Alert archive / California / Beach Hazards Statements in 2017
Beach Hazards Statement 8, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Sep 18, 2017, 2:06 PM PDT for 6 counties in California. It took effect at Sep 19, 2017, 5:00 AM PDT. It was in force for 40 hr.
The area
The counties it named.
The facts
- Issued
- Sep 18, 2017, 2:06 PM PDT (21:06 UTC)
- In effect from
- Sep 19, 2017, 5:00 AM PDT
- Expired
- Sep 20, 2017, 9:00 PM PDT
- In force
- 40 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 21:12 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, 9.1 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
- 731 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- -15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
263 WHUS46 KMTR 182106 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 206 PM PDT MON SEP 18 2017 CAZ006-505-509-529-530-191400- /O.NEW.KMTR.BH.S.0008.170919T1200Z-170922T0300Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY- SOUTHERN MONTEREY BAY AND BIG SUR COAST- 206 PM PDT MON SEP 18 2017 ...BEACH HAZARDS STATEMENT IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY EVENING... A MODERATE TO LARGE HEIGHT, LONG PERIOD NORTHWEST SWELL WILL BEGIN TO ARRIVE OVERNIGHT TONIGHT. FORERUNNERS WITH PERIODS OF 16 TO 18 SECONDS ARE EXPECTED BEFORE THE MAIN WAVE ENERGY BEGINS TO ARRIVE DURING THE DAY TOMORROW WHICH WILL INCREASE THS RISK OF RIP CURRENTS, SNEAKER WAVES, AND LARGE SHORE BREAK AT NORTHWEST FACING BEACHES. THE WAVE TRAIN WILL PERSIST THROUGH MID WEEK BEFORE DISSIPATING. THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A BEACH HAZARDS STATEMENT FOR RIP CURRENTS, SNEAKER WAVES, AND LARGE SHORE BREAK, WHICH IS IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY EVENING. * SEAS: NORTHWEST FORERUNNERS ARRIVE INITIALLY TONIGHT WITH A PERIOD OF 16 TO 18 SECONDS. NORTHWEST SWELL OF 6 TO 10 FEET THEN POSSIBLE WITH A PERIOD OF 12 TO 16 SECONDS. SEAS WILL BEGIN LARGER THEN DISSIPATE THROUGH MID WEEK. * TIMING: 5AM TUESDAY MORNING THROUGH 8PM THURSDAY EVENING. * 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: INCREASED RISK OF RIP CURRENTS... SNEAKER WAVES... AND LOCALLY LARGE SHORE BREAK. BEACHGOERS MAY BE KNOCKED OVER... INJURED... OR PULLED OUT TO SEA INTO THE COLD RESTLESS OCEAN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BEACH HAZARD STATEMENT MEANS THE POTENTIALLY DANGEROUS CONDITIONS MAY EXIST ON SPECIFIC BEACHES. THESE HAZARDS MAY INCLUDE LARGE SHORE BREAK...STRONG RIP CURRENTS...STRONG LONGSHORE CURRENTS AND POSSIBLY SNEAKER WAVES. ALL OF WHICH COULD BE LIFE THREATENING. BE SURE TO ALWAYS KEEP YOUR EYES ON THE OCEAN. && $$
6 follow-up statements
483 WHUS46 KMTR 190403 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 903 PM PDT MON SEP 18 2017 CAZ006-505-509-529-530-191400- /O.CON.KMTR.BH.S.0008.170919T1200Z-170922T0300Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY- SOUTHERN MONTEREY BAY AND BIG SUR COAST- 903 PM PDT MON SEP 18 2017 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 5 AM PDT TUESDAY THROUGH THURSDAY EVENING... