Alert archive / California / Flash Flood Watches in 2016
Flash Flood Watch 8, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood watch at Nov 19, 2016, 4:29 PM PST for Los Angeles County, California. It took effect at Nov 20, 2016, 4:00 AM PST. It was in force for 26 hr.
The area
The counties it named.
The facts
- Issued
- Nov 19, 2016, 4:29 PM PST (00:29 UTC)
- In effect from
- Nov 20, 2016, 4:00 AM PST
- Expired
- Nov 21, 2016, 6:00 AM PST
- In force
- 26 hr
- Issued by
- NWS Los Angeles, CA
- Flood severity
- None
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 00:29 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, 0.5 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
- 3096 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 184 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch 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 flash flood watch went out at Nov 19, 4:18 PM PST, 11 minutes earlier.
Area forecast discussion, Nov 19, 4:18 PM PST, 11 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 |
|---|---|---|---|---|
| Nov 20, 11:52 AM PST | Winter Weather Advisory | LOX | 25 hr | |
| Nov 20, 1:31 PM PST | Areal Flood Advisory | LOX | Los Angeles | 119 min |
| Nov 20, 2:17 PM PST | Small Craft Advisory for Hazardous Seas | LOX | 19 hr | |
| Nov 20, 3:04 PM PST | Areal Flood Advisory | LOX | San Luis Obispo, Santa Barbara | 6 hr |
Nearby
Flash Flood Watches in California, 2016Every flash flood watch in 2016
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.