Alert archive / California / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 2, NWS Los Angeles, CA
NWS Los Angeles, CA issued this severe thunderstorm warning at May 22, 2014, 3:34 PM PDT for Los Angeles County, California. It was in force for 41 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 22, 2014, 3:34 PM PDT (22:34 UTC)
- Expired
- May 22, 2014, 4:15 PM PDT
- In force
- 41 min
- Issued by
- NWS Los Angeles, CA
- Area
- Storm-based polygon
County Los Angeles County, CA
The radar
The Edwards AFB radar (KEYX), 65 km from the middle of the area, began a volume at 22:34 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 22, 4:05 PM PDT | FUNNEL CLOUD | 6 W Palmdale, CA | FUNNEL CLOUD REPORTED IN THE PALMDALE AREA. |
| May 22, 4:07 PM PDT | HAIL 0.88 | W Lancaster, CA | NICKEL SIZE HAIL IN LANCASTER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 10.6 hours before the alert went out and 214 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.
- Mixed-layer CAPE
- 5 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 806 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
985 WUUS56 KLOX 222234 SVRLOX CAC037-222315- /O.NEW.KLOX.SV.W.0002.140522T2234Z-140522T2315Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE OXNARD CA 334 PM PDT THU MAY 22 2014 THE NATIONAL WEATHER SERVICE IN OXNARD HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN LOS ANGELES COUNTY IN SOUTHWEST CALIFORNIA... * UNTIL 415 PM PDT * AT 330 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH HAIL AND WIND GUSTS TO 60 MPH. THIS STORM WAS LOCATED 7 MILES NORTHEAST OF PALMDALE...OR 9 MILES EAST OF LANCASTER...AND MOVING SOUTHWEST AT 20 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LITTLEROCK AND LAKE LOS ANGELES. LAT...LON 3446 11791 3461 11825 3483 11808 3473 11770 TIME...MOT...LOC 2233Z 064DEG 5KT 3469 11802 $$ DB/TH
2 follow-up statements
502 WWUS56 KLOX 222237 SVSLOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE OXNARD CA 337 PM PDT THU MAY 22 2014 CAC037-222315- /O.CON.KLOX.SV.W.0002.000000T0000Z-140522T2315Z/ LOS ANGELES CA- 337 PM PDT THU MAY 22 2014 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM PDT FOR NORTHEASTERN LOS ANGELES COUNTY... AT 334 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 7 MILES NORTHEAST OF PALMDALE...OR 9 MILES EAST OF LANCASTER...MOVING SOUTHWEST AT 20 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LITTLEROCK PRECAUTIONARY/PREPAREDNESS ACTIONS... DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM. WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 3446 11791 3461 11825 3483 11808 3473 11770 TIME...MOT...LOC 2236Z 064DEG 5KT 3469 11802 $$ HALL
529 WWUS56 KLOX 222258 SVSLOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE OXNARD CA 358 PM PDT THU MAY 22 2014 CAC037-222315- /O.CON.KLOX.SV.W.0002.000000T0000Z-140522T2315Z/ LOS ANGELES CA- 358 PM PDT THU MAY 22 2014 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM PDT FOR NORTHEASTERN LOS ANGELES COUNTY... AT 346 PM PDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 7 MILES NORTHEAST OF PALMDALE...OR 9 MILES EAST OF LANCASTER. THIS STORM WAS NEARLY STATIONARY. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SADDLEBACK BUTTE STATE PARK PRECAUTIONARY/PREPAREDNESS ACTIONS... DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM. WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. IN ADDITION TO HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY. LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. && LAT...LON 3446 11791 3461 11825 3483 11808 3473 11770 TIME...MOT...LOC 2257Z 180DEG 0KT 3469 11802 $$ HALL
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 Los Angeles, CA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 22, 1:15 PM PDT, 2 hours 19 minutes earlier.
