Alert archive / California / Heavy Snow Warnings in 2007
Heavy Snow Warning 1, NWS Reno, NV
NWS Reno, NV issued this heavy snow warning at Sep 21, 2007, 2:30 PM PDT for Mono County, California. It took effect at Sep 21, 2007, 10:00 PM PDT. It was in force for 9 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
- Sep 21, 2007, 2:30 PM PDT (21:30 UTC)
- In effect from
- Sep 21, 2007, 10:00 PM PDT
- Expired
- Sep 22, 2007, 7:15 AM PDT
- In force
- 9 hr
- Issued by
- NWS Reno, NV
County Mono County, CA
The radar
The San Joaquin Valley radar (KHNX), 192 km from the middle of the area, began a volume at 21:34 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
Mercury/Desert R, NV (KDRA), launched 12:00Z, 9.5 hours before the alert went out and 295 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
- 1931 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- -107 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this heavy snow warning 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 heavy snow warning went out at Sep 21, 3:35 AM PDT, 10 hours 55 minutes earlier.
Area forecast discussion, Sep 21, 3:35 AM PDT, 10 hours 55 minutes before
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</html>The office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 3:15 AM PDT | Lake Wind Advisory | REV | Douglas, Washoe | 15 hr |
Nearby
Heavy Snow Warnings in California, 2007Every heavy snow warning in 2007
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.