AREA OF FORECAST DISCUSSION: FOR SAN FRANCISCO BAY AREA

Wednesday, Aug 9, 2006
10:15 pm

DISCUSSION… TEMPERATURES QUITE WARM AROUND THE BAY AREA THIS AFTERNOON WITH PLENTLY OF HIGHS RECORED IN THE 80

Thursday, Aug 10, 2006
9:25 am

DISCUSSION… VISISBLE SATELLITE SHOWS THE MARINE LAYER PEAKING AT THE GOLDEN GATE EARLY THIS MORNING. CURRENT FORT ORD PROFILER SHOWS THIS MARINE LAYER IS SHALLOW BECAUSE OF THE DEEP WARM AIR THAT REMAINS ALOFT. THE FORT ORD ALSO NOTED OVER THE PAST 7 HOURS THE MARINE LAYER IS INCREASING HEIGHT. I EXPECT THIS TREND TO CONTINUING THROUGH THE DAY AND INTO TOMORROW. THE CURRENT KOAK SOUNDING INDICATED THE INVERSION AT 950 MB ASSOCIATED WITH A WEAK SOUTHERLY SURGE, WHICH WILL HELP SHOVE IN THE MARINE LAYER TODAY.PRESSURE IS MUCH LOWER COMPARED TO YESTERDAYS AT 1015 MB AND CURRENTLY AT 1013, WHICH IS EXPECT TO DECREASE LATER ON AND DEVELOP A MODERATE SEA BREEZE. WATER VAPOR IMAGE INDICATES THE TROUGH 130˚ W AND 43˚ N AND EXPECTED TO MOVE IN LATER ON TODAY.

WARM TEMPERATURES TODAY BUT MUCH COOLER FOR THE COASTAL COMMUNITIES TODAY AS THE SEA BREEZE PUSH IN THE MARINE LAYER. THIS MARINE LAYER WILL RAPIDLY THICKEN OVERNIGHT AS THE TROUGH PASSES THROUGH AND RAISE THE INVERSION LAYER. THE TROUGH IS CURRENTLY TONGUING THE OREGON COAST AT THIS HOUR AND EXPECTED TO MOVE THROUGH LATER THIS AFTERNOON. THIS WILL HELP DEEPEN THE MARINE LAYER OVERNIGHT AND MAY BRING SOME COASTAL DRIZZLE, ESPECIALLY INTO FRIDAY. AS THE TROUGH MOVE THROUGH LATE TONIGHT A SHORTWAVE WILL DEVELOP FRIDAY AND THIS WILL HELP DEEPEN THE MARINE LAYER EVEN MORE, PERHAPS UP TO 2500 FT.

LONG RANGE… TROUGH PUSHES FAR NORTHEAST INTO CANADA AND A WEAK SAHLLOW CUT OFF LOW DEVELOPS LATE SATURDAY AND CONTINUE THROUGH THE WEEKEND.THE LOW WILL DEVELOP A SOUTHERLY SURGE AND PILE UP THE MARINE LAYER AGAINST THE COAST SUNDAY AND INTO THE EARLY NEXT WEEK. COOL TMEPERATURES WILL PREVAIL ACROSS THE WEST.

SCA ADVISORY WILL BE IN AFFECT AS THE STRONG SEA BREEZE WINDS KICK IN LATER THIS AFTERNOON. WINDS AT 20KT AND GUST TO 25KT… SCA ADVISORY AFFECTS SAN FRANCISCO SHORELINE, ACROSS THE BAY AND DOWN THE PENINSULA TO THE SAN MATEO COAST.

Please send delta breeze my way…thanks :slight_smile:

My WxSim forecast for my location:

Today: Mostly sunny, but some high thin clouds in the morning, becoming sunny, with just a few high thin clouds in the afternoon. High 94. Wind southwest around 5 mph.

Tonight: Mostly clear, with just a few high thin clouds. Low 67. Wind south
around 3 mph in the evening, becoming east-southeast after midnight.

Friday: Sunny, with just a few high thin clouds. High 92. Wind south-southwest
around 3 mph in the morning, becoming 6 mph in the afternoon.

Friday night: Mostly clear, with just a few high thin clouds. Low 66. Wind
south-southwest around 3 mph in the evening, becoming south-southeast after
midnight.

Saturday: Sunny. High 92. Wind southwest around 4 mph.

Saturday night: Clear. Low 66. Wind south-southwest near calm in the evening,
becoming east after midnight.

Sunday: Sunny. High 93. Wind southwest around 4 mph.

Sunday night: Clear in the evening, becoming mostly clear after midnight. Low
67. Wind south-southwest around 3 mph.

Monday: Sunny. High 92. Wind south around 5 mph.

Monday night: Clear. Low 66. Wind south around 2 mph in the evening, becoming
southeast after midnight.