Alert archive / California / Mesoscale Discussions in 2005
Mesoscale Discussion 2604
The Storm Prediction Center issued this mesoscale discussion at Dec 31, 2005, 9:55 AM PST for 14 counties in California. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 31, 2005, 9:55 AM PST (17:55 UTC)
- Expired
- Dec 31, 2005, 12:00 PM PST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
Counties Amador County, CA, Butte County, CA, Calaveras County, CA, Colusa County, CA, El Dorado County, CA, Glenn County, CA, Placer County, CA, Sacramento County, CA, San Joaquin County, CA, Shasta County, CA, Sutter County, CA, Tehama County, CA, Yolo County, CA, Yuba County, CA
The radar
The Beale AFB radar (KBBX), 55 km from the middle of the area, began a volume at 17:57 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
Oakland, CA (KOAK), launched 12:00Z, 5.9 hours before the alert went out and 156 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
- 602 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 324 m²/s²
- 0-3 km storm-relative helicity
- 499 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 31, 10:32 AM PST | Mesoscale Discussion | SPC | Alpine, El Dorado, Nevada, Placer, Tuolumne | 5 hr |
Nearby
Mesoscale Discussions in California, 2005Every mesoscale discussion in 2005
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.