Alert archive / California / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 5, NWS Reno, NV

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

NWS Reno, NV issued this severe thunderstorm warning at Jul 12, 2002, 3:24 PM PDT for Washoe County, Nevada; Lassen County, Plumas County, Sierra County, California. It was in force for 21 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, 3:24 PM PDT (22:24 UTC)
Expired: Jul 12, 2002, 3:45 PM PDT
In force: 21 min
Issued by: NWS Reno, NV
Area: Counties, with a storm outline in the text

Counties Lassen County, CA, Plumas County, CA, Sierra County, CA, Washoe County, NV

The radar

The Reno radar (KRGX), 47 km from the middle of the area, began a volume at 22:27 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, 10.4 hours before the alert went out and 155 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.

985 
WUUS55 KREV 122224
SVRREV
CAC035-063-091-NVC031-122245-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME SOUTHEASTERN LASSEN COUNTY IN NORTHERN CALIFORNIA
  EXTREME SOUTHEASTERN PLUMAS COUNTY IN NORTHERN CALIFORNIA
  NORTHEASTERN SIERRA COUNTY IN NORTHERN CALIFORNIA
  SOUTHWESTERN WASHOE COUNTY IN WESTERN NEVADA

* UNTIL 345 PM PDT

* AT 322 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES WEST OF STEAD...OR ABOUT 9 MILES NORTH
  OF VERDI...MOVING NORTH AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HALLELUJAH JUNCTION AT 345 PM PDT

HAIL...INTENSE RAIN AND STRONG DAMAGING WINDS ARE LIKELY WITH THIS
STORM. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES.

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

LAT...LON 3955 12008 3958 11985 3991 11987 3988 12016

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 3:48 PM PDT	Severe Thunderstorm Warning	REV	Washoe	27 min
Jul 12, 4:28 PM PDT	Severe Thunderstorm Warning	REV	Washoe	32 min
Jul 12, 2:47 PM PDT	Severe Thunderstorm Warning	REV	Nevada, Sierra	28 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.