The Weather Station Model Draw a Station Model Get accompanying notes here ©Steve Kluge 2007 Some images from the NYSED Earth Science Reference Tables

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… 1019.6 mb Coded pressure 196= 1019.6 mb Decode these coded pressures: 002 993 280 000 1000.2 999.3 1028.0 1000.0 Back to the Station Model How to encode pressures ©S. Kluge 2007

1013.5 10135 135 Encoding the Pressure….even easier! Remove the decimal point 10135 Report the last 3 digits 135 Pressure 1013.5 = 135 encoded pressure Encode these pressures: 1032.7 987.3 1012.2 1000.1 327 873 122 001 Back to the Station Model Back to Decoding Pressures ©S. Kluge 2007

/ means the pressure is currently rising The Barometric Trend + 19 / + 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

Back to the Station Model ©S. Kluge 2007

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

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 ©S. Kluge 2007