Alert archive / California / Winter Storm Warnings in 2012
Winter Storm Warning 8, NWS San Diego, CA
NWS San Diego, CA issued this winter storm warning at Nov 9, 2012, 3:51 AM PST for San Diego County, California. It took effect at Nov 9, 2012, 6:00 PM PST. It was in force for 34 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
- Nov 9, 2012, 3:51 AM PST (11:51 UTC)
- In effect from
- Nov 9, 2012, 6:00 PM PST
- Expired
- Nov 9, 2012, 6:34 PM PST
- In force
- 34 min
- Issued by
- NWS San Diego, CA
County San Diego County, CA
The radar
The San Diego radar (KNKX), 28 km from the middle of the area, began a volume at 11:52 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
San Diego, CA (KNKX), launched 00:00Z, 11.9 hours before the alert went out and 47 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 739 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 171 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
651 WWUS46 KSGX 091151 WSWSGX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 351 AM PST FRI NOV 9 2012 ...SNOWFALL FOR THE MOUNTAINS FOR TONIGHT THROUGH SATURDAY MORNING WITH LOCALLY HEAVY SNOWFALL FOR THE SAN DIEGO COUNTY MOUNTAINS... .A COLD LOW PRESSURE FROM THE GULF OF ALASKA WILL BRING PERIODS OF SHOWERS THROUGH SATURDAY. THE SNOW LEVEL WILL LOWER TO 4500 TO 5000 FEET THIS AFTERNOON AND AROUND 4000 FEET FOR TONIGHT INTO SATURDAY. SNOWFALL COULD BE LOCALLY HEAVY AT TIMES IN THE SAN DIEGO MOUNTAINS LATE TONIGHT INTO SATURDAY MORNING. CAZ058-092200- /O.UPG.KSGX.WS.A.0007.121110T0200Z-121111T0200Z/ /O.NEW.KSGX.WS.W.0008.121110T0200Z-121110T2000Z/ SAN DIEGO COUNTY MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...CUYAMACA...MOUNT LAGUNA... RANCHITA 351 AM PST FRI NOV 9 2012 ...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO NOON PST SATURDAY ABOVE 4500 FEET... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A WINTER STORM WARNING ABOVE 4500 FEET FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO NOON PST SATURDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * ELEVATION...THE WINTER STORM WARNING IS FOR ELEVATIONS ABOVE 4500 FEET. * SNOW LEVELS...LOWERING TO 5000 FEET THIS AFTERNOON...AND AROUND 4000 FEET LATE TONIGHT INTO SATURDAY. * SNOW ACCUMULATIONS...3 TO 6 INCHES ABOVE 4500 FEET WITH LOCAL AMOUNTS OF 6 TO 12 INCHES ON THE HIGHER PEAKS. * LOCATIONS INCLUDE: CUYAMACA...MOUNT LAGUNA...RANCHITA * WINDS...AREAS OF WEST WINDS 20 TO 30 MPH WITH GUSTS TO 50 MPH. * VISIBILITY...REDUCED AT TIMES IN HEAVY SNOW...BLOWING SNOW... AND FOG. * IMPACTS...RESIDENTS AND TRAVELERS INTO HIGHER ELEVATIONS IN THE MOUNTAINS SHOULD BE PREPARED FOR HAZARDOUS WINTER WEATHER CONDITIONS AND POSSIBLE ROAD CLOSURES. IF POSSIBLE...CARRY CHAINS AND TAKE EXTRA FOOD AND CLOTHING. THIS WEATHER COULD BE DEADLY FOR UNPREPARED CAMPERS OR HIKERS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW ACCUMULATIONS THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ CAZ055-056-092200- /O.NEW.KSGX.WW.Y.0012.121110T0200Z-121110T2000Z/ SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...ANGELUS OAKS...BALDWIN LAKE... BARTON FLATS...BIG BEAR CITY...BIG BEAR LAKE...CRESTLINE... FAWNSKIN...FOREST FALLS...LAKE ARROWHEAD...MOUNT BALDY... MOUNTAIN HOME VILLAGE...RUNNING SPRINGS...TWIN PEAKS... WRIGHTWOOD...GARNER VALLEY...IDYLLWILD...PINE COVE...VISTA GRANDE 351 AM PST FRI NOV 9 2012 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO NOON PST SATURDAY ABOVE 4500 FEET... