Posted 8:41 AM 8/28/2012 : Thunder-free the next 72 hours
TUCSON - Little storm activity, lots of heat today.
High pressure over Colorado draws in dry air to southern Arizona, according to News 4 Meteorologist Jeff Beamish. This feature dominates the weather through Thursday, as partly cloudy skies and highs at or near triple digits is expected. Gusty winds up to 20 MPH this morning should subside this afternoon around 10-15 MPH out of the east-southeast.
There is a slight chance of an isolated storm or two west of a Gila Bend-Arivaca line this afternoon, which puts the Monsoon Prediction Index at 2 out of 10 for the low risk of severe weather.
Storm chances increase late week, as Tropical Storm Ileana off the Mexico coast sends Monsoon moisture surging up the Gulf of California. Isolated storms return to the forecast Friday through early next week. Highs by then should drop into the mid 90's for Tucson.
Posted 2:11 AM 8/28/2012 : Forecasters: Isaac on verge of becoming hurricane
MIAMI (AP) - Forecasters say Isaac is on the verge of becoming a hurricane as it bears down on the northern Gulf Coast.
The U.S. National Hurricane Center said at 5 a.m. EDT on Tuesday that Isaac was still a tropical storm but was likely to become a hurricane during the day as it gained strength over the Gulf of Mexico.
Isaac is expected to make landfall over southeastern Louisiana, possibly the New Orleans area, either late Tuesday or early Wednesday.
The center of the storm was located about 125 miles south-southeast of the mouth of the Mississippi River. It has top sustained winds of 70 mph and is moving to the northwest at 12 mph.
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