1. The Weather Station Model
Draw a Station Model
Get accompanying notes here
©Steve Kluge Some images from the NYSED Earth Science Reference Tables

2. 196 10196 Decoding the Coded Pressure Coded pressure 196= 1019.6 mb
See if the number is LESS or MORE than 500
If it’s LESS, place a 10 in front of it. If it’s MORE, place a 9 in front of it.
10196
THEN….put a decimal pt. right before the last digit…..
SO….you would get the pressure as… mb
Coded pressure 196= mb
Decode these coded pressures:
1000.2
999.3
1028.0
1000.0
Back to the Station Model
How to encode pressures
©S. Kluge 2007

3. 1013.5 10135 135 Encoding the Pressure….even easier!
Remove the decimal point
10135
Report the last 3 digits
135
Pressure = 135 encoded pressure
Encode these pressures:
327
873
122
001
Back to the Station Model
Back to Decoding Pressures
©S. Kluge 2007

4. / means the pressure is currently rising
The Barometric Trend /
+ means “Higher now than it was 3 hours ago”
(- means “Lower now than it was 3 hours ago”)
19 means 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?
1017.7
1003.5
Back to the Station Model
©S. Kluge 2007

5. Back to the Station Model
©S. Kluge 2007

6. NE at 25 Knots E at 5 Knots SE at 10 Knots Back to the Station Model
©S. Kluge 2007

7. 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= mb
Pressure 3 hrs. ago= mb
Barometer Falling
Precipitation in last 6 hrs.= .53 in.
Back to the Station Model
©S. Kluge 2007