Alert archive / California / Areal Flood Advisories in 2012
Areal Flood Advisory 21, NWS Los Angeles, CA
NWS Los Angeles, CA issued this areal flood advisory at Aug 13, 2012, 12:39 PM PDT for Los Angeles County, California. It was in force for 111 min.
The area
The counties it named.
The facts
- Issued
- Aug 13, 2012, 12:39 PM PDT (19:39 UTC)
- Expired
- Aug 13, 2012, 2:30 PM PDT
- In force
- 111 min
- Issued by
- NWS Los Angeles, CA
- Area
- Storm-based polygon
County Los Angeles County, CA
The radar
The Santa Ana Mts radar (KSOX), 71 km from the middle of the area, began a volume at 19:41 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 7.7 hours before the alert went out and 184 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
- 446 J/kg
- Mixed-layer CIN
- -661 J/kg
- Mixed-layer LCL
- 1527 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 67 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 Los Angeles, CA wrote its last area forecast discussion before this areal flood advisory went out at Aug 13, 11:30 AM PDT, 1 hour 9 minutes earlier.
Area forecast discussion, Aug 13, 11:30 AM PDT, 1 hour 9 minutes before
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</html>Hazardous weather outlook, Aug 13, 6:00 AM PDT, 6 hours 39 minutes before
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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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<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 Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 9:05 PM PDT | Small Craft Advisory | LOX | 6 hr | |
| Aug 12, 9:47 PM PDT | Excessive Heat Warning | LOX | Los Angeles | 22 hr |
| Aug 13, 2:36 PM PDT | Small Craft Advisory | LOX | 9 days | |
| Aug 13, 2:42 PM PDT | Areal Flood Advisory | LOX | 108 min | |
| Aug 13, 4:30 PM PDT | Areal Flood Advisory | LOX | Los Angeles | 3 hr |
Nearby
Areal Flood Advisories in California, 2012Every areal flood advisory in 2012
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; radar from the NEXRAD Level II archive.