Alert archive / California / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 7, NWS Reno, NV

July 12, 2002Lassen County, California; Washoe County, Nevada

NWS Reno, NV issued this severe thunderstorm warning at Jul 12, 2002, 4:28 PM PDT for Lassen County, California; Washoe County, Nevada. It was in force for 32 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: Jul 12, 2002, 4:28 PM PDT (23:28 UTC)
Expired: Jul 12, 2002, 5:00 PM PDT
In force: 32 min
Issued by: NWS Reno, NV
Area: Counties, with a storm outline in the text

Counties Lassen County, CA, Washoe County, NV

The radar

The Reno radar (KRGX), 56 km from the middle of the area, began a volume at 23:30 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

Reno, NV (KREV), launched 12:00Z, 11.5 hours before the alert went out and 161 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: 109 J/kg
Mixed-layer CIN: -329 J/kg
Mixed-layer LCL: 3076 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: 26 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.

143 
WUUS55 KREV 122328
SVRREV
CAC035-NVC031-130000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE RENO NV
426 PM PDT FRI JUL 12 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN LASSEN COUNTY IN NORTHERN CALIFORNIA
  WEST CENTRAL WASHOE COUNTY IN WESTERN NEVADA

* UNTIL 500 PM PDT

* AT 425 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER WEST CENTRAL WASHOE COUNTY...OR ABOUT 9
  MILES EAST OF DOYLE...MOVING NORTH AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL MOVE EAST OF DOYLE THROUGH HERLONG    
  JUST EAST OF HIGHWAY 395.

DIME SIZE HAIL AND BRIEF HEAVY RAIN WILL ACCOMPANY THIS STORM ALONG 
WITH DANGEROUS LIGHTNING.

IF YOU ARE IN THE PATH OF THE STORM...MOVE TO A SUBSTANTIAL SHELTER.

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

LAT...LON 3996 12003 3997 11980 4030 11981 4027 12010

The office that day

Everything else NWS Reno, NV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 12, 2:47 PM PDT	Severe Thunderstorm Warning	REV	Nevada, Sierra	28 min
Jul 12, 3:24 PM PDT	Severe Thunderstorm Warning	REV	Lassen, Plumas, Sierra	21 min
Jul 12, 3:48 PM PDT	Severe Thunderstorm Warning	REV	Washoe	27 min

Nearby

Severe Thunderstorm Warnings in California, 2002 Severe Thunderstorm Warnings in Nevada, 2002 Every severe thunderstorm warning 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; radar from the NEXRAD Level II archive.