Alert archive / California / Special Weather Statements in 2016
Special Weather Statement, NWS Sacramento, CA
NWS Sacramento, CA issued this special weather statement at Oct 2, 2016, 1:17 PM PDT for Sutter County, California. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Oct 2, 2016, 1:17 PM PDT (20:17 UTC)
- Expired
- Oct 2, 2016, 2:15 PM PDT
- In force
- 58 min
- Issued by
- NWS Sacramento, CA
County Sutter County, CA
The radar
The Sacramento radar (KDAX), 43 km from the middle of the area, began a volume at 20:20 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, 8.3 hours before the alert went out and 138 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
- 937 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -49 m²/s²
- 0-3 km storm-relative helicity
- -25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sacramento, CA wrote its last area forecast discussion before this special weather statement went out at Oct 2, 8:42 AM PDT, 4 hours 35 minutes earlier.
Area forecast discussion, Oct 2, 8:42 AM PDT, 4 hours 35 minutes before
Area Forecast Discussion National Weather Service Sacramento CA 842 AM PDT SUN OCT 2 2016 .SYNOPSIS... A weather system with unseasonably cool temperatures, and periods of Valley rain, mountain snow, and possible thunderstorms continues into early Tuesday. Drier weather expected by the middle of this week. && .DISCUSSION... Clear skies continue over much of the area, but this will change quickly as a narrow frontal band located behind a line from around Red Bluff to Clear Lake pushes to the southeast. Some rain has been falling from this band, with around a half inch along the coast to around 0.05-0.10" over the eastern side of the Coastal Range in western Shasta and Tehama counties so far this morning. This will gradually spread through much of the area, though high resolution models suggest that it will weaken as it moves to the southeast. Much of the precipitation will be north of I80, especially with the initial frontal band. A concern this afternoon is for thunderstorms to develop in the clearing skies behind the front, with a brief lull in the precipitation. Solar heating timed with the cold core aloft could be enough to generate some thunderstorms over the Valley and into the foothills. The best potential looks north of I80, though some models hint that an isolated thunderstorm could reach as far south as Stockton/Modesto. While modeled shear in the lowest levels is fairly marginal, there is ample shear higher up. Will be watching closely to see if conditions to develop for severe weather, though expect it would be rather isolated. A Winter Weather Advisory takes effect after 11 am, due to the potential for some early season snow. This could begin in the late morning for the Lassen Park/western Plumas County area, then arriving in the Sierra in the early afternoon. EK && .EXTENDED DISCUSSION (Thursday THROUGH Sunday) Dry through the extended period under upper level high pressure. Temperatures will be warming through the extended period reaching just a little below normal by Sunday. Breezy northerly winds will be decreasing on Thursday as pressure gradients relax. A weather system passing to the north early Saturday will turn winds to more westerly but otherwise have little impact on CWA weather with any precipitation remaining north of the forecast area. && .AVIATION... VFR conditions early this morning. A weak frontal band dropping through Norcal will bring scattered light showers starting northern Sacramento valley and shifting southward. Possible MVFR at times developing shortly over the northern Sacramento valley...after 19z southern Sacramento valley and after 20z northern San Joaquin county. Isolated thunderstorms also possible. Improving conditions tonight. Breezy west winds with gusts to 30 mph through the delta and over the Sierra crest. && .STO Watches/Warnings/Advisories... Winter Weather Advisory until 5 AM PDT Monday for West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park. &&
In the hours before
Special weather statement, Oct 2, 1:17 PM PDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SACRAMENTO CA 117 PM PDT SUN OCT 2 2016 CAZ016-017-022115- CENTRAL SACRAMENTO VALLEY CA-SOUTHERN SACRAMENTO VALLEY CA- 117 PM PDT SUN OCT 2 2016 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN YUBA...SOUTHEASTERN SUTTER AND NORTHEASTERN YOLO COUNTIES UNTIL 215 PM PDT... AT 115 PM PDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER ROBBINS...OR 14 MILES NORTH OF WOODLAND...MOVING EAST AT 15 MPH. DIME SIZE HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... PLEASANT GROVE...NICOLAUS AND ROBBINS. PRECAUTIONARY/PREPAREDNESS ACTIONS... TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && LAT...LON 3886 12174 3895 12175 3904 12146 3874 12149 TIME...MOT...LOC 2015Z 266DEG 12KT 3888 12173 EK
The office that day
Everything else NWS Sacramento, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 2, 1:50 PM PDT | Special Weather Statement | STO | Tehama | 55 min |
| Oct 2, 2:41 PM PDT | Severe Thunderstorm Warning | STO | Shasta, Tehama | 64 min |
| Oct 2, 2:52 PM PDT | Special Weather Statement | STO | Sacramento | 38 min |
| Oct 2, 2:59 PM PDT | Severe Thunderstorm Warning | STO | El Dorado, Placer, Sacramento | 46 min |
| Oct 2, 3:33 PM PDT | Special Weather Statement | STO | Tehama | 42 min |
| Oct 2, 4:16 PM PDT | Special Weather Statement | STO | Butte | 44 min |
| Oct 2, 4:28 PM PDT | Severe Thunderstorm Warning | STO | Butte, Glenn, Tehama | 47 min |
Nearby
Special Weather Statements in California, 2016Every special weather statement in 2016
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.