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A BEACH HAZARDS STATEMENT FOR RIP CURRENTS, SNEAKER WAVES, AND LARGE SHORE BREAK, WHICH IS IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY EVENING. * SEAS: NORTHWEST FORERUNNERS ARRIVE INITIALLY TONIGHT WITH A PERIOD OF 16 TO 18 SECONDS. NORTHWEST SWELL OF 6 TO 10 FEET THEN POSSIBLE WITH A PERIOD OF 12 TO 16 SECONDS. SEAS WILL BEGIN LARGER THEN DISSIPATE THROUGH MID WEEK. * TIMING: 5AM TUESDAY MORNING THROUGH 8PM THURSDAY EVENING. * LOCATION: COASTLINE FROM SONOMA COUNTY SOUTH THROUGH MONTEREY COUNTY. IN PARTICULAR WEST TO NORTHWEST FACING BEACHES... INCLUDING BUT NOT LIMITED TO...OCEAN BEACH...MONTARA STATE BEACH AND MARINA STATE BEACH. * POTENTIAL IMPACTS: INCREASED RISK OF RIP CURRENTS... SNEAKER WAVES... AND LOCALLY LARGE SHORE BREAK. BEACHGOERS MAY BE KNOCKED OVER... INJURED... OR PULLED OUT TO SEA INTO THE COLD RESTLESS OCEAN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BEACH HAZARD STATEMENT MEANS THE POTENTIALLY DANGEROUS CONDITIONS MAY EXIST ON SPECIFIC BEACHES. THESE HAZARDS MAY INCLUDE LARGE SHORE BREAK...STRONG RIP CURRENTS...STRONG LONGSHORE CURRENTS AND POSSIBLY SNEAKER WAVES. ALL OF WHICH COULD BE LIFE THREATENING. BE SURE TO ALWAYS KEEP YOUR EYES ON THE OCEAN. && $$
850 WHUS46 KMTR 191342 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 642 AM PDT TUE SEP 19 2017 CAZ006-505-509-529-530-192200- /O.CON.KMTR.BH.S.0008.000000T0000Z-170922T0300Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY- SOUTHERN MONTEREY BAY AND BIG SUR COAST- 642 AM PDT TUE SEP 19 2017 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THURSDAY EVENING... * SEAS: NORTHWEST FORERUNNERS ARRIVE BY MID MORNING TODAY WITH A PERIOD OF 16 TO 18 SECONDS. NORTHWEST SWELL OF 6 TO 10 FEET THEN POSSIBLE WITH A PERIOD OF 12 TO 16 SECONDS. SEAS WILL BEGIN LARGER THEN DISSIPATE THROUGH MID WEEK. * TIMING: 5AM TUESDAY MORNING THROUGH 8PM THURSDAY EVENING. * 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: INCREASED RISK OF RIP CURRENTS... SNEAKER WAVES... AND LOCALLY LARGE SHORE BREAK. BEACHGOERS MAY BE KNOCKED OVER... INJURED... OR PULLED OUT TO SEA INTO THE COLD RESTLESS OCEAN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BEACH HAZARD STATEMENT MEANS THE POTENTIALLY DANGEROUS CONDITIONS MAY EXIST ON SPECIFIC BEACHES. THESE HAZARDS MAY INCLUDE LARGE SHORE BREAK...STRONG RIP CURRENTS...STRONG LONGSHORE CURRENTS AND POSSIBLY SNEAKER WAVES. ALL OF WHICH COULD BE LIFE THREATENING. BE SURE TO ALWAYS KEEP YOUR EYES ON THE OCEAN. && $$
520 WHUS46 KMTR 192053 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 153 PM PDT TUE SEP 19 2017 CAZ006-505-509-529-530-201400- /O.CON.KMTR.BH.S.0008.000000T0000Z-170922T0300Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY- SOUTHERN MONTEREY BAY AND BIG SUR COAST- 153 PM PDT TUE SEP 19 2017 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THURSDAY EVENING... * SEAS: NORTHWEST FORERUNNERS WITH A PERIOD OF 16 TO 18 SECONDS ARE ARRIVING THROUGH TUESDAY AFTERNOON. NORTHWEST SWELL OF 6 TO 10 FEET THEN POSSIBLE WITH A PERIOD OF 12 TO 16 SECONDS. THE LARGEST WAVE TRAINS ARE EXPECTED TUESDAY NIGHT THROUGH WEDNESDAY. SEAS WILL DISSIPATE INTO THURSDAY. * TIMING: NOW THROUGH 8PM THURSDAY EVENING. * LOCATION: COASTLINE FROM SONOMA COUNTY SOUTH THROUGH MONTEREY COUNTY. IN PARTICULAR WEST TO NORTHWEST FACING BEACHES... INCLUDING BUT NOT LIMITED TO...OCEAN BEACH...MONTARA STATE BEACH...ASILOMAR BEACH... AND MARINA STATE BEACH. * POTENTIAL IMPACTS: INCREASED RISK OF RIP CURRENTS... SNEAKER WAVES... AND LOCALLY LARGE SHORE BREAK. BEACHGOERS MAY BE KNOCKED OVER... INJURED... OR PULLED OUT TO SEA INTO THE COLD RESTLESS OCEAN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BEACH HAZARD STATEMENT MEANS THE POTENTIALLY DANGEROUS CONDITIONS MAY EXIST ON SPECIFIC BEACHES. THESE HAZARDS MAY INCLUDE LARGE SHORE BREAK...STRONG RIP CURRENTS...STRONG LONGSHORE CURRENTS AND POSSIBLY SNEAKER WAVES. ALL OF WHICH COULD BE LIFE THREATENING. BE SURE TO ALWAYS KEEP YOUR EYES ON THE OCEAN. && $$
