Alert archive / California / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 7, NWS Hanford, CA

April 13, 2000Fresno County, Madera County, California

NWS Hanford, CA issued this severe thunderstorm warning at Apr 13, 2000, 3:18 PM PDT for Fresno County, Madera County, California. It was in force for 47 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
Apr 13, 2000, 3:18 PM PDT (22:18 UTC)
Expired
Apr 13, 2000, 4:05 PM PDT
In force
47 min
Issued by
NWS Hanford, CA
Area
Whole counties

Counties Fresno County, CA, Madera County, CA

The radar

The San Joaquin Valley radar (KHNX), 75 km from the middle of the area, began a volume at 22:18 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

Oakland, CA (KOAK), launched 12:00Z, 10.3 hours before the alert went out and 235 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, Oakland, CA at 12:00Z on 2000-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 51 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, Oakland, CA at 12:00Z on 2000-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.1939587897117136Sfc1 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
51 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
769 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS56 KHNX 132219
SVRFAT
CAC019-039-132305-

BULLETIN-EAS ACTIVATION REQUIRED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HANFORD CA
318 PM PDT THU APR 13 2000

THE NATIONAL WEATHER SERVICE IN HANFORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN MADERA COUNTY IN CENTRAL CALIFORNIA
  CENTRAL FRESNO COUNTY IN CENTRAL CALIFORNIA

* UNTIL 405 PM PDT

* AT 315 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 10 MILES SOUTHEAST OF MADERA... MOVING
  NORTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  NEAR HIGHWAY 99 ALONG THE SAN JOAQUIN RIVER AND PINEDALE IN
  FRESNO COUNTY AND NEAR AVENUE SEVEN IN MADERA BETWEEN 330 PM AN_D
  345 PM.

LARGE HAIL IS LIKELY WITH THIS STORM.
THIS IS A DANGEROUS STORM! STAY INDOORS AWAY FROM WINDOWS.

TAL

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 13, 9:45 AM PDT, 5 hours 33 minutes earlier.

Area forecast discussion, Apr 13, 9:45 AM PDT, 5 hours 33 minutes before
INTERIOR CENTRAL CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
945 AM PDT THU APR 13 2000

BROAD UPPER LOW STARTING TO FILL...CENTER LOCATED NEAR 41N/129W THIS
MORN. LOW WILL PROGRESS A LITTLE CLOSER TO COAST TODAY WHILE UPPER
JET AXIS NEAR 90KT IS SITUATED OVER THE CWA. BAND OF CLOUDS AND
SHOWERS NEARLY STATIONARY OVER FRESNO/KINGS/N TULARE COUNTIES. PROGS
INDICATE THAT VORT AXIS ASSOCIATED WITH THE JET WILL STRING OUT OVER
THE DISTRICT FOR THE REMAINDER OF THE DAY AND WILL LIKELY KEEP THE
PRESENT MSTR/CLD BAND NEARLY STNRY WITH SLIGHT E/SE PROGRESS THIS
AFTN. AIRMASS IS MODERATELY UNSTABLE WITH HTNG...MODIFIED FCST
SOUNDINGS AND LATEST 12Z ETA SHOW CAPES UP TO 500-700 J/KG THIS AFTN
AND EARLY THIS EVE. THINK WE/LL SEE A DIURNAL RESURGENCE OF ACTIVITY
THRU THE REMAINDER OF THE DAY THUS UPDATING MOST ZNS FOR INCREASE IN
POPS. WILL GO LIKELY N OF BAKERSFIELD...WITH ELEVATED LOW TO MID LVL
MSTR THE BREAKS IN CLOUDINESS NEAR MERCED COUNTY AND NW FRESNO
COUNTY SHOULD FILL IN AND ALSO HELP DESTABILIZE. BUMPED POPS IN THE
S END AS SUNSHINE IN PROGRESS WILL ALLOW FOR DIFFERENTIAL HTNG THAT
MAY HELP SET OFF SOME CONVECTION LATER. ALSO INTRODUCED MENTION OF
TSTM POSSIBILITIES INTO EVENING HOURS/2ND PERIOD GIVEN THE ABOVE.
FOR EAST KERN COUNTY NIL CLOUDS THIS MORN SO ALSO ADJUSTED TEMPS FOR
KERN DESERT.

REST OF FCST LOOKS ON TRACK WITH THE UPPER LOW OPENING UP FURTHER
AND ANOTHER DIGGING WAVE TONIGHT HELPING TO PUSH THE MAIN TROUGH
AXIS INLAND...PASSING THROUGH MOST OF THE CWA FRI MORN. IDEA THAT
WE/LL SEE ANOTHER DECENT SHOT AT PCPN WITH PASSAGE OF TROF AXIS
CONTINUES TO LOOK GOOD. MAY NEED TO BUMP POPS A BIT FURTHER ON AFTN
PKG.

FROM QUICK LOOK AT THE WINDS DO NOT EXPECT ADVIS LEVEL WINDS TDA FOR
KERN MTNS/DESERT...HOWEVER WILL BE A POSSIBILITY TO CONSIDER FOR FRI
AS WNW FLOW ALIGNS THRU A DEEP LAYER AND SUBSIDENCE INCREASES IN THE
AFTN.

.HNX...NONE.

LAVIS

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 13, 3:52 PM PDTSevere Thunderstorm WarningHNXMadera43 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; radar from the NEXRAD Level II archive.