A slow moving upper level low produced some strong thunderstorms developed over Central California. This upper low had also produced some showers and thunderstorms in days prior leading to antecedent conditions.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS HNX wrote it up.
A slow moving upper level low produced some strong thunderstorms developed over Central California. This upper low had also produced some showers and thunderstorms in days prior leading to antecedent conditions.
The local office's own words before the first event, 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 the first event at Jun 12, 1:30 PM PST, 2 hours 50 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
230 PM PDT FRI JUN 12 2015
.SYNOPSIS...
AN UPPER LEVEL LOW WILL CONTINUE TO TRACK SLOWLY EASTWARD AND EXIT
INTO THE GREAT BASIN. THIS WEEKEND WILL HAVE A RETURN TO HIGHER
PRESSURE AS WELL ABOVE NORMAL TEMPERATURES AND DRIER CONDITIONS HIT
THE AREA. SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE OVER
THE MOUNTAINS AND KERN DESERTS THIS AFTERNOON AND EVENING.
&&
.DISCUSSION...
ANOTHER DAY OF CONVECTIVE ACTIVITY ACROSS CENTRAL CALIFORNIA AS
SHOWERS AND THUNDERSTORMS DOMINATE THE SOUTHERN SECTIONS OF THE
DISTRICT. TODAY/S CONVECTIVE ACTIVITY IS RECEIVING ADDITIONAL
SUPPORT FROM A PIECE OF VORT MAX ENERGY CURRENTLY MOVING THROUGH
THE SOUTHERN CALIFORNIA. SATELLITE IMAGERY IS ABLE TO PICK UP ON
THE CIRCULATION AS THE FLOW NEAR YOSEMITE IS FROM THE EAST WHILE
THE GRAPEVINE HAS A NORTHERLY FLOW. SO FAR TODAY...ADIABATIC
DRYING HAS PREVENTED ANY CONVECTIVE ACTIVITY TO REACH THE VALLEY
FLOOR. HOWEVER...AS THE ATMOSPHERE MOISTENS...COULD SEE A SHOWER
REACH THE SANGER TO VISALIA...TO PORTERVILLE AREA. MODELS STILL
SHOWING SIGNIFICANT INSTABILITY OVER THE SOUTHERN PORTION OF
CENTRAL CALIFORNIA THROUGH THE DAY-LIGHT HOURS BEFORE MORE STABLE
AIR ENTERS THE REGION.
SATURDAY WILL HAVE THE VORT MAX MOVING INTO SOUTHERN ARIZONA AS
ONSHORE FLOW PUSHES MORE STABLE AIR INTO CALIFORNIA. AT THAT
POINT...WILL HAVE CONVECTION CONFINED TO THE HIGHER TERRAIN OF THE
SIERRA NEVADA AND TEHACHAPI RANGE. THIS SHIFT WILL ALLOW THE FLAT
RIDGE TO SHIFT EASTWARD AND MORE OVER CALIFORNIA. THE SHIFT WILL
ALLOW FOR FURTHER WARMING OF TEMPERATURES AS REACH WELL BEYOND THE
CENTURY MARK ACROSS MOST OF THE SAN JOAQUIN VALLEY. DUE TO THE
PASSAGE OF A TROF OVER THE RIDGE TO PRODUCE A FLAT PATTERN...THE
RIDGE WILL NOT HAVE THE STRENGTH TO PREVENT ANY ADDITIONAL TROF
FROM PUSHING ONSHORE. THEREFORE...A MORE ZONAL FLOW PATTERN WILL
DEVELOP TOWARD THE BEGINNING OF NEXT WEEK. WITH THIS...SATURDAY
MAY SEE THE PEAK IN DAY TIME HEATING BEFORE A COOL DOWN BEGINS ON
SUNDAY. WHILE NOT A TRUE TROF PASSAGE TOWARD THE LATER PERIODS OF
THE EXTENDED...THE FLOW WILL BECOME MORE ZONAL BEFORE THE MIDDLE
OF NEXT WEEK.
