Phoenix weather: A warm week ahead

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by Meteorologist Royal Norman

Bio | Email | Follow: @RoyalNorman

azfamily.com

Posted on May 13, 2013 at 3:51 PM

Updated Monday, May 13 at 5:35 PM

PHOENIX -- Typical May weather is settling into Arizona and for the next week, desert highs will be running right about 100 degrees while in the high country, we'll see highs in the 70s and 80s. Here's the explanation from the National Weather Service Office in Phoenix:

Low pressure will slowly exit the region through Tuesday, but afternoon showers and possibly a thunderstorm remain possible in the higher terrain well east of Phoenix. Mostly sunny skies and well above normal temperatures are forecast for the remainder of our forecast area through late week with a slight cooling trend expected Friday into Saturday as a dry weather system passes by well to our north.

Ridge of high pressure centered over the northern great basin is dominating the western states. Meanwhile an upper low remains centered near central Baja Mexico for northeasterly flow aloft across Arizona and southeast California and a deformation zone over Texas. Water vapor imagery indicates a vort lobe on the eastern side of the low over Chihuahua with smaller perturbations within the confluent flow near the borderlands of southeast Arizona and new Mexico. The vort lobe is advertised to brush southeast Arizona by late Monday afternoon. This combined with slightly more moisture could lead to more high based convection over southeast Arizona than Sunday. Will need to see how convection unfolds later today, but if activity gets close enough to our area outflows could become an issue. Meanwhile, anticipate isolated convection once again over southern Gila County and this is where the pops are. Some additional warming can be expected Monday and this is reflected in the current forecasts. No changes at this time.

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