Alert archive / California / Beach Hazards Statements in 2020
Beach Hazards Statement 3, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Jan 29, 2020, 1:10 PM PST for 6 counties in California. It took effect at Jan 30, 2020, 6:00 AM PST. It was in force for 26 hr.
The area
The counties it named.
The facts
- Issued
- Jan 29, 2020, 1:10 PM PST (21:10 UTC)
- In effect from
- Jan 30, 2020, 6:00 AM PST
- Expired
- Jan 31, 2020, 8:18 AM PST
- In force
- 26 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 21:13 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, 9.2 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
- 898 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
393 WHUS46 KMTR 292110 CCA CFWMTR Coastal Hazard Message...CORRECTED National Weather Service San Francisco CA 110 PM PST Wed Jan 29 2020 ...Increased Risk of Sneaker Waves, Rip Currents, and Large Shore Break Thursday Morning Through Friday Morning... .A long period northwest swell will begin to move into the waters early Thursday morning and impact the coast through Friday morning. The greatest risk for sneaker waves and rip currents along the coastline will occur on Thursday. Additionally, breaking wave heights of 17 to 22 feet will be possible at favored locations along the shore on Thursday. The swell will begin to decrease on Thursday night, but breaking waves heights up to 15 to 20 feet will remain possible through Friday morning. CAZ006-505-509-529-530-300700- /O.NEW.KMTR.BH.S.0003.200130T1400Z-200131T1900Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 110 PM PST Wed Jan 29 2020 ...BEACH HAZARDS STATEMENT IN EFFECT FROM 6 AM THURSDAY MORNING THROUGH 11 AM FRIDAY MORNING... * WHAT...Increased risk of sneaker waves, rip currents, and large shore break are expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...From Thursday morning through Friday morning. * IMPACTS...Rip currents can pull swimmers and surfers out to sea. Sneaker waves can knock unsuspecting beach goers over and into the sea. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water due to dangerous surf conditions, or stay near occupied lifeguard towers. Swimmers should avoid swimming in areas of large shore break. Rock jetties can be deadly in such conditions, stay off the rocks. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
6 follow-up statements
633 WHUS46 KMTR 292132 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 132 PM PST Wed Jan 29 2020 ...Increased Risk of Sneaker Waves, Rip Currents, and Large Shore Break Thursday Morning Through Friday Morning... .A long period northwest swell will begin to move into the waters early Thursday morning and impact the coast through Friday morning. The greatest risk for sneaker waves and rip currents along the coastline will occur on Thursday. Additionally, breaking wave heights of 17 to 22 feet will be possible at favored locations along the shore on Thursday. The swell will begin to decrease on Thursday night, but breaking waves heights up to 15 to 20 feet will remain possible through Friday morning. CAZ006-505-509-529-530-300700- /O.CON.KMTR.BH.S.0003.200130T1400Z-200131T1900Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 132 PM PST Wed Jan 29 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 6 AM THURSDAY MORNING THROUGH 11 AM FRIDAY MORNING... * WHAT...Increased risk of sneaker waves, rip currents, and large shore break are expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...From Thursday morning through Friday morning. * IMPACTS...Rip currents can pull swimmers and surfers out to sea. Sneaker waves can knock unsuspecting beach goers over and into the sea. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water due to dangerous surf conditions, or stay near occupied lifeguard towers. Swimmers should avoid swimming in areas of large shore break. Rock jetties can be deadly in such conditions, stay off the rocks. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
024 WHUS46 KMTR 300553 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 953 PM PST Wed Jan 29 2020 ...Increased Risk of Sneaker Waves, Rip Currents, and Large Shore Break Thursday Morning Through Friday Morning... .A long period northwest swell will begin to move into the waters early Thursday morning and impact the coast through Friday morning. The greatest risk for sneaker waves and rip currents along the coastline will occur on Thursday. Additionally, breaking wave heights of 17 to 22 feet will be possible at favored locations along the shore on Thursday. The swell will begin to decrease on Thursday night, but breaking waves heights up to 15 to 20 feet will remain possible through Friday morning. CAZ006-505-509-529-530-302200- /O.CON.KMTR.BH.S.0003.200130T1400Z-200131T1900Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 953 PM PST Wed Jan 29 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 6 AM PST THURSDAY THROUGH FRIDAY MORNING... * WHAT...Increased risk of sneaker waves, rip currents, and large shore break are expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...From Thursday morning through Friday morning. * IMPACTS...Rip currents can pull swimmers and surfers out to sea. Sneaker waves can knock unsuspecting beach goers over and into the sea. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water due to dangerous surf conditions, or stay near occupied lifeguard towers. Swimmers should avoid swimming in areas of large shore break. Rock jetties can be deadly in such conditions, stay off the rocks. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
