Area Forecast Discussion
Issued by NWS Sacramento, CA

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000
FXUS66 KSTO 291700
AFDSTO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
1000 AM PDT WED JUL 29 2015

.SYNOPSIS...
HOT AND DRY WEATHER TODAY AND 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...
HIGH PRESSURE RIDGING OVER THE SOUTHWEST US IS EXPANDING INTO
CALIFORNIA BRINGING AN INCREASINGLY WARM AIRMASS. A LIGHT DELTA
BREEZE IS BRINGING SOME SLIGHTLY COOLER TEMPERATURES THIS MORNING
FOR THE DELTA AND SACRAMENTO METRO AREA, WITH WARMER TEMPERATURES
ELSEWHERE. FOR THE NORTHERN SACRAMENTO VALLEY, IT IS QUITE A BIT
WARMER, REACHING 92 AT REDDING AND RED BLUFF BY 9 AM. WILL BE
BUMPING UP THE FORECAST HIGH FOR THAT AREA A FEW DEGREES, WITH THE
HIGH FOR REDDING INCREASING TO 110 AND RED BLUFF TO 109. WILL DROP
THE DELTA FORECAST A DEGREE OR SO. OTHERWISE, FORECAST IS ON
TRACK, WITH HOT TEMPERATURES ACROSS THE AREA AND DRY WEATHER.
TEMPERATURES ARE EXPECTED TO PEAK FOR THE SOUTHERN SACRAMENTO AND
NORTHERN SAN JOAQUIN VALLEYS TODAY, AND THEN COOL A LITTLE WITH AN
INCREASED DELTA FLOW OVERNIGHT INTO THURSDAY. ELSEWHERE, THE
HOTTEST TEMPERATURES ARE EXPECTED ON THURSDAY. 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 (LOWELL, WRAGG) DUE TO SMOKE.
DELTA BREEZE DEVELOPING AFTER 23Z GUSTS TO 25 MPH THROUGH THE
DELTA.
&&

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

$$



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