Heres NOAAs outlook for US summer weather—and hurricane season

Enlarge / Let's start with something nice… check the orange popping out of this April 14 satellite image of the Antelope Valley California Poppy Reserve.NASA EO

On Friday, NOAA released its latest seasonal weather outlook for the US, which followed an updated hurricane season outlook. As always, the seasonal outlook starts with a look back at the previous month.

April 2020 was the 2nd warmest April on record globally, but a southward meander of the jet stream over Canada and the eastern US made this region of North America the exception. For the contiguous US, April was slightly below the average going back to 1895. Precipitation was similarly just below average, but a few states including Colorado and Nebraska had an extremely dry April, while the Virginias and Georgia were extremely wet.

  • This was the 2nd warmest April on record, globally. NOAA
  • Here's how US precipitation compared to averages for April. NOAA

If you live around the Midwest or Plains states, you wont be surprised to hear that recent weeks have not been particularly warm. Thats because mid-April saw a hard freeze come through, with another freeze in the second week of May. While the April freeze wasnt really late compared to the long-term averages, it followed a warm spring that caused vegetation to pop up early in many places—only to be bitten by a frost.

As a result, some crops saw significant damage. Winter wheat that had sprouted was hit in the Central Plains. Elsewhere, some vegetables that had been planted were lost, and fruit trees were particularly vulnerable. For example, NOAAs briefing pointed to peach orchards in Colorado that reported losses of up to 90 percent.

The outlook through August—based on things like sea surface temperature patterns in the Pacific, long-term patterns and trends, and some long-range modeling—shows widespread warm temperatures but an east-west divide in precipitation.

The El Niño Southern Oscillation in the Pacific remains in a neutral state, and so is not loading the dice for anything particularly unusual. The model forecast is starting to lean towards mild La Niña conditions this fall, though, which would bring an end to an extended run stuck in neutral.

Warmer-than-average temperatures are expected to dominated for most of the US, including Alaska. The Midwest and Northern Plains have equal chances to come in above or below average, though. As for precipitation, most of the eastern US sees solid odds for above-average rainfall, while the northern tier of western states is likely to be below-average.

Its no surprise, then, that existing droughts from Colorado across to Northern California and up to Washington are expected to persist and expand. Hawaii and Puerto Rico are also seeing drought conditions that arent expected to change. Some areas around the Gulf Coast may well see an end to their droughts, though.

  • The temperature outlook for June, with colors showing areas of probability favoring warmer or colder temperatures than average. NOAA
  • The precipitation outlook through June. NOAA
  • Temperature outlook for June, July, and August. Read More – Source [contf] [contfnew]


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