Weather Service Report


007 
FXUS66 KMTR 252248
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
248 PM PST SUN JAN 25 2015

.SYNOPSIS...DRY WEATHER AND UNSEASONABLY WARM TEMPERATURES WILL
PERSIST THROUGH MONDAY AS THE REGION REMAINS UNDER A STRONG RIDGE
OF HIGH PRESSURE. A WEAK STORM SYSTEM WILL THEN APPROACH SOUTHERN
CALIFORNIA MONDAY NIGHT INTO TUESDAY AND BRING A CHANCE OF LIGHT
PRECIPITATION TO THE CENTRAL COAST.

&&

.DISCUSSION...AS OF 2:48 PM PST SUNDAY...FOG HAS CLEARED FROM ALL
AREAS IN THE CWA...BUT EVEN WITH AFTERNOON SUNSHINE...AREAS AROUND THE
GREATER SAN FRANCISCO BAY HAVE BEEN VERY SLOW TO WARM UP. THE
COOLEST LOCATION AS OF 2 PM WAS NAPA AIRPORT AT A CLAMMY 54
DEGREES. OAKLAND AND HAYWARD ARE 13 AND 15 DEGREES COOLER THAN
YESTERDAY AT THIS TIME...AND ARE STRUGGLING TO GET OUT OF THE 50S.
THE DIFFERENCE IS IN THE WIND. YESTERDAY MUCH OF THE AREA
EXPERIENCED DOWN-SLOPING OFFSHORE WINDS WHILE TODAY WINDS HAVE
SWITCHED TO A LIGHT SEA BREEZE. MEANWHILE...LOCATIONS FROM THE 
MONTEREY BAY SOUTHWARD HAVE WARMED TO THE THE UPPER 70S AND 80S.
CURRENTLY WATSONVILLE AND SALINAS ARE REPORTING 80 AND 81 DEGREES
RESPECTIVELY...AND THE HIGH SO FAR TODAY AT THE WEATHER OFFICE IN
MONTEREY HAS BEEN 77 DEGREES. RIGHT NOW THE ONLY LOCATIONS THAT
ARE IN JEOPARDY OF BREAKING HIGH TEMPERATURE RECORDS ARE IN
MONTEREY OR SANTA CRUZ COUNTIES. 2 PM TEMPERATURES AT SFO AND MRY
AIRPORTS ARE 23 DEGREES APART: 57 VERSUS 80.

BEGINNING TOMORROW THE UPPER RIDGE WILL BEGIN TO WEAKEN AND SHIFT
EASTWARD AS A DISTURBANCE OVER SOUTHERN CALIFORNIA AND ARIZONA
BEGINS TO MOVE TO THE NORTH AND INTO CENTRAL CALIFORNIA. THIS IS
EXPECTED TO ADVECT SOME MOISTURE INTO THE SOUTHERN ZONES...THUS A
SLIGHT CHANCE OF LIGHT RAIN IS POSSIBLE ACROSS MAINLY THE SOUTHERN
HALF OF THE DISTRICT ON TUESDAY MORNING. BY LATER IN THE DAY THE
DISTURBANCE WILL EJECT TO THE EAST AND SHOWER CHANCES WILL END.
DRY AND MILD CONDITIONS ARE INDICATED FOR THE REST OF THE WEEK AS
THE AREA REMAINS UNDER WEAK HIGH PRESSURE. TEMPERATURES ARE
EXPECTED TO WARM AGAIN BY THE END OF THE WEEK.

&&

.AVIATION...AS OF 9:50 AM PST SUNDAY... PORTIONS OF THE NORTH AND
EAST BAY INTERIOR VALLEYS UNDER LOW CLOUDS AND FOG THIS MORNING.
THESE AREAS SHOULD IMPROVE AROUND 19Z HOWEVER LINGERING HZ WILL
PERSIST THROUGH THE DAY. OTHERWISE... VFR WITH LIGHT OFFSHORE
WINDS. BKN TO OVC HIGH CLOUDS WILL MOVE IN FROM THE SOUTH A FEW
HOURS BEFORE SUNRISE MONDAY.

VICINITY OF KSFO...VFR. LIGHT OFFSHORE WINDS. 

KSFO BRIDGE APPROACH...SIMILAR TO KSFO EXCEPT AREAS OF HAZE.

MONTEREY BAY AREA TERMINALS...VFR. LIGHT SE WINDS EXCEPT UP TO
10-12 KNOTS AT KSNS.

&&

.CLIMATE...RECORD HIGH TEMPERATURES ARE POSSIBLE OVER THE AREA TODAY.
HERE IS THE LIST OF RECORDS ALONG WITH THE JANUARY WARMEST HIGH
TEMPERATURE READINGS AND THE LATEST YEAR THEY OCCURRED.

SF BAY AREA...

LOCATION       TODAY (1/25)  JANUARY WARMEST
KENTFIELD        77/1934       79/1962
SAN RAFAEL       70/2014       82/1962
NAPA             83/1899       85/1962
SAN FRANCISCO    74/1899       79/1962
SFO AIRPORT      68/2011       73/2014
OAKLAND          73/2014       78/2014
OAK AIRPORT      70/2014       77/2014
RICHMOND         69/2011       76/1962
LIVERMORE        73/1911       77/1911
MOUNTAIN VIEW    72/2014       76/1948
SAN JOSE         71/2014       79/1962
GILROY           77/2014       80/2014

NORTH CENTRAL COAST...

MONTEREY         78/1942         84/2014
SANTA CRUZ       80/1899         84/2014
SALINAS          78/2014         87/2014
SNS AIRPORT      78/2014         86/2014
KING CITY        77/2014         86/1976

&&

.MARINE...AS OF 2:19 PM PST SUNDAY...LIGHT OFFSHORE FLOW NEAR THE
COAST WITH SOUTHERLY FLOW FURTHER OFFSHORE DUE TO HIGH PRESSURE
OVER THE GREAT BASIN OVER THE NEXT 24 HOURS. WINDS VEER TO THE
SOUTH TUESDAY WITH NORTHERLY WINDS RETURNING LATE WEDNESDAY.
NORTHWEST SWELL WILL GRADUALLY DIMINISH THROUGH THE UPCOMING WEEK.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...NONE

&&

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: DRP
CLIMATE: CANEPA/JOHNSON 

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA





Return to Home page


Western Regional Climate Center, wrcc@dri.edu