mountains of southwestern San Bernardino County and are as high as 20 to 30 percent on the coastal slopes of the San Bernardino County mountains. Warming and drying will begin on Friday with high temperatures a few to around 5 degrees warmer than Thursday. && .LONG TERM (Saturday through Tuesday)... Greater warming will occur on Saturday followed by slower warming for Sunday and Monday. For next Monday, high temperatures for coastal areas will be 5 to locally 10 degrees above average with the mountains and deserts a few to around 5 degrees below average. High temperatures on Monday will be mostly in the 70s and lower 80s for the coast and valleys, in the 50s and 60s for the mountains, and into the lower to mid 80s for the lower deserts. && .AVIATION... 211130Z...SCT-BKN cloud layers around 2000 and 8000 feet MSL will continue into the afternoon. A band of RA/SHRA will move west to east through the region 21-06Z. Cigs will drop to 2500-3500 feet MSL and vis 3-6SM during this band's passage. A few embedded +SHRA/TSRA could produce brief and local IFR conditions. Winds shift from south to southwest and cigs lift to about 3000 feet MSL as the precip band passes after 11Z Thursday followed by SHRA. && .MARINE... A storm system will move through the coastal waters this afternoon through early Thursday. Southerly winds today will shift to southwest tonight, then westerly Thursday, with occasional wind gusts exceeding 20 knots. There is a 15-25% chance of TSRA after 22Z into Thursday. No hazardous marine conditions are expected Thursday night through Sunday. && .SKYWARN... Skywarn activation is not requested. However weather spotters are encouraged to report significant weather conditions. && .SGX WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...None. && $$ PUBLIC...17 AVIATION/MARINE...MM
Sources & last updated
- Data from MET Norway — CC BY 4.0, adapted by SnowAlert fetched Oct 21 14:03
- National Weather Service fetched Oct 21 15:56
- Weather data by Open-Meteo.com, from the ECMWF and NOAA models — CC BY 4.0, adapted by SnowAlert fetched Oct 21 15:05