Alert archive / California / Beach Hazards Statements in 2016
Beach Hazards Statement 23, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Dec 20, 2016, 1:19 PM PST for 6 counties in California. It took effect at Dec 21, 2016, 6:00 AM PST. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Dec 20, 2016, 1:19 PM PST (21:19 UTC)
- In effect from
- Dec 21, 2016, 6:00 AM PST
- Expired
- Dec 21, 2016, 6:00 PM PST
- In force
- 12 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 21:25 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 12:00Z, 9.3 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
- 2189 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -87 m²/s²
- 0-3 km storm-relative helicity
- -54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
864 WHUS46 KMTR 202119 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO CA 119 PM PST TUE DEC 20 2016 ...LONG PERIOD SWELL WILL IMPACT THE COAST WEDNESDAY... .AN ENERGETIC NORTHWESTERLY SWELL WILL PRODUCE HAZARDOUS CONDITIONS FOR THE CENTRAL CALIFORNIA COAST WEDNESDAY. CAZ006-505-509-529-530-210700- /O.NEW.KMTR.BH.S.0023.161221T1400Z-161222T0200Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY- SOUTHERN MONTEREY BAY AND BIG SUR COAST- 119 PM PST TUE DEC 20 2016 ...BEACH HAZARDS STATEMENT IN EFFECT FROM WEDNESDAY MORNING THROUGH WEDNESDAY AFTERNOON... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A BEACH HAZARDS STATEMENT FOR LARGE SHORE BREAK...RIP CURRENTS...AND SNEAKER WAVES...WHICH IS IN EFFECT FROM WEDNESDAY MORNING THROUGH WEDNESDAY AFTERNOON. * HAZARDS...LARGE SHORE BREAK...SNEAKER WAVES...RIP CURRENTS * TIMING...WEDNESDAY MORNING THROUGH WEDNESDAY AFTERNOON * LOCATION...COASTLINE FROM SONOMA COUNTY SOUTH THROUGH MONTEREY COUNTY. IN PARTICULAR WEST TO NORTHWEST FACING BEACHES...INCLUDING BUT NOT LIMITED TO...OCEAN BEACH...MONTARA STATE BEACH AND MARINA STATE BEACH. * POTENTIAL IMPACTS...MODERATE RISK OF LARGE SHORE BREAK AND SNEAKER WAVES WITH AN INCREASED THREAT OF RIP CURRENTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BEACH HAZARD STATEMENT FOR LARGE SHORE BREAK MEANS THAT CONDITIONS ARE PRESENT TO SUPPORT LARGE BREAKING WAVES IN SHALLOW WATER. THESE LARGE BREAKING WAVES CAN LEAD TO BACK AND NECK INJURIES. SWIMMERS SHOULD AVOID SWIMMING IN AREAS OF LARGE SHORE BREAK AND ALWAYS SWIM NEAR A LIFEGUARD. A BEACH HAZARD STATEMENT FOR SNEAKER WAVES MEANS THAT CONDITIONS ARE PRESENT TO SUPPORT A HEIGHTENED RISK OF UNSUSPECTING BEACH GOERS BEING SWEPT INTO THE SEA BY A WAVE. PEOPLE WALKING ALONG THE BEACH SHOULD NEVER TURN THEIR BACK TO THE SEA. FISHERMAN SHOULD AVOID FISHING FROM ROCKS OR JETTIES. A BEACH HAZARD STATEMENT FOR RIP CURRENTS MEANS THAT CONDITIONS ARE PRESENT TO SUPPORT A HEIGHTENED RISK OF STRONG RIP CURRENTS. RIP CURRENTS ARE TYPICALLY MORE FREQUENT AND STRONGER IN THE VICINITY OF JETTIES...INLETS...AND PIERS. SWIMMERS CAUGHT IN A RIP CURRENT SHOULD SWIM PARALLEL TO THE COAST TO ESCAPE THE RIP CURRENT BEFORE TRYING TO SWIM FOR SHORE. && $$
3 follow-up statements
145 WHUS46 KMTR 210537 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO CA 937 PM PST TUE DEC 20 2016 ...LONG PERIOD SWELL WILL IMPACT THE COAST WEDNESDAY... .AN ENERGETIC NORTHWESTERLY SWELL WILL PRODUCE HAZARDOUS CONDITIONS ALONG THE CALIFORNIA COAST WEDNESDAY. CAZ006-505-509-529-530-211900- /O.CON.KMTR.BH.S.0023.161221T1400Z-161222T0200Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY- SOUTHERN MONTEREY BAY AND BIG SUR COAST- 937 PM PST TUE DEC 20 2016 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 6 AM PST WEDNESDAY THROUGH WEDNESDAY AFTERNOON... * HAZARDS...LARGE SHORE BREAK...SNEAKER WAVES...RIP CURRENTS * TIMING...WEDNESDAY MORNING THROUGH WEDNESDAY AFTERNOON * LOCATION...COASTLINE FROM SONOMA COUNTY SOUTH THROUGH MONTEREY COUNTY. IN PARTICULAR WEST TO NORTHWEST FACING BEACHES... INCLUDING BUT NOT LIMITED TO...OCEAN BEACH...MONTARA STATE BEACH AND MARINA STATE BEACH. * POTENTIAL IMPACTS...MODERATE RISK OF LARGE