Alert archive / California / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 11, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Sep 4, 2019, 1:31 PM PDT for San Diego County, California. It was in force for 59 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
- Sep 4, 2019, 1:31 PM PDT (20:31 UTC)
- Expired
- Sep 4, 2019, 2:30 PM PDT
- In force
- 59 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County San Diego County, CA
The radar
The San Diego radar (KNKX), 28 km from the middle of the area, began a volume at 20:34 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, 8.5 hours before the alert went out and 47 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
- 124 J/kg
- Mixed-layer CIN
- -638 J/kg
- Mixed-layer LCL
- 1707 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- 18 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 San Diego, CA wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 4, 10:00 AM PDT, 3 hours 31 minutes earlier.
Area forecast discussion, Sep 4, 10:00 AM PDT, 3 hours 31 minutes before
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</html>The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 1:48 PM PDT | Flash Flood Warning | SGX | San Diego | 94 min |
| Sep 4, 2:33 PM PDT | Special Weather Statement | SGX | San Diego | 57 min |
| Sep 4, 2:44 PM PDT | Beach Hazards Statement | SGX | San Diego | 2 hr |
| Sep 4, 3:12 PM PDT | Special Weather Statement | SGX | San Diego | 63 min |
| Sep 4, 3:18 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 65 min |
| Sep 4, 3:19 PM PDT | Severe Thunderstorm Warning | SGX | Riverside, San Diego | 56 min |
Nearby
Severe Thunderstorm Warnings in California, 2019Every severe thunderstorm warning in 2019
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.