California, 2015Flood in California, June 12, 2015
June 12, 2015 · NWS SGX · 1 event in 1 county or zone
An upper-level trough developed along the central California coast and dropped south before moving inland over the high desert of southern California during the afternoon. This produced scattered showers and thunderstorms over the San Bernardino Mountains and high desert with some locally intense rainfall and small hail.
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- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
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- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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.
An upper-level trough developed along the central California coast and dropped south before moving inland over the high desert of southern California during the afternoon. This produced scattered showers and thunderstorms over the San Bernardino Mountains and high desert with some locally intense rainfall and small hail. Rainfall amounts were generally one-tenth to one-third of an inch with a few higher totals in Phelan (1.20 inches) and Antelope Creek (0.47 inches). Minor flooding was reported in Phelan and Wrightwood with a few rock and debris slides along Highways 2 and 138. Two urban/small stream flood advisories were issued for the high desert during this event. One-half inch hail was reported near Wrightwood, and one-quarter inch hail near Lucern Valley.
What forecasters said that day
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 San Diego, CA wrote its last area forecast discussion before the first event at Jun 12, 12:42 PM PST, 2 hours 18 minutes earlier.
Area forecast discussion, Jun 12, 12:42 PM PST, 2 hours 18 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
142 PM PDT FRI JUN 12 2015
.SYNOPSIS...
AN UPPER-LEVEL LOW WILL CONTINUE THE POSSIBILITY OF ISOLATED TO
SCATTERED SHOWERS AND THUNDERSTORMS OVER THE HIGH DESERTS THROUGH
THIS EVENING AND OVER THE SAN BERNARDINO AND RIVERSIDE COUNTY
MOUNTAINS THROUGH SATURDAY. UPPER-LEVEL HIGH PRESSURE BUILDING
ACROSS THE REGION WILL CREATE SIGNIFICANT WARMING INLAND AND A
MUCH SHALLOWER MARINE LAYER EARLY TO MID NEXT WEEK.
&&
.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
AT 1 PM PDT...WATER VAPOR SATELLITE IMAGERY DISPLAYED AN UPPER-
LEVEL LOW NEAR DEATH VALLEY...AND A BROAD UPPER-LEVEL RIDGE
AROUND 600 MILES OFF THE WEST COAST. COMPOSITE RADAR SHOWED A FEW
LIGHT SHOWERS DEVELOPING OVER THE SAN BERNARDINO COUNTY MOUNTAINS
AND THE HIGH DESERTS. VISIBLE SATELLITE SHOWED MARINE LAYER CLOUDS
LINGERING OVER THE COAST AND COASTAL VALLEYS. AIRPLANE SOUNDINGS
OUT OF KSAN SHOWED A STRONG 10 DEG C MARINE LAYER INVERSION WHICH
IS HELPING TO KEEP STRATUS ALONG THE COAST THIS AFTERNOON. THE
12/1200 UTC ECMWF AND GFS ARE IN RELATIVELY GOOD AGREEMENT THROUGH
THE MID-TERM.
THE AFOREMENTIONED UPPER-LEVEL LOW WILL CONTINUE SOUTH INTO THE
HIGH DESERTS REGION THIS AFTERNOON...EXITING THE REGION SATURDAY.
MOISTURE ADVECTION IN THE MID-LEVELS...DIURNAL HEATING AND UPPER-
LEVEL DYNAMICS WILL CONTINUE THE POSSIBILITY OF ISOLATED TO
SCATTERED SHOWERS AND THUNDERSTORMS IN THE HIGH DESERTS AND SAN
BERNARDINO AND RIVERSIDE COUNTY MOUNTAINS THROUGH THIS EVENING.
SLOW STORM MOTION WILL CREATE A SMALL POSSIBILITY OF FLASH
FLOODING WHERE HEAVIER SHOWERS DEVELOP. ADDITIONALLY...A DRY LAYER
IN THE LOWER LEVELS DEPICTED ON FORECAST SOUNDINGS WILL SUPPORT
THE POSSIBILITY OF STRONG GUSTY DOWNDRAFT WINDS NEAR STORMS. SMALL
HAIL AND LIGHTNING WILL ALSO BE THREATS FROM THUNDERSTORMS THIS
AFTERNOON...AS WELL. ISOLATED THUNDERSTORMS WILL BE POSSIBLE
THROUGH THE EVENING NEAR THE HIGHEST MOUNTAIN PEAKS AS THE LOW
TRANSITIONS ACROSS THE REGION...AND AGAIN TOMORROW AFTERNOON WITH
PEAK HEATING. A DEEP MARINE LAYER WILL HELP LOW CLOUDS SURGE WELL
INLAND AGAIN TONIGHT...WITH PATCHY DRIZZLE POSSIBLE.