WILL SEE A GRADUAL COOL DOWN TO KEEPING THE DISTRICT BELOW THE
CENTURY MARK. THE STRONGER ONSHORE FLOW PATTERN WILL ALLOW FOR THE
TERMINATION OF SHOWERS AND THUNDERSTORMS OVER CENTRAL CALIFORNIA
BY THE END OF THE WEEKEND. LONGER RANGE MODELS THEN ATTEMPT TO
KEEP THE ZONAL FLOW PATTERN THROUGH AT LEAST THE MIDDLE OF NEXT
WEEK WITH A SLIGHT CHANGE IN THE FLOW TOWARD NEXT THURSDAY. GFS
MOD-TREND/ECMWF BOTH SHOWING THE PASSAGE OF A WEAK TROF BY NEXT
FRIDAY. YET...MODEL ANALYSIS SHOWS LIMITED MOISTURE ONTO THE WEST
COAST LATER NEXT WEEK AS THE SURGE OF SUBTROPICAL MOISTURE REMAINS
NORTH OF HAWAII. THEREFORE...WINDS AND TEMPERATURES BEING THE
BIGGEST INFLUENCE ON THE REGION. MODEL CONSENSUS IS GROWING TOWARD
THIS PATTERN AS MODEL CERTAINTY INCREASES TOWARDS THIS SOLUTION.
&&
.AVIATION...
SCATTERED SHOWERS AND THUNDERSTORMS WILL PROVIDE FOR AREAS OF MVFR
AND LOCAL IFR IN LOW CLOUDS...PRECIPITATION AND MOUNTAIN OBSCURATION
OVER THE FOOTHILLS AND HIGHER ELEVATIONS OF THE SOUTHERN SIERRA
NEVADA AND TEHACHAPI MOUNTAINS UNTIL 06Z SAT. OTHERWISE...VFR
CONDITIONS ARE EXPECTED DURING THE NEXT 24 HOURS.
&&
.AIR QUALITY ISSUES...
ON SATURDAY JUNE 13 2015... UNHEALTHY FOR SENSITIVE GROUPS IN
FRESNO... KERN... KINGS AND TULARE COUNTIES AND SEQUOIA NATIONAL
PARK AND FOREST.
FURTHER INFORMATION IS AVAILABLE AT VALLEYAIR.ORG
&&
.CERTAINTY...
THE LEVEL OF CERTAINTY FOR DAYS 1 AND 2 IS HIGH.
THE LEVEL OF CERTAINTY FOR DAYS 3 THROUGH 7 IS MEDIUM.
THIS INFORMATION IS PROVIDED AS PART OF A TRIAL PROJECT CONDUCTED
BY THE NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD.
CERTAINTY LEVELS INCLUDE LOW...MEDIUM...AND HIGH. PLEASE VISIT
WWW.WEATHER.GOV/HNX/CERTAINTY.PHP /ALL LOWER CASE/ FOR ADDITIONAL
INFORMATION AND/OR TO PROVIDE FEEDBACK.
&&
.CLIMATE...
