Alert archive / California / Areal Flood Advisories in 2021
Areal Flood Advisory 49, NWS San Diego, CA
NWS San Diego, CA issued this areal flood advisory at Dec 14, 2021, 8:09 AM PST for Orange County, California. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Dec 14, 2021, 8:09 AM PST (16:09 UTC)
- Expired
- Dec 14, 2021, 12:15 PM PST
- In force
- 4 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
County Orange County, CA
The nearest sounding before it
Vandenberg AFB, CA (KVBG), launched 12:00Z, 4.2 hours before the alert went out and 277 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 27 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 531 m above ground
- 0-6 km bulk shear
- 81 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood advisory went out, 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 this areal flood advisory went out at Dec 14, 2:32 AM PST, 5 hours 37 minutes earlier.
Area forecast discussion, Dec 14, 2:32 AM PST, 5 hours 37 minutes before
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</html>In the hours before
Local storm report, Dec 14, 7:39 AM PST, 30 minutes before
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</html>Local storm report, Dec 14, 7:47 AM PST, 22 minutes before
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<main class="wrap">
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<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.
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</html>Local storm report, Dec 14, 7:49 AM PST, 20 minutes before
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<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.
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</html>The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 14, 7:34 AM PST | Areal Flood Advisory | SGX | Orange, Riverside | 4 hr |
| Dec 14, 9:23 AM PST | Areal Flood Advisory | SGX | San Bernardino | 4 hr |
| Dec 14, 10:36 AM PST | Flash Flood Warning | SGX | Orange | 3 hr |
| Dec 14, 11:01 AM PST | Flash Flood Warning | SGX | Orange | 89 min |
| Dec 14, 11:46 AM PST | Areal Flood Advisory | SGX | San Diego | 3 hr |
| Dec 14, 1:00 PM PST | Areal Flood Advisory | SGX | Riverside, San Bernardino | 3 hr |
| Dec 14, 1:15 PM PST | Areal Flood Advisory | SGX | San Diego | 3 hr |
| Dec 14, 1:27 PM PST | Flash Flood Warning | SGX | Riverside, San Bernardino | 108 min |
Nearby
Areal Flood Advisories in California, 2021Every areal flood advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.