Alert archive / California / Flash Flood Watches in 2020
Flash Flood Watch 3, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood watch at Apr 6, 2020, 1:22 PM MST for La Paz County, Yuma County, Arizona; Imperial County, Riverside County, San Bernardino County, California. It took effect at Apr 7, 2020, 11:00 AM MST. It was in force for 31 hr.
The area
The counties it named.
The facts
- Issued
- Apr 6, 2020, 1:22 PM MST (20:22 UTC)
- In effect from
- Apr 7, 2020, 11:00 AM MST
- Expired
- Apr 8, 2020, 6:00 PM MST
- In force
- 31 hr
- Issued by
- NWS Phoenix, AZ
- Flood severity
- None
Counties La Paz County, AZ, Yuma County, AZ, Imperial County, CA, Riverside County, CA, San Bernardino County, CA
The radar
The Yuma radar (KYUX), 132 km from the middle of the area, began a volume at 20:22 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, 8.4 hours before the alert went out and 217 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
- 18 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 530 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 160 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
Nearby
Flash Flood Watches in California, 2020Flash Flood Watches in Arizona, 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.