The Weather Station Model

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# The Weather Station Model - PowerPoint PPT Presentation

The Weather Station Model. Draw a Station Model. Get accompanying notes here. © Steve Kluge 2007 Some images from the NYSED Earth Science Reference Tables. Decoding the Coded Pressure. 196. Insert a decimal point to the left of the last digit. 19.6.

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Presentation Transcript

The Weather Station Model

Draw a Station Model

Get accompanying notes here

©Steve Kluge 2007 Some images from the NYSED Earth Science Reference Tables

Decoding the Coded Pressure

196

Insert a decimal point to the left of the last digit

19.6

Put a “9” and a “10” in front of the result

1019.6

919.6

Test the results against the range of normal atmospheric pressures

919.6 is below the range of normal pressures….

REJECTED!

1019.6 is within the range of normal pressures….

ACCEPTED!

Coded pressure196= 1019.6mb

Decode these coded pressures: 002 993 280 000

1028.0

1000.0

999.3

1000.2

How to encode pressures

Back to the Station Model

Encoding the Pressure

1013.5

Remove the decimal point

10135

Report the last 3 digits

135

Pressure1013.5 = 135 encoded pressure

Encode these pressures: 1032.7 987.3 1012.2 1000.1

327

873

122

001

Back to Decoding Pressures

Back to the Station Model

The Barometric Trend

+ 19 /

+ means “Higher now than it was 3 hours ago”

(- means “Lower now than it was 3 hours ago”)

19means the pressure has changed by 1.9 mb

/ means the pressure is currently rising

(\ means the pressure is currently falling)

What was the pressure 3 hours ago?

Here?

1003.5

1017.7

Back to the Station Model

NE at 25 Knots

E at 5 Knots

SE at 10 Knots

Back to the Station Model

Draw a Station Model for These Conditions:

Temperature= 45F

Dewpoint= 32F

Wind NE at 20 knots

Overcast

Visibility= 1.5 miles

Rain Showers

Pressure Now= 997.3 mb

Pressure 3 hrs. ago= 1000.2mb

Barometer Falling

Precipitation in last 6 hrs.= .53 in.

Back to the Station Model