Transcript File
Station Models Page 5 Allows weather data to be plotted on a map in a condensed & usable format. It shows the current weather conditions for a particular location. Station Models on a Map Page 5 Page 5 Keys to Weather Map Symbols What page of the ESRT? 13 Station Model Purpose: Page 5 allows data to be plotted in a condensed and usable format Temperature and Dewpoint are always in Fahrenheit Wind direction: winds are identified as the direction FROM which they come Barometric pressure is shortened to a 3-digit number station model code Page 5 Weather Variables and Locations Wind Direction The staff will point the direction the wind is coming from Temp Staff dewpt What is the wind direction in this example? ANSWER: Northwest or West Northwest Wind 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 Wind Symbols: Speed Calm Less than 5kts 5 kts 10 kts 50 kts Now You Try It 45kts 15kts 20kts 25kts 30kts 40kts 35kts Westerly Wind North Westerly Wind Southern Wind On a station model, cloud coverage is described in these forms: no clouds about 60% about 10% about 75% about 25% about 80% about 40% completely overcast about 50% sky obscured Samples of present weather symbols. fog haze , rain snow * slight rain thunderstorm drizzle lightning showers . ice or snow pellets cloud development not observed Current Barometric Pressure Temp dewpt pressure Barometric Pressure is VERY important! average barometric pressure at sea level is 1013.25 mb or 29.92 in. of Hg current barometric pressure is reported to the nearest TENTH BUT, they don’t want to waste space Pressure Conversion 053 Air pressure (mb) (1005.3) Station model The 500 Rule Below 500 add 10 Above 500 add a 9 542 954.2 and add a decimal before last number 101 1010.1 Page 5 Keys to Weather Map Symbols What page of the ESRT? 13 Lets Practice Page 5 What is the pressure? 084 08.4 1008.4 962 96.2 996.2 281 28.1 1028.1 875 87.5 987.5 322 32.2 1032.2 Convert Page 6 to their short form: 180 184 1) 1018.0 ______ 2) 1018.4 ________ 822 4) 975.6 756 3) 982.2 ______ __________ 848 001 182 5) 984.8 ______ 6) 1000.1 _________ 891 111 7) 1018.2 888 _____ 8) 989.1 __________ 9) 988.8 ______ 10) 1011.1 ________ Page 6 Convert to Long Form 980.0 16) 800 _______ 1020.6 11)206 ________ 998.7 17) 987 _______ 1028.1 12)281 ________ 18) 768 _______ 976.8 1008.0 ________ 1000.0 19) 000 _______ 1016.8 14)168 ________ 1016.5 20) 165 _______ 988.8 15)888 ________ 13)080 Page 6 Station Model Quiz A. 74 10 A. 002 -31\ 72 .50 SE Wind direction ___________ 15knots wind speed ___________ cloud cover ___________ 50% temperature ___________ 74ºF 72ºF dewpoint ___________ air pressure ___________ 1000.2mb pressure change ___________ -3.1mb visibility ___________ 10mi Present weather ___________ NONE Page 6 Station Model Quiz B. B. 48 986 1/2 = 48 -2\ NW Wind direction ___________ 25knots wind speed ___________ cloud cover ___________ 100% temperature ___________ 48ºF 48ºF dewpoint ___________ air pressure ___________ 998.6mb pressure change ___________ -.2mb visibility ___________ ½ mi Present weather ___________ Fog Page 7 Construct a Station Model #2 Station Model Quiz 1. 2 2. 3 3. 4 4. 1 5. 1 Page 7