Alert archive / California / Tornado Warnings in 2002

Tornado Warning 7, NWS Sacramento, CA

May 20, 2002Sutter County, Yuba County, California

NWS Sacramento, CA issued this tornado warning at May 20, 2002, 1:27 PM PDT for Sutter County, Yuba County, California. It was in force for 48 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: May 20, 2002, 1:27 PM PDT (20:27 UTC)
Expired: May 20, 2002, 2:15 PM PDT
In force: 48 min
Issued by: NWS Sacramento, CA
Area: Counties, with a storm outline in the text

Counties Sutter County, CA, Yuba County, CA

The nearest sounding before it

Oakland, CA (KOAK), launched 12:00Z, 8.5 hours before the alert went out and 158 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 4 J/kg
Mixed-layer CIN: -206 J/kg
Mixed-layer LCL: 592 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -46 m²/s²
0-3 km storm-relative helicity: -31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS56 KSTO 202027
TORSAC
CAC101-115-202115-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SACRAMENTO CA
126 PM PDT MON MAY 20 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL SUTTER COUNTY IN CALIFORNIA
  SOUTHWESTERN YUBA COUNTY IN CALIFORNIA

* VALID UNTIL 215 PM PDT

* AT 118 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 6 MILES SOUTH OF SOUTH YUBA CITY...OR ABOUT 8 MILES SOUTH
  OF YUBA CITY...MOVING NORTH AT 15 MPH.

* SOME LOCATIONS AFFECTED BY THIS WARNING INCLUDE...
  LINDA
  MARYSVILLE
  OLIVEHURST
  SOUTH YUBA CITY
  TIERRA BUENA
  YUBA CITY

*THE TORNADO WILL BE NEAR...
  SOUTH YUBA CITY AT 140 PM PDT
  YUBA CITY AT 145 PM PDT
  MARYSVILLE AT 150 PM PDT

REPORT SIGNIFICANT WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE.

LAT...LON 3900 12172 3896 12157 3918 12144 3925 12169

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 11:44 AM PDT	Tornado Warning	STO	Sutter, Yolo	31 min
May 20, 12:00 PM PDT	Severe Thunderstorm Warning	STO	Glenn, Tehama	30 min
May 20, 12:14 PM PDT	Severe Thunderstorm Warning	STO	Sacramento, Yolo	31 min
May 20, 12:19 PM PDT	Tornado Warning	STO	Sutter, Yolo	26 min
May 20, 12:48 PM PDT	Severe Thunderstorm Warning	STO	Sacramento	27 min
May 20, 1:26 PM PDT	Tornado Warning	STO	Amador, Sacramento, San Joaquin	34 min
May 20, 2:03 PM PDT	Severe Thunderstorm Warning	STO	Sacramento, San Joaquin	42 min
May 20, 2:09 PM PDT	Severe Thunderstorm Warning	STO	Amador	36 min
May 20, 2:31 PM PDT	Severe Thunderstorm Warning	STO	Calaveras	29 min
May 20, 2:32 PM PDT	Tornado Warning	STO	Sacramento, Sutter, Yolo	28 min
May 20, 3:00 PM PDT	Severe Thunderstorm Warning	STO	Amador, Calaveras	45 min
May 20, 3:10 PM PDT	Severe Thunderstorm Warning	STO	Placer, Sutter	35 min

Nearby

Tornado Warnings in California, 2002 Every tornado warning in 2002 Tornadoes in 2002

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.