3:00 p.m. EDT Tuesday:
According to Bloomsberg, Isaac has now shut down 93 percent of oil output and 67 percent of natural gas output in the Gulf of Mexico.
As Isaac impacts the Gulf of Mexico, oil and gas companies have evacuated workers and shut down production.
Isaac's disruption of oil production makes oil and gas prices uncertain. One factor that could make the prices rise is the limited supply with Gulf oil production shutting down. The price of oil could drop, however, if the United States government releases oil from the Strategic Petroleum Reserve.
Based on Bureau of Safety and Environment Enforcement (BSEE) data from offshore operator reports submitted Sunday morning, one in 10 oils rigs and around one in 20 manned oil platforms evacuated workers.
Estimates from the BSEE Sunday had around a quarter of oil production closed in the Gulf of Mexico. Isaac halted less than 10 percent of natural gas production so far.
Map of oil rigs and platforms in the Gulf of Mexico in 2008 from GeoCommons.com. The map was produced and published by William Benjamin.
While prospects for a white Christmas are grim along the I-95 corridor, many communities from the Great Lakes to the Rockies should enjoy the desired snowy scene for the holiday.
AccuWeather RealFeel® temperatures will be in the 20s through midweek, but a cold front will drop those temperatures into the single digits by the end of the week.
Wet weather will be the theme for Seattle through at least the first part of the week.
Soggy weather will be the rule in the run-up to Christmas in the Atlanta area.
People who are dreaming of a white Christmas across the interior Northwest may see their dreams come true this year as another storm impacts the region.
Following benign weather this weekend, a major storm will affect Harrisburg, Pennsylvania, much of the East and Midwest on Christmas Eve.
N. California & Oregon (1964)
Great warm surge and torrential rains on deep snow cover; record floods followed.
Perey, IL (1967)
An F2 tornado carried women and her baby 400 feet; they survived.
Wind gusts to 91 mph across the San Joaquin Valley - hundreds of cars and trucks buried by blowing dust.