the total rain that is forecast to fall within the time period.
(aka Zulu, Z, or UTC) (see below)
Daylight Saving Time begins at 2 a.m. on the second Sunday in March and reverts to standard time at 2 a.m. on the first Sunday in November.
Images' source: National Weather Service
Page Managed by:
Hydrology Section
Contra Costa County Flood Control
and Water Conservation District
255 Glacier Drive
Martinez, CA 94553
(925) 313-2000
floodcontrol @ pw.cccounty.us
Standard Time (Fall/Winter) - Subtract 8 hours from the UTC time (00Z = 4:00PM PST day before and 12Z = 4:00AM PST same day)
Daylight Savings Time (Spring/Summer) - Subtract 7 hours from the UTC time (00Z = 5:00PM PST day before and 12Z = 5:00AM PST same day).
Please note the date and time for which the maps are valid (see text in lower left corner text block on maps).
The notation "12Z" means "12:00 Zulu Time" or noon Greenwich Mean Time (GMT) and "00Z" means "00:00 Zulu Time" or midnight GMT. Zulu time is also called "Universal Time Coordinated" (UTC), which is also the same as GMT.
For the Bay Area:
Daylight Saving Time begins at 2 a.m. on the second Sunday in March and reverts to standard time at 2 a.m. on the first Sunday in November.
Standard Time (Fall/Winter): Subtract 8 hours from the UTC time 00Z = 4:00PM PST day before and 12Z = 4:00AM PST same day
Daylight Savings Time (Spring/Summer):* Subtract 7 hours from the UTC time 00Z = 5:00PM PST day before and 12Z = 5:00AM PST same day. A conversion table for the Zulu or UTC can be found at Zulu Time Table.
* Note: In 2007, Daylight Savings time started and ended a month earlier.