Special weather statement in effect for:
Heavy rain for the Central Interior, Cariboo-Chilcotin, Thompson and Columbia regions though Thursday evening.
Moist easterly flow associated with a deep Alberta low will stream moisture across the Rocky Mountains and into B.C. tonight and Thursday.
Computer guidance continues to suggest that 25 to 40 mm total rainfall will fall through Thursday night. Higher rainfall amounts are expected over the mountains, especially over the Williston, McGregor, and Cariboo regions where storm totals will reach 50 to 70 mm. In addition to the widespread synoptic rain, thunderstorms will have the potential of adding 15-25 mm locally over short periods.
Although the rainfall amounts may not be exceptionally heavy, the significance of this event is due to the potential for rising rivers levels. There is significant concern for high flows in the Quesnel River (Cariboo Mountains), the North Thompson (Blue River/Clearwater region), and South Thompson (Shuswap).
On Thursday the precipitation will become more showery in nature, but thunderstorms will cause significant local contribution to rainfall totals well into Thursday evening.
Rainfall warnings may be issued as the system further develops and confidence in rainfall amounts increases.