A closed upper low pressure system produced light to moderate rainfall, isolated thunderstorms and light snow in the mountains February 12 to 13, with most of the impacts felt in San Diego County. The heaviest and most widespread rain occurred from the coastal slopes towards the coast in San Diego County, where isolated lightning was observed.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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 low pressure system produced light to moderate rainfall, isolated thunderstorms and light snow in the mountains February 12 to 13, with most of the impacts felt in San Diego County. The heaviest and most widespread rain occurred from the coastal slopes towards the coast in San Diego County, where isolated lightning was observed. Also, light snow was reported in the mountains in San Diego County and Riverside County.
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 Feb 12, 1:29 PM PST, 31 minutes earlier.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>The national radar mosaic for the moment the first event began.
2 heavy snow, 1 heavy rain. Local standard time, as filed.
Snow fell across the San Diego County Mountains in the afternoon on February 12 through mid-morning on February 13. Storm total snowfall of 3.5 inches was reported at Birch Hill.
Widespread rainfall occurred on the afternoon and evening of February 12, developing across the coastal mountain slopes and moving westward towards the coast in San Diego County. Lightning was reported across coastal areas as well as the deserts. The heaviest rainfall occurred across the valleys where general 0.50-0.75 were reported, with the highest amount of 1.39 recorded at Harbison Canyon.
Snow fell across the Riverside County Mountains early in the morning on February 13. The Mt San Jacinto Long Valley Ranger Station at the top of the Palm Springs Tram reported 3 inches of snow at 8400 feet.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2023Every state in 2023This day in weather historyWarnings in California, February 2023
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 2026-10-01. Each event’s entry at NCEI: 1075062, 1078877, 1075056.