Alert archive / California / High Surf Advisories in 2012
High Surf Advisory 18, NWS Los Angeles, CA
NWS Los Angeles, CA issued this high surf advisory at Aug 29, 2012, 7:28 PM PDT for Los Angeles County, California. It took effect at Aug 31, 2012, 6:00 AM PDT. It was in force for 29 hr.
The area
The counties it named.
The facts
- Issued
- Aug 29, 2012, 7:28 PM PDT (02:28 UTC)
- In effect from
- Aug 31, 2012, 6:00 AM PDT
- Expired
- Sep 1, 2012, 11:07 AM PDT
- In force
- 29 hr
- Issued by
- NWS Los Angeles, CA
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 02:31 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 00:00Z, 2.5 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2185 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this high surf 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 high surf advisory went out at Aug 29, 5:27 PM PDT, 2 hours 1 minute earlier.
Area forecast discussion, Aug 29, 5:27 PM PDT, 2 hours 1 minute before
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</html>Hazardous weather outlook, Aug 29, 6:00 AM PDT, 13 hours 28 minutes before
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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 30, 2:47 PM PDT | Areal Flood Advisory | LOX | 3 hr | |
| Aug 30, 2:58 PM PDT | Special Weather Statement | LOX | Los Angeles | 47 min |
| Aug 30, 4:01 PM PDT | Flash Flood Warning | LOX | Los Angeles | 2 hr |
| Aug 30, 4:14 PM PDT | Special Weather Statement | LOX | Los Angeles | 46 min |
Nearby
High Surf Advisories in California, 2012Every high surf 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.