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Weekly Look Ahead

November 21, 2024 (Updated Every Thursday)

1–5 Day

In the next five days (November 21–25), moderate to heavy precipitation is forecast for the western and northeastern regions of the lower 48 states, and along the Canadian border. Lesser amounts, if any, are expected in and around the Plains and along most of the southern tier. The greatest amounts are forecast across northern California and the Sierra Nevada, where totals exceeding 5 inches are expected to be widespread, with the potential for as much as 15 inches at isolated spots in the higher elevations. In contrast, little or no precipitation is expected in the Plains from the central Dakotas southward, and along the southern tier of the country from southeastern California eastward through Georgia and most of the Carolinas. 

Very warm weather is expected in central and southern Texas, with temperatures expected to average 10–13 °F above normal. A larger area from eastern Arizona through the Lower Mississippi Valley is forecast to average 5–10 °F above normal. Meanwhile, unusually low temperatures are forecast from the central and western Dakotas through most of Montana. Temperatures may average up to 10 °F above normal from the Upper Mississippi Valley and central Plains westward through the Great Basin and northern Intermountain West. Near or slightly above-normal temperatures are expected elsewhere.

6–10 Day

The Climate Prediction Center’s 6–10 day outlook (valid November 26–30) favors above-normal precipitation from the Southwest and the Great Basin eastward through most of the Plains, and from Mississippi Valley eastward to the Atlantic Coast. Only the Northeast, Florida Peninsula, central and southern Texas, the Great Lakes, and the Far West are outside the area where above-normal precipitation is expected. Unusually dry weather is more likely in western Texas, the Northwest, parts of the Intermountain West, central and northern portions of the Rockies and Plains, and across Hawaii. 

Meanwhile, the southern U.S. from the Plains to the Atlantic Coast is expected to be warmer than normal. Hawaii is also expected to average warmer than normal, especially the central and northwestern islands. Cold weather is favored across central and northern portions of the Rockies, Plains, and Mississippi Valley, plus some adjacent areas. There are 70%–80+% chances for significantly below-normal temperatures from Montana east of the Rockies and most of the Dakotas.

 

This weekly look ahead is modified from the U.S. Drought Monitor's National Drought Summary for November 19, 2024, written by Richard Tinker (NOAA's Climate Prediction Center) and Richard Heim (NOAA's National Centers for Environmental Information).

Featured Outlooks & Forecasts

Predicting drought depends on the ability to forecast precipitation and temperature within the context of complex climate interactions. Many different datasets and maps are available that predict how precipitation and temperature may change in the future.

Official NOAA Drought Outlooks

Drought Is Predicted To...
Drought Is Predicted To...

Official NOAA Precipitation Forecast

Predicted Inches of Precipitation
1.75
Predicted Inches of Precipitation
1.75

Official NOAA Precipitation Outlooks

Probability of Below-Normal Precipitation
100%
Probability of Above-Normal Precipitation
100%
Probability of Below-Normal Precipitation
100%
Probability of Above-Normal Precipitation
100%
Probability of Below-Normal Precipitation
100%
Probability of Above-Normal Precipitation
100%
Probability of Near-Normal Precipitation
50%
Probability of Below-Normal Precipitation
100%
Probability of Above-Normal Precipitation
100%
Probability of Near-Normal Precipitation
50%

Official NOAA Temperature Outlooks

Probability of Below-Normal Temperatures
100%
Probability of Above-Normal Temperatures
100%
Probability of Below-Normal Temperatures
100%
Probability of Above-Normal Temperatures
100%
Probability of Below-Normal Temperatures
100%
Probability of Above-Normal Temperatures
100%
Probability of Near-Normal Temperatures
50%
Probability of Below-Normal Temperatures
100%
Probability of Above-Normal Temperatures
100%
Probability of Near-Normal Temperatures
50%

Challenges with Predicting Drought

Pressure Systems

High pressure systems, which hinder cloud formation and lead to low relative humidity and precipitation, can cause drought. When large-scale anomalies in atmospheric circulation patterns last for months or seasons, prolonged drought occurs (NDMC).

Temperate Zone Forecast Reliability

In temperate regions (above 30 north latitude), long-range forecasts have limited reliability. Due to differences in observed conditions and statistical models, reliable forecasts for temperate regions may not be attainable for a season or more in advance (NDMC).

Interconnected Variables

Anomalies in precipitation and temperature may last from several months to several decades, and how long they last can depend on air–sea interactions, soil moisture, land surface processes, topography, and weather systems at the global scale (NDMC).

ENSO and Global Weather Patterns

Teleconnections, such as ENSO and La Niña events, are atmospheric interactions between widely separated regions. Understanding these teleconnections can help in forecasting droughts, floods, tropical storms, and hurricanes (NDMC).