544 WHUS46 KMTR 201358 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 658 AM PDT WED SEP 20 2017 CAZ006-505-509-529-530-202200- /O.CON.KMTR.BH.S.0008.000000T0000Z-170922T0300Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY- SOUTHERN MONTEREY BAY AND BIG SUR COAST- 658 AM PDT WED SEP 20 2017 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THURSDAY EVENING... * SEAS: NORTHWEST SWELL WITH A PERIOD OF 13 TO 15 SECONDS WILL CONTINUE THROUGH THIS AFTERNOON. SWELL OF 6 TO 10 FEET THEN POSSIBLE WITH A PERIOD OF 12 TO 14 SECONDS. SEAS ARE EXPECTED TO DISSIPATE THURSDAY EVENING. * TIMING: NOW THROUGH 8PM THURSDAY EVENING. * 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...ASILOMAR BEACH... AND MARINA STATE BEACH. * POTENTIAL IMPACTS: INCREASED RISK OF RIP CURRENTS... SNEAKER WAVES... AND LOCALLY LARGE SHORE BREAK. BEACHGOERS MAY BE KNOCKED OVER... INJURED... OR PULLED OUT TO SEA INTO THE COLD RESTLESS OCEAN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BEACH HAZARD STATEMENT MEANS THE POTENTIALLY DANGEROUS CONDITIONS MAY EXIST ON SPECIFIC BEACHES. THESE HAZARDS MAY INCLUDE LARGE SHORE BREAK...STRONG RIP CURRENTS...STRONG LONGSHORE CURRENTS AND POSSIBLY SNEAKER WAVES. ALL OF WHICH COULD BE LIFE THREATENING. BE SURE TO ALWAYS KEEP YOUR EYES ON THE OCEAN. && $$
929 WHUS46 KMTR 202021 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 121 PM PDT WED SEP 20 2017 CAZ006-505-509-529-530-210400- /O.EXT.KMTR.BH.S.0008.000000T0000Z-170921T0400Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY- SOUTHERN MONTEREY BAY AND BIG SUR COAST- 121 PM PDT WED SEP 20 2017 ...BEACH HAZARDS STATEMENT WILL NOW EXPIRE AT UNTIL 9 PM PDT THIS EVENING... * SEAS: NORTHWEST SWELL OF 6 TO 10 FT WITH A PERIOD OF 12 TO 14 SECONDS THIS AFTERNOON...DECREASING TO 4 TO 8 FT WITH A PERIOD OF 10 TO 12 SECONDS THIS EVENING. * TIMING: THROUGH 9 PM PDT WEDNESDAY EVENING. * LOCATION: COASTLINE FROM SONOMA COUNTY SOUTH THROUGH MONTEREY COUNTY. IN PARTICULAR WEST TO NORTHWEST FACING BEACHES... INCLUDING BUT NOT LIMITED TO...OCEAN BEACH...MONTARA STATE BEACH...ASILOMAR BEACH...AND MARINA STATE BEACH. * POTENTIAL IMPACTS: INCREASED RISK OF RIP CURRENTS...SNEAKER WAVES...AND LOCALLY LARGE SHORE BREAK. BEACHGOERS MAY BE KNOCKED OVER...INJURED...OR PULLED OUT TO SEA INTO THE COLD RESTLESS OCEAN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BEACH HAZARD STATEMENT MEANS THE POTENTIALLY DANGEROUS CONDITIONS MAY EXIST ON SPECIFIC BEACHES. THESE HAZARDS MAY INCLUDE LARGE SHORE BREAK...STRONG RIP CURRENTS...STRONG LONGSHORE CURRENTS AND POSSIBLY SNEAKER WAVES. ALL OF WHICH COULD BE LIFE THREATENING. BE SURE TO ALWAYS KEEP YOUR EYES ON THE OCEAN. && $$
618 WHUS46 KMTR 210404 CFWMTR COASTAL HAZARD MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 904 PM PDT WED SEP 20 2017 CAZ006-505-509-529-530-210515- /O.EXP.KMTR.BH.S.0008.000000T0000Z-170921T0400Z/ SAN FRANCISCO- COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY- SOUTHERN MONTEREY BAY AND BIG SUR COAST- 904 PM PDT WED SEP 20 2017 ...BEACH HAZARDS STATEMENT HAS EXPIRED... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ALLOWED THE BEACH HAZARDS STATEMENT TO EXPIRE. CONDITIONS HAVE IMPROVED THEREFORE THE BEACH HAZARDS STATEMENT WAS ALLOWED TO EXPIRE. $$
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 17, 9:12 PM PDT | Small Craft Advisory | MTR | 108 min | |
| Sep 17, 9:12 PM PDT | Small Craft Advisory | MTR | 3 days | |
| Sep 18, 2:26 AM PDT | Small Craft Advisory | MTR | 49 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.