Alert archive / California / Special Weather Statements in 2014

Special Weather Statement, NWS Eureka, CA

August 4, 2014Siskiyou County, California

NWS Eureka, CA issued this special weather statement at Aug 4, 2014, 9:02 PM PDT for Siskiyou County, California. It was in force for 43 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
Aug 4, 2014, 9:02 PM PDT (04:02 UTC)
Expired
Aug 4, 2014, 9:45 PM PDT
In force
43 min
Issued by
NWS Eureka, CA

County Siskiyou County, CA

The radar

The Medford radar (KMAX), 97 km from the middle of the area, began a volume at 04:03 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 00:00Z, 4.0 hours before the alert went out and 130 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 00:00Z on 2014-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 907 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Medford/Jackson, OR at 00:00Z on 2014-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 square meters per square second.1939Sfc1 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
907 J/kg
Mixed-layer CIN
-148 J/kg
Mixed-layer LCL
2195 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
-24 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.

346 
WWUS86 KEKA 050402
SPSEKA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
902 PM PDT MON AUG 4 2014

CAZ004-050445-
TRINITY CA-
902 PM PDT MON AUG 4 2014

THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  EXTREME NORTHEASTERN TRINITY COUNTY IN NORTHWEST CALIFORNIA

UNTIL 945 PM PDT

AT 900 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 12 MILES SOUTHWEST OF WEED...MOVING SOUTH AT 10
MPH.

DIME SIZE HAIL IS EXPECTED WITH THIS STORM....ALONG WITH FREQUENT
DANGEROUS LIGHTNING.

LOCATIONS IMPACTED INCLUDE...
  RURAL NORTHEASTERN TRINITY COUNTY...

LAT...LON 4109 12246 4107 12253 4106 12251 4103 12253
      4109 12280 4129 12270 4130 12266 4134 12264
      4133 12260 4137 12257 4135 12253 4135 12251
      4131 12248 4121 12251 4117 12245
TIME...MOT...LOC 0401Z 015DEG 10KT 4129 12255

$$

ST/KL

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 3:06 AM PDTRed Flag WarningEKA17 hr

Nearby

Special Weather Statements in California, 2014Every special weather statement 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.