Alert archive / California / Winter Storm Warnings in 2023
Winter Storm Warning 1, NWS San Diego, CA
NWS San Diego, CA issued this winter storm warning at Jan 4, 2023, 2:23 AM PST for San Bernardino County, California. It took effect at Jan 5, 2023, 4:00 AM PST. It was in force for 18 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jan 4, 2023, 2:23 AM PST (10:23 UTC)
- In effect from
- Jan 5, 2023, 4:00 AM PST
- Expired
- Jan 5, 2023, 10:00 PM PST
- In force
- 18 hr
- Issued by
- NWS San Diego, CA
County San Bernardino County, CA
The radar
The Edwards AFB radar (KEYX), 129 km from the middle of the area, began a volume at 10:25 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
Las Vegas, NV (KVEF), launched 00:00Z, 10.4 hours before the alert went out and 180 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
- 1356 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 244 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter storm 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 winter storm warning went out at Jan 3, 9:49 PM PST, 4 hours 34 minutes earlier.
Area forecast discussion, Jan 3, 9:49 PM PST, 4 hours 34 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 |
|---|---|---|---|---|
| Jan 3, 9:19 PM PST | Coastal Flood Advisory | SGX | Orange, San Diego | 69 hr |
| Jan 3, 9:19 PM PST | High Surf Warning | SGX | San Diego | 69 hr |
| Jan 3, 9:19 PM PST | High Surf Advisory | SGX | Orange | 69 hr |
| Jan 3, 9:27 PM PST | Gale Warning | SGX | 43 hr | |
| Jan 4, 2:23 AM PST | Winter Weather Advisory | SGX | Riverside | 44 hr |
Nearby
Winter Storm Warnings in California, 2023Every winter storm warning in 2023
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.