Alert archive / California / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 4, NWS Reno, NV

June 23, 2021Lassen County, Plumas County, California

NWS Reno, NV issued this severe thunderstorm warning at Jun 23, 2021, 4:27 PM PDT for Lassen County, Plumas County, California. It was in force for 33 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: Jun 23, 2021, 4:27 PM PDT (23:27 UTC)
Expired: Jun 23, 2021, 5:00 PM PDT
In force: 33 min
Issued by: NWS Reno, NV
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Lassen County, CA, Plumas County, CA

The radar

The Reno radar (KRGX), 91 km from the middle of the area, began a volume at 23:28 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 199 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2512 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

065 
WUUS55 KREV 232327
SVRREV
CAC035-063-240000-
/O.NEW.KREV.SV.W.0004.210623T2327Z-210624T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Reno NV
427 PM PDT Wed Jun 23 2021

The National Weather Service in Reno has issued a

* Severe Thunderstorm Warning for...
  Plumas County in northern California...
  Central Lassen County in northern California...

* Until 500 PM PDT.

* At 426 PM PDT, a severe thunderstorm was located near Lake Davis,
  or 14 miles northwest of Beckwourth, moving northwest at 30 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, fencing and trees.

* Locations impacted include...
  Beckwourth, Susanville, Janesville, Lake Davis, Antelope Lake,
  Grizzly Campground, Standish, Susanville Municipal Airport, Boulder
  Creek Campground, Junction CA 36 And CA 44, Lone Rock Campground,
  Lightning Tree Campground, Long Point Campground, Grasshopper Flat
  Campground and Honey Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 3984 12021 3982 12047 4050 12086 4054 12038
TIME...MOT...LOC 2326Z 152DEG 27KT 4000 12050 

HAIL...1.00IN
WIND...60MPH
 
$$

EW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 1:02 PM PDT	Excessive Heat Watch	REV	Lassen, Modoc, Plumas, Sierra	62 hr
Jun 23, 4:03 PM PDT	Severe Thunderstorm Warning	REV	Lassen	42 min

Nearby

Severe Thunderstorm Warnings in California, 2021 Every severe thunderstorm warning in 2021

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.