Clear and Cooler Temperatures Across Much of the Eastern U.S.; Heavy Rain in Florida

A high pressure system is bringing mostly clear skies and cooler temperatures across much of the eastern U.S. to the Mid-South. A stationary front will produce thunderstorms and heavy rain across the Florida Peninsula to the immediate Southeastern coast. Severe thunderstorms are possible across portions of the central and southern Plains. Read More >

What is "Z" Time?

Since weather observations and forecasts are provided around the globe, it is important to understand when each piece of data is valid for. To overcome the problem of numerous time zones, it was internationally agreed upon that weather time stamps would be based on the Prime Meridian, or Greenwich Mean Time (GMT).

Other names for GMT include Universal Time Coordinated (UTC) or "Z" Time.

In the Mountain Time Zone:

Z = MST + 7 hours
Z = MDT + 6 hours
or
MST = Z - 7 hours
MDT = Z - 6 hours

examples: 11 am MST = 1800Z (6:00 pm GMT)
or
1800 MDT (6:00 pm) = 0000Z (Midnight the next day GMT)

Map of World Time Zones

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Clear and Cooler Temperatures Across Much of the Eastern U.S.; Heavy Rain in Florida

GJT Time Zone Info