SHORE BREAK AND SNEAKER WAVES WITH AN INCREASED THREAT OF RIP CURRENTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BEACH HAZARD STATEMENT FOR LARGE SHORE BREAK MEANS THAT CONDITIONS ARE PRESENT TO SUPPORT LARGE BREAKING WAVES IN SHALLOW WATER. THESE LARGE BREAKING WAVES CAN LEAD TO BACK AND NECK INJURIES. SWIMMERS SHOULD AVOID SWIMMING IN AREAS OF LARGE SHORE BREAK AND ALWAYS SWIM NEAR A LIFEGUARD. A BEACH HAZARD STATEMENT FOR SNEAKER WAVES MEANS THAT CONDITIONS ARE PRESENT TO SUPPORT A HEIGHTENED RISK OF UNSUSPECTING BEACH GOERS BEING SWEPT INTO THE SEA BY A WAVE. PEOPLE WALKING ALONG THE BEACH SHOULD NEVER TURN THEIR BACK TO THE SEA. FISHERMAN SHOULD AVOID FISHING FROM ROCKS OR JETTIES. A BEACH HAZARD STATEMENT FOR RIP CURRENTS MEANS THAT CONDITIONS ARE PRESENT TO SUPPORT A HEIGHTENED RISK OF STRONG RIP CURRENTS. RIP CURRENTS ARE TYPICALLY MORE FREQUENT AND STRONGER IN THE VICINITY OF JETTIES...INLETS...AND PIERS. SWIMMERS CAUGHT IN A RIP CURRENT SHOULD SWIM PARALLEL TO THE COAST TO ESCAPE THE RIP CURRENT BEFORE TRYING TO SWIM FOR SHORE. && $$
855 WHUS46 KMTR 211858 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO CA 1058 AM PST WED DEC 21 2016 ...LONG PERIOD SWELL WILL CONTINUE TO IMPACT THE COAST TODAY... .AN ENERGETIC NORTHWESTERLY SWELL WILL CONTINUE TO PRODUCE HAZARDOUS CONDITIONS ALONG THE CALIFORNIA COAST TODAY. CAZ006-505-509-529-530-220200- /O.CON.KMTR.BH.S.0023.000000T0000Z-161222T0200Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY- SOUTHERN MONTEREY BAY AND BIG SUR COAST- 1058 AM PST WED DEC 21 2016 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 6 PM PST THIS EVENING... * HAZARDS...LARGE SHORE BREAK...SNEAKER WAVES...RIP CURRENTS * TIMING...THROUGH THIS AFTERNOON * LOCATION...COASTLINE FROM SONOMA COUNTY SOUTH THROUGH MONTEREY COUNTY. IN PARTICULAR WEST TO NORTHWEST FACING BEACHES... INCLUDING BUT NOT LIMITED TO...OCEAN BEACH...MONTARA STATE BEACH AND MARINA STATE BEACH. * POTENTIAL IMPACTS...MODERATE RISK OF LARGE SHORE BREAK AND SNEAKER WAVES WITH AN INCREASED THREAT OF RIP CURRENTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BEACH HAZARD STATEMENT FOR LARGE SHORE BREAK MEANS THAT CONDITIONS ARE PRESENT TO SUPPORT LARGE BREAKING WAVES IN SHALLOW WATER. THESE LARGE BREAKING WAVES CAN LEAD TO BACK AND NECK INJURIES. SWIMMERS SHOULD AVOID SWIMMING IN AREAS OF LARGE SHORE BREAK AND ALWAYS SWIM NEAR A LIFEGUARD. A BEACH HAZARD STATEMENT FOR SNEAKER WAVES MEANS THAT CONDITIONS ARE PRESENT TO SUPPORT A HEIGHTENED RISK OF UNSUSPECTING BEACH GOERS BEING SWEPT INTO THE SEA BY A WAVE. PEOPLE WALKING ALONG THE BEACH SHOULD NEVER TURN THEIR BACK TO THE SEA. FISHERMAN SHOULD AVOID FISHING FROM ROCKS OR JETTIES. A BEACH HAZARD STATEMENT FOR RIP CURRENTS MEANS THAT CONDITIONS ARE PRESENT TO SUPPORT A HEIGHTENED RISK OF STRONG RIP CURRENTS. RIP CURRENTS ARE TYPICALLY MORE FREQUENT AND STRONGER IN THE VICINITY OF JETTIES...INLETS...AND PIERS. SWIMMERS CAUGHT IN A RIP CURRENT SHOULD SWIM PARALLEL TO THE COAST TO ESCAPE THE RIP CURRENT BEFORE TRYING TO SWIM FOR SHORE. && $$
697 WHUS46 KMTR 220225 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO CA 625 PM PST WED DEC 21 2016 CAZ006-505-509-529-530-220330- /O.EXP.KMTR.BH.S.0023.000000T0000Z-161222T0200Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY- SOUTHERN MONTEREY BAY AND BIG SUR COAST- 625 PM PST WED DEC 21 2016 ...BEACH HAZARDS STATEMENT HAS EXPIRED... SURF CONDITIONS HAVE BEGUN TO SUBSIDE THIS EVENING AND WILL CONTINUE A DOWNWARD TREND OVERNIGHT WHICH HAS ALLOWED FOR THE EXPIRATION OF THE BEACH HAZARD STATEMENT. DESPITE SUBSIDING CONDITIONS, THE OCEAN REMAINS A FORMIDABLE FORCE. RESPECT THE POWER OF THE OCEAN, ENJOY THE OCEAN FROM A SAFE DISTANCE, AND CALL FOR HELP IF YOU SEE A PERSON OR PET STRUGGLING IN THE SURF. NEVER TURN YOUR BACK ON THE OCEAN. && $$
Nearby
Beach Hazards Statements in California, 2016Every beach hazards statement in 2016
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.