Alert archive / California / Beach Hazards Statements in 2020
Beach Hazards Statement 7, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Apr 18, 2020, 9:07 PM PDT for 6 counties in California. It took effect at Apr 19, 2020, 11:00 PM PDT. It was in force for 24 hr.
The area
The counties it named.
The facts
- Issued
- Apr 18, 2020, 9:07 PM PDT (04:07 UTC)
- In effect from
- Apr 19, 2020, 11:00 PM PDT
- Expired
- Apr 20, 2020, 11:00 PM PDT
- In force
- 24 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 04:12 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 00:00Z, 4.1 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
- 1308 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- -49 m²/s²
- 0-3 km storm-relative helicity
- -4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
995 WHUS46 KMTR 190407 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 907 PM PDT Sat Apr 18 2020 ...Increasing risk of sneaker waves and strong rip currents from Coastal Sonoma County to Coastal Monterey County Sunday night... A long-period northwest swell will arrive along the beaches Sunday night and continue through Monday night. Swell period of 18 to 20 seconds will increase the risks for sneaker waves and rip currents. The ocean may seem relatively calm for periods of times with infrequent larger waves capable of knocking unsuspecting people into the ocean. People visiting the beaches should use extra caution when venturing into the ocean. CAZ006-505-509-529-530-200600- /O.NEW.KMTR.BH.S.0007.200420T0600Z-200421T0600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 907 PM PDT Sat Apr 18 2020 ...BEACH HAZARDS STATEMENT IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY EVENING... * WHAT...Increased risk of sneaker waves and rip currents 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 Sunday evening through Monday evening. * IMPACTS...Sneaker waves can knock unsuspecting beach goers over and into the sea. Rip currents can pull swimmers and surfers out to sea. * ADDITIONAL DETAILS...Please check with your local authorities on potential beach closures. Steep beaches will have a higher risk of sneaker wave and rip current activity with greater wave run- p onto beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
4 follow-up statements
631 WHUS46 KMTR 200331 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 831 PM PDT Sun Apr 19 2020 ...Increasing risk of sneaker waves and strong rip currents from Coastal Sonoma County to Coastal Monterey County tonight through Monday night... A long-period northwest swell will arrive along the beaches tonight and continue through Monday night. Swell period of 18 to 20 seconds will increase the risks for sneaker waves and rip currents. The ocean may seem relatively calm for periods of times with infrequent larger waves capable of knocking unsuspecting people into the ocean. People visiting the beaches should use extra caution when venturing near or into the ocean. CAZ006-505-509-529-530-201600- /O.CON.KMTR.BH.S.0007.200420T0600Z-200421T0600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 831 PM PDT Sun Apr 19 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH MONDAY EVENING... * WHAT...Increased risk of sneaker waves and rip currents expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...From this evening through Monday evening. * IMPACTS...Sneaker waves can knock unsuspecting beach goers over and into the sea. Rip currents can pull swimmers and surfers out to sea. * ADDITIONAL DETAILS...Please check with your local authorities on potential beach closures. Steep beaches will have a higher risk of sneaker wave and rip current activity with greater wave run- p onto beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
987 WHUS46 KMTR 201309 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 609 AM PDT Mon Apr 20 2020 ...Increasing risk of sneaker waves and strong rip currents from Coastal Sonoma County to Coastal Monterey County through Monday night... A long-period northwest swell will continue to move across the coastal waters today and through tonight. Swell period of 17 to 19 seconds will increase the risks for sneaker waves and rip currents. The ocean may seem relatively calm for periods of times with infrequent larger waves capable of knocking unsuspecting people into the ocean. People visiting the beaches should use extra caution when venturing near or into the ocean. CAZ006-505-509-529-530-210600- /O.CON.KMTR.BH.S.0007.000000T0000Z-200421T0600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 609 AM PDT Mon Apr 20 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THIS EVENING... * WHAT...Increased risk of sneaker waves and rip currents 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...Through this evening. * IMPACTS...Sneaker waves can knock unsuspecting beach goers over and into the sea. Rip currents can pull swimmers and surfers out to sea. * ADDITIONAL DETAILS...Please check with your local authorities on potential beach closures. Steep beaches will have a higher risk of sneaker wave and rip current activity with greater wave run up onto beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
685 WHUS46 KMTR 202147 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 247 PM PDT Mon Apr 20 2020 ...Increasing risk of sneaker waves and strong rip currents from Coastal Sonoma County to Coastal Monterey County through Monday night... A long-period northwest swell will continue to move across the coastal waters today and through tonight. Swell period of 17 to 19 seconds will increase the risks for sneaker waves and rip currents. The ocean may seem relatively calm for periods of times with infrequent larger waves capable of knocking unsuspecting people into the ocean. People visiting the beaches should use extra caution when venturing near or into the ocean. CAZ006-505-509-529-530-210600- /O.CON.KMTR.BH.S.0007.000000T0000Z-200421T0600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 247 PM PDT Mon Apr 20 2020 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING... * WHAT...Increased risk of sneaker waves and rip currents expected. * WHERE...Coastal North Bay Including Point Reyes National Seashore, Southern Monterey Bay and Big Sur Coast, San Francisco Peninsula Coast, San Francisco and Northern Monterey Bay Counties. * WHEN...Through this evening. * IMPACTS...Sneaker waves can knock unsuspecting beach goers over and into the sea. Rip currents can pull swimmers and surfers out to sea. * ADDITIONAL DETAILS...Please check with your local authorities on potential beach closures. Steep beaches will have a higher risk of sneaker wave and rip current activity with greater wave run up onto beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
173 WHUS46 KMTR 210545 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1045 PM PDT Mon Apr 20 2020 CAZ006-505-509-529-530-210645- /O.EXP.KMTR.BH.S.0007.000000T0000Z-200421T0600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1045 PM PDT Mon Apr 20 2020 ...BEACH HAZARDS STATEMENT WILL EXPIRE AT 11 PM PDT THIS EVENING... Long period northwest swell will continue to decrease tonight and Tuesday. The Beach Hazards Statement will be allowed to expire at 11 pm this evening. $$
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 2:52 AM PDT | Small Craft Advisory | MTR | 19 days |
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.