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Time in Meteorology Meteorologists need to use the same time everywhere since we exchange Time in Meteorology Meteorologists need to use the same time everywhere since we exchange

Time in Meteorology Meteorologists need to use the same time everywhere since we exchange - PowerPoint Presentation

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Uploaded On 2020-10-22

Time in Meteorology Meteorologists need to use the same time everywhere since we exchange - PPT Presentation

Meteorologists use the local standard time at the Greenwich Meridian 0 longitude near London Many Names Greenwich Mean Time GMT Universal Coordinated Time UTC Zula Time Z Generally UTC is used today but some groups like the NWS often use Z and GMT ID: 815777

time utc pdt october utc time october pdt add greenwich convert subtract gmt meridian clock meteorologists standard

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Presentation Transcript

Slide1

Time in Meteorology

Slide2

Meteorologists need to use the same time everywhere since we exchange data globally

Slide3

Meteorologists use the local standard time at the Greenwich Meridian (0° longitude, near London).

Many Names

Greenwich Mean Time (GMT)

Universal Coordinated Time (UTC)

Zula Time (Z)

Generally, UTC is used today, but some groups (like the NWS) often use Z and GMT.

Slide4

How to convert. UTC is LATER than Pacific time since the Greenwich Meridian is to our east

UTC = PST + 8

hr

UTC = PDT + 7

hr

Uses a 24

hr

clock

First, convert our time to 24

hr

clock

Then, add 7 or 8

hr

depending on whether we are in daylight or standard times.

If the sum is equal to or greater than 24

hr

, subtract 24h and add one day.

Slide5

Examples

4 AM PDT 1 October:

4 AM become O4

Add 7

hr

= 11 UTC 1 October

4 PM PDT 1 October

4 PM become 16

Add 7

hr

= 23 UTC 1 October

6 PM PDT 1 October

6 PM becomes 18

18 + 7= 25 UTC. Need to subtract 24 and becomes 01 UTC 2 October

Your test: 10 PM PDT 1 October is what in UTC?

You need to be able to do this conversion or you won’t be able to understand weather maps.

Slide6