Area Forecast Discussion
Issued by NWS Sacramento, CA

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
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

000
FXUS66 KSTO 300547
AFDSTO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
1047 PM PDT WED JUL 29 2015

.SYNOPSIS...
HOT AND DRY WEATHER AGAIN ON THURSDAY WITH A SLIGHT COOLING
FRIDAY INTO NEXT WEEK. SCATTERED MOUNTAIN THUNDERSTORMS FRIDAY AND
OVER THE WEEKEND AS MONSOON MOISTURE IS PULLED
NORTHWARD...OTHERWISE CONTINUED DRY.

&&

.DISCUSSION...
TEMPERATURES ARE STILL WARM BUT STARTING TO COOL OFF. A DELTA
BREEZE IS STARTING THAT WILL LIKELY HELP TO COOL THE SACRAMENTO
REGION A LITTLE FROM TODAYS HIGHS ON THURSDAY. VERY HOT
TEMPERATURES WILL CONTINUE OVER THE NORTH END OF THE VALLEY ON
THURSDAY BEFORE A COOLING TREND SETS IN. THE UP VALLEY FLOW OVER
THE NORTH END OF THE VALLEY WILL LIKELY HAVE SOME MODERATE
SOUTHERLY WINDS AND GUSTS BY LATE AFTERNOON AND EARLY EVENING.
THE DELTA BREEZE MAY STAY UP A BIT DURING THE DAY BUT SHOULD
INCREASE DURING THE LATE AFTERNOON AND EVENING HOURS. WINDS ALONG
THE COASTAL RANGE WILL LIKELY SHIFT TO THE WEST BY MID AFTERNOON
AND BECOME GUSTY. MONSOONAL MOISTURE MAY START TO SPREAD A FEW
CLOUDS OVER FAR THE SOUTHERN PORTION OF CWA IN THE AFTERNOON WITH
AN ISOLATED THUNDERSTORM POSSIBLE ALONG THE CREST.

.PREVIOUS DISCUSSION...
HOT TEMPERATURES ARE PRESENT ACROSS THE AREA AS HIGH PRESSURE
RIDGING FROM THE SOUTHWEST EXPANDS ACROSS SOUTHERN CALIFORNIA. AT
3 PM IT WAS 109 AT REDDING, 108 AT RED BLUFF, 105 AT DOWNTOWN
SACRAMENTO...VACAVILLE AND STOCKTON. AFTERNOON HIGHS COULD STILL
HEAT UP A COUPLE MORE DEGREES. IT LOOKS LIKE THE SACRAMENTO RECORD
OF 106 IS IN JEOPARDY...WHILE THE RECORD HIGH OF 116 IS LIKELY TO
STAND.

THE DELTA BREEZE WILL GRADUALLY INCREASE THIS EVENING. THIS WILL
BRING SOME COOLING OVERNIGHT INTO THURSDAY FOR THE DELTA, THE SOUTHERN
SACRAMENTO AND NORTHERN SAN JOAQUIN VALLEYS, THOUGH THE MARINE
LAYER IS SHALLOW, SO NOT EXPECTING AN ESPECIALLY STRONG, COOL
BREEZE. AREAS IN THE FOOTHILLS, MOUNTAINS, AND NORTHERN SACRAMENTO
VALLEY WILL REMAIN QUITE WARM TONIGHT, AND THE HOTTEST
TEMPERATURES THIS WEEK ARE EXPECTED ON THURSDAY. SOME FOOTHILLS
LOCATIONS MAY STAY AROUND 80 DEGREES OVERNIGHT, WITH MID TO UPPER
70S FOR THE NORTHERN SACRAMENTO VALLEY.

GRADUAL COOLING IS EXPECTED FRIDAY THROUGH THE WEEKEND. THE
NORTHERN SACRAMENTO VALLEY WILL REMAIN IN THE TRIPLE DIGITS, WHILE
OTHER VALLEY SPOTS WILL BE IN THE 90S, CLOSE TO NORMAL LEVELS.

MONSOONAL MOISTURE CONTINUES TO BRING THE POTENTIAL FOR MOUNTAIN
THUNDERSTORMS, FOR JUST NORTH OF YOSEMITE ON THURSDAY AFTERNOON,
SPREADING NORTHWARD ON FRIDAY. STORMS ARE EXPECTED TO BE MORE ON
THE ISOLATED SIDE. THERE IS SOME POTENTIAL FOR LIGHTNING STRIKES
TO START NEW FIRES, ESPECIALLY IN AREAS THAT HAVE SEEN LITTLE RAIN
IN RECENT WEEKS. EK
&&
.EXTENDED DISCUSSION (SUNDAY THROUGH WEDNESDAY)

HIGH PRESSURE WILL GRADUALLY WEAKEN AND SHIFT EAST DURING THE
EXTENDED PERIOD AS A TROUGH DEVELOPS OFFSHORE. THIS PATTERN WILL
LIKELY SHUNT DEEPER MOISTURE AND INSTABILITY TO THE EAST OF THE
SIERRA/CASCADE CREST WITH TIME LIMITING MOUNTAIN THUNDERSTORM
CHANCES. TEMPERATURES WILL LIKELY ALSO RETURN TO NEAR AVERAGE
LEVELS FOR EARLY AUGUST AS THE AIRMASS OVER THE REGION COOLS A
BIT AND ONSHORE FLOW INCREASES.
&&

.AVIATION...

VFR CONDITIONS NEXT 24 HOURS FOR TAF SITES. POSSIBLE LOCAL VSBY
RESTRICTIONS NEAR CURRENT FIRES DUE TO SMOKE. DELTA BREEZE
GUSTS TO 30 MPH THROUGH THE DELTA OVERNIGHT.
&&

.STO WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$


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