Alert archive / California / Beach Hazards Statements in 2017
Beach Hazards Statement 2, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Feb 25, 2017, 2:21 PM PST for 5 counties in California. It took effect at Feb 26, 2017, 3:00 AM PST. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Feb 25, 2017, 2:21 PM PST (22:21 UTC)
- In effect from
- Feb 26, 2017, 3:00 AM PST
- Expired
- Feb 26, 2017, 11:33 AM PST
- In force
- 9 hr
- Issued by
- NWS San Francisco Bay Area, CA
Counties City and County of San Francisco, CA, Marin County, CA, San Mateo County, CA, Santa Cruz County, CA, Sonoma County, CA
The radar
The San Francisco radar (KMUX), 86 km from the middle of the area, began a volume at 22:25 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, 10.4 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
- 895 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
500 WHUS46 KMTR 252221 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 221 PM PST SAT FEB 25 2017 ...LONG PERIOD SWELL BRINGS THREAT OF SNEAKER WAVES... .A LONG PERIOD SWELL ARRIVING SUNDAY MORNING WILL BRING MODERATE RISK OF SNEAKER WAVES TO NORTH BAY AND BAY AREA COASTAL BEACHES. ARRIVAL OF THE LONG PERIOD SWELL WILL COINCIDE WITH RAPIDLY RISING TIDE ON SUNDAY MORNING. WEST FACING AND STEEP SLOPED BEACHES WILL BE AT GREATEST RISK. THE THREAT SHOULD ABATE IN THE AFTERNOON AS THE TIDE DROPS AND AS THE LONG PERIOD TRANSITIONS TO A SHORTER PERIOD. CAZ006-505-509-260630- /O.NEW.KMTR.BH.S.0002.170226T1100Z-170227T0400Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST- 221 PM PST SAT FEB 25 2017 ...BEACH HAZARDS STATEMENT IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY EVENING... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A BEACH HAZARDS STATEMENT FOR SNEAKER WAVES, WHICH IS IN EFFECT FROM EARLY SUNDAY MORNING THROUGH SUNDAY EVENING. * HAZARDS...SNEAKER WAVES. * TIMING...EARLY SUNDAY MORNING THROUGH SUNDAY EVENING. PEAK THREAT WILL BE MID TO LATE SUNDAY MORNING. * LOCATION...WEST FACING BEACHES FROM ANO NUEVO NORTHWARD. * POTENTIAL IMPACTS...PEOPLE BEING PULLING INTO A COLD TURBULENT OCEAN...UNWILLINGLY. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 OCEAN. FISHERMAN SHOULD AVOID FISHING FROM ROCKS OR JETTIES. && $$
3 follow-up statements
298 WHUS46 KMTR 252232 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 232 PM PST SAT FEB 25 2017 ...LONG PERIOD SWELL BRINGS THREAT OF SNEAKER WAVES SUNDAY MORNING... .A LONG PERIOD SWELL ARRIVING SUNDAY MORNING, ALONG WITH FAIR WEATHER AND LIGHT MORNING WINDS, WILL BRING A MODERATE RISK OF SNEAKER WAVES TO NORTH BAY AND BAY AREA COASTAL BEACHES. ARRIVAL OF THE LONG PERIOD SWELL WILL COINCIDE WITH A RAPIDLY RISING TIDE ON SUNDAY MORNING, PUSHING MORE ENERGY UP THE BEACH. WEST AND NORTHWEST FACING AND STEEP SLOPED BEACHES WILL BE AT GREATEST RISK. THE THREAT IS EXPECTED TO ABATE IN THE AFTERNOON AS THE TIDE DROPS, ONSHORE WINDS DEVELOP, AND LONG PERIOD WAVES TRANSITION TO SHORTER PERIODS. CAZ006-505-509-260645- /O.EXT.KMTR.BH.S.0002.170226T1100Z-170226T2300Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST- 232 PM PST SAT FEB 25 2017 ...BEACH HAZARDS STATEMENT NOW IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... * HAZARDS...SNEAKER WAVES. * TIMING...EARLY SUNDAY MORNING THROUGH SUNDAY EVENING. PEAK THREAT WILL BE MID TO LATE SUNDAY MORNING. * LOCATION...WEST FACING BEACHES FROM ANO NUEVO NORTHWARD. * POTENTIAL IMPACTS...PEOPLE BEING PULLING INTO A COLD TURBULENT OCEAN...UNWILLINGLY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BEACH HAZARD STATEMENT FOR SNEAKER WAVES MEANS THAT CONDITIONS ARE PRESENT TO SUPPORT A HEIGHTENED RISK OF UNSUSPECTING BEACH GOERS BEING SWEPT INTO THE SEA BY A WAVE. PEOPLE WALKING ALONG THE BEACH SHOULD NEVER TURN THEIR BACK TO THE OCEAN. FISHERMAN SHOULD AVOID FISHING FROM ROCKS OR JETTIES. && $$
895 WHUS46 KMTR 260439 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 839 PM PST SAT FEB 25 2017 ...LONG PERIOD SWELL BRINGS THREAT OF SNEAKER WAVES SUNDAY MORNING... .A LONG PERIOD SWELL ARRIVING SUNDAY MORNING, ALONG WITH FAIR WEATHER AND LIGHT MORNING WINDS, WILL BRING A MODERATE RISK OF SNEAKER WAVES TO NORTH BAY AND BAY AREA COASTAL BEACHES. ARRIVAL OF THE LONG PERIOD SWELL WILL COINCIDE WITH A RAPIDLY RISING TIDE ON SUNDAY MORNING, PUSHING MORE ENERGY UP THE BEACH. WEST AND NORTHWEST FACING AND STEEP SLOPED BEACHES WILL BE AT GREATEST RISK. THE THREAT IS EXPECTED TO ABATE IN THE AFTERNOON AS THE TIDE DROPS, ONSHORE WINDS DEVELOP, AND LONG PERIOD WAVES TRANSITION TO SHORTER PERIODS. CAZ006-505-509-261700- /O.CON.KMTR.BH.S.0002.170226T1100Z-170226T2300Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST- 839 PM PST SAT FEB 25 2017 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 3 AM PST SUNDAY THROUGH SUNDAY AFTERNOON... * HAZARDS...SNEAKER WAVES. * TIMING...EARLY SUNDAY MORNING THROUGH SUNDAY EVENING. PEAK THREAT WILL BE MID TO LATE SUNDAY MORNING. * LOCATION...WEST FACING BEACHES FROM ANO NUEVO NORTHWARD. * POTENTIAL IMPACTS...PEOPLE BEING PULLING INTO A COLD TURBULENT OCEAN...UNWILLINGLY. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 OCEAN. FISHERMAN SHOULD AVOID FISHING FROM ROCKS OR JETTIES. && $$
645 WHUS46 KMTR 261933 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 1133 AM PST SUN FEB 26 2017 CAZ006-505-509-262045- /O.CAN.KMTR.BH.S.0002.000000T0000Z-170226T2300Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST- 1133 AM PST SUN FEB 26 2017 ...BEACH HAZARDS STATEMENT IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS CANCELLED THE BEACH HAZARDS STATEMENT. $$
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 25, 9:07 AM PST | Small Craft Advisory | MTR | 12 hr |
Nearby
Beach Hazards Statements in California, 2017Every beach hazards statement in 2017
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.