Alert archive / California / Winter Storm Warnings in 2010
Winter Storm Warning 10, NWS San Diego, CA
NWS San Diego, CA issued this winter storm warning at Dec 21, 2010, 4:18 AM PST for Riverside County, San Bernardino County, California. It took effect at Dec 22, 2010, 12:00 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
- Dec 21, 2010, 4:18 AM PST (12:18 UTC)
- In effect from
- Dec 22, 2010, 12:00 AM PST
- Expired
- Dec 22, 2010, 6:00 PM PST
- In force
- 18 hr
- Issued by
- NWS San Diego, CA
The radar
The Santa Ana Mts radar (KSOX), 152 km from the middle of the area, began a volume at 12:19 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, 0.3 hours before the alert went out and 195 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
- 1 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 439 m above ground
- 0-6 km bulk shear
- 83 kt
- 0-1 km storm-relative helicity
- 303 m²/s²
- 0-3 km storm-relative helicity
- 476 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 Dec 20, 9:30 PM PST, 6 hours 48 minutes earlier.
Area forecast discussion, Dec 20, 9:30 PM PST, 6 hours 48 minutes before
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</html>Hazardous weather outlook, Dec 20, 9:30 PM PST, 6 hours 48 minutes before
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Local storm report, Dec 20, 11:06 PM PST, 5 hours 12 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 20, 5:56 PM PST | Areal Flood Advisory | SGX | Riverside | 35 hr |
| Dec 20, 8:19 PM PST | Areal Flood Advisory | SGX | Orange, Riverside, San Bernardino, San Diego | 6 hr |
| Dec 20, 8:54 PM PST | Areal Flood Advisory | SGX | San Diego | 6 hr |
| Dec 20, 10:33 PM PST | Areal Flood Advisory | SGX | Riverside, San Bernardino | 4 hr |
| Dec 21, 2:55 AM PST | River Flood Warning | SGX | San Bernardino | 65 hr |
| Dec 21, 4:18 AM PST | Winter Weather Advisory | SGX | Riverside, San Bernardino | 14 hr |
| Dec 21, 6:38 AM PST | River Flood Warning | SGX | San Diego | 3 hr |
| Dec 21, 6:38 AM PST | River Flood Warning | SGX | San Diego | 15 hr |
| Dec 21, 8:05 AM PST | Areal Flood Advisory | SGX | Orange, Riverside, San Bernardino, San Diego | 12 hr |
| Dec 21, 12:47 PM PST | River Flood Warning | SGX | San Diego | 46 hr |
| Dec 21, 12:56 PM PST | Wind Advisory | SGX | Orange, Riverside, San Bernardino, San Diego | 24 hr |
| Dec 21, 1:46 PM PST | Small Craft Advisory | SGX | 28 hr |
Nearby
Winter Storm Warnings in California, 2010Every winter storm warning in 2010
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.