Overview
A strong Pacific storm system is on track to impact the San Francisco/Monterey Bay Region Thursday night through late Friday night. Rains along the cold front will develop across the North Bay Thursday night and spread southward through Friday morning. Thus, light to moderate rainfall will likely wreak havoc on the Friday morning commute across the San Francisco Bay Area. As the main upper level system moves across, rain showers and the possibility of embedded thunderstorms will continue through Friday afternoon and evening region-wide. In addition, these conditions will likely impact any Halloween activities planned for Friday evening. |
CONFIDENCE
· High: Timing
of frontal passage and likelihood of precipitation
· Low to
Moderate: Thunderstorm potential & exact rainfall amounts
TIMING
& LOCATIONS
· Rains
developing Thursday Night across the North Bay
· Widespread
rains moving into the San Francisco Bay Area Friday
morning, likely impacting the morning rush hour commute
· Widespread
rains and showers developing across the Central Coast Friday
morning/early afternoon
· Thunderstorm
potential greatest during the afternoon and evening hours on Friday
IMPACTS
*Hazards:
· No watches/warnings/advisories
in effect at this time (click link for the latest information).
*Impact 1 (Rainfall) :
· Widespread rainfall
amounts of 0.25" to 0.50" can be expected across the major urban
areas and into the inland valleys
· Storm total rainfall
amounts of 0.50" to 1.00" likely in the coastal hills/mountains
· Isolated higher
rainfall totals will be possible within heavier shower & thunderstorm
activity
· Light to moderate
rain will result in difficult driving conditions with reduced visibility
and wet roadways, especially during rush hour commutes
*Impact 2 (Thunderstorms):
· Any thunderstorms
that do develop may produce brief heavy downpours and/or small hail
NWS will continue to
provide email updates as the forecast changes.
