Weather Alerts for Lake San Antonio in Monterey County

Issued by the National Weather Service

Hydrologic Outlook  HYDROLOGIC OUTLOOK   Hydrologic Outlook
LAKE SAN ANTONIO IN MONTEREY COUNTY

Areas Affected:
Coastal North Bay Including Point Reyes National Seashore - East Bay Hills and the Diablo Range - East Bay Interior Valleys - Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park - North Bay Interior Valleys - North Bay Mountains - Northern Monterey Bay - Northern Salinas Valley, Hollister Valley and Carmel Valley - San Francisco - San Francisco Bay Shoreline - San Francisco Peninsula Coast - Santa Clara Valley Including San Jose - Santa Cruz Mountains - Santa Lucia Mountains and Los Padres National Forest - Southern Monterey Bay and Big Sur Coast - Southern Salinas Valley, Arroyo Seco and Lake San Antonio
Effective: Fri, 1/22 2:33pm Updated: Sat, 1/23 2:00am Urgency: Future
Expires: Sat, 1/23 6:00am Severity: Unknown Certainty: Possible

 
Details:
...A SERIES OF STORMS WILL BRING PERIODS OF MODERATE TO HEAVY
RAINFALL TO THE REGION THROUGH THE MIDDLE OF NEXT WEEK
* WHAT... A series of strong Pacific storms is expected to bring
periods of moderate to heavy rain to the region. The first two
systems, today and Sunday will be on the cooler, weaker side and
will bring generally beneficial light to locally moderate
rainfall. A third stronger system arrives midweek next week and
will bring periods of heavy rainfall accumulation and periods of
potentially intense rain rates. This will likely result in an
increased risk of mudslides over steep terrain, debris flow over
wildfire burn areas, as well as localized ponding of water in
low-lying or poorly drained areas. Up to 3 inches of
precipitation is expected in urban areas, and 3-7 possible
over higher terrain.
* WHERE... Entire forecast area from Napa and Sonoma Counties
south through Monterey and San Benito Counties. Latest model
guidance suggests the coastal slopes of the Santa Cruz Mountains
and Big Sur look to be the primary target of the heaviest
precipitation.
* WHEN... Today through Thursday. The heaviest rainfall
accumulation and periods of potentially intense rain rates are
expected Tuesday evening in the North Bay, then spreading south
across the region overnight Tuesday and Wednesday.
* ADDITIONAL DETAILS... In addition to the heavy rainfall and
potentially intense rain rates, mud, rock, and debris flows
could occur in areas of steep terrain, including across recent
burn areas. In addition, strong gusty winds may cause drainage
blockages which could create a localized flooding threat,
especially in mountainous terrain. Localized ponding of water
in low- lying or poorly drained areas, such as freeway offramps.
No mainstem river flooding is forecast due to the dry
conditions so far this winter. Roadways will be extra slick
after the recent dry stretch. Temperatures will cool with and in
the wake of these storms and bring some very cold overnight
temperatures, lowering snow levels resulting in snow at higher
elevations. Details regarding the midweek storm will likely
change as the system nears. Therefore, stay tuned to the latest
forecast for the most up to date weather information. Confidence
is high that we will receive rainfall from the midweek system
however, confidence is low to moderate with respect to the
timing, location, and total rainfall accumulation and
intensities.