Weather and Meteorology Presentation Presented by : Tesmond Hurd LMS Weather Station (La Grande Weather Service) http://la...
The Definition of Weather <ul><li>Weather is the state of the atmosphere regarding wind, moisture, temperature, cloud cove...
What’s the difference between weather and climate??? <ul><li>Weather is what is currently going on. When somebody says, “I...
What do I do… <ul><li>I collect data </li></ul><ul><li>Analyze weather patterns </li></ul><ul><li>Maintain/Manage a websit...
About the  National Weather Service <ul><li>Mostly meteorologists work for the NWS. The </li></ul><ul><li>NWS’ job is to a...
NOAA Field Map
About  meteorologists <ul><li>Starting Pay: $30,000; Top Pay: $146,000 </li></ul><ul><li>EX: Dennis Hull-Warning Coordinat...
What meteorologists use to help predict the weather… 0.50 0.40 0.30 0.20 0.10 0.00
Clouds <ul><li>Clouds are formed when water evaporates in the sky and changes into the gas form, we them as clouds. </li><...
Warm/Cold Fronts <ul><li>Warm Fronts </li></ul><ul><li>A transition zone </li></ul><ul><li>between a mass of </li></ul><ul...
Stationary/Occluded Fronts <ul><li>Stationary Fronts </li></ul><ul><li>A front between warm and </li></ul><ul><li>cold air...
High/Low Pressures <ul><li>High Pressure </li></ul><ul><li>An area of pressure </li></ul><ul><li>that is higher than </li>...
Terminology… <ul><li>Millibar -A unit of atmospheric pressure equal to 1/1000 bar; one unit that is used to measure air pr...
National Weather Service Doppler Radar United States of America Canada Pacific Ocean Gulf of Mexico Atlantic Ocean
Mixed Surface Analysis Mixed Surface Analysis
Snow | Snow Level 8000 ft. 7000 ft. 6000 ft. 5000 ft. 4000 ft. 3000 ft. 2000 ft. 1000 ft. 0 ft. 0    50      100    150   ...
Question:  Why does the Grande Ronde Valley get so much wind? Baker City La Grande Ladd Canyon L H
Last Weekend H Maritime Polar (mP) Maritime Tropical (mT)
Tornadoes <ul><ul><li>Tornadoes are violently </li></ul></ul><ul><ul><li>rotating column of air, usually </li></ul></ul><u...
Types of Tornadoes <ul><li>Weak Tornadoes </li></ul><ul><li>88% of all tornadoes </li></ul><ul><li><5% of tornado deaths <...
STEP #1 How Tornadoes Form…
STEP #2 How Tornadoes Form
STEP #3 | Final Step How Tornadoes Form… Low – Level Wind = Updraft
[Enhanced] Fujita (Tornado Intensity) Scale E-F6 318+ Inconceivable E-F5 261-317 Incredible  E-F4 207-260 Devastating E-F3...
Tornado:  Fact  or  Fiction ? <ul><li>Every state has had  at least  one tornado. </li></ul><ul><li>Tornadoes can’t form a...
Tornado Facts <ul><li>Tornado State Rankings </li></ul><ul><li>Florida </li></ul><ul><li>Kansas </li></ul><ul><li>Illinois...
UNION COUNTY TORNADO Begin Date: June 21, 1983; 1415 (2:15) PDT Begin Location: Not Known Begin LAT/LON: 45°22'N / 118°03'...
Hurricanes <ul><li>A tropical cyclone in the </li></ul><ul><li>Atlantic, Caribbean Sea, </li></ul><ul><li>Gulf of Mexico, ...
Step #1 How Hurricanes Form… L
Step #2 How Hurricanes Form
Step #3 | Final Step How Hurricanes Form… H
Saffir-Simpson (Hurricane Intensity) Scale
NWS Building Entrance
NWS Office
NWS Office
NWS Office
NWS Radar What does RADAR stand for? RA dio Detection A nd R anging
NOAA Weather Radio NWR N OAA W eather R adio
Thank you for listening to my presentation…I hope you enjoyed it! Copyright © 2009 La Grande Weather Service, National Wea...