Area forecast discussion, May 22, 1:15 PM PDT, 2 hours 19 minutes before
SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA 115 PM PDT THU MAY 22 2014 .SYNOPSIS... AN UPPER LEVEL LOW PRESSURE SYSTEM WILL BRING A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS TO PARTS OF THE AREA THROUGH THIS EVENING. AS THE UPPER LOW SLOWLY MOVES EAST AND HIGH PRESSURE RETURNS...A WARMING TREND IS EXPECTED THROUGH THE WEEKEND FOR INLAND AREAS. THE WARMING TREND WILL COME TO AN END EARLY NEXT WEEK AS A WEAK TROUGH APPROACHES FROM THE NORTH. && .SHORT TERM (TODAY-SUN)...AN UPPER LOW DROPPING OVER THE AREA TODAY IS CAUSING ISOLATED SHOWERS AND THUNDERSTORMS, MAINLY OVER VENTURA AND LA COUNTIES, THOUGH A FEW SPRINKLES OR LIGHT SHOWERS ARE POSSIBLE AS FAR WEST AS THE SANTA YNEZ VALLEY. THUNDERSTORMS SO FAR HAVE BEEN CONFINED TO THE MTNS, THOUGH A 20-25KT NORTHERLY STEERING FLOW IS CAUSING THOSE TO DRIFT SOUTH TOWARDS THE VALLEYS AND COAST. THE STEERING FLOW IS MUCH WEAKER CLOSER TO THE LOW CENTER OVER LA COUNTY SO SHOWERS AND THUNDERSTORMS THERE ARE MUCH SLOWER MOVING AND WILL LIKELY GENERATE MORE RAINFALL OVER ONE SPOT THAN THE STORMS TO THE WEST. SO FAR RAIN AMOUNTS HAVE BEEN LESS THAN A TENTH OF AN INCH TOTAL, BUT A DECREASE IN MID/UPPER LEVEL CLOUD COVERAGE THROUGH THE AFTERNOON AS WELL AS FURTHER DESTABILIZATION OF THE AIR MASS SHOULD LEAD TO STRONGER STORMS AND HEAVIER RAIN AMOUNTS. SHOWERS AND STORMS ARE EXPECTED TO DECREASE LATER IN THE EVENING AS WE LOSE THE HEATING AND THE UPPER LOW SHIFTS SOUTH AND EAST. WE SHOULD RETURN TO NORMAL CONDITIONS FRIDAY WITH A STANDARD MARINE LYR COVERAGE AND TEMPS NEAR NORMAL. MODELS DO SHOW SOME DECENT INSTABILITY OVER THE VENTURA/LA MTNS IN THE AFTERNOON BUT A SUBSTANTIAL DECREASE IN MOISTURE AND TEMPS ALOFT WARMING SHOULD PUT A DAMPER ON ANY TSTORM HOPES. WE LIKELY WILL SEE SOME AFTERNOON BUILDUPS OVER THE MTNS AND I DID BUMP POPS UP A FEW PERCENT BUT KEPT PRECIP OUT OF THE OFFICIAL FORECAST. HIGH PRESSURE WILL BUILD INTO THE AREA OVER THE WEEKEND LEADING TO A LOWERING, THOUGH STRENGTHENING MARINE INVERSION AND A WARMUP FOR AREAS AWAY FROM THE BEACHES. SHOULD SEE ABOUT A 3-5 DEGREE INCREASE IN HIGHS EACH DAY THIS WEEKEND, WITH VALLEYS IN THE MID 80S BY SUNDAY. LOW CLOUDS WILL REACH THE VALLEYS SATURDAY BUT PROBABLY NOT SUNDAY AS THE INVERSION LOWERS TO UNDER 1500 FT. A STRONG ONSHORE PUSH DURING THE AFTERNOON WILL LIKELY KEEP CLOUDS LINGERING NEAR THE BEACHES MOST OF THE DAY. .LONG TERM (MON-THU)...WARMEST DAY IN THIS STRETCH EXPECTED TO BE ON MEMORIAL DAY WITH VALLEYS CLOSE TO 90 AND HOPEFULLY EARLIER MARINE LYR BURNOFF FOR THE BEACHES. STILL A PRETTY STRONG ONSHORE FLOW SO AT LEAST SOME CLOUDS EXPECTED FOR COASTAL AREAS INTO THE AFTERNOON. THE RIDGE WILL START TO FLATTEN OUT TUE WITH WEAK TROFFING DEVELOPING ALONG THE COAST BY WED AND THU. THE ECMWF CONTINUES TO BE A LITTLE MORE AGRESSIVE WITH THE HEIGHT FALLS FOR MID WEEK BUT EITHER WAY WE'RE LOOKING AT A COOLING TREND STARTING TUESDAY WITH A SLOWLY DEEPENING MARINE LYR. && .AVIATION...22/1800Z. MID/UPPER LEVEL TROUGH OF LOW PRESSURE CENTERED EAST OF THE AREA WILL CONTINUE MOVING EAST. UPPER LEVEL STRONG NORTH WINDS WILL PREVAIL WHILE MID LEVEL LIGHT TO MODERATE EAST NORTHEAST WINDS BECOME LIGHT TO