Alert archive / California / High Surf Advisories in 2012
High Surf Advisory 13, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this high surf advisory at Dec 21, 2012, 2:51 AM PST for 6 counties in California. It took effect at Dec 21, 2012, 4:00 AM PST. It was in force for 34 hr.
The area
The counties it named.
The facts
- Issued
- Dec 21, 2012, 2:51 AM PST (10:51 UTC)
- In effect from
- Dec 21, 2012, 4:00 AM PST
- Expired
- Dec 22, 2012, 1:38 PM PST
- In force
- 34 hr
- Issued by
- NWS San Francisco Bay Area, CA
Counties City and County of San Francisco, CA, Marin County, CA, Monterey County, CA, San Mateo County, CA, Santa Cruz County, CA, Sonoma County, CA
The radar
The San Francisco radar (KMUX), 53 km from the middle of the area, began a volume at 10:50 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, 10.9 hours before the alert went out and 26 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
- 1303 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
875 WHUS46 KMTR 211051 CFWMTR URGENT - IMMEDIATE BROADCAST REQUESTED COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 251 AM PST FRI DEC 21 2012 ...A LARGE NORTHWESTERLY SWELL WILL IMPACT THE COAST TODAY... CAZ006-505-509-211900- /O.NEW.KMTR.SU.Y.0013.121221T1200Z-121223T0000Z/ SAN FRANCISCO- COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST- 251 AM PST FRI DEC 21 2012 ...HIGH SURF ADVISORY IN EFFECT UNTIL 4 PM PST SATURDAY... THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS ISSUED A HIGH SURF ADVISORY...WHICH IS IN EFFECT UNTIL 4 PM PST SATURDAY. * WAVES AND SURF...NW SWELL 16 TO 19 FT AT 17 SECONDS. SURF ZONE WILL BE CHOPPY WITH LARGE BREAKING WAVES AT DEEP WATER BREAKS. * TIMING...EARLY FRIDAY MORNING THROUGH SATURDAY AFTERNOON. * IMPACTS...THIS WILL NOT BE A GOOD SURFING DAY BUT DO EXPECT OCCASIONAL LARGE BREAKERS WITH EXCESSIVE RUN UP ONTO THE BEACHES. THIS RUN UP COULD RESULT BEACH GOERS BEING WASHED OFF OF THE BEACH AND INTO THE SEA. FISHERMEN SHOULD ALSO AVOID FISHING FROM ROCKS AND JETTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN THE ADVISORY AREA...PRODUCING RIP CURRENTS AND LOCALIZED BEACH EROSION. && $$ CAZ529-530-211900- /O.NEW.KMTR.SU.Y.0013.121221T1500Z-121223T0000Z/ NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST- 251 AM PST FRI DEC 21 2012 ...HIGH SURF ADVISORY IN EFFECT FROM 7 AM THIS MORNING TO 4 PM PST SATURDAY... THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS ISSUED A HIGH SURF ADVISORY...WHICH IS IN EFFECT FROM 7 AM THIS MORNING TO 4 PM PST SATURDAY. * WAVES AND SURF...NW SWELL 16 TO 19 FT AT 17 SECONDS. SURF ZONE WILL BE CHOPPY WITH LARGE BREAKING WAVES AT DEEP WATER BREAKS. * TIMING...FRIDAY MORNING THROUGH SATURDAY AFTERNOON. * IMPACTS...THIS WILL NOT BE A GOOD SURFING DAY BUT DO EXPECT OCCASIONAL LARGE BREAKERS WITH EXCESSIVE RUN UP ONTO THE BEACHES. THIS RUN UP COULD RESULT BEACH GOERS BEING WASHED OFF OF THE BEACH AND INTO THE SEA. FISHERMEN SHOULD ALSO AVOID FISHING FROM ROCKS AND JETTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN THE ADVISORY AREA...PRODUCING RIP CURRENTS AND LOCALIZED BEACH EROSION. && $$ HTTP://WWW.WEATHER.GOV/SANFRANCISCO
3 follow-up statements
333 WHUS46 KMTR 211821 CFWMTR URGENT - IMMEDIATE BROADCAST REQUESTED COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 1021 AM PST FRI DEC 21 2012 ...A LARGE NORTHWESTERLY SWELL WILL IMPACT THE COAST TODAY INTO SATURDAY... CAZ006-505-509-221300- /O.CON.KMTR.SU.Y.0013.000000T0000Z-121223T0000Z/ SAN FRANCISCO- COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST- 1021 AM PST FRI DEC 21 2012 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST SATURDAY... * WAVES AND SURF...NW SWELL 16 TO 19 FT AT 17 SECONDS. SURF ZONE WILL BE CHOPPY WITH LARGE BREAKING