Alert archive / California / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 3, NWS Eureka, CA

May 5, 2016Humboldt County, California

NWS Eureka, CA issued this severe thunderstorm warning at May 5, 2016, 2:39 PM PDT for Humboldt County, California. It was in force for 36 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 5, 2016, 2:39 PM PDT (21:39 UTC)
Expired
May 5, 2016, 3:15 PM PDT
In force
36 min
Issued by
NWS Eureka, CA
Area
Storm-based polygon

County Humboldt County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 66 km from the middle of the area, began a volume at 21:41 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

Medford/Jackson, OR (KMFR), launched 12:00Z, 9.7 hours before the alert went out and 188 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-pSkew-T log-p diagram, Medford/Jackson, OR at 12:00Z on 2016-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Medford/Jackson, OR at 12:00Z on 2016-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
6 J/kg
Mixed-layer CIN
-196 J/kg
Mixed-layer LCL
546 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
50 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

730 
WUUS56 KEKA 052139
SVREKA
CAC023-052215-
/O.NEW.KEKA.SV.W.0003.160505T2139Z-160505T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EUREKA
239 PM PDT THU MAY 5 2016

THE NATIONAL WEATHER SERVICE IN EUREKA CALIFORNIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL HUMBOLDT COUNTY IN NORTHWESTERN CALIFORNIA...

* UNTIL 315 PM PDT

* AT 238 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND WIND GUSTS TO 40 MPH.
  THIS STORM WAS LOCATED 8 MILES SOUTH OF SALYER...OR 10 MILES SOUTH
  OF WILLOW CREEK. THIS STORM WAS NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  MOUNTAINOUS AREAS SOUTHWEST OF SALYER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...


IN ADDITION TO LARGE HAIL AND WINDS...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 4086 12359 4073 12355 4068 12364 4084 12373
TIME...MOT...LOC 2138Z 060DEG 3KT 4079 12363 

$$

RPA
2 follow-up statements
597 
WWUS56 KEKA 052157
SVSEKA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA
257 PM PDT THU MAY 5 2016

CAC023-052215-
/O.CON.KEKA.SV.W.0003.000000T0000Z-160505T2215Z/
HUMBOLDT CA-
257 PM PDT THU MAY 5 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM PDT
FOR EAST CENTRAL HUMBOLDT COUNTY...

AT 256 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING QUARTER SIZE HAIL AND WIND GUSTS TO 40 MPH.
THIS STORM WAS LOCATED 9 MILES SOUTHWEST OF SALYER...OR 10 MILES
SOUTH OF WILLOW CREEK. THIS STORM WAS NEARLY STATIONARY.

LOCATIONS IMPACTED INCLUDE...
MOUNTAINOUS AREAS SOUTHWEST OF SALYER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...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.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4086 12359 4073 12355 4068 12364 4084 12373
TIME...MOT...LOC 2156Z 060DEG 3KT 4078 12365 

$$

RPA
454 
WWUS56 KEKA 052213
SVSEKA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA
313 PM PDT THU MAY 5 2016

CAC023-052223-
/O.EXP.KEKA.SV.W.0003.000000T0000Z-160505T2215Z/
HUMBOLDT CA-
313 PM PDT THU MAY 5 2016

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL HUMBOLDT COUNTY
WILL EXPIRE AT 315 PM PDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER HEAVY RAIN
IS STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4086 12359 4073 12355 4068 12364 4084 12373
TIME...MOT...LOC 2212Z 060DEG 3KT 4078 12365 

$$

RPA

The office that day

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

IssuedProductOfficeCountiesLasted
May 4, 5:31 PM PDTSpecial Weather StatementEKATrinity29 min
May 5, 1:16 PM PDTSpecial Weather StatementEKATrinity44 min
May 5, 1:39 PM PDTSpecial Weather StatementEKATrinity36 min
May 5, 1:56 PM PDTSevere Thunderstorm WarningEKATrinity34 min
May 5, 2:06 PM PDTSpecial Weather StatementEKATrinity39 min
May 5, 2:22 PM PDTSpecial Weather StatementEKATrinity38 min
May 5, 2:32 PM PDTSpecial Weather StatementEKAHumboldt43 min
May 5, 3:28 PM PDTSpecial Weather StatementEKAHumboldt32 min

Nearby

Severe Thunderstorm Warnings in California, 2016Every severe thunderstorm warning in 2016

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.