Alert archive / California / Heat Advisories in 2020
Heat Advisory 4, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this heat advisory at Aug 15, 2020, 12:00 AM PDT for 11 counties in California. It took effect at Aug 15, 2020, 10:00 AM PDT. It was in force for 59 hr.
The area
The counties it named.
The facts
- Issued
- Aug 15, 2020, 12:00 AM PDT (07:00 UTC)
- In effect from
- Aug 15, 2020, 10:00 AM PDT
- Expired
- Aug 17, 2020, 9:00 PM PDT
- In force
- 59 hr
- Issued by
- NWS San Francisco Bay Area, CA
Counties Alameda County, CA, City and County of San Francisco, CA, Contra Costa County, CA, Marin County, CA, Monterey County, CA, Napa County, CA, San Benito County, CA, San Mateo County, CA, Santa Clara County, CA, Santa Cruz County, CA, Sonoma County, CA
The radar
The San Francisco radar (KMUX), 46 km from the middle of the area, began a volume at 07:01 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.
What forecasters said that day
The local office's own words before this heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Francisco Bay Area, CA wrote its last area forecast discussion before this heat advisory went out at Aug 14, 10:37 PM PDT, 1 hour 23 minutes earlier.
Area forecast discussion, Aug 14, 10:37 PM PDT, 1 hour 23 minutes before
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</html>The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 2:19 AM PDT | Fire Weather Watch | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more | 8 hr |
| Aug 15, 10:27 AM PDT | Red Flag Warning | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more | 49 hr |
| Aug 15, 2:04 PM PDT | Small Craft Advisory | MTR | 8 days |
Nearby
Heat Advisories in California, 2020Every heat advisory 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; radar from the NEXRAD Level II archive.