WAVES AT DEEP WATER BREAKS. * TIMING...THROUGH SATURDAY AFTERNOON. * IMPACTS...THIS WILL NOT BE A GOOD SURFING DAY BUT DO EXPECT OCCASIONAL LARGE BREAKERS WITH EXCESSIVE RUN UP ONTO THE BEACHES. THIS RUN UP COULD RESULT BEACH GOERS BEING WASHED OFF OF THE BEACH AND INTO THE SEA. FISHERMEN SHOULD ALSO AVOID FISHING FROM ROCKS AND JETTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN THE ADVISORY AREA...PRODUCING RIP CURRENTS AND LOCALIZED BEACH EROSION. && $$ CAZ529-530-221300- /O.CON.KMTR.SU.Y.0013.000000T0000Z-121223T0000Z/ NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST- 1021 AM PST FRI DEC 21 2012 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST SATURDAY... * WAVES AND SURF...NW SWELL 16 TO 19 FT AT 17 SECONDS. SURF ZONE WILL BE CHOPPY WITH LARGE BREAKING WAVES AT DEEP WATER BREAKS. * TIMING...THROUGH SATURDAY AFTERNOON. * IMPACTS...THIS WILL NOT BE A GOOD SURFING DAY BUT DO EXPECT OCCASIONAL LARGE BREAKERS WITH EXCESSIVE RUN UP ONTO THE BEACHES. THIS RUN UP COULD RESULT BEACH GOERS BEING WASHED OFF OF THE BEACH AND INTO THE SEA. FISHERMEN SHOULD ALSO AVOID FISHING FROM ROCKS AND JETTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN THE ADVISORY AREA...PRODUCING RIP CURRENTS AND LOCALIZED BEACH EROSION. && $$ HTTP://WWW.WEATHER.GOV/SANFRANCISCO
924 WHUS46 KMTR 221345 CFWMTR URGENT - IMMEDIATE BROADCAST REQUESTED COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 545 AM PST SAT DEC 22 2012 CAZ006-505-509-230000- /O.CON.KMTR.SU.Y.0013.000000T0000Z-121223T0000Z/ SAN FRANCISCO- COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST- 545 AM PST SAT DEC 22 2012 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... * WAVES AND SURF...NW SWELL 13 TO 16 FT AT 15 SECONDS. * TIMING...THROUGH THIS AFTERNOON. * IMPACTS...THIS WILL NOT BE A GOOD SURFING DAY BUT DO EXPECT OCCASIONAL LARGE BREAKERS WITH EXCESSIVE RUN UP ONTO THE BEACHES. THIS RUN UP COULD RESULT BEACH GOERS BEING WASHED OFF OF THE BEACH AND INTO THE SEA. FISHERMEN SHOULD ALSO AVOID FISHING FROM ROCKS AND JETTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN THE ADVISORY AREA...PRODUCING RIP CURRENTS AND LOCALIZED BEACH EROSION. && $$ CAZ529-530-230000- /O.CON.KMTR.SU.Y.0013.000000T0000Z-121223T0000Z/ NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST- 545 AM PST SAT DEC 22 2012 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... * WAVES AND SURF...NW SWELL 12 TO 15 FT AT 15 SECONDS. * TIMING...THROUGH THIS AFTERNOON. * IMPACTS...THIS WILL NOT BE A GOOD SURFING DAY BUT DO EXPECT OCCASIONAL LARGE BREAKERS WITH EXCESSIVE RUN UP ONTO THE BEACHES. THIS RUN UP COULD RESULT BEACH GOERS BEING WASHED OFF OF THE BEACH AND INTO THE SEA. FISHERMEN SHOULD ALSO AVOID FISHING FROM ROCKS AND JETTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN THE ADVISORY AREA...PRODUCING RIP CURRENTS AND LOCALIZED BEACH EROSION. && $$ HTTP://WWW.WEATHER.GOV/SANFRANCISCO
549 WHUS46 KMTR 222138 CFWMTR URGENT - IMMEDIATE BROADCAST REQUESTED COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 138 PM PST SAT DEC 22 2012 CAZ006-505-509-529-530-222245- /O.CAN.KMTR.SU.Y.0013.000000T0000Z-121223T0000Z/ SAN FRANCISCO- COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY- SOUTHERN MONTEREY BAY AND BIG SUR COAST- 138 PM PST SAT DEC 22 2012 ...HIGH SURF ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS CANCELLED THE HIGH SURF ADVISORY. NORTHWESTERLY SWELLS WILL CONTINUE TO SLOWLY SUBSIDE TODAY INTO THIS EVENING. $$ HTTP://WWW.WEATHER.GOV/SANFRANCISCO
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 21, 2:15 PM PST | Areal Flood Advisory | MTR | Marin, Napa, Sonoma | 3 hr |
Nearby
High Surf Advisories in California, 2012Every high surf advisory 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.