Alert archive / California / Beach Hazards Statements in 2019
Beach Hazards Statement 9, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Dec 27, 2019, 8:15 AM PST for 6 counties in California. It was in force for 13 hr.
The area
The counties it named.
The facts
- Issued
- Dec 27, 2019, 8:15 AM PST (16:15 UTC)
- Expired
- Dec 27, 2019, 9:00 PM PST
- In force
- 13 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 16:16 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, 4.3 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
- 2101 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
034 WHUS46 KMTR 271615 CFWMTR COASTAL HAZARD MESSAGE National Weather Service SAN FRANCISCO CA 815 AM PST Fri Dec 27 2019 CAZ006-505-509-529-530-280500- /O.NEW.KMTR.BH.S.0009.191227T1615Z-191228T0500Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 815 AM PST Fri Dec 27 2019 ...BEACH HAZARDS STATEMENT IN EFFECT THROUGH THIS EVENING... * HAZARDS...Increased sneaker wave risk, increased risk of rip currents, large shore break. * TIMING...Remains in effect until 9 PM Friday. * LOCATION...Entire Pacific coastline from Sonoma south to Big Sur. * POTENTIAL IMPACTS...Larger surf at offshore breaks and an enhanced risk of sneaker waves on northwest California beaches. Steep beaches will have a higher risk of sneaker wave activity with greater wave run-up onto beaches. Large waves will also wash over jetties and rock outcroppings that may normally stay dry. 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 possible sneaker waves. All of which could be life threatening. An increased sneaker wave risk means that conditions are present to support a heightened risk of unsuspecting beach goers being swept into the sea by a wave. 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. Swimmers should avoid swimming in areas of large shore break and always swim near a lifeguard. Fisherman should avoid fishing from rocks or jetties. Be sure to always keep your eyes on the ocean. $$
Nearby
Beach Hazards Statements in California, 2019Every beach hazards statement in 2019
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.