Weather and its Impact on Aviation Operations National Weather Service Hastings, Nebraska Kearney...
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![Page 1: Weather and its Impact on Aviation Operations National Weather Service Hastings, Nebraska Kearney Explorers Club November 21, 2006.](https://reader035.fdocuments.in/reader035/viewer/2022062500/5697bfe21a28abf838cb4620/html5/thumbnails/1.jpg)
Weather and its ImpactWeather and its Impact on Aviation Operations on Aviation Operations
National Weather Service National Weather Service Hastings, Nebraska Hastings, Nebraska
Kearney Explorers Club
November 21, 2006
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High and Low High and Low Pressure SystemsPressure Systems
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Cold and Cold and Warm FrontsWarm Fronts
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Density AltitudeDensity Altitude
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Wind ShearWind Shear
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Wind ShearWind ShearChange in wind speed and direction as you
go higher in the atmosphere– Changes are sometimes very abrupt
Low level wind shear – Horizontal winds– Vertical winds
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Aircraft IcingAircraft Icing
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Aircraft IcingAircraft IcingDisrupts smooth flow of air over wing
surfaces and around airplane parts that stick out– Decreases lift– Adds weight to aircraft
Icing prevention– On the ground
De-icing procedure
– In the air Avoiding clouds with temperatures and humidities
which lead to ice buildups
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ThunderstormsThunderstorms
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Thunderstorm HazardsThunderstorm HazardsDownburst windsHailReduced visibilities
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Terminal AerodromeTerminal AerodromeForecastsForecasts
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Terminal Aerodrome ForecastsTerminal Aerodrome Forecasts
Airport specific forecasts within 5 miles of the center of the airport for a 24-hour period
Weather elements– Wind and wind shear– Cloud levels– Precipitation / fog / dust / sand– Visibility– Probability of precipitation toward the end of
the forecast
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Terminal Aerodrome ForecastsTerminal Aerodrome Forecasts
TAF GRI 191128Z 191212 25006KT P6SM SKC
FM1600 30010KT P6SM SKC
FM1900 33013KT P6SM SKC
FM0000 32006KT P6SM FEW250
FM0400 VRB03KT P6SM SCT250
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Regional AirportsRegional Airports
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NWS Hastings TAF SiteNWS Hastings TAF Site
Grand Island (KGRI)
– Located 2 miles east-northeast of Grand Island
– Elevation: 1846 ft. MSL
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NWS Hastings TAF SiteNWS Hastings TAF Site
Grand Island (KGRI)– Airport is serviced by an ASOS
Augmentation of observations is performed by Grand Island Control Tower personnel from 0600 to 2200 local time
Occurrences of precipitation or thunderstorms are manually appended to observations as a remark
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NWS Hastings TAF SiteNWS Hastings TAF Site Grand Island (KGRI)
– Main forecast considerations Diurnal pressure gradient winds Thunderstorm intensities during convective season
Low ceilings/visibilities during stratiform precipitation events
Radiation Fog
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Transcribed WeatherTranscribed WeatherBroadcastsBroadcasts
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Transcribed Weather BroadcastsTranscribed Weather Broadcasts
Weather forecasts for expected conditions 25 miles on either side of specified routes of flight (50 mile-wide corridor)
12-hour forecast
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Regional AirportsRegional Airports
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TWEB 261 KOMA-KGRI-KLBF
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TWEB 261 KOMA-KGRI-KLBF TWEB 261 KOMA-KGRI-KLBF
Combines regional surface observations (METARs) and terminal forecasts (TAFs)– METARs: Omaha, Offutt AFB, Council Bluffs (IA),
Millard, Fremont, Lincoln, Columbus, York, Aurora, Grand Island, Hastings, Kearney, Broken Bow, Lexington, North Platte
– TAFs: Omaha, Lincoln, Grand Island, North Plattte
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TWEB 261 KOMA-KGRI-KLBFTWEB 261 KOMA-KGRI-KLBFPrevailing conditions defined for entire
route or portions of the route– Logical separation of meteorological
occurrencesPre-frontal conditionsPost-frontal conditionsAirmass thunderstormsSurface gradient winds > 25 knotsLow level wind shear
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Questions?Questions?
The End The End