It’s Not Just Drought Meteorologists Are Concerned About This Summer, It’s Also Heat

With the record heat across the Plains and South last week, a sudden burst of cold across the upper Midwest and the outbreak of tornadoes that tore across the country over the weekend, it’s been an active weather pattern so far this May. That trend is set to continue.

As forecasters look ahead, NOAA’s latest summer outlook points to dry conditions across much of the western U.S. as well as above-normal temperatures across the country.

Summer Pattern Takes Shape
USDA meteorologist Brad Rippey says the U.S. has been in “atmospheric limbo” for the past six weeks. That’s been the catalyst for the weather extremes.

“Think back to the early April flooding in the Mid-South and the early May flooding in the Southern Plains. We saw a heat wave across the Northern Plains last week, so very extreme weather. But it’s shifting around,” Rippey says.

He says now we’re waiting for the arrival of the summer lock-in, a pattern that typically takes shape by Memorial Day and provides a fairly stable pattern for the summer months.

(CPC )

“It’s starting to look like by the end of May into June we will see a ridge developing somewhere across the western half of the country as that begins to lock in. This is the expectation for June, which is below-normal precipitation in much of the western half of the country, possibly extending onto the High Plains. And then wet conditions will either develop or continue in the East,” says Rippey, pointing to the latest outlook from the National Weather Service.

Heat and Drought Ahead
Rippey says the outlook shows a stark difference between the East and West of the country, where the East is expected to see moisture, and the West is expected to be dry.

(CPC )

(CPC)

“The June, July and August outlook from the National Weather Service is kind of the same picture,” Rippey says. “The climate models have been very consistent for a number of months now in showing we will have a ridge across Western North America that could lead to either drought development, drought continuation or even drought expansion across some of the Northern Plains and northwestern areas of the country.”

The summer outlook also looks to bring the heat. The latest forecast indicates the entire U.S. will likely experience above normal temperatures this summer.

Recent Rains Were Needed

(Pivotal Weather )

The north Central U.S. received some much-needed rain over the weekend. Nebraska and the Dakotas saw anywhere from a trace of rain to 4", but Rippey is concerned that moisture may be short-lived.

“We could trend back into a warmer, drier pattern as we move into the summer. Watch for that drought to potentially expand eastward as we move into and through the summer months,” Rippey says.

Drought Expansion

(CPC )

The U.S. Seasonal Drought Outlook, which is also released by the NWS Climate Prediction Center, shows the expectation drought will either persist or develop during the June, July and August time frame.

“By the time we get to the end of August, this is their expectation for drought coverage. Note the expansion in places like the Dakotas, even into the Western Corn Belt. That’s where we’ll be watching because it starts intersecting some of our major crop areas where we could see significant drought during the growing season,” Rippey says.

According to the Climate Prediction Center outlook, there are conflicts when it comes to Arizona. The outlook points toward wetter-than-normal conditions in much of Arizona, but CPC says models provide conflicting and generally weak indications. That means it’s unclear as to exactly which areas of the monsoon region may receive meaningful rainfall, and whether it would be enough to improve the drought designations by at least one category during the summer season.