Station Models How Meteorologist can look at a lot of cities’ data at once!

Temp Temperature information in degrees Fahrenheit. 70 No LABEL: ex 70 degrees Fahrenheit

Temp dewpt Dew Point Temperature in degrees Fahrenheit. No LABEL: ex 70 degrees Fahrenheit with a Dp of 60 degrees Fahrenheit 70 60

Total amount of cloud graphic depiction of percentage of the sky covered by clouds

no clouds about 10% about 25% about 40% about 50% about 60% about 75% about 80% completely overcast sky obscured

What is the present weather? The current weather is very important. A detailed set of symbols provides weather descriptions. Found here!

100 different symbols provide details about the PRESENT WEATHER.

Samples of present weather symbols. fog haze thunderstorm, drizzle lightning rain * snow slight rain showers. ice or snow pellets cloud development not observed

Intensity of Weather Conditions Sometimes to show higher/lower intensity more/less of the same symbol is used

Wind direction A staff is rotated around the station. Remember, winds are identified as the direction FROM which they come. This would be a (WNW) west northwest wind or about 290º.

Wind Speed Attached to the staff are symbols for speed.

The coding for the wind speed symbols can be generalized as: half staff about 5 knots note, it is not on the end of the wind direction staff full staff about 10 knots these are additive for the total amounts three full staffs=30 knots

pressure Current Barometric Pressure Always is shown as a 3 digit number. They represent the tens, ones and tenths place. Ex mb = 134

Barometric Pressure is VERY important! average barometric pressure at sea level is mb. current barometric pressure is reported to the nearest TENTH BUT, they don’t want to waste space

average barometric pressure at sea level is mb. barometric pressure varies around this value somewhat higher somewhat lower + about 30 = about 30 = 983

average barometric pressure at sea level is mb. barometric pressure varies around this value they do not PRINT the beginning number or numbers they, also, do not PRINT the decimal point, but report to the nearest TENTH x 133

How would each of these pressures be recorded on a station model? mb mb mb mb 1010 mb 1000 mb

How would each of these pressures be recorded on a station model? mb mb mb mb mb mb

From the three numbers, you must INTERPRET whether the preceding value is 10 or 9 Which would make the value most realistic?

What the value on the station model represents: GREATER than 5, place a 9 before it. LESS THAN or EQUAL to 5, place a 10 before it and add a decimal between the last two digits GREATER than 5, place a 9 before it. and add a decimal between the last two digits mb

What the value on the station model represents: GREATER than 5, place a 9 before it. LESS THAN or EQUAL to 5, place a 10 before it and add a decimal between the last two digits 842 GREATER than 5, place a 9 before it. and add a decimal between the last two digits mb

What the value on the station model represents: GREATER than 5, place a 9 before it. LESS THAN or EQUAL to 5, place a 10 before it and add a decimal between the last two digits 731 GREATER than 5, place a 9 before it. and add a decimal between the last two digits mb

What the value on the station model represents: GREATER than 5, place a 9 before it. LESS THAN or EQUAL to 5, place a 10 before it and add a decimal between the last two digits 600 GREATER than 5, place a 9 before it. and add a decimal between the last two digits mb

What the value on the station model represents: GREATER than 5, place a 9 before it. LESS THAN or EQUAL to 5, place a 10 before it and add a decimal between the last two digits 599 LESS THAN or EQUAL to 5, place a 10 before it and add a decimal between the last two digits mb

What the value on the station model represents: GREATER than 5, place a 9 before it. LESS THAN or EQUAL to 5, place a 10 before it and add a decimal between the last two digits 406 LESS THAN or EQUAL to 5, place a 10 before it and add a decimal between the last two digits mb

What the value on the station model represents: GREATER than 5, place a 9 before it. LESS THAN or EQUAL to 5, place a 10 before it and add a decimal between the last two digits 024 LESS THAN or EQUAL to 5, place a 10 before it and add a decimal between the last two digits mb

What the value on the station model represents: GREATER than 5, place a 9 before it. LESS THAN or EQUAL to 5, place a 10 before it and add a decimal between the last two digits 000 LESS THAN or EQUAL to 5, place a 10 before it and add a decimal between the last two digits mb

Therefore, the LARGEST barometric pressure represented on a station model is mb and is recorded on a station model as 599

And the SMALLEST barometric pressure represented on a station model is mb and is recorded as 600

Pressure Summary Shown on a station Model: Equals: mb mb mb mb mb mb mb mb Think like a video game or odometer that gets too large and starts back at 0!

Not only is the pressure itself important, but so is the way the pressure has been changing. So, more information may be given and must be coded.

Pressure trend change How much the pressure has changed The pattern and amount of change in the past three hours Again, reported in TENTHS without the decimal or label + it is higher now than in the past - it is lower now than in the past

How would the following barometric trends be recorded on a station model? Over the past 3 hours, the pressure has been steadily increasing at a rate of 1.2 mb 1mb 0.9 mb

steadily increasing means a “+” symbol followed by the ones and tenths place (no decimal or label) then the symbol 1.2 mb = +12/ 1mb = +10/ 0.9 mb = +09/

Other info: Visibility Amount of precip. Amount of precipitation is plotted in inches to the nearest hundredth of an inch. Visibility is given in miles and fractions

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. Draw a Station Model for These Conditions: ©S. Kluge 2007 Back to the Station Model