Alert archive / California / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 2, NWS Hanford, CA

February 10, 2001Fresno County, Madera County, California

NWS Hanford, CA issued this severe thunderstorm warning at Feb 10, 2001, 4:27 PM PST for Fresno County, Madera County, California. It was in force for 63 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
Feb 10, 2001, 4:27 PM PST (00:27 UTC)
Expired
Feb 10, 2001, 5:30 PM PST
In force
63 min
Issued by
NWS Hanford, CA
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Fresno County, CA, Madera County, CA

The radar

The San Joaquin Valley radar (KHNX), 103 km from the middle of the area, began a volume at 00:28 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 00:00Z, 0.5 hours before the alert went out and 250 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 00:00Z on 2001-02-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 27 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 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 00:00Z on 2001-02-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 square meters per square second.19395878Sfc1 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
27 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
833 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
123 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS56 KHNX 110027
SVRFAT
CAC019-039-110130-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
427 PM PST SAT FEB 10 2001

THE NATIONAL WEATHER SERVICE IN HANFORD CA HAS ISSUED A

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

* UNTIL 530 PM PST

* AT 423 PM PST...RADAR SHOWED A SEVERE THUNDERSTORM OVER MILLERTON
  LAKE...OR ABOUT 17 MILES NORTH OF CLOVIS...MOVING EAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  OVER AUBERRY AT 455 PM PST
  3 MILES SOUTH OF SHAVER LAKE AT 520 PM PST

* OTHER LOCATIONS IN THE WARNING INCLUDE NORTH FORK...HUNTINGTON LAKE
  AND BASS LAKE

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG
BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY
LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY
FROM WINDOWS UNTIL THE STORM HAS PASSED.

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 3715 11979 3697 11979 3707 11895 3741 11908
          3760 11927

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 Feb 10, 3:50 PM PST, 37 minutes earlier.

Area forecast discussion, Feb 10, 3:50 PM PST, 37 minutes before
INTERIOR CENTRAL CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HANFORD CA
350 PM PST SAT FEB 10 2001

DELAYED DUE TO SEVERE WX IN PROGRESS. FIRST STORM SYSTEM IS WINDING
DOWN LATE THIS AFTERNOON AND EARLY THIS EVE OVER CNTRL CA WHILE THE
INITIAL TROUGH AXIS SHIFTS EAST OF SIERRA CREST. STILL MONITORING A
FEW HEAVIER SHOWERS AND ISOLATED TSTMS WITH HAIL AT THIS TIME...
WHICH WILL DIMINISH EARLY THIS EVENING.

NEXT SYSTEM VERY QUICK ON ITS HEELS PROMISES TO BE AN EVEN BIGGER
SNOW MAKER FOR THE SOUTHERN SIERRA NEVADA AND KERN COUNTY MTNS BY
VIRTUE OF SLOW MOVEMENT/LONG DURATION...WITH NEARLY IDEAL STRONG
OROGRAPHIC FLOW AND LOTS OF DEEP MOIST LIFT DURING SUN TO SUN NIGHT.
ETA/AVN SOLUTIONS NOT FAR FROM EACH OTHER...A FEW INITIALIZATION
PROBLEMS ON 12Z...BUT MIDDLE OF ROAD SOLUTION ON TRACK. EXPECT SNOW
AMOUNTS UP TO 2-3 FEET OVER HIGHER ELEV SIERRA...8 TO 16 INCHES KERN
MTNS...6 TO 12 INCHES NEAR 3000 FT IN FOOTHILLS AND SEVERAL INCHES
ACCUM BELOW 3000 FT. ETA SHOWS TIGHT GRADS WITH ADVANCING STORM FOR
GUSTY LLVL SE WINDS ON SUNDAY AND STRONG SW FLOW FROM 850MB UP.

STRONG STORM SHOULD START TO WIND DOWN BY EARLY MONDAY IN NORTH
SECTIONS NEAR YOSEMITE...HOWEVER FURTHER SOUTH IF SLOWER TIMING
OCCURS THE SIGNIFICANT PRECIP COULD EXTEND MUCH OF THE DAY MONDAY IN
AND AROUND KERN COUNTY. WITH HIGH CONFIDENCE AND TO PUT IN CLOSER
COORD WITH LOX HAVE POSTED WINTER STORM WARNING FOR SUNDAY TO MONDAY
MORN. OTHER ITEM TO WATCH WILL BE LOWERING SNOW LEVELS ON MONDAY AND
TUESDAY AS UNSTABLE SHOWERY WINTER WX PERSISTS AND COLDEST CORE OF
UPPER SYSTEM MOVES NEARBY...DROPPING FRZG LEVELS EVEN LOWER. WILL BE
POSSIBLE TO SEE SIGNIFICANT SNOW NEAR FOOTHILLS ON WEST SIDE OF SAN
JOAQUIN VLLY...AND ALSO IN KERN DESERT. INSTABILITY ALSO WILL
SUPPORT CHC TSTMS MANY LOCATIONS.

IN EXTENDED...UNSTABLE SHOWERY CONDS TUE WITH CONTINUED CHC TSTMS.
GRADUALLY ACTIVITY WILL DECREASE THRU WEDS AND END BY THURS. WILL
CONTINUE TO FOLLOW MED RANGE SOLUTIONS ADVERTISING A RIDGE AND
RETURN TO DRY LATE THIS WEEK.

.HNX...WINTER STORM WARNING LATE TONIGHT THROUGH SUNDAY NIGHT FOR
       THE SOUTHERN SIERRA NJEVADA NORTH OF KERN COUNTY.
    ...WINTER STORM WARNING SUNDAY THROUGH MONDAY MORNING FOR THE
       KERN COUNTY MOUNTAINS.

LAVIS

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 10, 5:27 PM PSTSevere Thunderstorm WarningHNXFresno33 min

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.