Alert archive / California / Winter Weather Advisories in 2021
Winter Weather Advisory 18, NWS Reno, NV
NWS Reno, NV issued this winter weather advisory at Nov 6, 2021, 2:11 AM PDT for Douglas County, Washoe County, Nevada; 4 counties in California. It took effect at Nov 6, 2021, 11:00 AM PDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Nov 6, 2021, 2:11 AM PDT (09:11 UTC)
- In effect from
- Nov 6, 2021, 11:00 AM PDT
- Expired
- Nov 6, 2021, 5:47 PM PDT
- In force
- 7 hr
- Issued by
- NWS Reno, NV
Counties Alpine County, CA, El Dorado County, CA, Nevada County, CA, Placer County, CA, Douglas County, NV, Washoe County, NV
The radar
The Reno radar (KRGX), 86 km from the middle of the area, began a volume at 09:14 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 00:00Z, 9.2 hours before the alert went out and 241 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
- 1056 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 151 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 weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Reno, NV wrote its last area forecast discussion before this winter weather advisory went out at Nov 5, 3:46 PM PDT, 10 hours 25 minutes earlier.
Area forecast discussion, Nov 5, 3:46 PM PDT, 10 hours 25 minutes before
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Winter Weather Advisories in California, 2021Winter Weather Advisories in Nevada, 2021Every winter weather advisory in 2021
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.