Alert archive / California / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 7, NWS Hanford, CA

April 26, 2001Kern County, Kings County, California

NWS Hanford, CA issued this severe thunderstorm warning at Apr 26, 2001, 5:05 PM PDT for Kern County, Kings County, California. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Apr 26, 2001, 5:05 PM PDT (00:05 UTC)
Expired
Apr 26, 2001, 5:35 PM PDT
In force
30 min
Issued by
NWS Hanford, CA
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Kern County, CA, Kings County, CA

The radar

The San Joaquin Valley radar (KHNX), 67 km from the middle of the area, began a volume at 00:04 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

Vandenberg AFB, CA (KVBG), launched 00:00Z, 0.1 hours before the alert went out and 127 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, Vandenberg AFB, CA at 00:00Z on 2001-04-27Temperature 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, Vandenberg AFB, CA at 00:00Z on 2001-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1776 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
-30 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 
WUUS56 KHNX 270008 CCA
SVRFAT

CAC029-031-270030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED LOCATION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
505 PM PDT THU APR 26 2001

THE NATIONAL WEATHER SERVICE IN HANFORD CA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME NORTHWESTERN KERN COUNTY IN CENTRAL CALIFORNIA
  SOUTHWESTERN KINGS COUNTY IN CENTRAL CALIFORNIA

* UNTIL 535 PM PDT

* AT 458 PM PDT...DOPPLER RADAR SHOWED A SEVERE THUNDERSTORM OVER   
EXTREME SOUTHWESTERN KINGS COUNTY. THE STORM WAS NEARLY STATIONARY.

* THE SEVERE THUNDERSTORM WILL BE...
ALONG HIGHWAY 33 BETWEEN AVENAL AND BLACKWELLS CORNER THROUGH 535 PM 
PDT.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY
MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO
RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN HANFORD CA.

LAT...LON 3580 12014 3565 12001 3580 11986 3596 12001

NESMITH

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Hanford, CA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 26, 2:15 PM PDT, 2 hours 50 minutes earlier.

Area forecast discussion, Apr 26, 2:15 PM PDT, 2 hours 50 minutes before
INTERIOR CENTRAL CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
215 PM PDT THU APR 26 2001

SHORTWAVE TROUGH NEAR 123W WAS MOVING E-NE AROUND 20 KTS THIS
AFTERNOON AND HAS SLOWED A BIT AS IT LIFTS INTO STRONG RIDGE
CENTERED OVER THE INTERMOUNTAIN WEST. EVENING MARINE PUSH INTO THE
SJ VALLEY STILL APPEARS ON TRACK AS UPPER TROUGH HAS SUSTAINED
ONSHORE GRADIENTS WITH SFO-SAC OVER 3 MB...AND MARINE INVERSION
AROUND 1500 FEET. AIRMASS REMAINS UNSTABLE THIS AFTERNOON AND...WITH
GOES INDICATING 500-1000 J/KG CAPE AND CU DEVELOPMENT ONGOING...
WILL INTRO LOW POPS FOR SOUTHERN SIERRA AND KERN MTNS THIS EVE.

DESPITE SOME INITIALIZATION DIFFERENCES OVER THE ERN PAC...MODELS
ARE SIMILAR AND CONSISTENT INDICATING IMPRESSIVE THICKNESS DECREASES
OVER THE CWA DURING THE NEXT 60 HOURS AS SHORTWAVES ROTATING AROUND
GULF OF ALASKA LOW DEEPEN UPPER TROUGH OVER THE WEST COAST STATES.
CWA WILL REMAIN DRY AS MOISTURE AND UPPER DYNAMICS SHIFT ONSHORE
WELL NORTH OF THE CWA. DEEPENING TROUGH...HOWEVER...WILL INCREASE
ONSHORE FLOW THEREBY REINFORCING MARINE INTRUSIONS INTO THE SJ
VALLEY...AND A PROVIDING A POSSIBLE RETURN TO UPSLOPE CLOUDS ALONG
THE EAST SIDE AND SOUTH END. WITH SFO-LAS GRAD ALSO PROGGED TO
APPROACH 12-14MB FRI/SAT...BREEZY TO WINDY CONDITIONS WILL PREVAIL
...ESPECIALLY OVER THE KERN MTNS/DESERTS. WITH ABSENCE OF UPPER
SUPPORT...HOWEVER...WINDS WILL BE DRIVEN SOLELY BY LOW LEVEL GRADS
AND WILL KEEP SPEEDS BELOW WAD THRESHOLDS AT THIS TIME.

MEDIUM RANGE PROGS OFFER SLIGHTLY DIFFERING SOLUTIONS REGARDING
STRENGTH OF ADDITIONAL SHORTWAVE TROUGHS PROGGED TO SHIFT ONSHORE
OVER THE PAC NW EARLY NEXT WEEK...WITH THE MRF INDICATING
SIGNIFICANT DEEPENING BY NEXT THURS. IN THE INTERIM...UPPER PATTERN
WILL FAVOR CONTD DRY WX OVER THE CWA WITH TEMPS NOT STRAYING TOO FAR
FROM CLIMO.

.HNX...NONE.

JSN

Nearby

Severe Thunderstorm Warnings in California, 2001Every severe thunderstorm warning in 2001

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.