MODERATE NORTH NORTHWEST AFTER 23/20Z. ISOLATED THUNDERSTORMS OVER THE HIGHER TERRAIN WITH TOPS 35-40KFT WILL MOVE SOUTH OR REMAIN NEARLY STATIONARY. INCREASING STABILITY AND DECREASING MOISTURE AFTER 23/04Z. FREEZING LEVEL WAS APPROXIMATELY 9.5KFT THIS MORNING WILL DIFFER BY PLUS 2KFT AFTER 23/09Z. WEAK TO MODERATE ONSHORE PRESSURE GRADIENT THROUGH 23/06Z AND AFTER 23/20Z OTHERWISE WEAK GRADIENT. .KLAX...CHANCE CIGS 027 THROUGH 22/20Z THEN CHANCE CIGS 021 BETWEEN 23/09-23/20Z. .KBUR...CHANCE CIGS 023 THROUGH 22/20Z THEN CHANCE CIGS 035 BETWEEN 22/20-23/03Z. CHANCE CIGS 016 AFTER 23/10Z. VIRTUALLY CERTAIN - 95-100% VERY LIKELY - 80-95% LIKELY - 60-80% CHANCE - 30-60% VERY UNLIKELY - 20% OR LESS && .MARINE...22/100 PM. TROUGH OF LOW PRESSURE NEAR SHORE WILL SHIFT INLAND THIS EVENING. SMALL CRAFT ADVISORY CONDITIONS ARE POSSIBLE WITH GUSTS TO 25 KT IN AN AREA SOUTH OF POINT CONCEPTION TO SANTA ROSA ISLAND FOR A FEW HOURS THIS EVENING AS A RIDGE OF HIGH PRESSURE OVER THE EASTERN PACIFIC SHIFTS EAST OVER THE AREA. OTHERWISE SMALL CRAFT ADVISORY CONDITIONS ARE EXPECTED SATURDAY THROUGH SATURDAY NIGHT NORTH OF POINT CONCEPTION AND SATURDAY NIGHT IN THE VICINITY OF THE NORTHERN CHANNEL ISLANDS. THE NORTHWEST WINDS WILLL LIKELY INCREASE AGAIN SUNDAY AFTERNOON. LOCALLY GENERATED SHORT PERIOD SEAS FROM THE NORTHWEST AND SMALL LONG PERIOD SWELL FROM THE SOUTH WILL PERSIST. && .LOX WATCHES/WARNINGS/ADVISORIES... NONE && PUBLIC...MW AVIATION/MARINE...30 SYNOPSIS...SUKUP WWW.WEATHER.GOV/LOSANGELES
Hazardous weather outlook, May 21, 9:20 PM PDT, 18 hours 14 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA 920 PM PDT WED MAY 21 2014 CAZ034>041-044>046-051>054-059-087-088-547-548-221300- SAN LUIS OBISPO COUNTY CENTRAL COAST- SANTA BARBARA COUNTY CENTRAL COAST-SANTA YNEZ VALLEY- SAN LUIS OBISPO COUNTY INTERIOR VALLEYS-CUYAMA VALLEY- SANTA BARBARA COUNTY SOUTH COAST-VENTURA COUNTY COAST- LOS ANGELES COUNTY COAST INCLUDING DOWNTOWN LOS ANGELES- VENTURA COUNTY INTERIOR VALLEYS-VENTURA COUNTY COASTAL VALLEYS- SANTA MONICA MOUNTAINS RECREATIONAL AREA- SAN LUIS OBISPO COUNTY MOUNTAINS- SANTA BARBARA COUNTY MOUNTAINS-VENTURA COUNTY MOUNTAINS- LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA MONICA RANGE- ANTELOPE VALLEY-CATALINA ISLAND-SANTA CLARITA VALLEY- LOS ANGELES COUNTY SAN FERNANDO VALLEY- LOS ANGELES COUNTY SAN GABRIEL VALLEY- 920 PM PDT WED MAY 21 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA. .DAY ONE...TONIGHT A COLD UPPER LEVEL LOW PRESSURE SYSTEM WILL BRING A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS TO PORTIONS OF SOUTHWEST CALIFORNIA TONIGHT. .DAYS TWO THROUGH SEVEN... THURSDAY THROUGH TUESDAY A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS PORTIONS OF SOUTHWEST CALIFORNIA ON THURSDAY. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. GOMBERG
The office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 3:06 PM PDT | Areal Flood Advisory | LOX | 3 hr | |
| May 22, 4:03 PM PDT | Flash Flood Warning | LOX | Los Angeles | 3 hr |
| May 22, 4:10 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles | 65 min |
Nearby
Severe Thunderstorm Warnings in California, 2014Every severe thunderstorm warning in 2014
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.