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  • Weather And Meteorology Presentation

    1. 1. Weather and Meteorology Presentation Presented by : Tesmond Hurd LMS Weather Station (La Grande Weather Service) http://lagrande.weatherchecker.us http://www.weatherchecker.us
    2. 2. The Definition of Weather <ul><li>Weather is the state of the atmosphere regarding wind, moisture, temperature, cloud coverage, pressure, and other meteorological conditions. </li></ul><ul><li>Meteorology is the scientific study of the Earth’s atmosphere, especially its patterns or climate and weather </li></ul>
    3. 3. What’s the difference between weather and climate??? <ul><li>Weather is what is currently going on. When somebody says, “It is 32 degrees…” they are talking about weather . </li></ul><ul><li>Climate is weather, in a sense, but as an average. When somebody says, “The average temperature in July for the last 15 years is 80 degrees…” they are talking about the climate . Climate varies from place to place. </li></ul>
    4. 4. What do I do… <ul><li>I collect data </li></ul><ul><li>Analyze weather patterns </li></ul><ul><li>Maintain/Manage a website </li></ul><ul><li>Predict weather/specifically hazardous weather (e.g.: snow, thunderstorms, etc.) </li></ul>
    5. 5. About the National Weather Service <ul><li>Mostly meteorologists work for the NWS. The </li></ul><ul><li>NWS’ job is to analyze and monitor weather conditions and issue advisories, watches, and warnings when weather becomes hazardous. The motto for the NWS is: “For the protection of life and property.” There are several branches of the NWS. Storm Spotters are important to the NWS because they REPORT hazardous weather. </li></ul>
    6. 6. NOAA Field Map
    7. 7. About meteorologists <ul><li>Starting Pay: $30,000; Top Pay: $146,000 </li></ul><ul><li>EX: Dennis Hull-Warning Coordinator Meteorologist </li></ul><ul><li>30 years as meteorologist/10 in PDT </li></ul><ul><li>His Pay: $100-105,000 </li></ul><ul><li>Education: Bachelor’s degree in Meteorology </li></ul><ul><li>3-year internship </li></ul><ul><li>Meteorology, math, and physics </li></ul>
    8. 8. What meteorologists use to help predict the weather… 0.50 0.40 0.30 0.20 0.10 0.00
    9. 9. Clouds <ul><li>Clouds are formed when water evaporates in the sky and changes into the gas form, we them as clouds. </li></ul><ul><li>There are 32 types of clouds including tornadoes! </li></ul>Fractus Cirrus, Cumulus, Stratus, Cumulonimbus, Shelf ,Wave, & Wall cloud, Mammatus, and tornado Other Strato Alto Cumulus Nimbo Alto Stratus Cumulus Stratus Cirro
    10. 10. Warm/Cold Fronts <ul><li>Warm Fronts </li></ul><ul><li>A transition zone </li></ul><ul><li>between a mass of </li></ul><ul><li>warm air and the </li></ul><ul><li>colder air it is replacing. </li></ul><ul><li>Cold Fronts </li></ul><ul><li>A transition zone </li></ul><ul><li>between a mass of cold </li></ul><ul><li>air and the warm air it </li></ul><ul><li>is replacing. </li></ul>
    11. 11. Stationary/Occluded Fronts <ul><li>Stationary Fronts </li></ul><ul><li>A front between warm and </li></ul><ul><li>cold air masses that is </li></ul><ul><li>moving very slowly or not </li></ul><ul><li>at all. </li></ul><ul><li>Occluded Fronts </li></ul><ul><li>A composite front formed </li></ul><ul><li>when a cold air mass meets </li></ul><ul><li>and undercuts a warm air </li></ul><ul><li>mass, and forces the warm </li></ul><ul><li>air upwards and way from </li></ul><ul><li>contact with the earths </li></ul><ul><li>surface. </li></ul>
    12. 12. High/Low Pressures <ul><li>High Pressure </li></ul><ul><li>An area of pressure </li></ul><ul><li>that is higher than </li></ul><ul><li>surrounding, lower </li></ul><ul><li>pressures. High </li></ul><ul><li>pressures circle </li></ul><ul><li>clockwise. </li></ul><ul><li>Low Pressure </li></ul><ul><li>An area of pressure that </li></ul><ul><li>is lower than </li></ul><ul><li>surrounding, higher </li></ul><ul><li>pressures. Low pressures </li></ul><ul><li>circle counter-clockwise. </li></ul>H L
    13. 13. Terminology… <ul><li>Millibar -A unit of atmospheric pressure equal to 1/1000 bar; one unit that is used to measure air pressure. </li></ul><ul><li>Isobar -A line on a weather map connecting equal pressures. </li></ul><ul><li>Barometric Pressure -The pressure of the atmosphere, as indicated by a barometer. </li></ul><ul><li>Radar -A radio device used for locating an object by using ultrahigh-frequency radio waves reflected from the object and received, observed, and analyzed. In this case, precipitation. </li></ul><ul><li>Weather Balloon -a balloon used to carry meteorological instruments. </li></ul><ul><li>Weather Station -an observation post where meteorological conditions are (observed and) recorded. </li></ul>