117 WHUS46 KMTR 301838 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1038 AM PST Thu Jan 30 2020 ...Increased Risk of Sneaker Waves, Rip Currents, and Large Shore Break This Afternoon Through Friday Morning... .A long period northwest swell will move through the waters today and impact the coast into Friday morning. The greatest risk for sneaker waves, rip currents, and longshore currents along the coast will occur this afternoon through tonight. Additionally, breaking wave heights of 15 to 22 feet will be possible at favored locations along the shore. The swell will begin to decrease tonight, but breaking waves heights up to 12 to 20 feet will remain possible through Friday morning. CAZ006-505-509-529-530-310700- /O.CON.KMTR.BH.S.0003.000000T0000Z-200131T1900Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1038 AM PST Thu Jan 30 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH FRIDAY MORNING... * WHAT...Increased risk of sneaker waves, rip currents, long shore currents, and large shore break are expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...Now through Friday morning. * IMPACTS...Rip currents can pull swimmers and surfers out to sea. Sneaker waves can knock unsuspecting beach goers over and into the sea. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water due to dangerous surf conditions, or stay near occupied lifeguard towers. Swimmers should avoid swimming in areas of large shore break. Rock jetties can be deadly in such conditions, stay off the rocks. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. && $$
110 WHUS46 KMTR 310600 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1000 PM PST Thu Jan 30 2020 ...Increased Risk of Sneaker Waves, Rip Currents, and Large Shore Break Tonight Through 11 AM PST Friday Morning... .A long period northwest swell will move through the waters and impact the coast into Friday morning. The greatest risk for sneaker waves, rip currents, and longshore currents along the coast will occur this afternoon through tonight. Additionally, breaking wave heights of 15 to 22 feet will be possible at favored locations along the shore. The swell will begin to decrease tonight, but breaking waves heights up to 12 to 20 feet will remain possible through Friday morning. CAZ006-505-509-529-530-311400- /O.CON.KMTR.BH.S.0003.000000T0000Z-200131T1900Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1000 PM PST Thu Jan 30 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH 11 AM PST FRIDAY MORNING... * WHAT...Increased risk of sneaker waves, rip currents, long shore currents, and large shore break are expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...Now through 11 AM PST Friday morning. * IMPACTS...Rip currents can pull swimmers and surfers out to sea. Sneaker waves can knock unsuspecting beach goers over and into the sea. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
352 WHUS46 KMTR 311305 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 505 AM PST Fri Jan 31 2020 ...Increased Risk of Sneaker Waves, Rip Currents, and Large Shore Break Tonight Through 11 AM PST Friday Morning... .A long period northwest swell continues to move through the waters and impact the coast into this morning. Breaking wave heights of 12 to 20 feet will be possible late this morning. CAZ006-505-509-529-530-311900- /O.CON.KMTR.BH.S.0003.000000T0000Z-200131T1900Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 505 AM PST Fri Jan 31 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 11 AM PST THIS MORNING... * WHAT...Increased risk of sneaker waves, rip currents, long shore currents, and large shore break are expected. * WHERE...Coastal North Bay Including Point Reyes National Seashore, Southern Monterey Bay and Big Sur Coast, San Francisco Peninsula Coast, San Francisco and Northern Monterey Bay Counties. * WHEN...Until 11 AM PST this morning. * IMPACTS...Rip currents can pull swimmers and surfers out to sea. Sneaker waves can knock unsuspecting beach goers over and into the sea. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Beach Hazard Statement means the potentially dangerous conditions may exist on specific beaches. These hazards may include large shore break...strong rip currents...strong longshore currents and possibly sneaker waves. All of which could be life threatening. Be sure to always keep your eyes on the ocean. && $$
875 WHUS46 KMTR 311618 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 818 AM PST Fri Jan 31 2020 CAZ006-505-509-529-530-311730- /O.CAN.KMTR.BH.S.0003.000000T0000Z-200131T1900Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 818 AM PST Fri Jan 31 2020 ...BEACH HAZARDS STATEMENT IS CANCELLED... Wave heights and periods have fallen below thresholds for a hazardous beach conditions. $$
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 29, 8:59 AM PST | Small Craft Advisory | MTR | 49 hr |
Nearby
Beach Hazards Statements in California, 2020Every beach hazards statement in 2020
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.