RECORDS
SITE DATE HI_MAX:YEAR LO_MAX:YEAR HI_MIN:YEAR LO_MIN:YEAR
KFAT 06-12 107:1985 66:1998 73:1985 47:1952
KFAT 06-13 107:1949 69:1922 71:1985 47:1907
KFAT 06-14 108:1966 65:1962 72:2007 42:1907
KBFL 06-12 110:1979 63:1998 75:1979 38:1907
KBFL 06-13 106:1940 75:1907 76:1975 41:1907
KBFL 06-14 111:1961 70:1962 78:1975 43:1907
&&
.HNX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&
PUBLIC...MOLINA
AVN/FW...JEB
SYNOPSIS...WP
WEATHER.GOV/HANFORDHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 713 AM PDT FRI JUN 12 2015 CAZ096-097-131230- SIERRA NEVADA FROM YOSEMITE TO KINGS CANYON- TULARE COUNTY MOUNTAINS- 713 AM PDT FRI JUN 12 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE HIGHER ELEVATIONS OF THE SOUTHERN SIERRA NEVADA. ...AFTERNOON THUNDERSTORMS... .DAY ONE...TODAY AND TONIGHT * TIMING: THIS AFTERNOON AND EVENING. * LOCATIONS INCLUDE: THE SIERRA NEVADA FROM YOSEMITE TO KERN COUNTY. * IMPACTS: THUNDERSTORMS WILL PRODUCE DEADLY LIGHTNING AS WELL AS BRIEF HEAVY RAINS AND GUSTY WINDS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY * TIMING: SATURDAY AFTERNOON AND EVENINGS. * LOCATIONS INCLUDE: THE SIERRA NEVADA FROM YOSEMITE TO KERN COUNTY. * IMPACTS: THUNDERSTORMS WILL PRODUCE DEADLY LIGHTNING AS WELL AS BRIEF HEAVY RAINS AND GUSTY WINDS. * STAY TUNED TO NOAA WEATHER RADIO...OR YOUR FAVORITE NEWS SOURCE...FOR FURTHER INFORMATION. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION IS NOT ANTICIPATED. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE. CAZ095-131230- KERN COUNTY MOUNTAINS- 713 AM PDT FRI JUN 12 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE KERN COUNTY MOUNTAINS. ...AFTERNOON THUNDERSTORMS... .DAY ONE...TODAY AND TONIGHT * TIMING: THIS AFTERNOON AND EVENING. * LOCATIONS INCLUDE: TEHACHAPI...PINE MOUNTAIN CLUB...LAKE ISABELLA...FRAZIER PARK. * IMPACTS: THUNDERSTORMS WILL PRODUCE DEADLY LIGHTNING AS WELL AS BRIEF HEAVY RAINS AND GUSTY WINDS. * STAY TUNED TO NOAA WEATHER RADIO...OR YOUR FAVORITE NEWS SOURCE...FOR FURTHER INFORMATION. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION IS NOT ANTICIPATED. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE. CAZ098-099-131230- INDIAN WELLS VALLEY-SOUTHEASTERN KERN COUNTY DESERT- 713 AM PDT FRI JUN 12 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE KERN COUNTY DESERT. ...AFTERNOON THUNDERSTORMS... .DAY ONE...TODAY AND TONIGHT * TIMING: THIS AFTERNOON AND EVENING. * LOCATIONS INCLUDE: MOJAVE...ROSAMOND...CHINA LAKE...RIDGECREST. * IMPACTS: THUNDERSTORMS WILL PRODUCE DEADLY LIGHTNING AS WELL AS BRIEF HEAVY RAINS AND GUSTY WINDS. * STAY TUNED TO NOAA WEATHER RADIO...OR YOUR FAVORITE NEWS SOURCE...FOR FURTHER INFORMATION. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION IS NOT ANTICIPATED. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE. SANGER WEATHER.GOV/HANFORD
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HANFORD CA
334 PM PDT FRI JUN 12 2015
...TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
...DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0230 PM DEBRIS FLOW 9 ENE MOUNTAIN MESA 35.67N 118.27W
06/12/2015 KERN CA LAW ENFORCEMENT
ROADWAY FLOODING REPORTED BY CHP. WATER AND
MUD KELSO CREEK RD/SR178
&&
WPPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HANFORD CA
443 PM PDT FRI JUN 12 2015
...TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
...DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0400 PM DEBRIS FLOW 2 WNW TEHACHAPI 35.14N 118.47W
06/12/2015 KERN CA LAW ENFORCEMENT
WB HWY58 CLOSED AT MM144 DUE TO MUDSLIDE.
&&
WPThe Edwards AFB radar (KEYX), 83 km away, was scanning. The volume nearest the first event began at 00:21 UTC.
1 flash flood. Local standard time, as filed.
Over two inches of rain fell over Tehachapi during the afternoon of the 12th. This resulted in a mud/debris flow near highway 58 and highway 202 in the center of Tehachapi, which closed the roadway for a couple of hours.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2015Every state in 2015This day in weather historyWarnings in California, June 2015
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 586940.