Dangerous Heat Continues Across the Southwest U.S.; Fire Weather Conditions Across the Great Basin

Dangerous heat will continue across the Southwest U.S. and southern California into early next week. Excessive Heat Warnings and Heat Advisories remain in effect. Gusty winds and dry conditions may lead to elevated to near critical fire weather conditions across the Great Basin and northern Sierra. Air Quality Alerts remain in effect into Monday for large parts of Oregon, Idaho, and Wyoming. 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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Dangerous Heat Continues Across the Southwest U.S.; Fire Weather Conditions Across the Great Basin

GJT Time Zone Info