Alert archive / California / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 13, NWS Sacramento, CA

October 2, 2016Butte County, Glenn County, Tehama County, California

NWS Sacramento, CA issued this severe thunderstorm warning at Oct 2, 2016, 4:28 PM PDT for Butte County, Glenn County, Tehama County, California. It was in force for 47 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Oct 2, 2016, 4:28 PM PDT (23:28 UTC)
Expired
Oct 2, 2016, 5:15 PM PDT
In force
47 min
Issued by
NWS Sacramento, CA
Area
Storm-based polygon

Counties Butte County, CA, Glenn County, CA, Tehama County, CA

The radar

The Beale AFB radar (KBBX), 35 km from the middle of the area, began a volume at 23:32 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.

What was reported inside it

TimeReportWhereRemark
Oct 2, 4:48 PM PDTHAIL 1Chico, CA
Oct 2, 4:48 PM PDTHAIL 1Chico, CA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Oakland, CA (KOAK), launched 12:00Z, 11.5 hours before the alert went out and 228 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.

Skew-T log-pSkew-T log-p diagram, Oakland, CA at 12:00Z on 2016-10-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Oakland, CA at 12:00Z on 2016-10-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -49 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

The text

As transmitted.

998 
WUUS56 KSTO 022328
SVRSTO
CAC007-021-103-030015-
/O.NEW.KSTO.SV.W.0013.161002T2328Z-161003T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SACRAMENTO CA
428 PM PDT SUN OCT 2 2016

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN GLENN COUNTY IN CENTRAL CALIFORNIA...
  SOUTH CENTRAL TEHAMA COUNTY IN NORTHERN CALIFORNIA...
  WEST CENTRAL BUTTE COUNTY IN NORTHERN CALIFORNIA...

* UNTIL 515 PM PDT

* AT 425 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND GUSTY OUTFLOW WINDS.
  THIS STORM WAS LOCATED NEAR NORD...AND MOVING EAST AT 30 MPH
  TOWARDS CHICO.

* LOCATIONS IMPACTED INCLUDE...
  CHICO...PARADISE...DE SABLA POWERHOUSE...FOREST RANCH...RICHARDSON
  SPRINGS...NORD...MAGALIA...DURHAM AND HAMILTON CITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE
HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR
PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE
TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

&&

LAT...LON 3972 12203 3991 12204 3991 12163 3956 12153
TIME...MOT...LOC 2325Z 285DEG 33KT 3982 12191 

$$
JHM
2 follow-up statements
706 
WWUS56 KSTO 022346
SVSSTO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CA
446 PM PDT SUN OCT 2 2016

CAC007-021-103-030015-
/O.CON.KSTO.SV.W.0013.000000T0000Z-161003T0015Z/
GLENN CA-TEHAMA CA-BUTTE CA-
446 PM PDT SUN OCT 2 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM PDT
FOR NORTHEASTERN GLENN...SOUTH CENTRAL TEHAMA AND WEST CENTRAL BUTTE
COUNTIES...

AT 440 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING QUARTER SIZE OR LARGER HAIL. THIS STORM WAS
LOCATED NEAR CHICO... MOVING EAST-SOUTHEAST AT 20 MPH. RESIDENTS
SHOULD PREPARE FOR LARGE HAIL AND HEAVY DOWNPOURS. 

LOCATIONS POSSIBLY IMPACTED INCLUDE... 
CHICO...PARADISE...DE SABLA POWERHOUSE...FOREST RANCH...RICHARDSON
SPRINGS...NORD...MAGALIA...DURHAM AND HAMILTON CITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE
HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION
MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR
BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS
WHERE WATER COVERS THE ROAD.

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE
TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

&&

LAT...LON 3972 12203 3991 12204 3991 12163 3956 12153
TIME...MOT...LOC 2340Z 285DEG 33KT 3978 12174 

$$

JHM
693 
WWUS56 KSTO 030018
SVSSTO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CA
518 PM PDT SUN OCT 2 2016

CAC007-021-103-030027-
/O.EXP.KSTO.SV.W.0013.000000T0000Z-161003T0015Z/
GLENN CA-TEHAMA CA-BUTTE CA-
518 PM PDT SUN OCT 2 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GLENN...SOUTH
CENTRAL TEHAMA AND WEST CENTRAL BUTTE COUNTIES HAS EXPIRED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE. HOWEVER SMALL HAIL
AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM AS IT MOVES 
EAST-SOUTHEAST TOWARDS BUTTE...BIG BEND AND OROVILLE DAM.  

LAT...LON 3972 12203 3991 12204 3991 12163 3956 12153
TIME...MOT...LOC 0012Z 285DEG 33KT 3978 12174 

$$
JHM

The office that day

Everything else NWS Sacramento, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 2, 1:17 PM PDTSpecial Weather StatementSTOSutter58 min
Oct 2, 1:50 PM PDTSpecial Weather StatementSTOTehama55 min
Oct 2, 2:41 PM PDTSevere Thunderstorm WarningSTOShasta, Tehama64 min
Oct 2, 2:52 PM PDTSpecial Weather StatementSTOSacramento38 min
Oct 2, 2:59 PM PDTSevere Thunderstorm WarningSTOEl Dorado, Placer, Sacramento46 min
Oct 2, 3:33 PM PDTSpecial Weather StatementSTOTehama42 min
Oct 2, 4:16 PM PDTSpecial Weather StatementSTOButte44 min

Nearby

Severe Thunderstorm Warnings in California, 2016Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.