Alert archive / California / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 1, NWS Eureka, CA

February 7, 2000Humboldt County, California

NWS Eureka, CA issued this severe thunderstorm warning at Feb 7, 2000, 10:17 AM PST for Humboldt County, California. It was in force for 18 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Feb 7, 2000, 10:17 AM PST (18:17 UTC)
Expired
Feb 7, 2000, 10:35 AM PST
In force
18 min
Issued by
NWS Eureka, CA
Area
Whole counties

County Humboldt County, CA

The nearest sounding before it

Medford/Jackson, OR (KMFR), launched 12:00Z, 6.3 hours before the alert went out and 207 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 2000-02-07Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Medford/Jackson, OR at 12:00Z on 2000-02-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 270 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1591 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
270 m²/s²
0-3 km storm-relative helicity
344 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.

000 
TTAA00 KEKA 071819
SVREKA
CAC023-071822-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EUREKA CA
1017 AM PST MON FEB 7 2000

THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  THIS IS A COMMUNICATIONS TEST - NO SEVERE WEATHER IS
  OCCURRING IN THE AREA.

* UNTIL 1035 AM PST

* AT - NO SEVERE WEATHER IS OCCURRING.  TEST ONLY.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  NONE

T`EST

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 7, 11:13 AM PSTSevere Thunderstorm WarningEKADel Norte17 min

Nearby

Severe Thunderstorm Warnings in California, 2000Every severe thunderstorm warning in 2000

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.