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A WINTER WEATHER ADVISORY ABOVE 4500 FEET FOR SNOW...WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO NOON PST SATURDAY. * ELEVATION...THE WINTER WEATHER ADVISORY IS IN EFFECT FOR ELEVATIONS ABOVE 4500 FEET. * SNOW LEVELS...LOWERING TO 4500 FEET THIS AFTERNOON...AND AROUND 4000 FEET TONIGHT INTO SATURDAY. * SNOW ACCUMULATIONS...2 TO 4 INCHES ABOVE 4500 FEET WITH LOCAL AMOUNTS OF 4 TO 8 INCHES ON THE HIGHER PEAKS. * LOCATIONS INCLUDE: GARNER VALLEY...IDYLLWILD...PINE COVE... VISTA GRANDE...ANGELUS OAKS...BALDWIN LAKE...BARTON FLATS... BIG BEAR CITY...BIG BEAR LAKE...CRESTLINE...FAWNSKIN... FOREST FALLS...LAKE ARROWHEAD...MOUNT BALDY...MOUNTAIN HOME VILLAGE...RUNNING SPRINGS...TWIN PEAKS...WRIGHTWOOD * WINDS...AREAS OF WEST WINDS 20 TO 30 MPH WITH GUSTS TO 50 MPH. * VISIBILITY...REDUCED AT TIMES IN SNOW...BLOWING SNOW... AND FOG. * IMPACTS...TRAVELERS THROUGH THE MOUNTAINS SHOULD BE PREPARED FOR HAZARDOUS WINTER WEATHER CONDITIONS. MOTORISTS ARE URGED TO CHECK THE LATEST ROAD REPORTS BEFORE DEPARTING. ALWAYS CARRY CHAINS AND TAKE EXTRA FOOD AND CLOTHING IF YOU MUST TRAVEL INTO THE MOUNTAINS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ FOR ROAD CONDITION INFORMATION IN CALIFORNIA...DIAL 8 0 0 4 2 7 7 6 2 3 IF INSIDE CALIFORNIA OR 9 1 6 4 5 5 7 6 2 3 IF OUTSIDE CALIFORNIA. YOU MAY ALSO GO TO THE CALTRANS WEBSITE TO CHECK FOR ROAD CONDITIONS AND CLOSURES AT: HTTP://WWW.DOT.CA.GOV/CGI- BIN/ROADS.CGI OR THE CALIFORNIA HIGHWAY PATROL (CHP) WEBSITE AT: HTTP://CAD.CHP.CA.GOV/ 17
2 follow-up statements
319 WWUS46 KSGX 092112 WSWSGX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 112 PM PST FRI NOV 9 2012 ...SNOWFALL FOR THE MOUNTAINS FOR TONIGHT THROUGH SATURDAY MORNING WITH LOCALLY HEAVY SNOWFALL FOR THE SAN DIEGO COUNTY MOUNTAINS... .A COLD LOW PRESSURE FROM THE GULF OF ALASKA WILL BRING PERIODS OF SHOWERS THROUGH SATURDAY. THE SNOW LEVEL WILL LOWER TO AROUND 4000 FEET TONIGHT INTO SATURDAY. SNOWFALL COULD BE LOCALLY HEAVY AT TIMES IN THE SAN DIEGO MOUNTAINS LATE TONIGHT INTO SATURDAY MORNING. CAZ058-100530- /O.CON.KSGX.WS.W.0008.121110T0200Z-121110T2000Z/ SAN DIEGO COUNTY MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...CUYAMACA...MOUNT LAGUNA... RANCHITA 112 PM PST FRI NOV 9 2012 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO NOON PST SATURDAY... * ELEVATION...THE WINTER STORM WARNING IS FOR ELEVATIONS ABOVE 4500 FEET. * SNOW LEVELS...LOWERING TO 5000 FEET THIS EVENING...AND AROUND 4000 FEET LATE TONIGHT INTO SATURDAY. * SNOW ACCUMULATIONS...3 TO 6 