Alert archive / California / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 13, NWS Reno, NV

July 18, 2014Lassen County, Plumas County, California

NWS Reno, NV issued this severe thunderstorm warning at Jul 18, 2014, 5:59 PM PDT for Lassen County, Plumas County, California. It was in force for 61 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 18, 2014, 5:59 PM PDT (00:59 UTC)
Expired: Jul 18, 2014, 7:00 PM PDT
In force: 61 min
Issued by: NWS Reno, NV
Area: Storm-based polygon

Counties Lassen County, CA, Plumas County, CA

The radar

The Beale AFB radar (KBBX), 107 km from the middle of the area, began a volume at 01:00 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 00:00Z, 1.0 hours before the alert went out and 242 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: 19 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 3524 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 22 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.

608 
WUUS55 KREV 190059
SVRREV
CAC035-063-190200-
/O.NEW.KREV.SV.W.0013.140719T0059Z-140719T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE RENO NV
559 PM PDT FRI JUL 18 2014

THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL LASSEN COUNTY IN NORTHERN CALIFORNIA...
  CENTRAL PLUMAS COUNTY IN NORTHERN CALIFORNIA...

* UNTIL 700 PM PDT

* AT 556 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 12
  MILES SOUTHEAST OF FREDONYER PASS...OR 22 MILES NORTHEAST OF
  QUINCY...AND MOVING NORTHWEST AT 10 MPH.

* LOCATIONS AFFECTED INCLUDE...FREDONYER PASS...WESTWOOD AND JUNCTION
  CA 36 AND CA 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM IS CAPABLE OF PRODUCING HEAVY RAINFALL. WATCH FOR PONDING
OF WATER ON ROADS. DRIVERS SHOULD SLOW DOWN IF ENCOUNTERING HEAVY
RAIN TO AVOID HYDROPLANING...AND REMEMBER TO TURN ON THEIR
HEADLIGHTS.

LAT...LON 4053 12103 4039 12062 4003 12069 4007 12083
      4018 12088 4022 12100 4024 12103
TIME...MOT...LOC 0059Z 150DEG 11KT 4022 12074

$$

WEISHAHN

1 follow-up statement

074 
WWUS55 KREV 190131
SVSREV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RENO NV
631 PM PDT FRI JUL 18 2014

CAC035-063-190200-
/O.CON.KREV.SV.W.0013.000000T0000Z-140719T0200Z/
PLUMAS CA-LASSEN CA-
631 PM PDT FRI JUL 18 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM PDT
FOR SOUTH CENTRAL LASSEN AND CENTRAL PLUMAS COUNTIES...

AT 626 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED 6 MILES SOUTHEAST OF FREDONYER 
PASS...OR 23 MILES EAST OF CHESTER...AND WAS NEARLY STATIONARY.

* LOCATIONS AFFECTED INCLUDE...FREDONYER PASS...WESTWOOD AND JUNCTION
  CA 36 AND CA 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE
INDOORS OR INSIDE A VEHICLE IMMEDIATELY! IF YOU CAN HEAR THUNDER...
YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. STAY OFF LANDLINE
TELEPHONES AND UNPLUG ANY SENSITIVE ELECTRONICS.

THIS STORM IS CAPABLE OF PRODUCING HEAVY RAINFALL. WATCH FOR PONDING 
OF WATER ON ROADS AND POTENTIAL ROCK SLIDES IN STEEP TERRAIN. DRIVERS 
SHOULD SLOW DOWN WHEN ENCOUNTERING HEAVY RAIN TO AVOID 
HYDROPLANING...AND REMEMBER TO TURN ON THEIR HEADLIGHTS.

&&

LAT...LON 4053 12103 4039 12062 4003 12069 4007 12083
      4018 12088 4022 12100 4024 12103
TIME...MOT...LOC 0130Z 150DEG 11KT 4030 12080

$$

HOON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 7:10 PM PDT	Areal Flood Advisory	REV	Lassen, Plumas	3 hr
Jul 19, 2:14 PM PDT	Special Weather Statement	REV	Sierra	46 min
Jul 19, 2:45 PM PDT	Severe Thunderstorm Warning	REV	Plumas, Sierra	45 min
Jul 19, 2:56 PM PDT	Special Weather Statement	REV	Sierra	34 min
Jul 19, 2:59 PM PDT	Special Weather Statement	REV	Plumas	61 min
Jul 19, 3:06 PM PDT	Severe Thunderstorm Warning	REV	Plumas	39 min
Jul 19, 3:49 PM PDT	Flash Flood Warning	REV	Nevada, Sierra	3 hr
Jul 19, 4:13 PM PDT	Special Weather Statement	REV	Alpine	62 min
Jul 19, 4:31 PM PDT	Special Weather Statement	REV	Sierra	59 min
Jul 19, 4:39 PM PDT	Special Weather Statement	REV	Plumas	96 min

Nearby

Severe Thunderstorm Warnings in California, 2014 Every severe thunderstorm warning in 2014

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.