Alert archive / California / Severe Thunderstorm Warnings in 2006
Severe Thunderstorm Warning 10, NWS Los Angeles, CA
NWS Los Angeles, CA issued this severe thunderstorm warning at Jul 20, 2006, 12:25 PM PDT for Los Angeles County, California. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 20, 2006, 12:25 PM PDT (19:25 UTC)
- Expired
- Jul 20, 2006, 1:07 PM PDT
- In force
- 42 min
- Issued by
- NWS Los Angeles, CA
- Area
- Counties, with a storm outline in the text
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 19:28 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
Edwards AFB, CA (KEDW), launched 12:00Z, 7.4 hours before the alert went out and 89 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
- 265 J/kg
- Mixed-layer CIN
- -361 J/kg
- Mixed-layer LCL
- 2439 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 20, 9:45 AM PDT, 2 hours 40 minutes earlier.
Area forecast discussion, Jul 20, 9:45 AM PDT, 2 hours 40 minutes before
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</html>Hazardous weather outlook, Jul 20, 6:00 AM PDT, 6 hours 25 minutes before
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
The office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 3:57 AM PDT | Flash Flood Watch | LOX | Santa Barbara | 16 hr |
| Jul 20, 5:28 AM PDT | Excessive Heat Watch | LOX | Los Angeles | 10 hr |
| Jul 20, 3:00 PM PDT | Excessive Heat Watch | LOX | Los Angeles, Santa Barbara | 25 hr |
| Jul 20, 3:00 PM PDT | Excessive Heat Warning | LOX | Los Angeles | 27 hr |
| Jul 20, 4:23 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles | 67 min |
| Jul 20, 4:52 PM PDT | Flash Flood Warning | LOX | Los Angeles | 83 min |
Nearby
Severe Thunderstorm Warnings in California, 2006Every severe thunderstorm warning in 2006
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.