Area Forecast Discussion
Issued by NWS San Diego, CA

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS66 KSGX 231107
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
401 AM PDT TUE SEP 23 2014

.SYNOPSIS...
HIGH PRESSURE WILL BRING A WARMING TREND THROUGH THURSDAY...WITH
TEMPERATURES 5 TO 10 DEGREES ABOVE NORMAL WEDNESDAY AND THURSDAY.
THE MARINE LAYER WILL BE SHALLOW...SO THAT NIGHT AND MORNING LOW
CLOUDS WILL BE RESTRICTED TO JUST NEAR THE IMMEDIATE COAST. A
TROUGH OF LOW PRESSURE WILL MOVE INTO THE AREA LATE IN THE WEEK
THROUGH THE WEEKEND. THIS WEATHER FEATURE WILL BRING MUCH COOLER
WEATHER...WIDESPREAD LOW CLOUDS WEST OF THE MOUNTAINS...AND STRONG
WINDS IN THE MOUNTAINS AND DESERTS.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

HIGH PRESSURE WILL CONTINUE TO SPREAD ACROSS THE SOUTHWEST THROUGH
WEDNESDAY AND BRING ABOVE NORMAL TEMPERATURES TO THE ENTIRE REGION
THROUGH THURSDAY. TEMPERATURES UP TO 10 DEGREES ABOVE NORMAL ARE
EXPECTED FOR THE INLAND REGION AND ABOUT 5 DEGREES ABOVE NORMAL
NEAR THE COAST.

ON THURSDAY A STRONG UPPER LOW IN THE PAC NW WILL KICK A COLD
FRONT AS FAR SOUTH AS NORTHERN CALIFORNIA ALONG WITH A GOOD BAND
OF FRONTAL RAIN. THE FRONT WILL WASH OUT SOUTH OF SAN FRANCISCO
ALONG WITH THE RAIN CHANCES. BY FRIDAY THE PAC NW UPPER LOW WILL
GET KICKED SOUTH INTO CALIFORNIA BUT WILL BE MOISTURE STARVED.
THE ONSHORE GRADIENTS WILL INCREASE SUBSTANTIALLY AND WE DO STILL
SEE A POTENTIAL FOR ADVISORY LEVEL WINDS TO DEVELOP IN THE
MOUNTAINS AND DESERTS FROM FRIDAY INTO SATURDAY. THE STRONG UPPER
LEVEL TROUGH WILL PASS THROUGH CALIFORNIA AND BECOME NEGATIVELY
TILTED ON SATURDAY. ALTHOUGH PRECIPITATION IS UNLIKELY IN OUR
AREA...MOISTURE CONVERGENCE AND UPPER LEVEL ENERGY MAY BRING SOME
PRECIP TO SE CALIFORNIA...ARIZONA AND SOUTHERN NEVADA OVER THE
WEEKEND. BACK AT THE SOUTHERN CALIFORNIA COAST...THE MARINE LAYER
IS EXPECTED TO DEEPEN CONSIDERABLY FRIDAY THROUGH THE WEEKEND AS
THE ONSHORE FLOW CONTINUES. EXTENSIVE LOW CLOUDS WILL PUSH WELL
INLAND AND WE COULD SEE SOME STRATUS RELATED DRIZZLE ALONG THE
COAST.

IT`S LOOKING MORE LIKE EARLY NEXT WEEK WILL FEATURE CONTINUED
ONSHORE FLOW AND OUR REGION WILL BE ON THE SOUTHERN PERIPHERY OF YET
ANOTHER UPPER LEVEL PACIFIC TROUGH...KEEPING TEMPERATURES CLOSER TO
NORMAL AND KEEPING THE HIGH PRESSURE RIDGE JUST TO OUR SOUTH.

&&

.AVIATION...
230900Z...LOW CLOUDS WILL FILL THE COASTAL AREAS WITH CLOUDS BASED
AROUND 900 FEET MSL AND TOPS TO 1600 FEET. VIS RESTRICTIONS OF 3 SM
OR LESS WILL OCCUR WHERE LOW CLOUDS AND TERRAIN INTERSECT. CLEARING
15-17Z. AREAS OF LOW CLOUDS NEAR THE COAST WILL RETURN OVERNIGHT
MOST LIKELY AFTER 08Z...BUT WITH LESS CONFIDENCE ON TIMING AND
SPATIAL COVERAGE. WHEN/WHERE CIGS OCCUR THEY WILL BE AROUND 700 FEET
MSL. OTHERWISE...SKC WITH UNRESTRICTED VISIBILITY THROUGH TONIGHT.

&&

.MARINE...
200 AM...NO MARINE WEATHER HAZARDS ARE EXPECTED THROUGH THURSDAY.
STRONGER NORTHWEST WINDS FRIDAY AND SATURDAY IN THE OUTER WATERS.


&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...NONE.

&&

$$

PUBLIC...BROTHERTON
AVIATION/MARINE...MM









USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.