Alert archive / California / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 1, NWS Eureka, CA

January 19, 2016Del Norte County, California

NWS Eureka, CA issued this severe thunderstorm warning at Jan 19, 2016, 9:33 AM PST for Del Norte County, California. It was in force for 42 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
Jan 19, 2016, 9:33 AM PST (17:33 UTC)
Expired
Jan 19, 2016, 10:15 AM PST
In force
42 min
Issued by
NWS Eureka, CA
Area
Storm-based polygon

County Del Norte County, CA

The radar

The Medford radar (KMAX), 119 km from the middle of the area, began a volume at 17:35 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, 5.6 hours before the alert went out and 124 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 2016-01-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2016-01-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1114 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
312 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

420 
WUUS56 KEKA 191733
SVREKA
CAC015-191815-
/O.NEW.KEKA.SV.W.0001.160119T1733Z-160119T1815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EUREKA
933 AM PST TUE JAN 19 2016

THE NATIONAL WEATHER SERVICE IN EUREKA CALIFORNIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN DEL NORTE COUNTY IN NORTHWESTERN CALIFORNIA...

* UNTIL 1015 AM PST

* AT 931 AM PST...DOPPLER RADAR INDICATED A LINE OF HEAVY SHOWERS
  AND EMBEDDED THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM NEAR HARBOR TO 27 MILES SOUTHWEST OF CRESCENT CITY...AND
  MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CRESCENT CITY...JEDEDIAH SMITH STATE PARK...SMITH RIVER...
  OCEANVIEW AND FT DICK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

&&

LAT...LON 4199 12385 4194 12389 4172 12411 4171 12414
      4174 12417 4174 12418 4175 12419 4174 12420
      4178 12426 4184 12422 4193 12420 4194 12420
      4195 12421 4200 12421
TIME...MOT...LOC 1731Z 239DEG 37KT 4197 12424 4160 12471 

$$

CARROLL
1 follow-up statement
461 
WWUS56 KEKA 191814
SVSEKA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA
1014 AM PST TUE JAN 19 2016

CAC015-191823-
/O.EXP.KEKA.SV.W.0001.000000T0000Z-160119T1815Z/
DEL NORTE CA-
1014 AM PST TUE JAN 19 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN DEL NORTE COUNTY
WILL EXPIRE AT 1015 AM PST...
    
THE SHOWERS AND STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED
BELOW SEVERE LIMITS AND EXITED THE WARNED AREA. THEREFORE THE
WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 4199 12385 4194 12389 4172 12411 4171 12414
      4174 12417 4174 12418 4175 12419 4174 12420
      4178 12426 4184 12422 4193 12420 4194 12420
      4195 12421 4200 12421
TIME...MOT...LOC 1812Z 239DEG 37KT 4197 12424 4160 12471 

$$

CARROLL

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 19, 3:42 AM PSTWind AdvisoryEKA9 hr
Jan 19, 7:52 AM PSTCoastal Flood AdvisoryEKA3 hr
Jan 19, 9:01 AM PSTSpecial Marine WarningEKA89 min
Jan 19, 9:05 AM PSTSpecial Weather StatementEKADel Norte55 min
Jan 19, 10:06 AM PSTSpecial Weather StatementEKADel Norte24 min
Jan 19, 10:59 AM PSTSmall Craft AdvisoryEKA61 hr
Jan 19, 2:22 PM PSTGale WatchEKA13 hr

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.