UPPER-LEVEL HIGH PRESSURE WILL THEN BUILD TO OUR WEST THROUGH MOST
OF NEXT WEEK. THE DIFFERENCES IN THE LATEST MODEL RUNS ARE HOW FAR
EAST THIS RIDGE WILL EXTEND MID TO LATE NEXT WEEK. THE GFS IS THE
WARMEST AND PROGGS 850 MB TEMPS NEAR 32 DEG C OVER THE HIGH
DESERTS BY NEXT FRIDAY...WHILE THE ECMWF KEEPS THE RIDGE FURTHER
WEST...ONLY FORECASTING 850 MB TEMPS NEAR 27 DEG C OVER THE SAME
AREA. GIVEN THE DIFFERENCES...WILL LEAN TOWARDS A COOLER SOLUTION
FOR NOW. EXPECT RISING HEIGHTS ALOFT TO CREATE A MUCH SHALLOWER
MARINE AND A WARM-UP INLAND NEXT WEEK...WITH TUESDAY CURRENTLY
FORECAST TO BE THE WARMEST DAY AS HIGHS IN THE VALLEYS AND INLAND
EMPIRE COULD RISE TO AROUND 10 DEG F ABOVE SEASONAL NORMALS.
&&
.AVIATION...
122020Z...COAST/VALLEYS...THIS AFTERNOON AND EARLY EVENING...SCT-
BKN FL200 WITH UNRESTRICTED VIS INLAND BEYOND 15-20SM FROM THE
IMMEDIATE COAST. WITHIN 10...TO LOCALLY 20 MILES OF THE IMMEDIATE
COAST WIDESPREAD MARINE STRATUS WITH BASES BKN-OVC 1000-1500 FT
MSL AND TOPS 2500-3000 FT MSL. THE CIGS MAY BREAK LOCALLY AT TIMES
BEFORE 00Z...THEN FILL BACK IN AND SPREAD BACK ONTO THE COASTAL
MOUNTAIN FOOTHILLS THROUGH 06Z SAT. LITTLE CHANGE OVERNIGHT...WITH
AREAS OF CIGS FALLING TO 500-900 FT MSL AND 3-5SM VIS RESTRICTIONS
IN BR/-DZ AFTER 06Z THROUGH 15Z SAT. CONFIDENCE MODERATE TO HIGH
FOR TIMING AND EXTENT OF CIGS...AND MODERATE FOR CIG HEIGHT
CATEGORY.
MTNS/DESERTS...SCT-BKN CIGS AOA 8000 FT...MAINLY NORTH OF SAN
DIEGO COUNTY WITH ISOLD-SCT TSRA/-TSRA AND ISOLD TOPS FL350 WITH
ASSOCIATED STRONG UP/DOWN DRAFTS AND LLWS. THROUGH AND BELOW THE
SAN GORGONIO PASS FROM 22Z FRI-10Z SAT...WEST WINDS OF 25-30 KTAT
TIMES WITH ASSOCIATED LLWS.
&&
.MARINE...
130 PM...NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH TUESDAY.
&&
.SKYWARN...
SKYWARN ACTIVATION MAY BE REQUESTED THIS AFTERNOON.
&&
.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...NONE.
&&
PUBLIC...JJT
AVIATION/MARINE...JAD
Flood, San Bernardino
- When
- June 12, 3:00 PM PST to 6:00 PM PST
- Where
- San Bernardino County, 5.69 mi NE of Adelanto El Mirge Apt to 7.21 mi SE of Pinon Hills
- Cause
- Heavy Rain
- Reported by
- Law Enforcement
- Coordinates
- 34.667, -117.518
CHP reported water build-up, north of Apple Valley, at the Dale Evans Parkway offramp from I-15 causing vehicles to slide. CHP also reported rock and mud slides into the slow lane, which was shut down near Phelan, as well as Highway 18 flooded west of Victorville with debris in the roadway. A resident near Baldy Mesa reported debris at the junction of Highways 138 and 2.
- Flood
- Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Damaging Winds in Pennsylvania, June 12, 20151 death · $139,000 · 50 kt wind · 34 events
- Flood and Hail in Texas, June 12, 20151 injured · $5.3 million · 2.75 in hail · 16 events
- Hail and Damaging Winds in New York, June 12, 2015$338,000 · 1.75 in hail · 43 events
- Damaging Winds in New York, June 12, 2015$440,000 · 50 kt wind · 33 events
- Flooding in Iowa, June 12 to 17, 2015$1.4 million · 4 events
- Damaging Winds in Pennsylvania, June 12, 2015$29,000 · 50 kt wind · 36 events
- Damaging Winds in Ohio, June 12, 2015$62,000 · 56 kt wind · 13 events
- Damaging Winds in Ohio, June 12, 2015$41,000 · 56 kt wind · 14 events
- Damaging Winds in Ohio, June 12, 2015$40,000 · 50 kt wind · 13 events
- Tornado and Flash Flood in Texas, June 12, 2015$40,000 · EF0 · 12 events
- Damaging Winds in Indiana, June 12, 2015$32,000 · 65 kt wind · 11 events
- Damaging Wind in Pennsylvania, June 12, 2015$50,000 · 50 kt wind · 1 event
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: 587158.