Select NOAA-NWS Forecast Office Text Products
NOAA NWS Area Products

Forecast Discussion for Sacramento, CA

To Select Another NWS Office Click on Map or Choose from List
County Warning Area MAP

(Product availability varies with seasons, forecast office, and weather.)

Select Forecast Office:   Select Product:  
FXUS66 KSTO 310842

Area Forecast Discussion
National Weather Service Sacramento CA
142 AM PDT Sat Jul 31 2021

Late day mountain thunderstorm chances expected through the
weekend. Temperatures will gradually moderate through the weekend,
returning to near-normal by Sunday.


Plenty of mid- and high-level clouds passing overhead tonight as
leftover remnants from the afternoon and evening convection.
Composite radar still shows some showers to the east of the Sierra
crest this early Saturday morning, as well as a few echos from
showers in Shasta County. Onshore gradient from San Francisco to
Sacramento is stronger compared to this time 24 hours ago, and is
reflected in the winds at Travis Air Force Base with gusts around
25 kt. Should see overnight lows in/around the Delta a tad cooler
than Friday with temperatures around sunrise in the 50s to 60s
from Solano to Sacramento Counties, and middle 60s to low 70s for
other Valley communities.

Broad and high-amplitude upper level ridge over the Great Plains
will begin to weaken over the next 24 hours. Decreasing
geopotential heights aloft should bring minor synoptic-scale
cooling to the region this afternoon as well as on Sunday. Highs
today will range from the upper 80s in the Delta, middle 90s to
near 100 in Sacramento County and northern San Joaquin Valley, and
100 to 105 deg F for the central and northern Sacramento Valley.
Afternoon and evening shower/thunderstorm chances will be renewed
again this afternoon, generally impacting the Sierra and southern
Cascades. Best chances will likely be along and to the east of
the crest, but can`t rule out a slight chance on the west side. If
you have outdoor plans this weekend in the mountains, keep and
eye on the skies, and when thunder roars go indoors!

Upper level ridge will retrograde west toward the Desert Southwest
and Rockies through the weekend. Combined with an upper level
trough west of California, southwesterly flow aloft will prevail
for the region into the first half of next week. Minimal day-to-
day changes in temperatures are forecast as most locations will
land near or just above early August climatological normals.
// Rowe


Clusters and ensemble guidance continue to favor dry, southwest
flow aloft through the end of next week with an upper level ridge
parked over the Desert Southwest / southern California and a
trough off the West Coast. National Blend of Models has a moderate
spread in the 25th to 75th percentile temperatures by Thursday --
96 to 103 deg F for KRDD and 93 to 100 deg F for KSAC. A few
clusters hint at the shortwave trough clipping far northwest
California late next week, though still plenty of uncertainty this
far out. Overall generalization for mid/late next week has
temperatures within about 5 deg F of normal with occasional breezy
conditions around the Delta. // Rowe

Mainly VFR conditions for the next 24 hours. Local MVFR/IFR
conditions over Plumas and Butte Counties due to wildfire smoke.
HZ may impact RDD/RBL after 22Z due to an additional wildfire.
Onshore flow with surface gusts up to 20 knots this afternoon in
the Central Valley, and up to 30 knots in the vicinity of the
Delta. Isolated- scattered showers and thunderstorms over the





Previous Forecast Discussions may be found at
NWS Sacramento, CA (STO) Office Forecast Discussions.
(Click 'Previous Version' there to view past versions successively.
Some may differ only in time posted.)

San Juan, PRHonolulu, HI Lake Charles, LA Pueblo, CO Corpus Christi, TX St. Louis, MO Reno, NV Raleigh, NC  Newport/Morehead City, NC Dodge City, KS Houston/Galveston, TX San Joaquin Valley/Hanford, CA Louisville, KY Fort Worth, TX Pittsburgh, PA Austin/San Antonio, TX Sacramento, CA Jackson, MS Phoenix, AZ Northern Indiana, IN Flagstaff, AZ Tallahassee, FL Springfield, MO Riverton, WY Blacksburg, VA Sioux Falls, SD El Paso Area, NM Columbia, SC Wilmington, NC Greenville-Spartanburg, SC Eureka, CA Midland/Odessa, TX Tucson, AZ Goodland, KS Huntsville, AL Amarillo, TX Norman, OK Lubbock, TX Marquette, MI Little Rock, AR Pendleton, OR Missoula, MT Binghamton, NY Boston, MA Green Bay, WI Billings, MT Baltimore/Washington San Diego, CA Tampa Bay, FL Morristown, TN Twin Cities, MN Brownsville, TX Portland, OR Des Moines, IA Memphis, TN Pocatello, ID San Angelo, TX Jacksonville, FL Aberdeen, SD Quad Cities, IA/IL Charleston, SC New Orleans/Baton Rouge, LA Peachtree City, GA Shreveport, LA Grand Rapids, MI Medford, OR Albany, NY Wichita, KS Gray/Portland, ME Spokane, WA Boise, ID Denver/Boulder, CO Great Falls, MT Caribou, ME Key West, FL Miami-South Florida, FL New York City/Upton, NY Melbourne, FL Hastings, NE Paducah, KY Glasgow, MT Bismarck, ND Charleston WV Omaha/Valley, NE Buffalo, NY Jackson, KY Kansas City/Pleasant Hill, MO Gaylord, MI Cheyenne, WY Grand Forks, ND Detroit/Pontiac, MI Central Illinois, IL Burlington, VT Salt Lake City, UT Topeka, KS Nashville, TN Milwaukee/Sullivan, WI Albuquerque, NM Las Vegas, NV Wakefield, VA La Crosse, WI Birmingham, AL Los Angeles/Oxnard, CA Chicago, IL Seattle, WA Rapid City, SD Indianapolis, IN Philadelphia/Mount Holly, PA Mobile/Pensacola State College, PA Cleveland, OH Elko, NV Wilmington, OH Grand Junction, CO North Platte, NE Tulsa, OK San Francisco/Monterey Bay Area, CA Duluth, MN Anchorage, AK Fairbanks, AK Juneau, AK Tiyan, GU

Products Courtesy of NOAA-NWS
NWS Information Parsing Script by Ken True at Saratoga Weather - WFO and Products Scripts by SE Lincoln Weather.
Mapping by Curly at Michiana Weather and by Tom at My Mishawaka Weather.

powered by Cumulus v1.9.3 (1059)
Ambient Weather VWS v14.00
Top Website Map Copyright © 2007 - 2021 Never base important decisions on this or any weather information obtained from the Internet