Alert archive / California / Flash Flood Watches in 2020
Flash Flood Watch 2, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood watch at Aug 21, 2020, 2:04 PM PDT for Santa Barbara County, California. It took effect at Aug 22, 2020, 11:00 AM PDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Aug 21, 2020, 2:04 PM PDT (21:04 UTC)
- In effect from
- Aug 22, 2020, 11:00 AM PDT
- Expired
- Aug 22, 2020, 7:29 PM PDT
- In force
- 8 hr
- Issued by
- NWS Los Angeles, CA
- Flood severity
- None
County Santa Barbara County, CA
The radar
The Vandenberg AFB radar (KVBX), 47 km from the middle of the area, began a volume at 21:05 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, 9.1 hours before the alert went out and 326 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
- 61 J/kg
- Mixed-layer CIN
- -990 J/kg
- Mixed-layer LCL
- 2130 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -42 m²/s²
- 0-3 km storm-relative helicity
- -16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
Nearby
Flash Flood Watches in California, 2020Every flash flood watch in 2020
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.