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FNUS86 KMTR 271223

FWLMTR



ECCDA Discussions

National Weather Service SAN FRANCISCO BAY AREA

523 AM PDT Tue May 27 2025



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##            Discussions from the latest FWF below                ##

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...Discussion from SFOFWFMTR...



Night and morning marine layer will impact the coast and locally

inland through Wednesday. Otherwise, mild and  dry conditions

persist through Wednesday with breezy winds each  afternoon and

evening. Building high pressure will bring a marked warming and

drying trend Thursday through Saturday. Triple digit heat will

impact the interior with daytime humidity reaching critical values.

Overnight humidity will be moderate to locally poor over the higher

terrain. Cooler and more moist conditions return late this weekend.





...Discussion from SFOFWFEKA...



High pressure builds back in today, ushering in a  warming a drying

trend. There is a low chance (10% or less) for  showers and

thunderstorms in Trinity County Wednesday afternoon.  Minimum RHs of

teens and 20s with good overnight are forecast for  the week in

eastern Trinity, eastern Mendocino, and Lake Counties. Much warmer

and drier weather forecast late week into the  weekend, with

temperatures in the triple digits possible and min  RHs of teens and

20s spreading into central Mendocino, most of  Trinity, and eastern

Humboldt and Del Norte counties. RH  recoveries also worsen this

weekend, with max RHs of 20s and 30s  possible in eastern Trinity,

Mendocino, and Lake. Breezy onshore  winds are possible Saturday.





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##       Complete a discussion for each ECCDA segment below        ##

##      When done click transmit, product sent as KMTRFWLMTR       ##

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ECC010-280030-

St Helena ECC Dispatch-

DISCUSSION FOR Marin and Sonoma and Napa Counties

523 AM PDT Tue May 27 2025



Night and morning marine layer will impact the coast and locally

inland through Wednesday. Otherwise, mild and  dry conditions

persist through Wednesday with breezy winds each  afternoon and

evening. Building high pressure will bring a marked warming and

drying trend Thursday through Saturday. Triple digit heat will

impact the interior with daytime humidity reaching critical values.

Overnight humidity will be moderate to locally poor over the higher

terrain. Cooler and more moist conditions return late this weekend.



$$



ECC014-280030-

Morgan Hill ECC Dispatch-

DISCUSSION FOR Alameda and Contra Costa and Santa Clara Counties

523 AM PDT Tue May 27 2025



Night and morning marine layer will impact the coast and locally

inland through Wednesday. Otherwise, mild and  dry conditions

persist through Wednesday with breezy winds each  afternoon and

evening. Building high pressure will bring a marked warming and

drying trend Thursday through Saturday. Triple digit heat will

impact the interior with daytime humidity reaching critical values.

Overnight humidity will be moderate to locally poor over the higher

terrain. Cooler and more moist conditions return late this weekend.



$$



ECC013-280030-

Felton ECC Dispatch-

DISCUSSION FOR Santa Cruz and San Mateo Counties

523 AM PDT Tue May 27 2025



Night and morning marine layer will impact the coast and locally

inland through Wednesday. Otherwise, mild and  dry conditions

persist through Wednesday with breezy winds each  afternoon and

evening. Building high pressure will bring a marked warming and

drying trend Thursday through Saturday. Triple digit heat will

impact the interior with daytime humidity reaching critical values.

Overnight humidity will be moderate to locally poor over the higher

terrain. Cooler and more moist conditions return late this weekend.



$$



ECC018-280030-

Monterey ECC Dispatch-

DISCUSSION FOR Monterey and San Benito County

523 AM PDT Tue May 27 2025



Night and morning marine layer will impact the coast and locally

inland through Wednesday. Otherwise, mild and  dry conditions

persist through Wednesday with breezy winds each  afternoon and

evening. Building high pressure will bring a marked warming and

drying trend Thursday through Saturday. Triple digit heat will

impact the interior with daytime humidity reaching critical values.

Overnight humidity will be moderate to locally poor over the higher

terrain. Cooler and more moist conditions return late this weekend.



$$