INCHES ABOVE 4500 FEET BUT LOCAL AMOUNTS OF 6 TO 12 INCHES ARE POSSIBLE ON THE HIGHER PEAKS. * LOCATIONS INCLUDE: CUYAMACA...MOUNT LAGUNA...RANCHITA * WINDS...AREAS OF WEST WINDS 20 TO 30 MPH WITH GUSTS TO 50 MPH. * VISIBILITY...REDUCED AT TIMES IN HEAVY SNOW...BLOWING SNOW...AND FOG. * IMPACTS...RESIDENTS AND TRAVELERS INTO HIGHER ELEVATIONS IN THE MOUNTAINS SHOULD BE PREPARED FOR HAZARDOUS WINTER WEATHER CONDITIONS AND POSSIBLE ROAD CLOSURES. IF POSSIBLE...CARRY CHAINS AND TAKE EXTRA FOOD AND CLOTHING. THIS WEATHER COULD BE DEADLY FOR UNPREPARED CAMPERS OR HIKERS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW ACCUMULATIONS THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ CAZ055-056-100530- /O.CON.KSGX.WW.Y.0012.121110T0200Z-121110T2000Z/ SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...ANGELUS OAKS...BALDWIN LAKE... BARTON FLATS...BIG BEAR CITY...BIG BEAR LAKE...CRESTLINE... FAWNSKIN...FOREST FALLS...LAKE ARROWHEAD...MOUNT BALDY... MOUNTAIN HOME VILLAGE...RUNNING SPRINGS...TWIN PEAKS... WRIGHTWOOD...GARNER VALLEY...IDYLLWILD...PINE COVE...VISTA GRANDE 112 PM PST FRI NOV 9 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING TO NOON PST SATURDAY... * ELEVATION...THE WINTER WEATHER ADVISORY IS IN EFFECT FOR ELEVATIONS ABOVE 4500 FEET. * SNOW LEVELS...LOWERING TO 4500 FEET THIS EVENING...AND AROUND 3500 TO 4000 FEET LATE TONIGHT INTO SATURDAY. * SNOW ACCUMULATIONS...2 TO 4 INCHES POSSIBLE ABOVE 4500 FEET...BUT LOCAL AMOUNTS OF 4 TO 8 INCHES COULD FALL ON THE HIGHER PEAKS. * LOCATIONS INCLUDE: GARNER VALLEY...IDYLLWILD...PINE COVE... VISTA GRANDE...ANGELUS OAKS...BALDWIN LAKE...BARTON FLATS... BIG BEAR CITY...BIG BEAR LAKE...CRESTLINE...FAWNSKIN... FOREST FALLS...LAKE ARROWHEAD...MOUNT BALDY...MOUNTAIN HOME VILLAGE... RUNNING SPRINGS...TWIN PEAKS...WRIGHTWOOD * WINDS...AREAS OF WEST WINDS 20 TO 30 MPH WITH GUSTS TO 50 MPH. * VISIBILITY...REDUCED AT TIMES IN SNOW...BLOWING SNOW...AND FOG. * IMPACTS...TRAVELERS THROUGH THE MOUNTAINS SHOULD BE PREPARED FOR HAZARDOUS WINTER WEATHER CONDITIONS. MOTORISTS ARE URGED TO CHECK THE LATEST ROAD REPORTS BEFORE DEPARTING. ALWAYS CARRY CHAINS AND TAKE EXTRA FOOD AND CLOTHING IF YOU MUST TRAVEL INTO THE MOUNTAINS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ JAD
608 WWUS46 KSGX 100234 WSWSGX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 634 PM PST FRI NOV 9 2012 ...SNOWFALL AND STRONG WINDS FOR THE MOUNTAINS TONIGHT THROUGH SATURDAY MORNING... .A COLD LOW PRESSURE FROM THE GULF OF ALASKA WILL BRING PERIODS OF SNOW SHOWERS THROUGH SATURDAY. THE SNOW LEVEL WILL BE AROUND 4000 FEET TONIGHT INTO SATURDAY. SNOWFALL COULD BE LOCALLY HEAVY AT TIMES LATE TONIGHT INTO SATURDAY MORNING. CAZ058-101215- /O.CAN.KSGX.WS.W.0008.000000T0000Z-121110T2000Z/ /O.EXA.KSGX.WW.Y.0012.000000T0000Z-121110T2000Z/ SAN DIEGO COUNTY MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...BOULEVARD...CAMERON...CAMPO... CUYAMACA...DESCANSO...JULIAN...LAKE HENSHAW...MORENA VILLAGE... MOUNT LAGUNA...OAK GROVE...PINE HILLS...PINE VALLEY...RANCHITA... SANTA YSABEL...WARNER SPRINGS 634 PM PST FRI NOV 9 2012 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON PST SATURDAY... