Alert archive / California / Frost Advisories in 2015
Frost Advisory 11, NWS San Diego, CA
NWS San Diego, CA issued this frost advisory at Dec 14, 2015, 9:40 AM PST for Riverside County, San Bernardino County, San Diego County, California. It took effect at Dec 14, 2015, 11:00 PM PST. It was in force for 33 hr.
The area
The counties it named.
The facts
- Issued
- Dec 14, 2015, 9:40 AM PST (17:40 UTC)
- In effect from
- Dec 14, 2015, 11:00 PM PST
- Expired
- Dec 16, 2015, 8:00 AM PST
- In force
- 33 hr
- Issued by
- NWS San Diego, CA
Counties Riverside County, CA, San Bernardino County, CA, San Diego County, CA
The radar
The Santa Ana Mts radar (KSOX), 122 km from the middle of the area, began a volume at 17:41 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, 5.7 hours before the alert went out and 145 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
- 29 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1147 m above ground
- 0-6 km bulk shear
- 80 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 50 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 Dec 14, 9:30 AM PST, 10 minutes earlier.
Area forecast discussion, Dec 14, 9:30 AM PST, 10 minutes before
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Local storm report, Dec 14, 6:41 AM PST, 2 hours 59 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 |
|---|---|---|---|---|
| Dec 13, 8:42 PM PST | Gale Warning | SGX | 23 hr | |
| Dec 14, 12:58 PM PST | Small Craft Advisory | SGX | 13 hr |
Nearby
Frost Advisories in California, 2015Every frost advisory in 2015
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.