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As a result, meteorologists expected a storm mode of discrete supercells to develop. This, along with even stronger CAPE values and a more unstable environment across Illinois and eastern Missouri, led to the SPC "bridging" the two main moderate-risk areas and giving a 15% hatched risk for significant tornadoes at their 1300 UTC outlook.
The modified time is called "Central Daylight Time" (CDT) and is UTC−05:00. [citation needed] In the United States, all time zones that observe DST were effectively changed by the Energy Policy Act of 2005. Beginning in 2007, DST would now begin at 2 a.m. (02:00) on the second Sunday in March instead of the first Sunday in April, moving the ...
A cropped satellite image shows the supercell thunderstorm that produced the 2011 Joplin tornado at 22:45 UTC, just as it was moving through the city. By 8:00 a.m. CDT (1300 UTC) on May 22, forecasters at the SPC realized that a more intense weather outbreak was likely to occur, and upgraded a large swath of the Midwest to a moderate risk.
The tornado was rated as a high-end EF3 with wind speeds estimated at 155 mph (249 km/h), reaching a peak width of 1,300 yards (1,200 m) along a 34.64-mile (55.75 km) path, remaining on the ground for 38 minutes. [11] As this tornado was ongoing, a separate circulation spawned the violent Greenfield tornado. [12]
UTC−08:00 – Pacific Time zone: the Pacific coast states, the Idaho Panhandle and most of Nevada and Oregon UTC−07:00 – Mountain Time zone: most of Idaho, part of Oregon, and the Mountain states plus western parts of some adjacent states UTC−06:00 – Central Time zone: a large area spanning from the Gulf Coast to the Great Lakes
This is a list of the UTC time offsets, showing the difference in hours and minutes from Coordinated Universal Time (UTC), from the westernmost (−12:00) to the easternmost (+14:00). It includes countries and regions that observe them during standard time or year-round.
The 1300 UTC day one convective outlook, showing a high risk area in south-central Nebraska and western Kansas, surrounded by a large area of moderate and slight risk across the Great Plains. It is the combination of warm humid air from the Gulf and dry air from the deserts of the Southwest that produce deadly storms. [2]
At the 1300 UTC outlook, however, that was omitted and replaced with another 15% hatched risk area for tornadoes across Southeastern Virginia and Eastern North Carolina. [7] Strong tornadoes impacted the East Coast states of Virginia, Pennsylvania, and North Carolina on February 24 with many other tornadoes occurring elsewhere.