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL NOON PST SATURDAY. THE WINTER STORM WARNING HAS BEEN CANCELLED. * ELEVATION...THE WINTER WEATHER ADVISORY IS IN EFFECT FOR ELEVATIONS ABOVE 4500 FEET. * SNOW LEVELS...4000 FEET TONIGHT INTO SATURDAY. * SNOW ACCUMULATIONS...2 TO 4 INCHES POSSIBLE ABOVE 4500 FEET... BUT LOCAL AMOUNTS OF 6 INCHES COULD FALL ON THE HIGHER PEAKS. * LOCATIONS INCLUDE: PALOMAR MOUNTAIN...CUYAMACA STATE PARK...MOUNT LAGUNA * WINDS...AREAS OF WEST WINDS 20 TO 30 MPH WITH GUSTS TO 45 MPH. * VISIBILITY...REDUCED AT TIMES IN SNOW...BLOWING SNOW...AND FOG. * IMPACTS...TRAVELERS THROUGH THE MOUNTAINS SHOULD BE PREPARED FOR HAZARDOUS WINTER WEATHER CONDITIONS. MOTORISTS ARE URGED TO CHECK THE LATEST ROAD REPORTS BEFORE DEPARTING. ALWAYS CARRY CHAINS AND TAKE EXTRA FOOD AND CLOTHING IF YOU MUST TRAVEL INTO THE MOUNTAINS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ CAZ055-056-101215- /O.CON.KSGX.WW.Y.0012.000000T0000Z-121110T2000Z/ SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...ANGELUS OAKS...BALDWIN LAKE... BARTON FLATS...BIG BEAR CITY...BIG BEAR LAKE...CRESTLINE... FAWNSKIN...FOREST FALLS...I-15 AT CAJON SUMMIT... I-15 AT 3500 FEET...LAKE ARROWHEAD...MOUNT BALDY... MOUNTAIN HOME VILLAGE...OAK GLEN...PHELAN...RUNNING SPRINGS... TWIN PEAKS...WRIGHTWOOD...AGUANGA...ANZA...GARNER VALLEY... IDYLLWILD...MOUNTAIN CENTER...PINE COVE...PINYON PINES... VISTA GRANDE 634 PM PST FRI NOV 9 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON PST SATURDAY... * ELEVATION...THE WINTER WEATHER ADVISORY IS IN EFFECT FOR ELEVATIONS ABOVE 4500 FEET. * SNOW LEVELS...4000 FEET TONIGHT INTO SATURDAY. * SNOW ACCUMULATIONS...1 TO 3 INCHES POSSIBLE ABOVE 4500 FEET... BUT LOCAL AMOUNTS OF 6 INCHES COULD FALL ON THE HIGHER PEAKS. * LOCATIONS INCLUDE: GARNER VALLEY...IDYLLWILD...PINE COVE... VISTA GRANDE...ANGELUS OAKS...BALDWIN LAKE...BARTON FLATS... BIG BEAR CITY...BIG BEAR LAKE...CRESTLINE...FAWNSKIN... FOREST FALLS...LAKE ARROWHEAD...MOUNT BALDY...MOUNTAIN HOME VILLAGE... RUNNING SPRINGS...TWIN PEAKS...WRIGHTWOOD * WINDS...AREAS OF WEST WINDS 20 TO 30 MPH WITH GUSTS TO 50 MPH. * VISIBILITY...REDUCED AT TIMES IN SNOW...BLOWING SNOW...AND FOG. * IMPACTS...TRAVELERS THROUGH THE MOUNTAINS SHOULD BE PREPARED FOR HAZARDOUS WINTER WEATHER CONDITIONS. MOTORISTS ARE URGED TO CHECK THE LATEST ROAD REPORTS BEFORE DEPARTING. ALWAYS CARRY CHAINS AND TAKE EXTRA FOOD AND CLOTHING IF YOU MUST TRAVEL INTO THE MOUNTAINS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MM
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 9, 3:51 AM PST | Winter Weather Advisory | SGX | Riverside, San Bernardino, San Diego | 30 hr |
| Nov 9, 11:04 AM PST | Gale Warning | SGX | 22 hr |
Nearby
Winter Storm Warnings in California, 2012Every winter storm warning in 2012
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.