    14. 14. National Weather Service Doppler Radar United States of America Canada Pacific Ocean Gulf of Mexico Atlantic Ocean
    15. 15. Mixed Surface Analysis Mixed Surface Analysis
    16. 16. Snow | Snow Level 8000 ft. 7000 ft. 6000 ft. 5000 ft. 4000 ft. 3000 ft. 2000 ft. 1000 ft. 0 ft. 0 50 100 150 200 250 miles
    17. 17. Question: Why does the Grande Ronde Valley get so much wind? Baker City La Grande Ladd Canyon L H
    18. 18. Last Weekend H Maritime Polar (mP) Maritime Tropical (mT)
    19. 19. Tornadoes <ul><ul><li>Tornadoes are violently </li></ul></ul><ul><ul><li>rotating column of air, usually </li></ul></ul><ul><ul><li>suspended to a Cumulonimbus </li></ul></ul><ul><ul><li>cloud, with circulation reaching </li></ul></ul><ul><ul><li>the ground. It nearly always </li></ul></ul><ul><ul><li>starts as a funnel cloud and </li></ul></ul><ul><ul><li>may be accompanied by a </li></ul></ul><ul><ul><li>loud roaring noise. On a local </li></ul></ul><ul><ul><li>scale, it is the most </li></ul></ul><ul><ul><li>destructive of all atmospheric </li></ul></ul><ul><ul><li>phenomena. (VIDEO) </li></ul></ul>SPRING SEASON : March-June FALL SEASON : August-October
    20. 20. Types of Tornadoes <ul><li>Weak Tornadoes </li></ul><ul><li>88% of all tornadoes </li></ul><ul><li><5% of tornado deaths </li></ul><ul><li>Lifetime: 1-10+ minutes </li></ul><ul><li>Winds <110 mph </li></ul><ul><li>Violent Tornadoes </li></ul><ul><li><1% of all tornadoes </li></ul><ul><li>70% of all tornado deaths </li></ul><ul><li>Lifetime can exceed 1 hour </li></ul><ul><li>Winds >205 mph </li></ul><ul><li>Strong Tornadoes </li></ul><ul><li>11% of all tornadoes </li></ul><ul><li>Nearly 30% of all tornado deaths </li></ul><ul><li>May last 20+ minutes </li></ul><ul><li>Winds 110-205 mph </li></ul>
    21. 21. STEP #1 How Tornadoes Form…
    22. 22. STEP #2 How Tornadoes Form
    23. 23. STEP #3 | Final Step How Tornadoes Form… Low – Level Wind = Updraft
    24. 24. [Enhanced] Fujita (Tornado Intensity) Scale E-F6 318+ Inconceivable E-F5 261-317 Incredible E-F4 207-260 Devastating E-F3 158-206 Severe E-F2 113-157 Considerable E-F1 73-112 Moderate E-F0 40-72 Light E. Fujita # Wind Damage
    25. 25. Tornado: Fact or Fiction ? <ul><li>Every state has had at least one tornado. </li></ul><ul><li>Tornadoes can’t form anytime during the year. </li></ul><ul><li>People caught in the open, should seek shelter under highway overpasses. </li></ul><ul><li>Areas near lakes, rivers, and the ocean aren’t safe from tornadoes. </li></ul><ul><li>Tornadoes can happen in the mountains or in high elevations. </li></ul>True False False True True
    26. 26. Tornado Facts <ul><li>Tornado State Rankings </li></ul><ul><li>Florida </li></ul><ul><li>Kansas </li></ul><ul><li>Illinois </li></ul><ul><li>Iowa </li></ul><ul><li>Alabama </li></ul><ul><li>Oregon </li></ul><ul><li># of Tornadoes </li></ul><ul><li>1999-2008 </li></ul><ul><li>1291 tornadoes </li></ul><ul><li>123 EF2+ tornadoes </li></ul><ul><li>1989-1998 </li></ul><ul><li>1165 tornadoes </li></ul><ul><li>143 EF2+ tornadoes </li></ul><ul><li>1979-1988 </li></ul><ul><li>820 tornadoes </li></ul><ul><li>161 EF2+ tornadoes </li></ul>
    27. 27. UNION COUNTY TORNADO Begin Date: June 21, 1983; 1415 (2:15) PDT Begin Location: Not Known Begin LAT/LON: 45°22'N / 118°03'W (LADD CANYON) End Location: Not Known Length: 0 Mile Width: 17 Yards Magnitude: F0 Fatalities: 0 Injuries: 0 Property Damage: $25,000.00 Crop Damage: $0.00 Description: None Reported
    28. 28. Hurricanes <ul><li>A tropical cyclone in the </li></ul><ul><li>Atlantic, Caribbean Sea, </li></ul><ul><li>Gulf of Mexico, or </li></ul><ul><li>eastern Pacific, which </li></ul><ul><li>the maximum 1-minute </li></ul><ul><li>sustained surface wind is </li></ul><ul><li>74 mph greater. Hurricanes </li></ul><ul><li>are classified on the Saffir- </li></ul><ul><li>Simpson Scale to describe </li></ul><ul><li>their wind speeds. (VIDEO) </li></ul>
    29. 29. Step #1 How Hurricanes Form… L
    30. 30. Step #2 How Hurricanes Form
    31. 31. Step #3 | Final Step How Hurricanes Form… H
    32. 32. Saffir-Simpson (Hurricane Intensity) Scale
    33. 33. NWS Building Entrance
    34. 34. NWS Office
    35. 35. NWS Office
    36. 36. NWS Office
    37. 37. NWS Radar What does RADAR stand for? RA dio Detection A nd R anging
    38. 38. NOAA Weather Radio NWR N OAA W eather R adio
    39. 39. Thank you for listening to my presentation…I hope you enjoyed it! Copyright © 2009 La Grande Weather Service, National Weather Service/NOAA, & Intellicast/WSI.com
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