Alert archive / California / Frost Advisories in 2019
Frost Advisory 10, NWS San Diego, CA
NWS San Diego, CA issued this frost advisory at Oct 27, 2019, 11:41 AM PDT for San Bernardino County, California. It took effect at Oct 28, 2019, 2:00 AM PDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Oct 27, 2019, 11:41 AM PDT (18:41 UTC)
- In effect from
- Oct 28, 2019, 2:00 AM PDT
- Expired
- Oct 28, 2019, 9:00 AM PDT
- In force
- 7 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 18:38 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, 6.7 hours before the alert went out and 246 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
- 1702 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 144 m²/s²
- 0-3 km storm-relative helicity
- 206 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this frost advisory 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 frost advisory went out at Oct 27, 9:33 AM PDT, 2 hours 8 minutes earlier.
Area forecast discussion, Oct 27, 9:33 AM PDT, 2 hours 8 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 |
|---|---|---|---|---|
| Oct 27, 3:46 AM PDT | High Wind Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 32 hr |
| Oct 27, 1:00 PM PDT | Fire Weather Watch | SGX | Orange, Riverside, San Bernardino, San Diego | 25 hr |
Nearby
Frost Advisories in California, 2019Every frost advisory 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.