A closed upper level low brought showers and thunderstorms to the region. 50 inch observed.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SGX wrote it up.
A closed upper level low brought showers and thunderstorms to the region. Coast and valley areas received the greatest amount of rainfall, with 0.25-0.50 inch observed. Mountain areas generally received less than 0.30 inch. A trained spotter in Wrightwood reported dime sized hail and lightning.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Diego, CA wrote its last area forecast discussion before the first event at May 6, 12:20 PM PST, 3 hours 40 minutes earlier.
Area Forecast Discussion National Weather Service San Diego CA 120 PM PDT Mon May 6 2019 .SYNOPSIS... Upper level low pressure moving inland across Southern California today will continue a threat of showers into Tuesday. There is also a slight chance of thunderstorms later today, mainly north of San Diego County. It will be a little warmer inland Wednesday as the marine layer thins slightly. But low pressure will strengthen aloft again late in the week, with more showers and cool weather likely by Friday and possibly through the upcoming weekend. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... At 1:00 PM PDT...Radar indicated a few showers over inland San Diego County west of the mts, some offshore of southern San Diego County, and some recent additions over the I.E., otherwise not much of significance. Similarly, rain gages over the past two hours were mostly dry. Isolated heavier showers produced up to one-third inch or so of rain in spots this morning, but most areas across the CWA have only light amounts or nothing to measure. A rainfall summary has been issued. Satellite imagery showed skies had cleared along the coast and some distance offshore, but remained abundant farther inland to the coastal slopes. The sfc pressure gradients were moderately onshore at 4-8 MBS (KSAN to the deserts) Peak wind gust reports were mostly in the 40-45 MPH range. There was a peak gust of 63 MPH recorded early this morning at Whitewater in the wind-prone San Gorgonio Pass. At Noon PDT...Water vapor imagery showed an upper level low center moving onshore near the western tip of Los Angeles County and drifting E-SE. No lightning has been detected from this system since at least Midnight. The heavier showers earlier this morning over San Diego County appeared to be supported by the left front exit region of a 90KT+ jet at 250 MBS. This support has moved SE, away from the area, and there has been a corresponding decrease in showers through midday. The latest short-range models (HRRR/WRFEMS) show further activity today will be concentrated farther inland near the mountains, and there still could be some isolated heavy cells as the cold core of the upper low drifts east across the I.E. at time of maximum diurnal heating. Due to the deep marine layer, and cyclonic flow aloft with embedded weak disturbances moving south over the area, scattered, light showers will likely continue into Tuesday along and west of the mts. More are possible Wednesday morning as well, but the bulk of the rainfall is expected today. Temperatures will remain well below average this week. Coldest today and Tuesday, and again by Fri/Sat. Even though cyclonic flow will persist aloft into midweek, it appears the marine layer will thin a bit, which would result in some modest warming inland. The hemispheric pattern will be highly amplified this week as a sharp ridge builds along the west coast of Canada and shortwave energy digs south over the western U.S. This evolves into a retrograding cut-off system late in the week. There is considerable uncertainty as to the eventual development and structure of this system, as it interacts with another low off the Coast, but numerous model runs, including the ensembles, confirm it will develop, and it will be near or over SoCal. Count on cool and unsettled conditions Friday into the weekend with periods of showers and even a few thunderstorms. There is a chance this system will affect a good portion of the CWA through the upcoming Mother's Day weekend. && .AVIATION... 062015Z...Coast/Valleys/Mountains...Mostly BKN low clouds with variable bases between 2000-6000 feet MSL with SCT SHRA and layers to above 10000 feet MSL will continue through early Tue morning. There is a slight chance of -TSRA in Orange/SW San Bernardino and W Riverside Counties this afternoon and evening. Areas of higher terrain will be obscured through Tuesday morning with local vis 2-4 miles in SHRA below the clouds. Deserts...Isolated-scattered -SHRA will be possible this afternoon through early Tuesday morning with cloud bases mostly 5000-8000 ft MSL. There is a slight chance of -TSRA mainly SW San Bernardino County. && .MARINE... No hazardous marine conditions expected through Saturday. && .BEACHES... South swell of 190 degrees/14 seconds will continue through Tuesday. In Orange County, expect surf mainly 3 to 5 feet and some strong rip currents. There is also a slight chance of thunderstorms and lightning this afternoon in Orange County. && .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...10 AVIATION/MARINE/BEACHES...Maxwell
Special Weather Statement National Weather Service San Diego CA 428 PM PDT MON MAY 6 2019 CAZ048-070100- San Bernardino and Riverside County Valleys-The Inland Empire CA- 428 PM PDT MON MAY 6 2019 ...SIGNIFICANT WEATHER ADVISORY FOR THE INLAND EMPIRE IN RIVERSIDE COUNTY UNTIL 600 PM PDT... At 424 PM PDT, Doppler radar was tracking several strong storms near Sun City, Perris, and 5 miles east of Murrieta. The storms were moving east at 10 mph. Dime size hail will be possible with these storms. Locations impacted include... Moreno Valley, Temecula, Lake Elsinore, Hemet, Murrieta, Perris, Menifee, Sun City, Lake Mathews and March Airforce Base. PRECAUTIONARY/PREPAREDNESS ACTIONS... This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. && LAT...LON 3351 11715 3383 11747 3390 11718 3361 11692 TIME...MOT...LOC 2324Z 275DEG 9KT 3374 11703 MGM
The national radar mosaic for the moment the first event began.
1 hail. Local standard time, as filed.
Trained spotter reported dime sized hail in Wrightwood on May 6th.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2019Every state in 2019This day in weather historyWarnings in California, May 2019
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 830636.