Alert archive / California / Beach Hazards Statements in 2018
Beach Hazards Statement 2, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Apr 12, 2018, 6:24 AM PDT for 6 counties in California. It took effect at Apr 13, 2018, 2:00 AM PDT. It was in force for 17 hr.
The area
The counties it named.
The facts
- Issued
- Apr 12, 2018, 6:24 AM PDT (13:24 UTC)
- In effect from
- Apr 13, 2018, 2:00 AM PDT
- Expired
- Apr 13, 2018, 7:00 PM PDT
- In force
- 17 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 13:25 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, 1.4 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
- 1115 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- -41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
127 WHUS46 KMTR 121324 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 624 AM PDT Thu Apr 12 2018 Northwesterly swell will increase tonight into tomorrow, peaking Friday morning. Swell is expected to decrease Friday afternoon/evening. CAZ006-505-509-529-530-122130- /O.NEW.KMTR.BH.S.0002.180413T0900Z-180414T0200Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 624 AM PDT Thu Apr 12 2018 ...BEACH HAZARDS STATEMENT IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY 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 Friday evening. * WAVES AND SURF...Northwest swell 10 to 12 feet with a period of 14 to 16 seconds. Breakers up to 20 feet possible. * TIMING...Late tonight through 7 PM PDT Friday evening. * LOCATION...West to northwest facing beaches along the Central Coast from Sonoma County through Monterey County...including but not limited to...Ocean Beach, Montara State Beach, and Marina State Beach. * POTENTIAL IMPACTS...Impacts include rip currents, sneaker waves, and large shore break. Never turn your back to the 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...and possibly sneaker waves. All of which could be life threatening. Be sure to always keep your eyes on the ocean. && $$
2 follow-up statements
247 WHUS46 KMTR 122114 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 214 PM PDT Thu Apr 12 2018 Northwesterly swell will increase tonight into tomorrow, peaking Friday morning. Swell is expected to decrease Friday afternoon/evening. CAZ006-505-509-529-530-131000- /O.CON.KMTR.BH.S.0002.180413T0900Z-180414T0200Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 214 PM PDT Thu Apr 12 2018 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 2 AM PDT FRIDAY THROUGH FRIDAY EVENING... * WAVES AND SURF...Northwest swell 10 to 12 feet with a period of 14 to 16 seconds. Breakers up to 20 feet possible. * TIMING...Late tonight through 7 PM PDT Friday evening. * LOCATION...West to northwest facing beaches along the Central Coast from Sonoma County through Monterey County...including but not limited to...Ocean Beach, Montara State Beach, and Marina State Beach. * POTENTIAL IMPACTS...Impacts include rip currents and large shore break. Never turn your back to the ocean! PRECAUTIONARY/PREPAREDNESS ACTIONS... A Beach Hazard Statement means the potentially dangerous conditions may exist on specific beaches. These hazards may include large shore break...strong rip currents. All of which could be life threatening. Be sure to always keep your eyes on the ocean. && $$
351 WHUS46 KMTR 130810 CFWMTR Coastal Hazard Message National Weather Service San Francisco Bay Area 110 AM PDT Fri Apr 13 2018 Northwesterly swell will increase this morning then decrease in the afternoon and evening. CAZ006-505-509-529-530-140200- /O.CON.KMTR.BH.S.0002.180413T0900Z-180414T0200Z/ 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 AM PDT Fri Apr 13 2018 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THIS EVENING... * WAVES AND SURF...Northwest swell 10 to 12 feet with a period of 14 to 16 seconds. Breakers up to 20 feet possible. * TIMING...Late tonight through 7 PM PDT this evening. * LOCATION...West to northwest facing beaches along the Central Coast from Sonoma County through Monterey County...including but not limited to...Ocean Beach, Montara State Beach, and Marina State Beach. * POTENTIAL IMPACTS...Impacts include rip currents and large shore break. Never turn your back to the 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. All of which could be life threatening. Be sure to always keep your eyes on the ocean. && $$
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 6:47 PM PDT | Special Weather Statement | MTR | San Mateo | 28 min |
| Apr 12, 2:16 AM PDT | Small Craft Advisory | MTR | 21 hr |
Nearby
Beach Hazards Statements in California, 2018Every beach hazards statement in 2018
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.