Long Range Weather Forecast Discussion November 9-23
133 PM EST Fri. Nov.6, 2026Nov. 9-13: A trough, ridge, and trough pattern is forecast from the eastern Pacific to the Atlantic Coast.
A deep Pacific trough, a southwesterly flow, and moisture will cause rounds of precipitation and gusty winds to the West Coast and Northwest. Farther south, the southern-stream trough will bring showers and thunderstorms across portions of Texas into the Gulf Coast. Farther east, lingering cyclonic flow and associated frontal boundaries should maintain precipitation chances across portions of the Southeast and eastern seaboard. The northern states will experience increased chances of precipitation as several shortwaves move across the Great Lakes and the Northeast.
Nov. 14-18: The eastern trough moves out and is replaced by higher heights and a zonal flow.
A low offshore will bring precipitation to the Northeast on Thursday and Friday. Snow will be possible in the interior. A Pacific system moves into the Northwest on Saturday, bringing snow with rain and high-elevation snow. Above-normal temperatures are forecast from the Pacific Coast into the Great Lakes region, Midwest to the Gulf Coast. Anomalies could exceed 6°F in some locations.
TEMPERATURES
Yellow-2-4°F Above
Orange-4-6°F Above
Red-6-8°F
or Greater Above
Light Blue 2-4F Below
Medium Blue-4-6F Below
Dark Blue-6-8F or Great Below
Above-normal temperatures are forecast from the Pacific Coast into the Great Lakes region, Midwest to the Gulf Coast. Anomalies could exceed 6°F in some locations.
PRECIPITATION
Yellow 35%Below
Brown-35-45% Below
Dark Brown-45-55% Below
Light Green-30-35% Above
Medium Green-35-45% Above
Dark Green-45-55%Above
Above-normal precipitation is forecast for the West Coast, eastern Texas, and a portion of the Gulf Coast States. The probability of occurrence is up to 40 percent along the West Coast.
Nov. 19-23: Above-normal heights and a zonal flow are expected across the country this period.
A front moving through the East on Friday will cause rain and storms from the Midwest to the lower Mississippi Valley. Another Pacific system will approach the Northwest late in the period.
TEMPERATURES
Yellow-2-4°F Above
Orange-4-6°F Above
Red-6-8°F
or Greater Above
Light Blue 2-4F Below
Medium Blue-4-6F Below
Dark Blue-6-8F or Great Below
Below-normal temperatures are forecast for the Northwest, the northern and central Rockies, and parts of western California. Anomalies are expected to be near 4°F. Above-normal temperatures are forecast for the Plains to the Atlantic Coast. Anomalies could be near 8°F in the upper Mississippi Valley.
PRECIPITATION
Yellow 35%Below
Brown-35-45% Below
Dark Brown-45-55% Below
Light Green-30-35% Above
Medium Green-35-45% Above
Dark Green-45-55%Above
Above-normal precipitation is forecast for most of the West. The probability of occurrence is near 45 percent across the Northwest. Below-normal precipitation is forecast for a portion of the southern Plains and the area east of the Mississippi River. The probability of occurrence is 35-40 percent.
6-10 & 11-15 HEIGHT ANOMALIES
